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fix: use snake_case field names matching Bilibili DASH API response

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B站 API 实际返回 segment_base.initialization / index_range
而非 segmentBase.Initialization / indexRange，修正类型定义和 MPD 生成逻辑。
segment_base 设为可选，缺失时不生成 SegmentBase 元素（ExoPlayer fallback）。
This commit is contained in:
Developer
2026-03-10 20:09:50 +08:00
parent 5bb6a3cd68
commit 911eeb9052
2 changed files with 16 additions and 12 deletions
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8
services/types.ts
View File

@@ -35,8 +35,8 @@ export interface Comment {
} }
export interface DashSegmentBase { export interface DashSegmentBase {
Initialization: string; initialization: string;
indexRange: string; index_range: string;
} }
export interface DashVideoItem { export interface DashVideoItem {
@@ -48,7 +48,7 @@ export interface DashVideoItem {
width: number; width: number;
height: number; height: number;
frameRate: string; frameRate: string;
segmentBase: DashSegmentBase; segment_base?: DashSegmentBase;
} }
export interface DashAudioItem { export interface DashAudioItem {
@@ -57,7 +57,7 @@ export interface DashAudioItem {
bandwidth: number; bandwidth: number;
mimeType: string; mimeType: string;
codecs: string; codecs: string;
segmentBase: DashSegmentBase; segment_base?: DashSegmentBase;
} }
export interface PlayUrlResponse { export interface PlayUrlResponse {

20
utils/dash.ts
View File

@@ -15,6 +15,16 @@ export function buildDashDataUri(playData: PlayUrlResponse, qn: number): string
const dur = dash.duration; const dur = dash.duration;
const vSeg = video.segment_base;
const aSeg = audio.segment_base;
const videoSegmentBase = vSeg
? `\n <SegmentBase indexRange="${vSeg.index_range}">\n <Initialization range="${vSeg.initialization}"/>\n </SegmentBase>`
: '';
const audioSegmentBase = aSeg
? `\n <SegmentBase indexRange="${aSeg.index_range}">\n <Initialization range="${aSeg.initialization}"/>\n </SegmentBase>`
: '';
const xml = `<?xml version="1.0" encoding="UTF-8"?> const xml = `<?xml version="1.0" encoding="UTF-8"?>
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" <MPD xmlns="urn:mpeg:dash:schema:mpd:2011"
profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011"
@@ -23,18 +33,12 @@ export function buildDashDataUri(playData: PlayUrlResponse, qn: number): string
<Period duration="PT${dur}S"> <Period duration="PT${dur}S">
<AdaptationSet id="1" mimeType="${video.mimeType}" codecs="${video.codecs}" startWithSAP="1" subsegmentAlignment="true"> <AdaptationSet id="1" mimeType="${video.mimeType}" codecs="${video.codecs}" startWithSAP="1" subsegmentAlignment="true">
<Representation id="v1" bandwidth="${video.bandwidth}" width="${video.width}" height="${video.height}" frameRate="${video.frameRate}"> <Representation id="v1" bandwidth="${video.bandwidth}" width="${video.width}" height="${video.height}" frameRate="${video.frameRate}">
<BaseURL>${escapeXml(video.baseUrl)}</BaseURL> <BaseURL>${escapeXml(video.baseUrl)}</BaseURL>${videoSegmentBase}
<SegmentBase indexRange="${video.segmentBase.indexRange}">
<Initialization range="${video.segmentBase.Initialization}"/>
</SegmentBase>
</Representation> </Representation>
</AdaptationSet> </AdaptationSet>
<AdaptationSet id="2" mimeType="${audio.mimeType}" codecs="${audio.codecs}" startWithSAP="1" subsegmentAlignment="true"> <AdaptationSet id="2" mimeType="${audio.mimeType}" codecs="${audio.codecs}" startWithSAP="1" subsegmentAlignment="true">
<Representation id="a1" bandwidth="${audio.bandwidth}"> <Representation id="a1" bandwidth="${audio.bandwidth}">
<BaseURL>${escapeXml(audio.baseUrl)}</BaseURL> <BaseURL>${escapeXml(audio.baseUrl)}</BaseURL>${audioSegmentBase}
<SegmentBase indexRange="${audio.segmentBase.indexRange}">
<Initialization range="${audio.segmentBase.Initialization}"/>
</SegmentBase>
</Representation> </Representation>
</AdaptationSet> </AdaptationSet>
</Period> </Period>