What causes "baidu youth video dlink not found for %s" in AlistGo/alist?

Fall back to the standard locatedownload path when the dlink is missing

baidu youth video dlink not found for %s

Error message

baidu youth video dlink not found for %s

What it means

Returned by BaiduYouth.getMediaInfoDLink (drivers/baidu_youth/util.go:402): the streaming/video info endpoint (type=VideoURL, media=1) responded successfully but Info.Dlink was empty. I.e. Baidu knows about the file but did not hand out a video download link — usually because the file is not a recognized video or the account cannot stream it.

Source

Thrown at drivers/baidu_youth/util.go:402

		req.SetContext(ctx)
		req.SetQueryParams(map[string]string{
			"channel":    videoAPIChannel,
			"clienttype": "1",
			"devuid":     videoAPIDevUID,
			"dlink":      "1",
			"fs_id":      fileID,
			"media":      "1",
			"nom3u8":     "1",
			"origin":     "dlna",
			"path":       path,
			"type":       "VideoURL",
		})
	}, &resp)
	if err != nil {
		return "", err
	}
	if resp.Info.Dlink == "" {
		return "", fmt.Errorf("baidu youth video dlink not found for %s", path)
	}
	return resp.Info.Dlink, nil
}

func (d *BaiduYouth) buildVideoLink(ctx context.Context, file model.Obj) (*model.Link, error) {
	dlink, err := d.getMediaInfoDLink(ctx, file)
	if err != nil {
		return nil, err
	}
	return &model.Link{
		URL: dlink,
		Header: http.Header{
			"Referer": []string{panReferer},
		},
	}, nil
}

func (d *BaiduYouth) requestLocateDownloadURL(ctx context.Context, path string, fileID string, fileMD5 string, sk string) (string, error) {

View on GitHub (pinned to 843d9dc814)

Solutions

Fall back to the standard locatedownload path when the dlink is missing
Verify the file is actually a video (extension/mime) before choosing buildVideoLink
Retry later for freshly uploaded videos still transcoding

Example fix

// before
func (d *BaiduYouth) buildVideoLink(ctx context.Context, file model.Obj) (*model.Link, error) {
    dlink, err := d.getMediaInfoDLink(ctx, file)
    if err != nil { return nil, err }
    ...
}

// after
dlink, err := d.getMediaInfoDLink(ctx, file)
if err != nil {
    if strings.Contains(err.Error(), "video dlink not found") {
        return d.buildNormalLink(ctx, file) // locatedownload fallback
    }
    return nil, err
}

Defensive patterns

Strategy: fallback

Validate before calling

// prefer the media path only for likely-video objects
func isLikelyVideo(obj model.Obj) bool {
    ext := strings.ToLower(path.Ext(obj.GetName()))
    switch ext {
    case ".mp4", ".mkv", ".avi", ".mov", ".flv", ".ts", ".webm":
        return true
    }
    return false
}

Try / catch

dlink, err := d.getMediaInfoDLink(ctx, file)
if err != nil && strings.Contains(err.Error(), "video dlink not found") {
    // not streamable as video: fall back to the normal locatedownload flow
    return d.buildNormalLink(ctx, file)
}
if err != nil {
    return nil, err
}

Prevention

Gate the video path on file type/mime instead of trying it blindly
Retry media links later for freshly uploaded videos still transcoding
Keep the locatedownload fallback wired so missing dlinks degrade gracefully

When it happens

Trigger: buildVideoLink called for a non-video file; video not yet transcoded/available for streaming; media info blocked for the account or region.

Common situations: Driver falls back to the video path when locatedownload fails on media files; newly uploaded videos before transcoding completes; unsupported codecs.

Related errors

AI-assisted analysis of AlistGo/alist@843d9dc814 (2026-08-15). Data as JSON: /api/errors/622830c4d43229e3. Report an issue: GitHub.