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• ffmpeg to Youtube Live stops working. ffmpeg continues to run

  10 février 2020, par Robert Pringle

  I’m streaming a mobotix camera to Youtube Live.

  This works correctly for a period of time. Youtube then reports the stream as "noData".
  ffmpeg continues to run, but no video is being received by Youtube.

  The problem is intermittant.

  Restarting the ffmpeg process makes Youtube start receiving the stream again.

  ffmpeg is being run as a systemd service.

  ffmpeg is run with the following command :

  ffmpeg -nostdin  -f lavfi  -i anullsrc  -rtsp_transport tcp -thread_queue_size 512 -i "rtsp://@192.168.1.1:554/mobotix.h264"   -tune zerolatency  -vcodec libx264  -pix_fmt + -c:v copy  -c:a aac  -strict experimental  -f flv rtmp://a.rtmp.youtube.com/live2/

  Logs only show : ffmpeg[47357]: [48.0K blob data]

  Any ideas on how to solve this ? Or improve the logging.

  Edit :
  Logs from starting ffmpeg :

      Feb 07 17:57:00 localhost.localdomain ffmpeg[49525]: [48.0K blob data]
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:       encoder         : Lavc58.54.100 aac
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     Metadata:
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     Stream #0:0: Video: h264 (Constrained Baseline) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1024x768, q=2-31, 12.50 tbr, 1k tbn, 90k tbc
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:     encoder         : Lavf58.29.100
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:   Metadata:
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]: Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/':
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:   Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]:   Stream #1:0 -> #0:0 (copy)
  
      Feb 07 17:52:47 localhost.localdomain ffmpeg[49525]: Stream mapping:
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:     Stream #1:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 1024x768, 12.50 tbr, 90k tbn, 180k tbc
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:   Duration: N/A, start: 136.139322, bitrate: N/A
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:     comment         : mobotix.h264
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:     title           : Mobotix IP-Camera (H.264, unicast)
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]:   Metadata:
  
      Feb 07 17:52:46 localhost.localdomain ffmpeg[49525]: Input #1, rtsp, from 'rtsp://@192.168.1.1:554/mobotix.h264':
  
      Feb 07 17:52:44 localhost.localdomain ffmpeg[49525]: [h264 @ 0x559ee7857940] concealing 2400 DC, 2400 AC, 2400 MV errors in P frame
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:     Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   Duration: N/A, start: 0.000000, bitrate: 705 kb/s
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]: Input #0, lavfi, from 'anullsrc':
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libpostproc    55.  5.100 / 55.  5.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libswresample   3.  5.100 /  3.  5.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libswscale      5.  5.100 /  5.  5.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavresample   4.  0.  0 /  4.  0.  0
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavfilter     7. 57.100 /  7. 57.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavdevice    58.  8.100 / 58.  8.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavformat    58. 29.100 / 58. 29.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavcodec     58. 54.100 / 58. 54.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   libavutil      56. 31.100 / 56. 31.100
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 >
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]:   built with gcc 8 (GCC)
  
      Feb 07 17:52:43 localhost.localdomain ffmpeg[49525]: ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers

  Running the command manually gave me logs and exited, whereas the systemd service keeps running.

      [flv @ 0x560541a8b3c0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
      av_interleaved_write_frame(): Broken pipekB time=03:35:18.84 bitrate=3131.8kbits/s speed=0.999x    
  
          Last message repeated 1 times
  
      [flv @ 0x560541a8b3c0] Failed to update header with correct duration.
  
      [flv @ 0x560541a8b3c0] Failed to update header with correct filesize.
  
      Error writing trailer of rtmp://a.rtmp.youtube.com/live2/: Broken pipe
  
      frame=134427 fps= 10 q=-1.0 Lsize= 4938869kB time=03:35:18.96 bitrate=3131.8kbits/s speed=0.997x    
  
      video:4923745kB audio:3296kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.240068%
  
      [aac @ 0x560541a6d680] Qavg: 65536.000
  
      Conversion failed!

