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• FFmpeg creating multicast with multiple streams from one source (live source)

  1er mai 2018, par Netheme

  Hi :) I’m facing problems when creating multicast with multiple streams from one source (live source). The issue is that the encoding is slower than realtime. That is big issue for me as I’m processing live feed. The exact command and it’s output you can find here :

  Command

  ffmpeg -y -hwaccel cuvid -c:v h264_cuvid -vsync 0 -deint 2 -drop_second_field 1 -surfaces 10 -i 'udp://@239.10.150.2:5004?fifo_size=100000000&bitrate=12000000'  -map i:0xc77 -r:v:0 25 -filter:v:0 fps=25,scale_npp=640:360:format=same:interp_algo=lanczos -aspect:v:0 16:9 -g:v:0 80 -vcodec:v:0 h264_nvenc -b:v:0 400K -minrate:v:0 400k -maxrate:v:0 400k  -map i:0xc77 -r:v:1 25 -filter:v:1 fps=25,scale_npp=720:405:format=same:interp_algo=lanczos -aspect:v:1 16:9 -g:v:1 80 -vcodec:v:1 h264_nvenc -b:v:1 1000K -minrate:v:1 1000k -maxrate:v:1 1000k  -map i:0xc77 -r:v:2 25 -filter:v:2 fps=25,scale_npp=1280:720:format=same:interp_algo=lanczos -aspect:v:2 16:9 -g:v:2 80 -vcodec:v:2 h264_nvenc -b:v:2 2500K -minrate:v:2 2500K -maxrate:v:2 2500K  -map i:0xc77 -r:v:3 25 -filter:v:3 fps=25,scale_npp=1920:1080:format=same:interp_algo=lanczos -aspect:v:3 16:9 -g:v:3 80 -vcodec:v:3 h264_nvenc -b:v:3 4500K -minrate:v:3 4500K -maxrate:v:3 4500K  -map i:0xc7a -ab:a:0 128k -ar:a:0 48k -acodec:a:0 aac -ac:a:0 2  -map i:0xc7b -ab:a:1 128k -ar:a:1 48k -acodec:a:1 aac -ac:a:1 2  -map i:0xc7c -ab:a:2 128k -ar:a:2 48k -acodec:a:2 aac -ac:a:2 2  -map i:0xc7d -ab:a:3 128k -ar:a:3 48k -acodec:a:3 aac -ac:a:3 2  -f mpegts "udp://@239.100.0.23:3234?overrun_nonfatal_option=1&pkt_size=1316

  And the output (speed should be 1> i hope)

  Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> h264 (h264_nvenc))
  
   Stream #0:0 -> #0:1 (h264 (h264_cuvid) -> h264 (h264_nvenc))
  
   Stream #0:0 -> #0:2 (h264 (h264_cuvid) -> h264 (h264_nvenc))
  
   Stream #0:0 -> #0:3 (h264 (h264_cuvid) -> h264 (h264_nvenc))
  
   Stream #0:1 -> #0:4 (mp2 (native) -> aac (native))
  
   Stream #0:2 -> #0:5 (mp2 (native) -> aac (native))
  
   Stream #0:3 -> #0:6 (mp2 (native) -> aac (native))
  
   Stream #0:4 -> #0:7 (mp2 (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, mpegts, to 'udp://@239.100.0.23:3234?overrun_nonfatal_option=1&pkt_size=1316':=  -0.0kbits/s speed=N/A    
  
   Metadata:
  
     encoder         : Lavf57.83.100
  
     Stream #0:0: Video: h264 (h264_nvenc) (Main), cuda, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 400 kb/s, 25 fps, 90k tbn, 25 tbc
  
     Metadata:
  
       encoder         : Lavc57.107.100 h264_nvenc
  
     Side data:
  
       cpb: bitrate max/min/avg: 400000/0/400000 buffer size: 800000 vbv_delay: -1
  
     Stream #0:1: Video: h264 (h264_nvenc) (Main), cuda, 720x405 [SAR 1:1 DAR 16:9], q=-1--1, 1000 kb/s, 25 fps, 90k tbn, 25 tbc
  
