diff --git a/docs/project-memory/shared-memory/decision-log.md b/docs/project-memory/shared-memory/decision-log.md
index ae2538f78..83fa87b86 100644
--- a/docs/project-memory/shared-memory/decision-log.md
+++ b/docs/project-memory/shared-memory/decision-log.md
@@ -5809,7 +5809,7 @@
 
 - 决策：`assetKind` 是编辑器资源和素材唯一权威媒体类别；不新增或返回 `mediaType`。`character-animation` 渲染为序列帧，`video` 渲染为视频，`audio/sound-effect/background-music` 渲染为音频，其余类别渲染为图片。前端内部可保留派生的 `CanvasMediaType` 选择渲染器，但不能把它作为后端事实。
 - 持久化边界：`editor_project_resource` 与 `editor_asset` 表尾只保存 `image_sequence_frames_json` 与 `image_sequence_duration_ms`，默认均为 `None`；`editor_showcase_asset` 作为提交时冻结的审核与公开快照，同样在表尾保存这两个字段并从账号素材逐字段复制，旧行默认均为 `None`。正式帧对象和角色动作生成响应都不保存或返回 `frameIndex`，数组位置是唯一播放顺序；帧数取数组长度，FPS 由帧数和毫秒时长即时推导，不持久化 `frame_count`、`fps` 或通用 `duration_seconds`。后端处理抽帧和逐帧去背时仍保留内部 `frame_index`，仅用于乱序并发收口、OSS 命名、日志和错误定位；仓库内旧 helper 同步升级，不为它保留外部兼容字段。
-- 时长口径：`image_sequence_duration_ms` 只表示角色图片序列完整播放一次的毫秒时长，与音频 / 视频生成请求中的 `durationSeconds` 完全分离。角色动作与视频生成响应仍可携带各自既有的请求 / 结果级 `frameCount/fps/durationSeconds`，音视频画布布局也可保留既有运行时秒数；不得为音频生成响应新增 `durationSeconds`，也不得把任何音视频秒数写入资源 / 素材或图片序列字段。前端播放器使用 `imageSequenceDurationMs / imageSequenceFrames.length`，Spine 导出时才换算秒数并推导 FPS。
+- 时长口径：`image_sequence_duration_ms` 只表示角色图片序列完整播放一次的毫秒时长，与音频 / 视频生成请求中的 `durationSeconds` 完全分离。角色动作与视频生成响应仍可携带各自既有的请求 / 结果级 `frameCount/fps/durationSeconds`；通用音视频秒数不进入资源 / 素材正式列、`EditorAsset`、`CanvasLayer` 或画布 layout，只允许把上传探测值或生成请求值格式化为用户可见字符串后写入 `generation_inputs_json.fields[]` 供素材详情展示。素材放置与工程恢复不做媒体探测，也不从 layout / resource 回退；音频播放只使用媒体 `loadedmetadata.duration`。不得为音频生成响应新增 `durationSeconds`，也不得把音视频秒数写入图片序列字段。前端角色动作播放器使用 `imageSequenceDurationMs / imageSequenceFrames.length`，Spine 导出时才换算秒数并推导 FPS。
 - 写入与复用边界：`assetKind=character-animation` 必须在 SpacetimeDB storage/procedure 边界同时提供至少两帧有效数组与大于 0 的图片序列毫秒时长；其他类别不得携带图片序列字段。同项目同源同媒体资源只允许 `None → Some` 单调回填，非空冲突失败关闭，延迟重试的 `updated_at` 取请求时间与既有时间的较大值。
 - 生成关联边界：角色动作生成响应同时返回已经持久化的最终 `resource` / `asset`；带项目上下文时前端结果图层必须直接使用 `resource.resourceId` 及其预览视频来源血缘，缺少 resource 直接失败。无项目放置也必须绑定响应中的正式账号素材，不能从响应 `frames` 构造无资产真相的本地动作结果。
 - repair 幂等边界：legacy 音频 repair 不再派生或回填任何资源级通用时长，因此新列上线前已完成 repair 的重放继续按原字段精确匹配；图片序列字段在音频行上均为 `None`。
diff --git a/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md b/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
index ba7230363..613415146 100644
--- a/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
+++ b/docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md
@@ -429,7 +429,7 @@ Responses 的终态载荷既是工具调用的恢复源，也是正文的恢复
 