• Gaps in audio when pushing rtsp stream to rtmp with ffmpeg

  13 avril 2020, par user13300863

  I push the stream like so :

  



  % ffmpeg -rtsp_transport tcp -i "rtsp://**********************" -codec copy -f flv rtmp://x.rtmp.youtube.com/live2/****************

ffmpeg version N-94664-g0821bc4eee Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.1.1 (GCC) 20190807
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 33.100 / 56. 33.100
  libavcodec     58. 55.101 / 58. 55.101
  libavformat    58. 31.104 / 58. 31.104
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 58.101 /  7. 58.101
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
Input #0, rtsp, from 'rtsp:*************************':
  Metadata:
    title           : Media Server
  Duration: N/A, start: 0.040000, bitrate: N/A
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1280x720, 12 fps, 25 tbr, 90k tbn, 24 tbc
    Stream #0:1: Audio: aac (LC), 32000 Hz, mono, fltp
Output #0, flv, to 'rtmp://x.rtmp.youtube.com/live2/********************':
  Metadata:
    title           : Media Server
    encoder         : Lavf58.31.104
    Stream #0:0: Video: h264 (Main) ([7][0][0][0] / 0x0007), yuvj420p(pc, bt709, progressive), 1280x720, q=2-31, 12 fps, 25 tbr, 1k tbn, 90k tbc
    Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 32000 Hz, mono, fltp
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 120; changing to 557. This may result in incorrect timestamps in the output file.
[flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 200; changing to 557. This may result in incorrect timestamps in the output file.
[flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 320; changing to 557. This may result in incorrect timestamps in the output file.
[flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 400; changing to 557. This may result in incorrect timestamps in the output file.
[flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 480; changing to 557. This may result in incorrect timestamps in the output file.
frame=    7 fps=0.0 q=-1.0 size=      74kB time=00:00:00.56 bitrate=1079.1kbits/s speed=1.06x    
frame=   25 fps= 19 q=-1.0 size=     188kB time=00:00:02.08 bitrate= 741.5kbits/s speed=1.61x    
frame=   49 fps= 22 q=-1.0 size=     330kB time=00:00:04.08 bitrate= 661.9kbits/s speed=1.83x    
frame=   67 fps= 25 q=-1.0 size=     392kB time=00:00:05.66 bitrate= 567.3kbits/s speed=2.07x    
frame=   72 fps= 22 q=-1.0 size=     410kB time=00:00:06.06 bitrate= 553.9kbits/s speed=1.84x    
frame=   76 fps= 20 q=-1.0 size=     488kB time=00:00:06.38 bitrate= 626.5kbits/s speed=1.67x    
frame=   86 fps= 20 q=-1.0 size=     519kB time=00:00:07.26 bitrate= 585.5kbits/s speed=1.68x    
frame=   92 fps= 19 q=-1.0 size=     538kB time=00:00:07.74 bitrate= 569.5kbits/s speed= 1.6x    
frame=   97 fps= 17 q=-1.0 size=     618kB time=00:00:08.11 bitrate= 623.8kbits/s speed=1.45x    
frame=  108 fps= 18 q=-1.0 size=     658kB time=00:00:09.02 bitrate= 597.6kbits/s speed=1.48x    
frame=  114 fps= 17 q=-1.0 size=     679kB time=00:00:09.50 bitrate= 585.3kbits/s speed=1.44x    
frame=  120 fps= 17 q=-1.0 size=     698kB time=00:00:10.02 bitrate= 570.5kbits/s speed=1.41x    
frame=  121 fps= 16 q=-1.0 size=     764kB time=00:00:10.09 bitrate= 619.8kbits/s speed=1.32x    
frame=  132 fps= 16 q=-1.0 size=     802kB time=00:00:11.01 bitrate= 596.7kbits/s speed=1.35x    
frame=  138 fps= 16 q=-1.0 size=     820kB time=00:00:11.57 bitrate= 580.6kbits/s speed=1.34x    
frame=  144 fps= 16 q=-1.0 size=     841kB time=00:00:12.05 bitrate= 571.5kbits/s speed=1.32x    
frame=  149 fps= 15 q=-1.0 size=     923kB time=00:00:12.45 bitrate= 606.8kbits/s speed=1.29x    
frame=  157 fps= 15 q=-1.0 size=     949kB time=00:00:13.13 bitrate= 592.0kbits/s speed=1.28x    
frame=  163 fps= 15 q=-1.0 size=     969kB time=00:00:13.65 bitrate= 581.3kbits/s speed=1.27x    
frame=  169 fps= 15 q=-1.0 size=    1051kB time=00:00:14.09 bitrate= 610.9kbits/s speed=1.22x    
frame=  180 fps= 15 q=-1.0 size=    1091kB time=00:00:15.05 bitrate= 593.6kbits/s speed=1.24x    
frame=  187 fps= 15 q=-1.0 size=    1113kB time=00:00:15.61 bitrate= 583.8kbits/s speed=1.23x    
frame=  192 fps= 15 q=-1.0 size=    1130kB time=00:00:16.05 bitrate= 576.7kbits/s speed=1.21x    
frame=  197 fps= 14 q=-1.0 size=    1212kB time=00:00:16.45 bitrate= 603.2kbits/s speed= 1.2x    
frame=  206 fps= 14 q=-1.0 size=    1241kB time=00:00:17.17 bitrate= 592.1kbits/s speed= 1.2x    
frame=  213 fps= 14 q=-1.0 size=    1265kB time=00:00:17.77 bitrate= 582.8kbits/s speed= 1.2x    
frame=  217 fps= 14 q=-1.0 size=    1340kB time=00:00:18.09 bitrate= 606.6kbits/s speed=1.16x    
frame=  228 fps= 14 q=-1.0 size=    1380kB time=00:00:19.05 bitrate= 593.4kbits/s speed=1.18x    
frame=  234 fps= 14 q=-1.0 size=    1399kB time=00:00:19.57 bitrate= 585.6kbits/s speed=1.17x    
frame=  240 fps= 14 q=-1.0 size=    1418kB time=00:00:20.05 bitrate= 579.4kbits/s speed=1.16x    
[flv @ 000000000310d540] Failed to update header with correct duration.
[flv @ 000000000310d540] Failed to update header with correct filesize.
frame=  241 fps= 14 q=-1.0 Lsize=    1486kB time=00:00:20.05 bitrate= 606.8kbits/s speed=1.14x    
video:1317kB audio:153kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.058846%
Exiting normally, received signal 2.



