hello, i use ffmpeg (4.1) to stream live hls using unified streamnig.
if in my abr encoding i mix baseline with main/high, live hls generated by unified (USP) would have #EXT-X-DISCONTINUITY on each segment : encoding : ffmpeg-y -re -i 'udp://239.255.255.1:21007?localaddr=127.0.0.1' \ -filter_complex "[0:v]yadif[prg]; [prg]unsharp=5:5:0.4:5:5:0.0,split=2[br1][br2]" -movflags isml+frag_keyframe -f ismv -threads 0 -ism_offset 15468673780000000 \ -c:a libfdk_aac -ac 2 -af 'aresample=async=1:min_hard_comp=0.100000:first_pts=0' -c:v libx264 -tune grain -g 50 -r 25 -keyint_min 50 -sc_threshold 0 \ -map '[br1]' -b:v:0 400k -s:v:0 426x240 -preset:v:0 superfast -profile:v:0 baseline -level:v:0 2.1 \ -map '[br2]' -b:v:1 800k -s:v:1 640x360 -preset:v:1 veryfast -profile:v:1 high -level:v:1 3.0 \ -map 0:a:0 -b:a 128k \ -metadata:s:a:0 language=fre ' http://usp_url/live_event/live_event.isml/Streams(video)' ============== m3u8 on 800k br: #EXTM3U #EXT-X-VERSION:3 ## Created with Unified Streaming Platform(version=1.7.25) #EXT-X-MEDIA-SEQUENCE:193358423 #EXT-X-INDEPENDENT-SEGMENTS #EXT-X-TARGETDURATION:8 #USP-X-TIMESTAMP-MAP:MPEGTS=994987456,LOCAL=2019-01-07T13:22:58Z #EXT-X-PROGRAM-DATE-TIME:2019-01-07T13:22:58Z #EXTINF:6.08, no desc #EXT-X-KEY:METHOD=AES-128,URI="https://usp_url/hls_aes.key"; smooth-audio_fre=128000-video=800000-193358423.ts #EXT-X-PROGRAM-DATE-TIME:2019-01-07T13:23:04.040000Z #EXT-X-DISCONTINUITY #EXTINF:8.04, no desc smooth-audio_fre=128000-video=800000-193358424.ts #EXT-X-PROGRAM-DATE-TIME:2019-01-07T13:23:12.040000Z #EXT-X-DISCONTINUITY #EXTINF:8.04, no desc smooth-audio_fre=128000-video=800000-193358425.ts ffmpeg screws it up pnly when baseline is involved, this one would get clean m3u8 : -map '[br1]' -b:v:0 400k -s:v:0 426x240 -preset:v:0 superfast -profile:v:0 main -level:v:0 2.1 ; -map '[br2]' -b:v:1 800k -s:v:1 640x360 -preset:v:1 veryfast -profile:v:1 high -level:v:1 3.0 ; #EXTM3U #EXT-X-VERSION:3 ## Created with Unified Streaming Platform(version=1.7.25) #EXT-X-MEDIA-SEQUENCE:193358423 #EXT-X-INDEPENDENT-SEGMENTS #EXT-X-TARGETDURATION:8 #USP-X-TIMESTAMP-MAP:MPEGTS=994994656,LOCAL=2019-01-07T13:22:58.080000Z #EXT-X-PROGRAM-DATE-TIME:2019-01-07T13:22:58.080000Z #EXTINF:6, no desc #EXT-X-KEY:METHOD=AES-128,URI="https://usp_url/hls_aes.key"; smooth-audio_fre=128000-video=800000-193358423.ts #EXTINF:8, no desc smooth-audio_fre=128000-video=800000-193358424.ts #EXTINF:8, no desc smooth-audio_fre=128000-video=800000-193358425.ts it's ffmpeg encoing issue, i've encoded the same, 2 bitrates with baseline & high, 30 secs with carbon and then used the ismv files as sources instead of udp multicast without trancoding, in this case no #EXT-X-DISCONTINUITY observed. i didn't delve into details with elecard, at unified they know the issue. it's not a tragedy for me, i would rather encode low bitrates with high anyway, but i'm curious, is it a know issue. i could comment out #EXT-X-DISCONTINUITY insertion and recompile ffmpeg to see if my live would still be steady, but why not to ask first , may be someone knows some option or particular way of encoding to fix this. cheers, &rei _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