 - `asset_kind` 是资源 / 素材唯一权威媒体类别，不新增或返回 `media_type` / `mediaType`。角色动作预览 MP4 使用 `asset_kind = video`，最终透明帧集使用 `asset_kind = character-animation`；前端据此派生具体渲染器。
 - `editor_project_resource` 与 `editor_asset` 表尾只追加 `image_sequence_frames_json: Option<String>` 和 `image_sequence_duration_ms: Option<u64>`；`editor_showcase_asset` 作为提交时冻结的审核与公开快照，也在表尾追加并从账号素材复制相同两字段。前者保存完整有效帧数组，数组位置是唯一播放顺序，正式帧对象不保存或返回 `frameIndex`；后者只表示该图片序列完整播放一次的毫秒时长。帧数始终取数组长度，FPS 在播放或导出时即时推导，不持久化 `frame_count` 或 `fps`。
-- 图片序列时长不能复用音频 / 视频生成请求的 `durationSeconds`，资源和素材也不保存通用 `duration_seconds`。角色动作与视频生成响应保留各自既有的请求 / 结果级秒数，音频 / 视频图层的既有运行时秒数可留在画布布局中；音频生成响应不得新增 `durationSeconds`，音频实际时长仍可由 `<audio>` 的 `loadedmetadata.duration` 获取，但这些值都不得映射到资源、素材或图片序列字段。
+- 图片序列时长不能复用音频 / 视频生成请求的 `durationSeconds`，资源和素材也不保存通用 `duration_seconds`。角色动作与视频生成响应保留各自既有的请求 / 结果级秒数；音频 / 视频的用户可见时长只作为字符串展示项写入 `generation_inputs_json.fields[]`，上传媒体使用本次上传探测值，带时长选项的生成任务使用用户提交值，不再复制到 `EditorAsset`、`CanvasLayer` 或画布 layout，也不在素材放置 / 工程恢复时探测或从 layout、resource 做双来源回退。音频播放控件只信任 `<audio>` 的 `loadedmetadata.duration`，展示字段不得参与播放、裁切或变速。音频生成响应不得新增 `durationSeconds`，这些展示值也不得映射到资源、素材正式列或图片序列字段。
 - 角色动作 worker 在透明帧全部持久化后创建最终项目资源与账号素材，并写入帧数组与 `image_sequence_duration_ms`；生成响应可继续返回请求 / 结果层面的 `frameCount`、`fps`、`durationSeconds`，但它们不是持久化真相。预览视频仍作为独立 `asset_kind = video` 中间素材保留并承担生成成本，最终派生素材成本为 0。
 - `create_editor_project_resource`、`create_editor_asset` 和同源资源回填必须在 procedure/storage 边界验证最终状态：`asset_kind = character-animation` 必须同时包含至少两帧的有效数组和大于 0 的 `image_sequence_duration_ms`；其他类别不得携带任一图片序列字段。同源资源只允许从 `None` 单调补齐字段，非空冲突失败关闭，补写后的 `updated_at` 不得早于既有时间。
 - `generation_inputs_json` 只保存用户生成 / 重放输入，例如 `fields`、`references`、`artSpec`；动作输出和内部背景决策色不得再写入该 JSON。背景决策审计继续走独立审计链路。
diff --git a/server-rs/crates/api-server/src/character_animation_assets.rs b/server-rs/crates/api-server/src/character_animation_assets.rs
index d293188da..49badc324 100644
--- a/server-rs/crates/api-server/src/character_animation_assets.rs
+++ b/server-rs/crates/api-server/src/character_animation_assets.rs
@@ -74,7 +74,7 @@ use crate::{
         build_editor_canvas_resource_placement_item, complete_editor_canvas_generation_with_items,
         persist_editor_generated_media_asset,
         remove_editor_generated_screen_background_with_bgfilter,
-        resolve_editor_reference_object_key_for_owner,
+        resolve_editor_reference_object_key_for_owner, with_editor_media_duration_generation_input,
     },
     editor_screen_background_decision::{
         EditorScreenBackgroundDecisionInput, EditorScreenBackgroundDecisionKind,
@@ -1088,6 +1088,8 @@ pub(crate) async fn generate_editor_video_for_owner(
     })?;
     let normalized = normalize_editor_video_request_with_pricing(payload, &pricing)
         .map_err(|error| editor_video_error_response(&request_context, error))?;
+    let generation_inputs =
+        with_editor_media_duration_generation_input(generation_inputs, normalized.duration_seconds);
     let settings = require_editor_video_settings(&state, normalized.model.as_str())
         .map_err(|error| editor_video_error_response(&request_context, error))?;
     let http_client = build_upstream_http_client(settings.ark.request_timeout_ms)
@@ -1171,7 +1173,6 @@ pub(crate) async fn generate_editor_video_for_owner(
                 task_id: Some(task_id.clone()),
                 object_key: generated.object_key.clone(),
                 asset_object_id: generated.asset_object_id.clone(),
-                duration_seconds: Some(normalized.duration_seconds),
                 source_resource_id,
                 asset_kind: Some(asset_kind.clone()),
                 generation_inputs,
diff --git a/server-rs/crates/api-server/src/editor_project.rs b/server-rs/crates/api-server/src/editor_project.rs
index 92f7ad77a..a87430860 100644
--- a/server-rs/crates/api-server/src/editor_project.rs
+++ b/server-rs/crates/api-server/src/editor_project.rs
@@ -671,7 +671,6 @@ pub(crate) struct EditorCanvasGeneratedLayerInput {
     pub(crate) task_id: Option<String>,
     pub(crate) object_key: Option<String>,
     pub(crate) asset_object_id: Option<String>,
-    pub(crate) duration_seconds: Option<u32>,
     pub(crate) source_resource_id: Option<String>,
     pub(crate) asset_kind: Option<String>,
     pub(crate) generation_inputs: Option<Value>,
@@ -8104,7 +8103,6 @@ pub(crate) fn build_editor_canvas_generated_layer_item(
         "taskId": input.task_id,
         "objectKey": input.object_key,
         "assetObjectId": input.asset_object_id,
-        "durationSeconds": input.duration_seconds,
         "sourceResourceId": input.source_resource_id,
         "assetKind": input.asset_kind,
         "generationInputs": input.generation_inputs,
@@ -8535,6 +8533,41 @@ pub(crate) fn serialize_editor_generation_inputs(
     serialize_editor_asset_metadata(metadata)
 }
 
+pub(crate) fn with_editor_media_duration_generation_input(
+    metadata: Option<Value>,
+    duration_seconds: u32,
+) -> Option<Value> {
+    if duration_seconds == 0 {
+        return metadata;
+    }
+    let mut object = match metadata {
+        Some(Value::Object(object)) => object,
+        None => serde_json::Map::new(),
+        Some(value) => return Some(value),
+    };
+    let fields = object
+        .entry("fields".to_string())
+        .or_insert_with(|| Value::Array(Vec::new()));
+    let Some(fields) = fields.as_array_mut() else {
+        return Some(Value::Object(object));
+    };
+    fields.retain(|field| {
+        field
+            .get("title")
+            .and_then(Value::as_str)
+            .map(str::trim)
+            .is_none_or(|title| title != "时长" && title != "duration")
+    });
+    fields.push(json!({
+        "title": "时长",
+        "value": format!("{duration_seconds}秒"),
+    }));
+    object
+        .entry("references".to_string())
+        .or_insert_with(|| Value::Array(Vec::new()));
+    Some(Value::Object(object))
+}
+
 pub(crate) fn serialize_editor_image_sequence_frames(
     frames: Option<Value>,
 ) -> Result<Option<String>, AppError> {
@@ -10160,6 +10193,68 @@ mod tests {
         }
     }
 
