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• Error ffmpeg during upload stream to youtube

  4 mars 2018, par wolacinio

  I have problem with transmitting video and sound via rtsp to rtmp youtube.
  Run as :

  ffmpeg -rtsp_transport tcp -i "rtsp://user:pass@192.168.1.100:554/cam/realmonitor?channel=1&subtype=0" -vcodec copy -acodec aac -ar 44100 -b:a 128k -ac 1 -f flv rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx

  After few hours transmitting stops with error visible on the picture.
  

  How can I resolve this ?

• How can I compress and create mp4 video file from batch of images on hard disk using ffmpeg ?

  29 juin 2015, par Brubaker Haim

  In my directory I copied ffmpeg.exe to the same directory where all the images are.
  All images are bitmaps.

  Then in the command prompt windows I typed :

  ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i \\.\pipe\mytestpipe -map 0 -c:v mpeg4 -r  out.mp4

  But I get error that there is no a directory name :

  \.\pipe\mytestpipe

  So I removed it and typed the same line without the pipe part.

  ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i -map 0 -c:v mpeg4 -r  out.mp4

  Now there is no a directory name -map

  So I moved the -map 0

  ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 1920x1080 -i -c:v mpeg4 -r  out.mp4

  Now I’m getting error :

  -c:v : Protocol not found

  I used this line with the pipe in my c# program as arguments to ffmpeg using ProcessStartInfo but now I don’t want to use pipes only in the command prompt to type it and compress and create mp4 video file.

  Edit I tried this now :

  ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

  And what I get is some errors :

  E:\screenshots>ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -p
  
  ix_fmt yuv420p out.mp4
  
  ffmpeg version N-73165-gf1e1730 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
  
  ble-decklink --enable-zlib
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 45.100 / 56. 45.100
  
    libavformat    56. 38.102 / 56. 38.102
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 18.100 /  5. 18.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [bmp @ 0000000002eb7f80] bad magic number
  
      Last message repeated 2 times
  
  [image2 @ 0000000002eb64e0] decoding for stream 0 failed
  
  [image2 @ 0000000002eb64e0] Could not find codec parameters for stream 0 (Video:
  
   bmp, none): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  screenshot%06d.bmp: could not find codec parameters
  
  Input #0, image2, from 'screenshot%06d.bmp':
  
    Duration: 00:07:35.00, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: bmp, none, 0.20 fps, 0.20 tbr, 0.20 tbn, 0.20 tbc
  
  Output #0, mp4, to 'out.mp4':
  
  Output file #0 does not contain any stream

  For those who can see. When i’m doing it on a single file for example : ffmpeg -framerate 1/5 -i screenshot000002.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out1.mp4 or screenshot000003.bmp or screenshot000122.bmp it will work fine and create the video file. But when i’m doing this for all images i’m getting all the errors : ffmpeg -framerate 1/5 -i screenshot%06d.bmp -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 here is the results when i did on screenshot000002.bmp and it worked fine.

  When i’m doing it on a single image file it’s working fine like screenshot000002.bmp but when doing it on all the images screenshot%06d.bmp it’s giving me all the errors i mentioned above.

• Extract audio from youtube in a client-side script

  5 mai 2018, par Kevin

  There are a lot of node libraries for turning a youtube video into an audio stream, but all of them rely on a C-library called ffmpeg.

  Ffmpeg has been ported to javascript as well, but it has a 30MB size, which seems rather cumbersome (ffmpeg does a lot more than just rip audio from youtube, it has many advanced audio filtering techniques that won’t be needed for this application).

  Lastly, I came across this link,https://hackernoon.com/how-to-build-an-audio-processor-in-your-browser-302cb7aa502a, which claims to be a client-side audio processor but really does all the stuff on the server-side, and then says that stuff can’t be done in the client because of CORS (not sure I understand this, can’t CORS be avoided with a simple flag in the request ?).

  Does anyone know of any way to stream audio within the client-side browser, specifically from youtube, in a manner that’s general and unopposed ?