  



  When viewed on youtube the stream audio is distorted i.e. it has regular 7ms gaps between each 32ms sound portions.

  



  However, when I save the input stream to a file the audio is fine.
I've experimented with different input/output options for ffmpeg including transcoding the audio stream but nothing helped fix the issue. I think ffmpeg is the culprit here, since VLC or other streaming services like angelcam etc can play the rtsp stream without any distortions.

  


• Cannot get JACK Audio/Netjack working over LAN

  23 juin 2020, par James

  I'm trying to stream low latency audio between 2 raspberry pis. Both gstreamer and ffmpeg induce 2+ second delays for me.

  



  I've played around with Jack Audio and locally on a single pi it seems promising. I can route mic input to a speaker locally and it is almost instantaneous.

  



  However, I have been having trouble getting it to route between devices using Netjack.

  



  # ON SERVER
jackd -P70 -p16 -t2000 -dalsa -dhw:1 -p128 -n3 -r44100 -s 

# ON CLIENT
jackd -v -R -P70 -dnetone -i1 -o1 -I0 -O0  -r44100 -p128 -n3

# ON SERVER
jack_netsource -H < ip address of client >
jack_lsp # list availible connection ports

>system:capture_1
>system:playback_1
>system:playback_2
>netjack:capture_1
>netjack:capture_2
>netjack:capture_3
>netjack:playback_1
>netjack:playback_2
>netjack:playback_3

jack_connect system:capture_1 system:playback_1 # this works
jack_connect system:capture_1 netjack:playback_1 # this doesn't work :(


  



  Most of the launch options I pulled from here http://wiki.linuxaudio.org/wiki/raspberrypi#using_jack. I'll be honest I don't really know what they do.

  



  The client jackd output shows messages like

  



  Jack: data not valid
Jack: data not valid
Jack: JackSocketServerChannel::Execute : fPollTable i = 1 fd = 6
Jack: JackRequest::Notification
Jack: JackEngine::ClientNotify: no callback for notification = 3
Jack: JackEngine::ClientNotify: no callback for notification = 3
netxruns... duration: 139ms
Jack: JackSocketServerChannel::Execute : fPollTable i = 1 fd = 6
Jack: JackRequest::Notification
Jack: JackEngine::ClientNotify: no callback for notification = 3
Jack: JackEngine::ClientNotify: no callback for notification = 3


  



  And the server jack_netsource output looks like

  



  current latency 114
current latency 20
current latency 27
current latency 29
current latency 48
current latency 23
current latency 33
current latency 28
current latency 41
current latency 84
current latency 44


  



  and the server jackd output looks like

  



  JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = netjack was not finished, state = Triggered
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackAudioDriver::ProcessGraphAsyncMaster: Process error
JackEngine::XRun: client = netjack was not finished, state = Triggered
JackEngine::XRun: client = netjack was not finished, state = Triggered


  



  I believe the -dnetone flag indicates to use Netjack2. Netjack 1, which I've tried with the -dnet flag results in a single Not Connected message from jack_netsource and :

  



  Jack: CatchHost fd = 5 err = Resource temporarily unavailable
Jack: CatchHost fd = 5 err = Resource temporarily unavailable
Jack: CatchHost fd = 5 err = Resource temporarily unavailable
Jack: CatchHost fd = 5 err = Resource temporarily unavailable
Jack: CatchHost fd = 5 err = Resource temporarily unavailable
Jack: JackSocketServerChannel::Execute : fPollTable i = 1 fd = 6


  



  from the client jackd.