+    #[test]
+    fn generated_media_canvas_item_keeps_duration_only_in_generation_inputs() {
+        let generation_inputs = with_editor_media_duration_generation_input(
+            Some(json!({
+                "fields": [
+                    { "title": "视频描述", "value": "角色挥手" },
+                    { "title": "duration", "value": "4秒" }
+                ],
+                "references": []
+            })),
+            5,
+        );
+        let completion = EditorCanvasGenerationCompletionRequest {
+            dialog_id: Some("dialog-video".to_string()),
+            title: "生成视频".to_string(),
+            placeholder: EditorCanvasGenerationPlaceholderPayload {
+                x: 120.0,
+                y: 80.0,
+                width: 560.0,
+                height: 315.0,
+                original_width: 1280.0,
+                original_height: 720.0,
+            },
+        };
+        let item = build_editor_canvas_generated_layer_item(
+            &completion,
+            EditorCanvasGeneratedLayerInput {
+                layer_id: "layer-video".to_string(),
+                resource_id: "resource-video".to_string(),
+                title: "生成视频".to_string(),
+                src: "/generated/video.mp4".to_string(),
+                thumbnail_src: None,
+                original_width: 1280,
+                original_height: 720,
+                display_width: 560.0,
+                display_height: 315.0,
+                source_type: "generated".to_string(),
+                prompt: Some("角色挥手".to_string()),
+                actual_prompt: None,
+                model: Some("seedance2.0-fast".to_string()),
+                provider: Some("VectorEngine".to_string()),
+                task_id: Some("task-video".to_string()),
+                object_key: Some("generated/video.mp4".to_string()),
+                asset_object_id: Some("asset-object-video".to_string()),
+                source_resource_id: None,
+                asset_kind: Some("video".to_string()),
+                generation_inputs,
+            },
+        );
+
+        assert!(item.get("durationSeconds").is_none());
+        assert_eq!(
+            item["generationInputs"]["fields"].as_array().map(Vec::len),
+            Some(2)
+        );
+        assert_eq!(
+            item["generationInputs"]["fields"][1]["title"],
+            json!("时长")
+        );
+        assert_eq!(item["generationInputs"]["fields"][1]["value"], json!("5秒"));
+    }
+
     #[test]
     fn editor_project_revision_conflicts_map_to_http_conflict() {
         let error = map_editor_project_error(SpacetimeClientError::Procedure(
diff --git a/server-rs/crates/api-server/src/vector_engine_audio_generation/generation.rs b/server-rs/crates/api-server/src/vector_engine_audio_generation/generation.rs
index 52d167ed7..fe565ea9a 100644
--- a/server-rs/crates/api-server/src/vector_engine_audio_generation/generation.rs
+++ b/server-rs/crates/api-server/src/vector_engine_audio_generation/generation.rs
@@ -23,7 +23,7 @@ use crate::{
     editor_project::{
         EditorCanvasGeneratedLayerInput, PersistEditorGeneratedAssetRequest,
         build_editor_canvas_generated_layer_item, complete_editor_canvas_generation_with_items,
-        persist_editor_generated_media_asset,
+        persist_editor_generated_media_asset, with_editor_media_duration_generation_input,
     },
     http_error::AppError,
     request_context::RequestContext,
@@ -220,6 +220,10 @@ pub(crate) async fn generate_editor_sound_effect_for_owner(
         .map_err(|error| error.into_response_with_context(Some(&request_context)))?;
     let normalized = normalize_editor_sound_effect_request_with_pricing(payload, &pricing)
         .map_err(|error| error.into_response_with_context(Some(&request_context)))?;
+    let generation_inputs = with_editor_media_duration_generation_input(
+        generation_inputs,
+        u32::from(normalized.duration),
+    );
     let settings = require_vector_engine_audio_settings(&state)
         .map_err(|error| error.into_response_with_context(Some(&request_context)))?;
     let http_client = platform_audio::build_vector_engine_audio_http_client(&settings)
@@ -316,7 +320,6 @@ pub(crate) async fn generate_editor_sound_effect_for_owner(
                 task_id: Some(generated.task_id.clone()),
                 object_key: generated.object_key.clone(),
                 asset_object_id: generated.asset_object_id.clone(),
-                duration_seconds: Some(u32::from(normalized.duration)),
                 source_resource_id: None,
                 asset_kind: Some("sound-effect".to_string()),
                 generation_inputs,
@@ -556,7 +559,6 @@ pub(crate) async fn generate_editor_background_music_for_owner(
                 task_id: Some(generated.task_id.clone()),
                 object_key: generated.object_key.clone(),
                 asset_object_id: generated.asset_object_id.clone(),
-                duration_seconds: None,
                 source_resource_id: None,
                 asset_kind: Some("background-music".to_string()),
                 generation_inputs,
diff --git a/src/components/creation-home/creationShowcaseModel.test.ts b/src/components/creation-home/creationShowcaseModel.test.ts
index 87f2b8d38..8f2da2f6a 100644
--- a/src/components/creation-home/creationShowcaseModel.test.ts
+++ b/src/components/creation-home/creationShowcaseModel.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, it } from 'vitest';
 
 import type { EditorProjectResourceSnapshot } from '../../services/image-editor/editorProjectClient';
+import { calculateEditorVideoPrice } from '../image-editor/ImageCanvasGenerationModel';
 import { buildCreationShowcaseItems } from './creationShowcaseModel';
 
 function createResource(
@@ -544,6 +545,34 @@ describe('creationShowcaseModel', () => {
     expect(items[0]?.cost).toBe('5泥点');
   });
 
+  it('infers video cost from the duration field instead of legacy top-level metadata', () => {
+    const items = buildCreationShowcaseItems({
+      activeTab: 'all',
+      projectResources: [
+        createResource({
+          resourceId: 'video-1',
+          label: '角色宣传片',
+          assetKind: 'video',
+          imageSrc: '/generated-editor-videos/video.mp4',
+          model: 'seedance2.0-fast',
+          generationInputs: {
+            fields: [
+              { title: '清晰度', value: '720p' },
+              { title: '时长', value: '6秒' },
+            ],
+            references: [],
+            durationSeconds: 4,
+          },
+        }),
+      ],
+    });
+
+    expect(items).toHaveLength(1);
+    expect(items[0]?.cost).toBe(
+      `${calculateEditorVideoPrice('seedance2.0-fast', '720p', 6)}泥点`,
+    );
+  });
+
   it('keeps character animation videos out of the marketing tab', () => {
     const items = buildCreationShowcaseItems({
       activeTab: 'marketing',
diff --git a/src/components/creation-home/creationShowcaseModel.ts b/src/components/creation-home/creationShowcaseModel.ts
index e8bda3013..ef6d05c8a 100644
--- a/src/components/creation-home/creationShowcaseModel.ts
+++ b/src/components/creation-home/creationShowcaseModel.ts
@@ -819,7 +819,7 @@ function inferAssetCost(asset: EditorAssetSnapshot) {
       inferVideoResolution(asset, ['480p', '720p', '1080p'], '480p') as
         '480p' | '720p' | '1080p',
       normalizeInt(
-        asset.generationInputs?.durationSeconds,
+        inferMediaDurationSeconds(asset),
         DEFAULT_VIDEO_DURATION_SECONDS,
         4,
         15,
@@ -832,6 +832,15 @@ function inferAssetCost(asset: EditorAssetSnapshot) {
   return null;
 }
 
+function inferMediaDurationSeconds(asset: EditorAssetSnapshot) {
+  const durationField = asset.generationInputs?.fields.find((field) => {
+    const title = field.title.trim().toLowerCase();
+    return title === '时长' || title === 'duration';
+  });
+  const matchedValue = durationField?.value.match(/\d+(?:\.\d+)?/u)?.[0];
+  return matchedValue ? Number(matchedValue) : undefined;
+}
+
 function inferVideoResolution(
   asset: EditorAssetSnapshot,
   allowedValues: string[],
diff --git a/src/components/image-editor/ImageCanvasEditorModel.test.ts b/src/components/image-editor/ImageCanvasEditorModel.test.ts
index dd897d021..3161c3190 100644
--- a/src/components/image-editor/ImageCanvasEditorModel.test.ts
+++ b/src/components/image-editor/ImageCanvasEditorModel.test.ts
@@ -737,7 +737,7 @@ describe('ImageCanvasEditorModel', () => {
     });
   });
 
-  it('hydrates audio media type and sound effect asset kind from saved layout', () => {
+  it('hydrates audio display duration only from resource generation inputs', () => {
     const hydrated = hydrateLayer(
       {
         layerId: 'layer-audio',
@@ -753,13 +753,16 @@ describe('ImageCanvasEditorModel', () => {
         sourceType: 'generated',
         mediaType: 'audio',
         assetKind: 'sound-effect',
-        durationSeconds: 3.5,
       },
       new Map([
         [
           'resource-audio',
           {
             imageSrc: '/generated-character-drafts/editor-audios/sfx.mp3',
+            generationInputs: {
+              fields: [{ title: '时长', value: '3.5秒' }],
+              references: [],
+            },
           },
         ],
       ]),
@@ -770,8 +773,12 @@ describe('ImageCanvasEditorModel', () => {
       src: '/generated-character-drafts/editor-audios/sfx.mp3',
       mediaType: 'audio',
       assetKind: 'sound-effect',
-      durationSeconds: 3.5,
+      generationInputs: {
+        fields: [{ title: '时长', value: '3.5秒' }],
+        references: [],
+      },
     });
+    expect(hydrated).not.toHaveProperty('durationSeconds');
   });
 
