Playback issue with ffmpeg generated HLS stream (using fmp4 segments) on Chrome/Edge

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Hi All,

We’re trying to play an ffmpeg generated HLS stream on the latest Bitmovin player. All the settings used in ffmpeg are pretty standard: single bitrate, single media manifest file, fmp4 segments (.m4s files). The stream plays fine on Safari, but doesn’t play on Chrome/Edge. If we use MPEG-TS segments (.ts files) instead, then the problem goes away.

Has someone done something similar successfully on Chrome/Edge? It’ll be really helpful to learn others’ experience in this (either successful or not). Thanks.

p.s. codec used (avc1.640032 / mp4a.40.2 for video / audio)

2

Hi @spaek ,

I’ve reproduced the issue you described with a standard/default ffmpeg command and it seems the problem might come from not generating a separate video and audio chunklist like our demo stream. When generating those via below ffmpeg command, I get successful playback on our player: Bitmovin's Test Player » Try our HTML 5 Video Player Demo

ffmpeg -y \
  -i 1min.mp4 \
  -force_key_frames "expr:gte(t,n_forced*2)" \
  -c:v copy \
  -c:a copy \
  -hls_time 6 \
  -hls_flags independent_segments \
  -hls_playlist_type vod \
  -hls_segment_type fmp4 \
  -hls_segment_filename "fileSequence%d_%v.m4s" \
  -var_stream_map "v:0 a:0" prog_index_%v.m3u8

My master.m3u8 file looks like this:

#EXTM3U
#EXT-X-VERSION:6
#EXT-X-INDEPENDENT-SEGMENTS


#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",NAME="English stereo",LANGUAGE="en",AUTOSELECT=YES,URI="prog_index_1.m3u8"

#EXT-X-STREAM-INF:BANDWIDTH=628000,CODECS="avc1.4dc00d,mp4a.40.2",RESOLUTION=320x180,AUDIO="audio"
prog_index_0.m3u8

Could you give the above a try and share your results? Regards

3

Hi Alberto,

Thanks very much for looking into this and reproducing the issue. We’ll test again based on your suggestion and let you know how it goes.

Best regards.

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