Sur d’autres sites (11299)

• golomb : Convert to the new bitstream reader

  30 janvier 2017, par Diego Biurrun

  golomb : Convert to the new bitstream reader
  

  • [DBH] libavcodec/aic.c
  • [DBH] libavcodec/cavs.c
  • [DBH] libavcodec/cavsdec.c
  • [DBH] libavcodec/dirac.c
  • [DBH] libavcodec/ffv1dec.c
  • [DBH] libavcodec/ffv1enc.c
  • [DBH] libavcodec/fic.c
  • [DBH] libavcodec/flacdec.c
  • [DBH] libavcodec/flacenc.c
  • [DBH] libavcodec/golomb.h
  • [DBH] libavcodec/golomb_legacy.h
  • [DBH] libavcodec/h264_cavlc.c
  • [DBH] libavcodec/h264_parse.c
  • [DBH] libavcodec/h264_parser.c
  • [DBH] libavcodec/h264_ps.c
  • [DBH] libavcodec/h264_refs.c
  • [DBH] libavcodec/h264_sei.c
  • [DBH] libavcodec/h264_slice.c
  • [DBH] libavcodec/h264dec.c
  • [DBH] libavcodec/hevc_parser.c
  • [DBH] libavcodec/hevc_ps.c
  • [DBH] libavcodec/hevc_ps_enc.c
  • [DBH] libavcodec/hevc_sei.c
  • [DBH] libavcodec/hevcdec.c
  • [DBH] libavcodec/jpeglsdec.c
  • [DBH] libavcodec/jpeglsenc.c
  • [DBH] libavcodec/loco.c
  • [DBH] libavcodec/ralf.c
  • [DBH] libavcodec/rv30.c
  • [DBH] libavcodec/rv34.c
  • [DBH] libavcodec/rv40.c
  • [DBH] libavcodec/shorten.c
  • [DBH] libavcodec/svq3.c
  • [DBH] libavcodec/tests/golomb.c
  • [DBH] libavformat/hevc.c

• nodejs ffmpeg works in local but not in production

  24 octobre 2019, par HUNG

  var proc = 
  
  ffmpeg()
  
  .input('./public/img/capture/photoframe.png')
  
  .input( scenePath + '%04d.png')
  
  .inputFPS(15)
  
  .input( msgPath + '%04d.png')
  
  .inputFPS(15)
  
  .input( path + data + '.' + ext )
  
  .complexFilter([
  
      "[3:v]scale=668:-1[scaledUGC]",
  
      "[0]overlay=66:155[output0]",
  
      "[output0][scaledUGC]overlay=66:155[output1]",
  
      "[output1][1]overlay=66:155[output2]",
  
      "[output2][2]overlay=66:155[output3]",
  
      "[output3][0]overlay=0:0[output4]"  
  
  ], 'output4')
  
  .outputFPS(15)
  
  .on('start', function(command) {
  
      if (env === 'development') {
  
          console.log(new Date());
  
          console.log('Start with command:'+command);
  
      }
  
  })
  
  // .on('progress', function(progress) {
  
  //     if (env === 'development') {
  
  //         console.log(progress.percent + "% done");
  
  //     }
  
  // })
  
  .on('end', function() {
  
      if (env === 'development') {
  
          console.log(new Date());
  
          console.log('file has been converted succesfully');
  
      }
  
  
  
      var gifMaker = 
  
      ffmpeg()
  
      .input('./public/_ugc/' + data + '.mp4')
  
      .save('./public/_ugc/' + data + '.gif');
  
  
  
      res.send({
  
          status: "success",
  
          uid: data
  
      });
  
  
  
  })
  
  .on('error', function(err) {
  
      console.log('an error happened: ' + err.message);
  
  
  
      res.send({
  
          status: "err",
  
          uid: "err_video"
  
      });
  
  })
  
  .save('./public/_ugc/' + data + '.mp4');

  I have the above code that can successfully generate a 5s video in my local Mac.

  However, when I push the code to the production Ubuntu, it can only generate a 1s video only.

  There is no error in the Ubuntu side. I wonder if I missed anything.

  I also wonder should I preload the source images first ?

  node v12.13.0

  ffmpeg version 2.8.15-0

  ubuntu0.16.04.1

• ffmpeg Extract multiple streams from mkv to mp4

  28 mai 2016, par Sebastien Lemichez

  The situation

  I’m working on a everything to high compatibility mp4 app.
  The goal is to pass a video file and get a mp4 file that can be played by almost every player.

  I’m using ffmpeg to do so with this command :

  "ffmpeg -i " + inputPath + " -c:v libx264 -profile:v baseline -level 3.0 -preset ultrafast " + outputPath

  I’m doing it in a c# wrapper and it’s working like a charm.

  The Problem

  The real problem comes with extra streams that you can commonly find in mkv files like extra audio stream and multiple subtitles.

  So my goal is to use ffprobe.exe to get all input streams, extract them into different files and then using mp4box.exe to add them to my high compatibility mp4 file generated by ffmpeg.exe

  What I’ve done so far

  I have managed to get input streams in json with a structure like this :

  "streams":[
  
      {
  
          "index": 0,
  
          "codec_name": "h264",
  
          "codec_type": "video"
  
      },
  
      {
  
          "index": 1,
  
          "codec_name": "aac",
  
          "codec_type": "audio"
  
      },
  
      {
  
          "index": 2,
  
          "codec_name": "subrip",
  
          "codec_type": "subtitle"
  
          "tags":{
  
              "language": "eng"
  
          }
  
      },
  
      {
  
          "index": 3,
  
          "codec_name": "subrip",
  
          "codec_type": "subtitle"
  
          "tags":{
  
              "language": "fre"
  
          }
  
      },
  
      {
  
          "index": 4,
  
          "codec_name": "aac",
  
          "codec_type": "audio"
  
          "tags":{
  
              "language": "fre"
  
              "title": "Commentary"
  
          }
  
      }
  
  ]

  Where I’m stuck

  To extract those extra stream I would need to do something like this :

  ffmpeg -i input.mkv \
  
  -map 0:2 -c copy subtitle-2.srt \
  
  -map 0:3 -c copy subtitle-3.srt \
  
  -map 0:4 -c copy audio-4.aac

  So is there a way to use my ffprobe result to get these file extension because I have a codec_name "subrip" that should be saved in a srt.

  I’m avoiding an hard coded list because if I miss a format it will break. I’m more looking for a ffmpeg or ffprobe associated list I can use.

  English is not my native language so sorry for any misstakes.