   it('hydrates character animation sequence fields from the project resource', () => {
diff --git a/src/components/image-editor/ImageCanvasEditorModel.ts b/src/components/image-editor/ImageCanvasEditorModel.ts
index 2bc6743b6..d771a3b3d 100644
--- a/src/components/image-editor/ImageCanvasEditorModel.ts
+++ b/src/components/image-editor/ImageCanvasEditorModel.ts
@@ -205,7 +205,6 @@ export function createLayerFromAsset(
     objectKey: asset.objectKey,
     assetObjectId: asset.assetObjectId,
     sourceResourceId: asset.sourceResourceId,
-    durationSeconds: asset.durationSeconds,
     sourceAssetId: asset.id,
     resourceAssetKind: asset.assetKind ?? assetKind ?? null,
     assetKindOverride: null,
@@ -335,7 +334,6 @@ export function serializeLayer(layer: CanvasLayer): EditorProjectLayerSnapshot {
           taskId: layer.taskId,
           objectKey: layer.objectKey,
           assetObjectId: layer.assetObjectId,
-          durationSeconds: layer.durationSeconds,
           sourceResourceId: layer.sourceResourceId,
           sourceAssetId: layer.sourceAssetId,
         }),
@@ -875,10 +873,6 @@ export function hydrateLayer(
       ? stringOrNull(resource?.assetObjectId)
       : (stringOrNull(snapshot.assetObjectId) ??
         stringOrNull(resource?.assetObjectId)),
-    durationSeconds: isFormalCharacterAnimation
-      ? undefined
-      : (audioDurationOrNull(snapshot.durationSeconds) ??
-        audioDurationOrNull(resource?.durationSeconds)),
     imageSequenceDurationMs,
     sourceResourceId: isFormalCharacterAnimation
       ? stringOrNull(resource?.sourceResourceId)
@@ -1207,7 +1201,6 @@ export type CanvasLayerResourceMetadata = {
   width?: number | null;
   height?: number | null;
   sourceType?: string | null;
-  durationSeconds?: number | null;
   imageSequenceDurationMs?: number | null;
   sourceResourceId?: string | null;
   assetKind?: string | null;
diff --git a/src/components/image-editor/ImageCanvasEditorTypes.ts b/src/components/image-editor/ImageCanvasEditorTypes.ts
index 58aabd324..1cb365452 100644
--- a/src/components/image-editor/ImageCanvasEditorTypes.ts
+++ b/src/components/image-editor/ImageCanvasEditorTypes.ts
@@ -60,7 +60,6 @@ export type EditorAsset = {
   showcaseSubmitError?: string | null;
   assetKind?: CanvasAssetKind | null;
   generationInputs?: CanvasGenerationInputs | null;
-  durationSeconds?: number;
   imageSequenceFrames?: EditorImageSequenceFrameResult[];
   imageSequenceDurationMs?: number;
   uploadStatus?: 'uploading' | 'failed';
@@ -117,7 +116,6 @@ export type CanvasLayer = {
   assetKindOverride?: CanvasAssetKind | null;
   assetKind?: CanvasAssetKind | null;
   generationInputs?: CanvasGenerationInputs | null;
-  durationSeconds?: number;
   imageSequenceFrames?: EditorImageSequenceFrameResult[];
   imageSequenceDurationMs?: number;
   previewVideoPath?: string | null;
diff --git a/src/components/image-editor/ImageCanvasEditorView.test.tsx b/src/components/image-editor/ImageCanvasEditorView.test.tsx
index 4a0f3d842..fe1736a0d 100644
--- a/src/components/image-editor/ImageCanvasEditorView.test.tsx
+++ b/src/components/image-editor/ImageCanvasEditorView.test.tsx
@@ -1451,7 +1451,7 @@ describe('ImageCanvasEditorView', () => {
             fields: [
               { title: '音效提示词', value: '金币跳出音' },
               { title: 'model', value: 'audio1.0' },
-              { title: 'duration', value: '8秒' },
+              { title: '时长', value: '8秒' },
             ],
             references: [
               {
diff --git a/src/components/image-editor/ImageCanvasExportModel.test.ts b/src/components/image-editor/ImageCanvasExportModel.test.ts
index b0421ff38..6b65316a1 100644
--- a/src/components/image-editor/ImageCanvasExportModel.test.ts
+++ b/src/components/image-editor/ImageCanvasExportModel.test.ts
@@ -194,7 +194,7 @@ describe('ImageCanvasExportModel', () => {
             },
             { title: '用户输入', value: '用户填写的视觉要求' },
             { title: '游戏分类', value: '游戏音效' },
-            { title: 'duration', value: '5秒' },
+            { title: '时长', value: '5秒' },
             { title: '处理模型', value: 'birefnet' },
           ],
           references: [],
@@ -207,7 +207,7 @@ describe('ImageCanvasExportModel', () => {
       fields: [
         { title: '用户输入', value: '用户填写的视觉要求' },
         { title: '游戏分类', value: '游戏音效' },
-        { title: 'duration', value: '5秒' },
+        { title: '时长', value: '5秒' },
       ],
       references: [],
     });
diff --git a/src/components/image-editor/ImageCanvasExportModel.ts b/src/components/image-editor/ImageCanvasExportModel.ts
index 32b280f68..48a203845 100644
--- a/src/components/image-editor/ImageCanvasExportModel.ts
+++ b/src/components/image-editor/ImageCanvasExportModel.ts
@@ -12,7 +12,6 @@ import {
   isEditorUserVisibleGenerationInputField,
   UI_DESIGN_ASSET_EXTRACTION_PROMPT,
 } from './ImageCanvasGenerationModel';
-import { formatCanvasDurationMetric } from './ImageCanvasMediaModel';
 
 export function sanitizeExportFilePart(value: string, fallback: string) {
   const safeValue = value
@@ -563,20 +562,12 @@ export function buildLayerVisibleExportMetadata(layer: CanvasLayer) {
     object: layer.objectKey ?? layer.assetObjectId ?? '-',
   };
 
-  if (layer.mediaType === 'audio') {
-    return {
-      ...base,
-      duration: formatCanvasDurationMetric(layer.durationSeconds).replace(
-        /^时长\s*/u,
-        '',
-      ),
-    };
-  }
-
-  return {
-    ...base,
-    resolution: `${layer.originalWidth} x ${layer.originalHeight} px`,
-  };
+  return layer.mediaType === 'audio'
+    ? base
+    : {
+        ...base,
+        resolution: `${layer.originalWidth} x ${layer.originalHeight} px`,
+      };
 }
 
 export function buildLayerExportMetadata(
diff --git a/src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts b/src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts
index c568371b7..4ebf99fa6 100644
--- a/src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts
+++ b/src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts
@@ -292,7 +292,7 @@ describe('ImageCanvasGenerationDialogModel', () => {
         fields: [
           { title: 'prompt', value: '金币收集音' },
           { title: 'model', value: 'audio1.0' },
-          { title: 'duration', value: '7秒' },
+          { title: '时长', value: '7秒' },
         ],
         references: [],
       },
@@ -361,7 +361,7 @@ describe('ImageCanvasGenerationDialogModel', () => {
           title: '游戏背景音乐',
           prompt: '【系统内置】完整背景音乐提示词',
           generationInputs: {
-            fields: [{ title: 'duration', value: '10秒' }],
+            fields: [{ title: '时长', value: '10秒' }],
             references: [],
           },
         }),
diff --git a/src/components/image-editor/ImageCanvasGenerationDialogModel.ts b/src/components/image-editor/ImageCanvasGenerationDialogModel.ts
index 6c8019b3b..d64d9afcb 100644
--- a/src/components/image-editor/ImageCanvasGenerationDialogModel.ts
+++ b/src/components/image-editor/ImageCanvasGenerationDialogModel.ts
@@ -529,7 +529,10 @@ function resolveAudioRedrawSoundModel(
 }
 
