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• how to run "3gp, FLV, avi" video format in AVPLAYER or MPMoviePlayerViewController in iOS ?

  8 mai 2015, par Jenifer

  I need to play 3gp, FLV, avi Video file format in my application.
  I had searched lot about it.

  Got some library like "FFmpeg" Library. But could not find any sample code for it.

  Any other ways for it are also appreciated.

  Does any body have done it before ?

  I am even not sure that if it is possible or not in iOS.

  Please give me solution for it.

  UPDATE :

  I tried one 3gp Video in my AVquePlaye but it is not play in my code,

  While i use same Video in WhatsApp in my iPhone, Surprisingly video is playing there.

• Piping to ffmpeg fails - "pipe: : Not enough space"

  23 avril 2015, par Classiest Medic

  I’m attempting to write a script that can download a file from a webserver to memory, pipe it directly to the ffprobe module of ffmpeg, and return the file’s details as determined by ffprobe. This is what I currently have :

  import requests
  
  from io import BytesIO
  
  from subprocess import Popen, PIPE
  
  
  
  def get_file(url):
  
      r = requests.get(url)
  
      file = BytesIO(r.content).seek(0)
  
      return file
  
  
  
  def get_info(file):
  
      p = Popen(["ffprobe", "-i", "-"], stdin=file, stdout=PIPE, stderr=PIPE)
  
      output = p.communicate()[1].decode("utf8")
  
      return output

  Here is a comparison between outputs for a file loaded with open() :

  ffprobe version N-66931-gbbd8c85 Copyright (c) 2007-2014 the FFmpeg developers
  
    built on Oct 17 2014 01:05:12 with gcc 4.9.1 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      54. 10.100 / 54. 10.100
  
    libavcodec     56.  8.100 / 56.  8.100
  
    libavformat    56.  9.100 / 56.  9.100
  
    libavdevice    56.  1.100 / 56.  1.100
  
    libavfilter     5.  1.106 /  5.  1.106
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mp3, from 'pipe:':
  
    Metadata:
  
      title           : Test File
  
    Duration: N/A, start: 0.000000, bitrate: 320 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
  
      Metadata:
  
        title           : Test File

  ... and a file downloaded with get_file() :

  ffprobe version N-66931-gbbd8c85 Copyright (c) 2007-2014 the FFmpeg developers
  
    built on Oct 17 2014 01:05:12 with gcc 4.9.1 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      54. 10.100 / 54. 10.100
  
    libavcodec     56.  8.100 / 56.  8.100
  
    libavformat    56.  9.100 / 56.  9.100
  
    libavdevice    56.  1.100 / 56.  1.100
  
    libavfilter     5.  1.106 /  5.  1.106
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  pipe:: Not enough space

  At first, this appears like an issue with insufficient memory, but the files I’m working with are small (<10MB), so I don’t think that’s the issue. Apparently, though, I’m doing something wrong... could anyone give me any suggestions as to why piping would fail in this instance ?

• FFMPEG gives "Error opening Filters" error

  18 juin 2015, par liberation

  I am trying to compress a file and store it in MongoDB via GridFS. I am compressing it using a node module called stream-transponder which uses ffmpeg to compress it. My code looks like this

  bodyParser.process('video/*', function(stream, req, next) {
  
      var busboy = new Busboy({ headers : req.headers });
  
      var fileId = new mongo.ObjectId();
  
      var writestream = gfs.createWriteStream({
  
              filename: (fileId.toString()) + ".mp4",
  
              _id : fileId,
  
              mode : "w",
  
              content_type  : "video/mp4"
  
      });
  
      new Transcoder(stream)
  
          .videoCodec('h264')
  
          .videoBitrate(800 * 1000)
  
          .fps(25)
  
          .aspectRatio(1.7777777)
  
          .audioCodec('aac')
  
          .sampleRate(44100)
  
          .channels(2)
  
          .audioBitrate(128 * 1000)
  
          .format('mp4')
  
      .on('finish', function () {
  
          req.custom = fileId;
  
          console.log(fileId);
  
          next();
  
      }).stream().pipe(writestream);
  
  
  
  });

  The ffmpeg command line call that stream-transcoder makes looks like this :

  ffmpeg -i - -vcodec h264 -b:v 800000 -r 25 -aspect 1.7777777 -acodec aac -ar 44100 -ac 2 -ab 128000 -f avi pipe:1

  sometime’s the command looks like this

  ffmpeg -i - -vf scale=min(trunc(320/hsub)*hsub\,trunc(a*240/hsub)*hsub):min(trunc(240/vsub)*vsub\,trunc(320/a/vsub)*vsub) -vcodec h264 -b:v 800000 -r 25 -acodec libfaac -ar 44100 -ac 2 -ab 128000 -f mp4 -movflags frag_keyframe+faststart pipe:1

  eventhough I am uploading the same exact file I uploaded when I got the former command. They both give the same error (Opening Filters error).

  I tried running encoding a file straight from the terminal with this command :

  ffmpeg -i VIDEO0077.mp4 -c:v h264 -preset slow -crf 22 -c:a copy output2.mp4

  and it worked like a charm. I am not sure what’s causing the Error Opening Filters error.