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• avformat/hlsenc : save the EXT-X-DISCONTINUITY from old list

  7 décembre 2016, par Steven Liu

  avformat/hlsenc : save the EXT-X-DISCONTINUITY from old list
  when use fix ticket 2nd problem.
  command line test step :
  
  rm -rf output* ;./ffmpeg  -i /Movies/objectC/facebook.mp4 -an -c:v copy
  
   f hls -hls_time 4 -hls_list_size 5 -hls_flags +delete_segments
  
   hls_flags +append_list -hls_flags +omit_endlist -hls_flags
  
  +discont_start -t 50 output.m3u8
  
  ./ffmpeg -i /Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls
  
   hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
  
  +append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
  
  output.m3u8
  
  ./ffmpeg -i /Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls
  
   hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
  
  +append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
  
  output.m3u8
  result :
  
   #EXTM3U
  
   #EXT-X-VERSION:3
  
   #EXT-X-TARGETDURATION:5
  
   #EXT-X-MEDIA-SEQUENCE:6
  
   #EXTINF:4.120000,
  
   output6.ts
  
   #EXT-X-DISCONTINUITY
  
   #EXTINF:4.000000,
  
   output7.ts
  
   #EXTINF:0.960000,
  
   output8.ts
  
   #EXT-X-DISCONTINUITY
  
   #EXTINF:4.000000,
  
   output9.ts
  
   #EXTINF:0.960000,
  
   output10.ts
  Signed-off-by : Steven Liu <lq@chinaffmpeg.org>
  

  • [DH] libavformat/hlsenc.c

• ffmpeg reconnect to rtmp output if error

  27 avril 2017, par boygiandi

  I’m trying to livestream to facebook, it’s fine but sometime it got error and stop the stream

  [ sh : 2017-04-27 10:31:34 ]size= 296042kB time=00:13:04.48 bitrate=3091.4kbits/s speed= 1x

  [ sh : 2017-04-27 10:31:35 ]size= 296605kB time=00:13:05.48 bitrate=3093.4kbits/s speed= 1x

  [ sh : 2017-04-27 10:31:36 ]size= 296928kB time=00:13:06.50 bitrate=3092.7kbits/s speed= 1x

  [ sh : 2017-04-27 10:31:37 ]size= 297259kB time=00:13:07.48 bitrate=3092.3kbits/s speed= 1x

  [flv @ 0x32c91e0] Failed to update header with correct duration.

  [flv @ 0x32c91e0] Failed to update header with correct filesize.
  frame=23623 fps= 30 q=13.0 Lsize= 297346kB time=00:13:07.52 bitrate=3093.0kbits/s speed= 1x

  video:284080kB audio:12242kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : 0.345891%

  [libx264 @ 0x3294c80] frame I:394 Avg QP:10.66 size : 99956

  [libx264 @ 0x3294c80] frame P:23229 Avg QP:13.94 size : 10828

  [libx264 @ 0x3294c80] mb I I16..4 : 100.0% 0.0% 0.0%

  [libx264 @ 0x3294c80] mb P I16..4 : 2.8% 0.0% 0.0% P16..4 : 34.9% 0.0% 0.0% 0.0% 0.0% skip:62.2%

  [libx264 @ 0x3294c80] coded y,uvDC,uvAC intra : 64.8% 69.3% 44.6% inter : 20.5% 16.6% 4.2%

  [libx264 @ 0x3294c80] i16 v,h,dc,p : 27% 51% 12% 10%

  [libx264 @ 0x3294c80] i8c dc,h,v,p : 34% 40% 16% 10%

  [libx264 @ 0x3294c80] kb/s:2955.27

  [aac @ 0x33825e0] Qavg : 1929.185

  I have no idea why it stopped, but is there any option to ignore error and still livestream ? Or another way, re-stream again from beginning. When I tried to do that by run ffmpeg (after few seconds) command again. It said

  [rtmp @ 0x3c01420] Server error : Initialization failed (2 : Broadcast state is bad)

  rtmp ://rtmp-api.facebook.com:80/rtmp/1658103677537416 ?ds=1&s_l=1&a=ATjLWmaYE8qulMzm : Operation not permitted

  I can’t stream again to facebook rtmp url. Please help

• ffmpeg streaming simultaneously synchronized delay to multiple social networks

  4 avril 2021, par Jintor

  I'm able to stream simultaneously using ffmpeg to youtube, twitter, facebook, twitch ... simultaneously BUT the issue is the following : each network have their own delay

  


  in 1 network : 15 seconds delay, an other : 10 seconds delay, etc

  


  I tried 2 different ways

  


  • 1 ffmpeg per network => Signal is strong and stable

  


  • 1 ffmpeg with tee muxer to many at once => horrible, unstable, 1 network accepts it and some other says signal poor or too low bitrate...

  


  ----------- for example I use this for each social network ------------------------------

  


  /usr/bin/ffmpeg -re -i input.mp4 -deinterlace -c:v libx264 -pix_fmt yuv420p 
-preset veryfast -tune zerolatency -c:a aac -b:a 128k -ac 2 -crf 18 -r 30 -g 60  
-b:v 2369k -minrate 2369k -maxrate 2369k -ar 44100 -qscale:v 2 -vf "scale=-2:1080" 
-profile:v main -bufsize 2369k -f flv "rtmp://a.rtmp.youtube.com/live2/key"


  


  ---

  


  


  • I know that it's a case by case basis and not easy to do, but Is there a way to "fake" a delay with ffmpeg (like youtube->x delay, facebook-> y delay, etc) ?

    


  


  • or is there any synchronizing mechanism or timing option in ffmpeg ?

    


  


  • or any other approach ?