 function resolveAudioRedrawSoundDuration(sourceLayer: CanvasLayer) {
-  const fieldValue = findGenerationInputFieldValue(sourceLayer, ['duration']);
+  const fieldValue = findGenerationInputFieldValue(sourceLayer, [
+    '时长',
+    'duration',
+  ]);
   const matchedValue = fieldValue?.match(/\d+/u)?.[0];
   const duration = matchedValue ? Number.parseInt(matchedValue, 10) : null;
   if (!duration || !Number.isFinite(duration)) {
diff --git a/src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts b/src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts
index fbcb891c7..10e8464cd 100644
--- a/src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts
+++ b/src/components/image-editor/ImageCanvasGenerationLayerModel.test.ts
@@ -501,7 +501,10 @@ describe('ImageCanvasGenerationLayerModel', () => {
         originalHeight: 120,
       },
       generationInputs: {
-        fields: [{ title: 'prompt', value: '金币掉落叮当声' }],
+        fields: [
+          { title: 'prompt', value: '金币掉落叮当声' },
+          { title: '时长', value: '75秒' },
+        ],
         references: [],
       },
     });
@@ -526,11 +529,18 @@ describe('ImageCanvasGenerationLayerModel', () => {
       objectKey: 'generated-character-drafts/editor-audios/sfx.mp3',
       assetObjectId: 'assetobj-audio-1',
       sourceAssetId: 'asset-audio-bff',
-      durationSeconds: 75,
+      generationInputs: {
+        fields: [
+          { title: 'prompt', value: '金币掉落叮当声' },
+          { title: '时长', value: '75秒' },
+        ],
+        references: [],
+      },
       generatedAssetSnapshot: expect.objectContaining({
         assetId: 'asset-audio-bff',
       }),
     });
+    expect(layer).not.toHaveProperty('durationSeconds');
     expect(layer.provider).toBeUndefined();
   });
 
@@ -579,8 +589,8 @@ describe('ImageCanvasGenerationLayerModel', () => {
       objectKey: 'generated-character-drafts/editor-videos/video.mp4',
       assetObjectId: 'assetobj-video-1',
       thumbnailSrc: '/generated-character-drafts/editor-videos/cover.png',
-      durationSeconds: 5,
     });
+    expect(layer).not.toHaveProperty('durationSeconds');
     expect(layer.generatedAssetSnapshot?.assetId).toBe('asset-video-bff');
     expect(layer.provider).toBeUndefined();
   });
diff --git a/src/components/image-editor/ImageCanvasGenerationLayerModel.ts b/src/components/image-editor/ImageCanvasGenerationLayerModel.ts
index 55609bfc4..cdc1f7518 100644
--- a/src/components/image-editor/ImageCanvasGenerationLayerModel.ts
+++ b/src/components/image-editor/ImageCanvasGenerationLayerModel.ts
@@ -457,7 +457,6 @@ export function createVideoResultLayer({
     sourceAssetId: asset?.assetId,
     groupId: sourceLayer?.groupId,
     generationInputs: resource?.generationInputs ?? generationInputs,
-    durationSeconds: generated.durationSeconds,
     generatedAssetSnapshot: asset ?? generated.asset ?? undefined,
   };
 }
@@ -513,7 +512,6 @@ export function createAudioResultLayer({
     objectKey: resource?.objectKey ?? generated.objectKey,
     assetObjectId: resource?.assetObjectId ?? generated.assetObjectId,
     sourceAssetId: asset?.assetId,
-    durationSeconds: generated.durationSeconds ?? undefined,
     generationInputs: resource?.generationInputs ?? generationInputs,
     generatedAssetSnapshot: asset ?? undefined,
   };
diff --git a/src/components/image-editor/ImageCanvasGenerationModel.test.ts b/src/components/image-editor/ImageCanvasGenerationModel.test.ts
index 62b3f5beb..54522808f 100644
--- a/src/components/image-editor/ImageCanvasGenerationModel.test.ts
+++ b/src/components/image-editor/ImageCanvasGenerationModel.test.ts
@@ -546,7 +546,7 @@ describe('ImageCanvasGenerationModel', () => {
       fields: [
         { title: 'prompt', value: '金币掉落叮当声' },
         { title: 'model', value: 'audio1.0' },
-        { title: 'duration', value: '7秒' },
+        { title: '时长', value: '7秒' },
       ],
       references: [],
     });
diff --git a/src/components/image-editor/ImageCanvasGenerationModel.ts b/src/components/image-editor/ImageCanvasGenerationModel.ts
index b894ecef5..b734fed61 100644
--- a/src/components/image-editor/ImageCanvasGenerationModel.ts
+++ b/src/components/image-editor/ImageCanvasGenerationModel.ts
@@ -1031,6 +1031,7 @@ export function buildImageGenerationInputs(
 
