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• How to livestream a webcam to YouTube with FFmpeg ?

  6 juillet 2023, par pkok

  I want to send the livestream of my webcam to YouTube. I can follow YouTube's guide up to step 8. "Stream Connection" tells me there is "No data" and the button "Go Live" remains unclickable. A screenshot of this situation can be seen at

  



  

  



  As encoding software, I was planning on using FFmpeg because it can run from the target platform, a Raspberry Pi with Raspbian. A USB webcam supported by video4linux2 is used.

  



  FFmpeg's wiki shows that streaming a file can be done with the following :

  



  ffmpeg -re -i input.mkv \&#xA;-c:v libx264 -preset veryfast -maxrate 3000k \&#xA;-bufsize 6000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 160k -ac 2 \&#xA;-ar 44100 -f flv rtmp://live.twitch.tv/app/<stream key="key">&#xA;</stream>

  



  I modified this command in the following ways :
1. It takes the video stream from the webcam with -f v4l2 -i /dev/video0.
2. It does not broadcast any audio with -an.
3. It broadcasts to YouTube's RTMP server, rtmp://a.rtmp.youtube.com/live2/<stream key="key"></stream>

  



  The final version of the command is now :

  



  RTMP_URL="rtmp://a.rtmp.youtube.com/live2"
STREAM_KEY="secr-etse-cret-secr"
OUTPUT=$RTMP_URL/$STREAM_KEY
ffmpeg -re -f v4l2 -i /dev/video0 \
-c:v libx264 -preset veryfast -maxrate 3000k \
-bufsize 6000k -pix_fmt yuv420p -g 50 -an \
-f flv $OUTPUT


  



  When I run this command, I would expect that "Stream connection" would change to something else than "No data" after a few seconds, but that does not happen.

  



  I have tried recording the stream to a local file with :

  



  ffmpeg -re -f v4l2 -i /dev/video0 \
-c:v libx264 -preset veryfast -maxrate 3000k \
-bufsize 6000k -pix_fmt yuv420p -g 50 -an \
-f flv test.flv


  



  This worked fine. That demonstrates to me that the issue is with getting the video stream accepted by YouTube.

  


• Calling one CLU(command line utility) with argument from another CLU in cmd ( youtube-dl from ffmpeg with additional arguments)

  3 septembre 2019, par beastboy

  I am able to run youtube-dl using command prompt , I have already kept youtube-dl.exe in the ffmpeg main folder and the ffmpeg bin folder and also I have kept ffmpeg.exe in the youtube_dl folder,

  now I am trying to call ffmpeg.exe in command prompt from youtube-dl with some additional arguments in ffmpeg and vice versa with the below commands
  and getting the following erros.

  Command

  C:\ffmpeg>youtube-dl -f 160 https://www.youtube.com/watch?v=u3APNJYMrLo --hls-prefer-ffmpeg --external-downloader ffmpeg --external-downloader-args -ss 00:00:20 -to 00:00:30

  Command

  C:\youtube_dl>youtube-dl -f 160 https://www.youtube.com/watch?v=u3APNJYMrLo --hls-prefer-ffmpeg --external-downloader ffmpeg --external-downloader-args -ss 00:00:20 -to 00:00:30

  Error

  Usage: youtube-dl [OPTIONS] URL [URL...]
  
  
  
  youtube-dl: error: using output template conflicts with using title, video ID or auto number

  and

  Command

  ffmpeg -ss 00:00:20 -to 00:00:30 -i "$(youtube-dl -f 160 -g https://www.youtube.com/watch?v=u3APNJYMrLo)" -c copy youtube.mp4

  Error

  $(youtube-dl: No such file or directory

  Command

  ffmpeg -ss 00:00:20 -to 00:00:30 -i $(youtube-dl -f 160 -g https://www.youtube.com/watch?v=u3APNJYMrLo) -c copy youtube.mp4

  Error

  $(youtube-dl -f 160 -g https://www.youtube.com/watch?v=u3APNJYMrLo): Invalid argument

  as per my understanding and the documentation pages of youtube-dl and ffmpeg the commands should work and should download the videos in the specified resolution but its not working.
  Can someone guide me on this , what is wrong with the code and how to rectify it if any.

