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Align track starts at the relay so DASH output carries no video edit list #53

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Merged
roddylindsay merged 1 commit into from
Jul 22, 2026
Merged

Align track starts at the relay so DASH output carries no video edit list #53

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7 changes: 7 additions & 0 deletions nginx-transcoder/nginx-no-ssl.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,13 @@ rtmp {

application live {
live on;
# Start the exec'd transcoder's input at a keyframe with audio held
# until video flows, so both tracks begin together. Without these,
# the subscriber gets audio up to one GOP before decodable video and
# ffmpeg records that skew as a leading empty edit on the video
# track, which desyncs players that drop edit lists in MSE.
wait_key on;
wait_video on;
on_publish http://127.0.0.1/route_to_auth;
exec ffmpeg -analyzeduration 10M -i rtmp://127.0.0.1/live/$name -strict -2 -c:a libopus -mapping_family 255 ${FFMPEG_FLAGS} -f dash /opt/data/dash/$name.mpd 2>>/tmp/nginx_rtmp_ffmpeg_log;
}
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7 changes: 7 additions & 0 deletions nginx-transcoder/nginx.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,13 @@ rtmp {

application live {
live on;
# Start the exec'd transcoder's input at a keyframe with audio held
# until video flows, so both tracks begin together. Without these,
# the subscriber gets audio up to one GOP before decodable video and
# ffmpeg records that skew as a leading empty edit on the video
# track, which desyncs players that drop edit lists in MSE.
wait_key on;
wait_video on;
on_publish http://127.0.0.1/route_to_auth;
exec ffmpeg -analyzeduration 10M -i rtmp://127.0.0.1/live/$name -strict -2 -c:a libopus -mapping_family 255 ${FFMPEG_FLAGS} -f dash /opt/data/dash/$name.mpd 2>>/tmp/nginx_rtmp_ffmpeg_log;
}
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