 export function buildVideoGenerationInputs(
   prompt: string,
+  durationSeconds: number,
   references?: CharacterReferenceImage[],
 ): CanvasGenerationInputs {
   const mediaIndexes = {
@@ -1039,7 +1040,10 @@ export function buildVideoGenerationInputs(
     audio: 0,
   };
   return {
-    fields: createGenerationInputField('视频描述', prompt),
+    fields: [
+      ...createGenerationInputField('视频描述', prompt),
+      ...createGenerationInputField('时长', `${durationSeconds}秒`),
+    ],
     references: (references ?? []).flatMap((reference) => {
       const mediaType =
         reference.mediaType === 'video' || reference.mediaType === 'audio'
@@ -1066,7 +1070,7 @@ export function buildSoundEffectGenerationInputs(
     fields: [
       ...createGenerationInputField('prompt', prompt),
       ...createGenerationInputField('model', model),
-      ...createGenerationInputField('duration', `${duration}秒`),
+      ...createGenerationInputField('时长', `${duration}秒`),
     ],
     references: [],
   };
diff --git a/src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts b/src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts
index 1784b7056..4516acfe6 100644
--- a/src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts
+++ b/src/components/image-editor/ImageCanvasGenerationSubmissionModel.test.ts
@@ -851,6 +851,10 @@ describe('ImageCanvasGenerationSubmissionModel', () => {
       },
       result: {
         generationInputs: {
+          fields: [
+            { title: '视频描述', value: '根据参考生成角色宣传片' },
+            { title: '时长', value: '5秒' },
+          ],
           references: [
             {
               title: '参考图 1',
@@ -1031,7 +1035,7 @@ describe('ImageCanvasGenerationSubmissionModel', () => {
           fields: [
             { title: 'prompt', value: '金币掉落叮当声' },
             { title: 'model', value: 'audio1.0' },
-            { title: 'duration', value: '7秒' },
+            { title: '时长', value: '7秒' },
           ],
           references: [],
         },
@@ -1063,7 +1067,7 @@ describe('ImageCanvasGenerationSubmissionModel', () => {
           fields: [
             { title: 'prompt', value: '按钮确认短促音' },
             { title: 'model', value: 'audio1.0' },
-            { title: 'duration', value: '5秒' },
+            { title: '时长', value: '5秒' },
           ],
         },
       },
diff --git a/src/components/image-editor/ImageCanvasGenerationSubmissionModel.ts b/src/components/image-editor/ImageCanvasGenerationSubmissionModel.ts
index f33d4f55f..6c32c7c09 100644
--- a/src/components/image-editor/ImageCanvasGenerationSubmissionModel.ts
+++ b/src/components/image-editor/ImageCanvasGenerationSubmissionModel.ts
@@ -502,6 +502,7 @@ export function buildImageGenerationSubmissionPlan({
         ),
         generationInputs: buildVideoGenerationInputs(
           normalizedPrompt,
+          durationSeconds,
           dialog.generationReferences,
         ),
       },
diff --git a/src/components/image-editor/ImageCanvasMediaModel.ts b/src/components/image-editor/ImageCanvasMediaModel.ts
index 3eab66708..32e3923bb 100644
--- a/src/components/image-editor/ImageCanvasMediaModel.ts
+++ b/src/components/image-editor/ImageCanvasMediaModel.ts
@@ -1,33 +1,3 @@
-export function normalizeCanvasDurationSeconds(value: unknown) {
-  return typeof value === 'number' && Number.isFinite(value) && value > 0
-    ? value
-    : null;
-}
-
-export function formatCanvasDurationLabel(value: unknown) {
-  const durationSeconds = normalizeCanvasDurationSeconds(value);
-  if (durationSeconds === null) {
-    return '--:--';
-  }
-
-  const totalSeconds = Math.max(1, Math.round(durationSeconds));
-  const hours = Math.floor(totalSeconds / 3600);
-  const minutes = Math.floor((totalSeconds % 3600) / 60);
-  const seconds = totalSeconds % 60;
-  const paddedSeconds = String(seconds).padStart(2, '0');
-
-  if (hours > 0) {
-    return `${hours}:${String(minutes).padStart(2, '0')}:${paddedSeconds}`;
-  }
-
-  return `${minutes}:${paddedSeconds}`;
-}
-
-export function formatCanvasDurationMetric(value: unknown) {
-  // 中文注释：音频对象没有视觉分辨率语义，画布角标统一显示时长。
-  return `时长 ${formatCanvasDurationLabel(value)}`;
-}
-
 type MediaPreviewTone = 'audio' | 'video';
 
 type MediaPreviewMarker = {
diff --git a/src/components/image-editor/ImageCanvasMetadataModalView.test.tsx b/src/components/image-editor/ImageCanvasMetadataModalView.test.tsx
index 283468d8f..37b31d860 100644
--- a/src/components/image-editor/ImageCanvasMetadataModalView.test.tsx
+++ b/src/components/image-editor/ImageCanvasMetadataModalView.test.tsx
@@ -224,7 +224,7 @@ describe('ImageCanvasMetadataModalView', () => {
     expect(onClose).toHaveBeenCalledTimes(1);
   });
 
-  it('renders generated audio metadata with duration instead of resolution', () => {
+  it('renders audio duration from generation inputs instead of layer metadata', () => {
     render(
       <ImageCanvasMetadataModalView
         layer={createLayer({
@@ -236,9 +236,11 @@ describe('ImageCanvasMetadataModalView', () => {
           originalHeight: 120,
           model: 'suno',
           taskId: 'audio-task-75',
-          durationSeconds: 75,
           generationInputs: {
-            fields: [{ title: '音乐描述', value: '紧张的地下城循环音乐' }],
+            fields: [
+              { title: '音乐描述', value: '紧张的地下城循环音乐' },
+              { title: '时长', value: '75秒' },
+            ],
             references: [],
           },
         })}
@@ -253,7 +255,7 @@ describe('ImageCanvasMetadataModalView', () => {
     expect(within(dialog).getByText('音乐描述')).toBeTruthy();
     expect(within(dialog).getByText('紧张的地下城循环音乐')).toBeTruthy();
     expect(within(dialog).getByText('时长')).toBeTruthy();
-    expect(within(dialog).getByText('1:15')).toBeTruthy();
+    expect(within(dialog).getByText('75秒')).toBeTruthy();
     expect(within(dialog).queryByText('Resolution')).toBeNull();
     expect(within(dialog).queryByText('420 x 120 px')).toBeNull();
   });
diff --git a/src/components/image-editor/ImageCanvasMetadataModalView.tsx b/src/components/image-editor/ImageCanvasMetadataModalView.tsx
index d0fb16e55..09f17b62d 100644
--- a/src/components/image-editor/ImageCanvasMetadataModalView.tsx
+++ b/src/components/image-editor/ImageCanvasMetadataModalView.tsx
@@ -6,7 +6,6 @@ import {
   getEditorLayerModelDisplayName,
   isEditorUserVisibleGenerationInputField,
 } from './ImageCanvasGenerationModel';
-import { formatCanvasDurationMetric } from './ImageCanvasMediaModel';
 
 export type ImageCanvasMetadataModalViewProps = {
   layer: CanvasLayer | null;
@@ -17,13 +16,6 @@ function formatReferenceType(refType: 'project-resource' | 'asset') {
   return refType === 'project-resource' ? '项目资源' : '素材';
 }
 
-function formatLayerDurationForDisplay(layer: CanvasLayer) {
-  return formatCanvasDurationMetric(layer.durationSeconds).replace(
-    /^时长\s*/u,
-    '',
-  );
-}
-
 export function ImageCanvasMetadataModalView({
   layer,
   onClose,
@@ -104,19 +96,14 @@ export function ImageCanvasMetadataModalView({
           <dd>
             {getEditorLayerModelDisplayName(layer.model)}
           </dd>
-          {layer.mediaType === 'audio' ? (
-            <>
-              <dt>时长</dt>
-              <dd>{formatLayerDurationForDisplay(layer)}</dd>
-            </>
-          ) : (
+          {layer.mediaType !== 'audio' ? (
             <>
               <dt>Resolution</dt>
               <dd>
                 {layer.originalWidth} x {layer.originalHeight} px
               </dd>
             </>
-          )}
+          ) : null}
           <dt>Task</dt>
           <dd>{formatTaskIdForDisplay(layer.taskId)}</dd>
         </dl>
diff --git a/src/components/image-editor/ImageCanvasUploadModel.test.ts b/src/components/image-editor/ImageCanvasUploadModel.test.ts
index 327fbf57f..e42ad2e25 100644
--- a/src/components/image-editor/ImageCanvasUploadModel.test.ts
+++ b/src/components/image-editor/ImageCanvasUploadModel.test.ts
@@ -14,6 +14,7 @@ import {
   applyUploadAssetReadFailure,
   applyUploadAssetReadSuccess,
   bindUploadLayerToPersistedAsset,
+  buildUploadedMediaGenerationInputs,
   createUploadCanvasLayer,
   createUploadedGenerationReference,
   createUploadingAssetPlaceholder,
@@ -539,6 +540,7 @@ describe('ImageCanvasUploadModel', () => {
       fileName: '画布视频.mp4',
       imageSrc: '/generated/video.mp4',
       mediaType: 'video',
+      durationSeconds: 4.25,
       imageDimensions: { width: 1280, height: 720 },
       canvasPoint: { x: 110, y: 120 },
       canvasSize: { width: 900, height: 640 },
@@ -555,7 +557,19 @@ describe('ImageCanvasUploadModel', () => {
       height: 720,
       originalWidth: 1280,
       originalHeight: 720,
+      generationInputs: {
+        fields: [{ title: '时长', value: '4.25秒' }],
+        references: [],
+      },
     });
+    expect(layer).not.toHaveProperty('durationSeconds');
+  });
+
+  it('omits invalid or image durations from uploaded media metadata', () => {
+    expect(buildUploadedMediaGenerationInputs('image', 4)).toBeUndefined();
+    expect(
+      buildUploadedMediaGenerationInputs('audio', Number.NaN),
+    ).toBeUndefined();
   });
 