• Ffmpeg live streaming to Youtube - "Connect streaming software to start preview"

  10 septembre 2019, par Zoltan Fedor

  I have an rtsp feed (H.265) which I am trying to stream to YouTube Live, but whatever I do YouTube Studio just showing the waiting icon with "Connect streaming software to start preview".

  .sh file for streaming :

  VBR="1000k"
  
  FPS="30"
  
  QUAL="ultrafast"
  
  YOUTUBE_URL="rtmp://b.rtmp.youtube.com/live2"
  
  SOURCE="rtsp://qhatever.org:8555/whatever.sdp"      
  
  KEY="xxxx-xxxx-xxxx-xxxx"
  
  
  
  ~/ffmpeg-git-20190905-amd64-static/ffmpeg \
  
      -thread_queue_size 512 \
  
      -rtsp_transport tcp -i "$SOURCE" \
  
      -f lavfi -i anullsrc \
  
      -vcodec libx264 -pix_fmt yuvj420p -preset $QUAL -r $FPS -g $(($FPS * 2)) -b:v 2250k -minrate $VBR -maxrate 6000k -bufsize 6000k -keyint_min 60 \
  
      -acodec libmp3lame -ar 44100 -b:a 128k \
  
      -f flv "$YOUTUBE_URL/$KEY"

  Ffmpeg’s output :

  ffmpeg version N-49800-g2b66c757d6-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  
    libavutil      56. 35.100 / 56. 35.100
  
    libavcodec     58. 56.101 / 58. 56.101
  
    libavformat    58. 32.104 / 58. 32.104
  
    libavdevice    58.  9.100 / 58.  9.100
  
    libavfilter     7. 58.102 /  7. 58.102
  
    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://whatever.org:8555/whatever.sdp':
  
    Metadata:
  
      title           : streamed by the Rtsp Server
  
      comment         : RTSP_STREAM_0
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: hevc (Main), yuvj420p(pc, bt709), 1920x1080, 30 fps, 30 tbr, 90k tbn, 30 tbc
  
      Stream #0:1: Data: none
  
  Input #1, lavfi, from 'anullsrc':
  
    Duration: N/A, start: 0.000000, bitrate: 705 kb/s
  
      Stream #1:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (hevc (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (pcm_u8 (native) -> mp3 (libmp3lame))
  
  Press [q] to stop, [?] for help
  
  [hevc @ 0x5fbfd80] Could not find ref with POC 4
  
  [libx264 @ 0x5fb9d80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x5fb9d80] profile Constrained Baseline, level 4.0, 4:2:0, 8-bit
  
  [libx264 @ 0x5fb9d80] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=60 keyint_min=31 scenecut=0 intra_refresh=0 rc_lookahead=0 rc=abr mbtree=0 bitrate=2250 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=6000 vbv_bufsize=6000 nal_hrd=none filler=0 ip_ratio=1.40 aq=0
  
  Output #0, flv, to 'rtmp://b.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx':
  
    Metadata:
  
      title           : streamed by the Rtsp Server
  
      comment         : RTSP_STREAM_0
  
      encoder         : Lavf58.32.104
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuvj420p(pc, progressive), 1920x1080, q=-1--1, 2250 kb/s, 30 fps, 1k tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc58.56.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 6000000/0/2250000 buffer size: 6000000 vbv_delay: N/A
  
      Stream #0:1: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 44100 Hz, stereo, s16p, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc58.56.101 libmp3lame
  
  frame= 522 fps=31 q=19.0 size=  8802Kb time=00:00:36:53 bitrate 2481.0kbits/s dup= drop=2 speed=1.01x

  Basically all looks good to me - still, in YouTube Studio only the waiting icon with the "Connect streaming software to start preview" message is visible, not video feed.

  Any ideas ?