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can't create dash manifest for audio only fragmented mp4 #3

@nickdesaulniers

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@nickdesaulniers

I have a fragmented mp4 file, but I can't create the dash manifest:

➜  mse  ~/Downloads/Bento4-SDK-1-4-2-589.universal-apple-macosx/bin/Release/mp4fragment --fragment-duration 30000 snowblind.mp4 snowblind-frag.mp4
➜  mse  ~/Downloads/Bento4-SDK-1-4-2-589.universal-apple-macosx/utils/mp4-dash.py --profiles=on-demand --use-segment-list snowblind-frag.mp4
Parsing media file 1: snowblind-frag.mp4
Extracting track 1 from snowblind-frag.mp4
no video track, cannot autodetect fragment duration
unable to detect fragment duration, using default
Parsing media file 1: tmpWeIW74 = Extracted[track 1 from snowblind-frag.mp4]
Processing and Copying media file tmpWeIW74 = Extracted[track 1 from snowblind-frag.mp4]

if (auto_detect_fragment_duration) {
if (video_track) {
fragment_duration = AutoDetectFragmentDuration(video_track);
} else {
if (Options.verbosity > 0) {
fprintf(stderr, "no video track, cannot autodetect fragment duration\n");
}
}

Is it possible to get the fragment duration from audio? Or am I doing something wrong?

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