   it('uses viewport center fallback for invalid upload points', () => {
diff --git a/src/components/image-editor/ImageCanvasUploadModel.ts b/src/components/image-editor/ImageCanvasUploadModel.ts
index d87f810c9..ed6b26e71 100644
--- a/src/components/image-editor/ImageCanvasUploadModel.ts
+++ b/src/components/image-editor/ImageCanvasUploadModel.ts
@@ -1,6 +1,7 @@
 import { resolvePreferredAssetUploadFolder } from './ImageCanvasAssetLibraryModel';
 import { resolveLayerResolutionSize } from './ImageCanvasEditorModel';
 import type {
+  CanvasGenerationInputs,
   CanvasLayer,
   CanvasMediaType,
   CanvasViewport,
@@ -26,6 +27,7 @@ type PersistedUploadAsset = {
   height: number;
   objectKey?: string | null;
   assetObjectId?: string | null;
+  generationInputs?: CanvasGenerationInputs | null;
 };
 type GenerationReferenceUploadTarget =
   | 'character-reference'
@@ -436,6 +438,8 @@ export function applyPersistedUploadAsset({
           height: persistedAsset.height,
           objectKey: persistedAsset.objectKey ?? undefined,
           assetObjectId: persistedAsset.assetObjectId ?? undefined,
+          generationInputs:
+            persistedAsset.generationInputs ?? asset.generationInputs,
           persisted: true,
           uploadStatus: undefined,
           uploadProgress: undefined,
@@ -529,6 +533,25 @@ export function normalizeUploadScreenPoint({
   };
 }
 
+export function buildUploadedMediaGenerationInputs(
+  mediaType: CanvasMediaType,
+  durationSeconds: number | undefined,
+): CanvasGenerationInputs | undefined {
+  if (
+    mediaType === 'image' ||
+    typeof durationSeconds !== 'number' ||
+    !Number.isFinite(durationSeconds) ||
+    durationSeconds <= 0
+  ) {
+    return undefined;
+  }
+  const roundedDurationSeconds = Math.round(durationSeconds * 1_000) / 1_000;
+  return {
+    fields: [{ title: '时长', value: `${roundedDurationSeconds}秒` }],
+    references: [],
+  };
+}
+
 export function createUploadCanvasLayer({
   uploadIndex,
   fileName,
@@ -591,7 +614,10 @@ export function createUploadCanvasLayer({
     sourceAssetId: `upload-${uploadIndex}`,
     objectKey: objectKey ?? undefined,
     assetObjectId: assetObjectId ?? undefined,
-    durationSeconds,
+    generationInputs: buildUploadedMediaGenerationInputs(
+      mediaType,
+      durationSeconds,
+    ),
   };
 }
 
diff --git a/src/components/image-editor/ImageCanvasWorldView.test.tsx b/src/components/image-editor/ImageCanvasWorldView.test.tsx
index a32b06b31..44633ba3e 100644
--- a/src/components/image-editor/ImageCanvasWorldView.test.tsx
+++ b/src/components/image-editor/ImageCanvasWorldView.test.tsx
@@ -900,7 +900,10 @@ describe('ImageCanvasWorldView', () => {
       originalWidth: 420,
       originalHeight: 120,
       prompt: '紧张的地下城循环音乐',
-      durationSeconds: 75,
+      generationInputs: {
+        fields: [{ title: '时长', value: '75秒' }],
+        references: [],
+      },
     });
     const { props, rerender } = renderWorldView({
       layers: [layer],
@@ -948,6 +951,20 @@ describe('ImageCanvasWorldView', () => {
 
     const hoveredAudio =
       within(hoveredLayerButton).getByLabelText('画布音频：游戏背景音乐');
+    const progress = within(hoveredLayerButton).getByLabelText(
+      '调整游戏背景音乐播放进度',
+    ) as HTMLInputElement;
+    expect(progress.disabled).toBe(true);
+    expect(progress.max).toBe('0');
+
+    Object.defineProperty(hoveredAudio, 'duration', {
+      configurable: true,
+      value: 90,
+    });
+    fireEvent.loadedMetadata(hoveredAudio);
+    expect(progress.disabled).toBe(false);
+    expect(progress.max).toBe('90');
+
     fireEvent.play(hoveredAudio);
     expect(
       within(hoveredLayerButton)
@@ -973,7 +990,6 @@ describe('ImageCanvasWorldView', () => {
       height: 120,
       originalWidth: 420,
       originalHeight: 120,
-      durationSeconds: 12,
     });
     const { props } = renderWorldView({
       layers: [layer],
diff --git a/src/components/image-editor/ImageCanvasWorldView.tsx b/src/components/image-editor/ImageCanvasWorldView.tsx
index 353128f10..dcfc3f2ba 100644
--- a/src/components/image-editor/ImageCanvasWorldView.tsx
+++ b/src/components/image-editor/ImageCanvasWorldView.tsx
@@ -364,14 +364,6 @@ function getAudioLayerIcon(layer: CanvasLayer) {
   );
 }
 
-function getAudioDurationSeconds(durationSeconds: CanvasLayer['durationSeconds']) {
-  return typeof durationSeconds === 'number' &&
-    Number.isFinite(durationSeconds) &&
-    durationSeconds > 0
-    ? durationSeconds
-    : 0;
-}
-
 function formatAudioControlTime(seconds: number) {
   if (!Number.isFinite(seconds) || seconds <= 0) {
     return '0:00';
@@ -402,21 +394,20 @@ function ImageCanvasAudioLayerCard({
     refreshKey: layer.taskId ?? layer.resourceId,
   });
   const prompt = layer.prompt?.trim();
-  const fallbackDuration = getAudioDurationSeconds(layer.durationSeconds);
   const [currentTime, setCurrentTime] = useState(0);
-  const [duration, setDuration] = useState(fallbackDuration);
+  const [duration, setDuration] = useState(0);
   const [volume, setVolume] = useState(1);
   const [isMuted, setIsMuted] = useState(false);
   const showPlaybackButton = isPlaying || isHovered;
-  const controlDuration = duration > 0 ? duration : fallbackDuration;
+  const controlDuration = duration > 0 ? duration : 0;
   const safeCurrentTime =
     controlDuration > 0 ? Math.min(currentTime, controlDuration) : 0;
 
