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• Upload FFmpeg output directly to Amazon S3

  26 octobre 2017, par user1790300

  I am using the fluent-ffmpeg library with node.js to transcode videos originally in a flash movie format to the mp3 format with multiple resolutions, 1080p, etc.. Once the transcoding is complete, I would like to move the transcoded video to an s3 bucket.

  I pull the original .flv file from a source s3 bucket and pass the stream to the ffmpeg constructor function. The issue is after the transcoding completes, how do I then get the stream of the mp4 data to send to s3.

  Here is the code I have so far :

          var params = {
  
              Bucket: process.env.SOURCE_BUCKET,
  
              Key: fileName
  
          };
  
          s3.getObject(params, function(err, data) {
  
              if (err) console.log(err, err.stack); // an error occurred
  
  
  
              var format = ffmpeg(data)
  
              .size('854x480')
  
              .videoCodec('libx264')
  
              .format('flv')
  
              .toFormat('mp4');
  
              .on('end', function () {
  
                  //Ideally, I would like to do the uploading here
  
  
  
                  var params = {
  
                     Body: //{This is my confusion, how do I get the stream to add here?},
  
                     Bucket: process.env.TRANSCODED_BUCKET,
  
                     Key: fileName
  
                  };
  
                  s3.putObject(params, function (err, data) {
  
  
  
                 });
  
              })
  
              .on('error', function (err) {
  
                  console.log('an error happened: ' + err.message);
  
              });
  
  
  
          });

  For the code above, where can I get the transcoded stream to add to the "Body" property of the params object ?

  Update :

  Here is a revision of what I am trying to do :

  var outputStream: MemoryStream = new MemoryStream();
  
  
  
          var proc = ffmpeg(currentStream)
  
              .size('1920x1080')
  
              .videoCodec('libx264')
  
              .format('avi')
  
              .toFormat('mp4')
  
              .output(outputStream)
  
              // setup event handlers
  
              .on('end', function () {
  
                  uploadFile(outputStream, "").then(function(){
  
                      resolve();
  
                  })
  
              })
  
              .on('error', function (err) {
  
                  console.log('an error happened: ' + err.message);
  
              });

  I would like to avoid copying the file to the local filesystem from s3, rather I would prefer to process the file in memory and upload back to s3 when finished. Would fluent-ffmpeg allow this scenario ?

• Why does FFMPEG work with 1080p but doesn't work with 720p size… (code included)

  2 avril 2017, par JavaRunner

  I’ve uploaded my fully compiled code with its Makefile here :

  https://pastebin.com/xtCTj06F

  If I set 1280x720 I get the segmentation fault :

  [libx264 @ 0x7fdf4d25a600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7fdf4d25a600] profile High, level 3.1
  
  [libx264 @ 0x7fdf4d25a600] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=12 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=12 rc=abr mbtree=1 bitrate=3400 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to '1.mp4':
  
      Stream #0:0: Video: h264, yuv420p, 1280x720, q=2-31, 3400 kb/s, 20 tbn
  
      Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 64 kb/s
  
  sws_scale BEGIN
  
  ./MakeVideo.sh: line 2: 26422 Segmentation fault: 11  ./MakeVideo 1.mp4

  There’s some problem with this line :

  std::cout << "sws_scale BEGIN\n";
  
  sws_scale( sws_context, ( const uint8_t * const * ) &rgb, inLinesize, 0, frame->height, frame->data, frame->linesize );
  
  std::cout << "sws_scale END\n";

  but if I set the size of a video to 1920x1080 or to 320x240 - all works fine.

  Is that some sort of a magick ?? Or a bug ?

  OS X 10.12.3
  ffmpeg/3.2.4 —enable-shared —enable-pthreads —enable-gpl —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —disable-lzma —enable-vda

• send console output to Visual Studio 2010

  17 juillet 2014, par Dave Camp

  I’m using Visual Studio 2010 c++ to develop some custom direct show filters. I’m using ffmpeg for the encoding process and if I run tests as a standard console then any ffmpeg errors are displayed in the console window, as one might expect. However the main application is a windows app which doesnt have a console window. When I get errors from ffmpeg all I can use is a fairly generic error return number and it would be great to see what would have been displayed in the console window.

  Is it possible to get the output from ffmpeg of what would go to a console window to display in one of the ’Studio output windows. I’ve ticked the ’Redirect all output window text to the immediate window’ option in Tools->Options->Debugging->General but this doesn’t like the correct option and it doesn’t work anyway.

  Thanks !

  Dave