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• No sound when running ffmpeg on youtube live

  28 mai 2020, par Bartonsen

  Despite my limited knowledge in ffmpeg, I've managed to livestream my birdbox camera to youtube using ffmpeg running on a raspberry pi. The camera has also audio and by using local vlc in windows with rtsp, the audio is ok.

  



  However, on youtube there is no sound (same rtsp command as used locally in windows), and I see this "warning" in youtube studio : "The current bitrate (0) of the audio stream is lower than the recommended bitrate. We recommend using a 128 Kbps bitrate for the audio stream."

  



  How can I get the sound through youtube ?
This is the command I run. The command was found on the net, and I adopted it for my usage, and got video working straight away :

  



  pi@raspberrypi:~ $ ffmpeg -f lavfi -i anullsrc -thread_queue_size 512 -rtsp_transport udp -i "rtsp://10.x.x.x:554/user=user&password=password&channel=1&stream=0.sdp?real_stream" -tune zerolatency -vcodec libx264 -use_wallclock_as_timestamps 1 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://a.rtmp.youtube.com/live2/mykey
ffmpeg version git-2020-05-01-3c740f2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
  configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree
  libavutil      56. 43.100 / 56. 43.100
  libavcodec     58. 82.100 / 58. 82.100
  libavformat    58. 42.102 / 58. 42.102
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 80.100 /  7. 80.100
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
Input #0, lavfi, from 'anullsrc':
  Duration: N/A, start: 0.000000, bitrate: 705 kb/s
    Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
Guessed Channel Layout for Input Stream #1.1 : mono
Input #1, rtsp, from 'rtsp://10.x.x.x:554/user=user&password=password&channel=1&stream=0.sdp?real_stream':
  Metadata:
    title           : RTSP Session
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #1:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1920x1080, 20 fps, 20 tbr, 90k tbn, 180k tbc
    Stream #1:1: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s
Multiple -c, -codec, -acodec, -vcodec, -scodec or -dcodec options specified for stream 0, only the last option '-c:v copy' will be used.
Stream mapping:
  Stream #1:0 -> #0:0 (copy)
  Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/mykey':
  Metadata:
    encoder         : Lavf58.42.102
    Stream #0:0: Video: h264 (Main) ([7][0][0][0] / 0x0007), yuvj420p(pc, bt709, progressive), 1920x1080, q=2-31, 20 fps, 20 tbr, 1k tbn, 90k tbc
    Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc58.82.100 aac
[flv @ 0x2c43750] 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


  


• ffmpeg youtube live stream vb.net

  17 mai 2020, par Sharath Nandakumar

  i want to stream desktop to youtube live using ffmpeg. I am programming in visual basic 2019. i have downloaded copied ffmpeg to C folder from ffmpeg.org. the code i used was

  



  Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
    Dim psi As ProcessStartInfo = New ProcessStartInfo("C:/ffmpeg.exe")
    Dim proc As Process = Process.Start(psi)
    psi.UseShellExecute = False
    psi.CreateNoWindow = True
    psi.Arguments = "ffmpeg -loglevel debug -threads:v 2 -threads:a 8 -filter_threads 2 -thread_queue_size 512  -f dshow -i video="desktop" -f dshow -i audio="speakers (2- Realtek High Definition Audio)" -pix_fmt yuv420p -c:v libx264 -qp:v 19 -profile:v high -rc:v cbr_ld_hq -level:v 4.2 -r:v 60 -g:v 120 -bf:v 3 -refs:v 16 -f flv rtmp://youtube_stream_url/stream_key"
    proc = Process.Start(psi)
End Sub


  



  End Class

  



  I am not getting any results. Please help me. Thanks in advance

  


• Edit random videos from youtube using ffmpeg

  15 janvier 2015, par Jacques le lezard

  I’m trying to edit several videos of different size, format, ratio, etc (random videos from youtube)

  As to edit these I use : ffmpeg -f concat -i videos.txt -s 1280x720 -c copy output/edited_video.mp4 All videos are listed in videos.txt

  But it doesn’t work like that, it seems ffmpeg need homogeneous videos to edit the finale video. For now the first video is displayed fine but the following are glitched...

  How can I homogenize any video to the same size, ratio, format, codec, ...?

  (For now I use : ffmpeg -i input/video.mp4 -r 30 -vcodec mpeg4 -s 1280x720 -c copy temp/video.mp4 but it seems it’s not enough.)