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• avformat/udp : cancel pending IO on win32 manually

  26 janvier 2020, par Marton Balint

  avformat/udp : cancel pending IO on win32 manually
  recvfrom() is not a cancellation point in pthreads-win32, see
  
  https://sourceware.org/pthreads-win32/manual/pthread_cancel.html
  In order to be able to cancel the reader thread on Win32 properly we first
  
  shutdown the socket then call CancelIoEx to abort pending IO. Subsequent
  
  recvfrom() calls will fail with WSAESHUTDOWN causing the thread to exit.
  Fixes ticket #5717.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavformat/udp.c

• How do you use Node.js to stream S3 audio with ffmpeg without downloading the file first ?

  15 novembre 2015, par LaserJesus

  I’m able to successfully stream an audio file stored on a Node.js server using fluent-ffmpeg. When I alter the code to pass an open file reader to an s3 file instead, it no longer works. What do I need to change to make this work ?

  .get(function(req,res) {
  
      aws.s3(s3Bucket).getFile(s3Path, function (err, result) {
  
          if (err) {
  
              return next(err);
  
          }
  
          var proc = new ffmpeg(result)
  
              .withAudioCodec('libmp3lame')
  
              .format('mp3')
  
              .on('error', function (err, stdout, stderr) {
  
                  console.log('an error happened: ' + err.message);
  
                  console.log('ffmpeg stdout: ' + stdout);
  
                  console.log('ffmpeg stderr: ' + stderr);
  
              })
  
              .on('end', function () {
  
                  console.log('Processing finished !');
  
              })
  
              .on('progress', function (progress) {
  
                  console.log('Processing: ' + progress.percent + '% done');
  
              })
  
              .pipe(res, {end: true});
  
      });
  
  });

• FFMPEG YUV444 to YUV420 [duplicate]

  9 août 2020, par Juan Felipe

  Soo I need to use a video reader which onl accepts yuv420.
I have videos which are yuv444 and have very weird resolutions (they come from an algorith and they are videos manually created stacking frames)

  


  Soo I tried the following

  


  ffmpeg -i CJMOPvsinJE.mp4 -pix_fmt yuv420p yuv420.mp4


  


  But it seems that resolution have to be even.

  


  [libx264 @ 0x556e02626660] width not divisible by 2 (241x1080)
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height


  


  Sooo I solved it by cropping.

  


  ffmpeg -i CJMOPvsinJE.mp4 -filter:v "crop=240:1080:1:0" -pix_fmt yuv420p yuv420.mp4


  


  Buuut The fact is that I need to perform this operation for a bunch of videos.

  


  Is there a way to tell ffmpeg to crop to the nearest even resolution ? Namely, if resolution is odd just to remove 1 row/column.