barbibulle
commented
7 years ago In theory there's nothing that should prevent have HLS/fMP4 work with both audio and video fragments located in the same file. But since it is much easier to have one file per track (this way the tool does not have to recombine multiple tracks into a single file) that's the way the tool does it. But I do see the value in being able to use the file as a downloadable asset without having to re-assemble it on the fly when requested. I'll look into whether that would be easy to support in the toolset, and if it is I'll try to implement it.
On Mon, May 22, 2017 at 3:43 PM, Steffen Tiedemann Christensen < notifications@github.com> wrote:
I'm chasing the elusive goal on a single fMP4 file per rendition -- to be delivered either as progressive download, to HLS or to DASH.
Currently, this can be achieved for progressive and dash using mp4dash --no-split --hls ..., but the generated HLS manifest relies on mp4 files split for every track:
$ mp4dash --no-split --profiles=on-demand --hls video.fmp4 Parsing media file 1: video.fmp4 Extracting track 2 from video.fmp4 Extracting track 1 from video.fmp4 Parsing media file 1: tmp5j3pQA = Extracted[track 2 from video.fmp4] Parsing media file 2: tmpbwwPqS = Extracted[track 1 from video.fmp4] Processing and Copying media file tmp5j3pQA = Extracted[track 2 from video.fmp4] Processing and Copying media file tmpbwwPqS = Extracted[track 1 from video.fmp4] $ ls -al output/ 4096 May 23 00:38 . 4096 May 23 00:38 .. 415 May 23 00:38 master.m3u8 415 May 23 00:38 media-audio-en-mp4a.m3u8 274149 May 23 00:38 media-audio-en-mp4a.mp4 408 May 23 00:38 media-video-avc1.m3u8 1578452 May 23 00:38 media-video-avc1.mp4 1339 May 23 00:38 stream.mpd```
Is this due to an inherent constraint in how fragmented mp4s work with HLS, or are there any plans to support this for HLS as well?
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steffentchr
calvincorreli
I'm chasing the elusive goal on a single fMP4 file per rendition -- to be delivered either as progressive download, to HLS or to DASH.
Currently, this can be achieved for progressive and dash using
mp4dash --no-split --hls ..., but the generated HLS manifest relies on mp4 files split for every track:Is this due to an inherent constraint in how fragmented mp4s work with HLS, or are there any plans to support this for HLS as well?