     Metadata:
  
       encoder         : Lavc57.107.100 h264_nvenc
  
     Side data:
  
       cpb: bitrate max/min/avg: 1000000/0/1000000 buffer size: 2000000 vbv_delay: -1
  
     Stream #0:2: Video: h264 (h264_nvenc) (Main), cuda, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 2500 kb/s, 25 fps, 90k tbn, 25 tbc
  
     Metadata:
  
       encoder         : Lavc57.107.100 h264_nvenc
  
     Side data:
  
       cpb: bitrate max/min/avg: 2500000/0/2500000 buffer size: 5000000 vbv_delay: -1
  
     Stream #0:3: Video: h264 (h264_nvenc) (Main), cuda, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 4500 kb/s, 25 fps, 90k tbn, 25 tbc
  
     Metadata:
  
       encoder         : Lavc57.107.100 h264_nvenc
  
     Side data:
  
       cpb: bitrate max/min/avg: 4500000/0/4500000 buffer size: 9000000 vbv_delay: -1
  
     Stream #0:4(cze): Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
  
     Metadata:
  
       encoder         : Lavc57.107.100 aac
  
     Stream #0:5(eng): Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
  
     Metadata:
  
       encoder         : Lavc57.107.100 aac
  
     Stream #0:6(hun): Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
  
     Metadata:
  
       encoder         : Lavc57.107.100 aac
  
     Stream #0:7(ron): Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
  
     Metadata:
  
       encoder         : Lavc57.107.100 aac
  
  frame= 2868 fps= 19 q=18.0 Lq=14.0 q=15.0 q=16.0 size=  134155kB time=00:01:55.88 bitrate=9484.0kbits/s speed=0.768x

  Does anyone have experiences with something like this ?

• Converting MP4 to HLS via ffmpeg producing stream with start delay

  24 mai 2018, par Eugene Alexeev

  I’m trying to convert mp4 to hls via this FFMpeg command :

  ffmpeg -i 1.mp4 -vcodec copy -q:v 5 -hls_time 5 -hls_list_size 0 -f hls 1.m3u8

  Command is working fine, without any errors whatsoever. BUT, when I’m trying to play brand-new HLS stream locally I noticed that it has a fixed start delay. I checked metadata of stream with ffprobe 1.m3u8 And that’s what I got :

  Input #0, hls,applehttp, from '1.m3u8':
 Duration: 00:00:11.17, start: 1.400000, bitrate: 0 kb/s
 Program 0
   Metadata:
     variant_bitrate : 0
   Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, smpte170m/bt709/bt709), 720x1280, 30 fps, 30 tbr, 90k tbn, 180k tbc
   Metadata:
     variant_bitrate : 0

  As you can see, parameter start has value of 1.400000 and I believe that’s the reason of this annoying start delay. My question is - how can I get rid of that ?

  I tried to set start time with -ss flag but it doesn’t affect an output at all. Also input is perfectly fine, I tried to convert it with the same command but to .mp4 and I got correct results. Am I missing something here ? I would be very appreciated for any help. Thanks.

• Not able to change the program number for the video

  17 mai 2018, par C.B. Akshay Kumar

  I have been trying to change the program number of a particular .ts file using FFmpeg without any success. I saw the documentation and it mentions to use the -program option. But, I am not able to add the streams as I desire. Here’s the program information for the stream that I possess currently :

  Input #0, mpegts, from 'output_2_without_pgm_num.ts':
  
    Duration: 00:01:49.92, start: 1.400000, bitrate: 1816 kb/s
  
    Program 1
  
      Metadata:
  
    service_name    : Service01
  
    service_provider: FFmpeg
  
  Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, progressive), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
  Stream #0:1[0x101](ger): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s (clean effects)
  
  Stream #0:2[0x102](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s (clean effects)
  
  Stream #0:3[0x103](ger): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)

  Now, I want to change the program number from 1 to 22. Any idea how I could do that ? I have tried using -program option, but I can’t add streams 2 and 3 to the newly created .ts file.

  Thanks in advance !