   useEffect(() => {
     setIsPlaying(false);
     setCurrentTime(0);
-    setDuration(fallbackDuration);
-  }, [fallbackDuration, layer.src]);
+    setDuration(0);
+  }, [layer.src]);
 
   const togglePlayback = async () => {
     const audio = audioRef.current;
@@ -519,7 +510,7 @@ function ImageCanvasAudioLayerCard({
             setDuration(
               Number.isFinite(nextDuration) && nextDuration > 0
                 ? nextDuration
-                : fallbackDuration,
+                : 0,
             );
           }}
           onTimeUpdate={(event) => setCurrentTime(event.currentTarget.currentTime)}
diff --git a/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx b/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx
index e5853d598..979eb8bcf 100644
--- a/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx
+++ b/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx
@@ -322,7 +322,7 @@ function SubmissionWorkflowHarness({
         {layers
           .map(
             (layer) =>
-              `${layer.id}:${layer.title}:${layer.sourceResourceId ?? '-'}:${layer.assetKind ?? '-'}:${layer.mediaType ?? '-'}:${layer.src}:${layer.thumbnailSrc ?? '-'}:${layer.imageSequenceDurationMs ?? layer.durationSeconds ?? '-'}`,
+              `${layer.id}:${layer.title}:${layer.sourceResourceId ?? '-'}:${layer.assetKind ?? '-'}:${layer.mediaType ?? '-'}:${layer.src}:${layer.thumbnailSrc ?? '-'}:${layer.imageSequenceDurationMs ?? '-'}`,
           )
           .join('|')}
       </span>
diff --git a/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.ts b/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.ts
index 2862f76bd..99bf71319 100644
--- a/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.ts
+++ b/src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.ts
@@ -1486,6 +1486,7 @@ export function useImageCanvasGenerationSubmissionWorkflow({
         );
         const generationInputs = buildVideoGenerationInputs(
           normalizedPrompt,
+          videoDurationSeconds,
           quickEditReferences,
         );
         const generated = await runEditorGenerationWithWalletRefresh(
diff --git a/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx b/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx
index a73718193..5e5a3ef76 100644
--- a/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx
+++ b/src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx
@@ -346,7 +346,7 @@ function GenerationWorkflowHarness({
                 fields: [
                   { title: 'prompt', value: '金币跳出音' },
                   { title: 'model', value: 'audio1.0' },
-                  { title: 'duration', value: '8秒' },
+                  { title: '时长', value: '8秒' },
                 ],
                 references: [],
               },
@@ -1237,7 +1237,7 @@ describe('useImageCanvasGenerationWorkflow', () => {
             fields: [
               { title: 'prompt', value: '金币跳出音' },
               { title: 'model', value: 'audio1.0' },
-              { title: 'duration', value: '8秒' },
+              { title: '时长', value: '8秒' },
             ],
             references: [],
           },
diff --git a/src/components/image-editor/useImageCanvasGenerationWorkflow.ts b/src/components/image-editor/useImageCanvasGenerationWorkflow.ts
index 461abed45..a368e9906 100644
--- a/src/components/image-editor/useImageCanvasGenerationWorkflow.ts
+++ b/src/components/image-editor/useImageCanvasGenerationWorkflow.ts
@@ -202,7 +202,6 @@ function createProjectLayerSnapshotFromLayer(
     mediaType: layer.mediaType,
     objectKey: layer.objectKey,
     assetObjectId: layer.assetObjectId,
-    durationSeconds: layer.durationSeconds,
   };
 }
 
diff --git a/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx b/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx
index befcdce41..0faeb4bf7 100644
--- a/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx
+++ b/src/components/image-editor/useImageCanvasUploadWorkflow.test.tsx
@@ -396,6 +396,7 @@ describe('useImageCanvasUploadWorkflow', () => {
       sourceType: input.sourceType,
       objectKey: 'object-key-uploaded',
       assetObjectId: 'asset-object-uploaded',
+      generationInputs: input.generationInputs,
     }));
     createEditorAssetFolderMock.mockResolvedValue({
       folderId: 'folder-uploaded',
@@ -666,6 +667,10 @@ describe('useImageCanvasUploadWorkflow', () => {
           label: '画布视频.mp4',
           width: 1280,
           height: 720,
+          generationInputs: {
+            fields: [{ title: '时长', value: '4秒' }],
+            references: [],
+          },
         }),
       );
     });
@@ -871,6 +876,10 @@ describe('useImageCanvasUploadWorkflow', () => {
         width: 560,
         height: 315,
         sourceType: 'uploaded',
+        generationInputs: {
+          fields: [{ title: '时长', value: '4秒' }],
+          references: [],
+        },
       }),
     );
     expect(createEditorAssetMock).not.toHaveBeenCalled();
@@ -912,6 +921,10 @@ describe('useImageCanvasUploadWorkflow', () => {
         width: 420,
         height: 120,
         sourceType: 'uploaded',
+        generationInputs: {
+          fields: [{ title: '时长', value: '4秒' }],
+          references: [],
+        },
       }),
     );
     expect(createEditorAssetMock).not.toHaveBeenCalled();
diff --git a/src/components/image-editor/useImageCanvasUploadWorkflow.ts b/src/components/image-editor/useImageCanvasUploadWorkflow.ts
index f23482737..4d44c901a 100644
--- a/src/components/image-editor/useImageCanvasUploadWorkflow.ts
+++ b/src/components/image-editor/useImageCanvasUploadWorkflow.ts
@@ -56,6 +56,7 @@ import {
   applyUploadAssetReadFailure,
   applyUploadAssetReadSuccess,
   bindUploadLayerToPersistedAsset,
+  buildUploadedMediaGenerationInputs,
   createUploadCanvasLayer,
   createUploadedGenerationReference,
   createUploadingAssetPlaceholder,
@@ -207,6 +208,10 @@ export function useImageCanvasUploadWorkflow({
       const width = imageDimensions?.width ?? fallbackSize.width;
       const height = imageDimensions?.height ?? fallbackSize.height;
       const assetKind = resolveUploadedAssetKind(resolvedMediaType);
+      const generationInputs = buildUploadedMediaGenerationInputs(
+        resolvedMediaType,
+        durationSeconds,
+      );
       if (projectId) {
         const resource = await createEditorProjectResource(projectId, {
           imageSrc: persistedImageSrc,
@@ -218,6 +223,7 @@ export function useImageCanvasUploadWorkflow({
           height,
           sourceType: 'uploaded',
           assetKind,
+          generationInputs,
         });
         return createUploadedGenerationReference({
           idPrefix,
@@ -251,6 +257,7 @@ export function useImageCanvasUploadWorkflow({
         height,
         sourceType: 'uploaded',
         assetKind,
+        generationInputs,
       });
       return createUploadedGenerationReference({
         idPrefix,
@@ -1049,6 +1056,7 @@ export function useImageCanvasUploadWorkflow({
         height: uploadedAsset.height,
         sourceType: 'uploaded',
         assetKind: nextLayer.assetKind,
+        generationInputs: nextLayer.generationInputs,
       })
         .then((asset) => {
           const persistedAssetWithPreview = {