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• ffmpeg mod if case in source code

  5 février 2014, par Stephan Pokorny

  I'm working on a specific ffmpeg mod where I have to auto execute an extension within the binary call.

  Specific it is the extension -isync -af aresample=async=1000

  The binary is called by another compiled tool which escapes my input.

  For that reason I wanna rewrite the filter rule to execude in any case.

  if (audio_sync_method > 0) {
  
      char args[256] = {0};
  
  
  
      av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
  
      if (audio_drift_threshold != 0.1)
  
          av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
  
      if (!fg->reconfiguration)
  
          av_strlcatf(args, sizeof(args), ":first_pts=0");
  
      AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
  
  }

  Can somebody help me to execute this AUTO_INSERT_FILTER in any case which could happen.

  I already played around to answer any if loop with the AUTO_INSERT_FILTER_INPUT("-async", "aresample", 1000) ;

  When I launch I can see that it is calling the fresh compiled version of ffmpeg but not activating the filter

  Thanks

  Stephan

• Android ffmpeg Issue :- : No such file or directory

  15 février 2014, par Nirav Dangi

  I am using FFMPEG tool to merge IMAGE & AUDIO files. Its working only in SAMSUNG GALAXY TAB II.
  I had tried in many android devices & emulators but unfortunately it had not worked in any of them.

  Same issue is posted here also. But Its solutions has not worked for me.

  Following is error log of emulator,

  02-15 08:46:33.667: D/NIRAV(921): Shell Line : /data/data/org.ffmpeg.android/lib/libffmpeg.so -y -loop 1 -r 1 -i /mnt/sdcard/ffmpeg/img.jpg -i /mnt/sdcard/ffmpeg/myrecord.mp4 -acodec aac -vcodec mpeg4 -s 480x320 -strict experimental -b:a 32k -shortest -f mp4 -r 2 /mnt/sdcard/ffmpeg/out.mp4 
  
  02-15 08:46:33.707: D/NIRAV(921): Shell Line : ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
  02-15 08:46:33.717: D/NIRAV(921): Shell Line :   built on Nov 15 2013 00:50:10 with gcc 4.6 20120106 (prerelease)
  
  02-15 08:46:33.717: D/NIRAV(921): Shell Line :   configuration: --arch=arm --cpu=cortex-a8 --target-os=linux --enable-runtime-cpudetect --enable-small --prefix=/data/data/info.guardianproject.ffmpeg/app_opt --enable-pic --disable-shared --enable-static --cross-prefix=/home/n8fr8/dev/android/ndk//toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --sysroot=/home/n8fr8/dev/android/ndk//platforms/android-3/arch-arm --extra-cflags='-I../x264 -mfloat-abi=softfp -mfpu=neon' --extra-ldflags=-L../x264 --enable-version3 --enable-gpl --disable-doc --enable-yasm --enable-decoders --enable-encoders --enable-muxers --enable-demuxers --enable-parsers --enable-protocols --enable-filters --enable-avresample --enable-libfreetype --disable-indevs --enable-indev=lavfi --disable-outdevs --enable-hwaccels --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network --enable-libx264 --enable-zlib --enable-muxer=md5
  
  02-15 08:46:33.717: D/NIRAV(921): Shell Line :   libavutil      51. 54.100 / 51. 54.100
  
  02-15 08:46:33.717: D/NIRAV(921): Shell Line :   libavcodec     54. 23.100 / 54. 23.100
  
  02-15 08:46:33.717: D/NIRAV(921): Shell Line :   libavformat    54.  6.100 / 54.  6.100
  
  02-15 08:46:33.717: D/NIRAV(921): Shell Line :   libavdevice    54.  0.100 / 54.  0.100
  
  02-15 08:46:33.727: D/NIRAV(921): Shell Line :   libavfilter     2. 77.100 /  2. 77.100
  
  02-15 08:46:33.727: D/NIRAV(921): Shell Line :   libswscale      2.  1.100 /  2.  1.100
  
  02-15 08:46:33.727: D/NIRAV(921): Shell Line :   libswresample   0. 15.100 /  0. 15.100
  
  02-15 08:46:33.727: D/NIRAV(921): Shell Line :   libpostproc    52.  0.100 / 52.  0.100
  
  02-15 08:46:33.747: D/NIRAV(921): Shell Line : /mnt/sdcard/ffmpeg/img.jpg: No such file or directory
  
  02-15 08:46:33.747: D/NIRAV(921): Exit Value : 1

  I had verified the path of img.jpg & myrecord.mp4 files.
  I am using android-ndk-r7 to build ffmpeg.

• HLS Streaming using node JS

  20 février 2014, par Tirtha

  I'm trying to stream HLS content using node.js. And somehow it is not working. It'll be of great help if someone helps me out.

  Problem :-
  Trying to serve HLS content from node.js (not live stream, but a set of .ts files and .m3u8 playlist, or in other words VOD content)

  Folder Structure

  stream_test
  
  |--- app.js
  
  |--- node_modules
  
  |--- streamcontent
  
          |--- test.m3u8
  
          |--- segment0.ts
  
          |--- segment1.ts
  
          .
  
          .
  
          .
  
          |--- segment127.ts

  My app.js looks like this

  var http = require('http'),
  
      url = require('url'),
  
      path = require('path'),
  
      fs = require('fs');
  
  var mimeTypes = {
  
      "html": "text/html",
  
      "jpeg": "image/jpeg",
  
      "jpg": "image/jpeg",
  
      "png": "image/png",
  
      "js": "text/javascript",
  
      "css": "text/css",
  
      "ts": "video/MP2T",
  
      "m3u8": "application/vnd.apple.mpegurl"};
  
  
  
  http.createServer(function(req, res) {
  
      var uri = url.parse(req.url).pathname;
  
      var filename = path.join(process.cwd(), unescape(uri));
  
      var stats;
  
  
  
      console.log('filename '+filename);
  
  
  
      try {
  
          stats = fs.lstatSync(filename); // throws if path doesn't exist
  
      } catch (e) {
  
          res.writeHead(404, {'Content-Type': 'text/plain'});
  
          res.write('404 Not Found\n');
  
          res.end();
  
          return;
  
      }
  
  
  
  
  
      if (stats.isFile()) {
  
          // path exists, is a file
  
          var mimeType = mimeTypes[path.extname(filename).split(".")[1]];
  
          res.writeHead(200, {'Content-Type': mimeType} );
  
  
  
          var fileStream = fs.createReadStream(filename);
  
          fileStream.pipe(res);
  
      } else if (stats.isDirectory()) {
  
          // path exists, is a directory
  
          res.writeHead(200, {'Content-Type': 'text/plain'});
  
          res.write('Index of '+uri+'\n');
  
          res.write('TODO, show index?\n');
  
          res.end();
  
      } else {
  
          // Symbolic link, other?
  
          // TODO: follow symlinks?  security?
  
          res.writeHead(500, {'Content-Type': 'text/plain'});
  
          res.write('500 Internal server error\n');
  
          res.end();
  
      }
  
  
  
  }).listen(8000);

  The test.m3u8 looks like this

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-ALLOW-CACHE:YES
  
  #EXT-X-TARGETDURATION:19
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXTINF:12.595922,
  
  segment0.ts
  
  .
  
  .
  
  .

  I used ffmpeg to create the segments and palylist

  ffmpeg -i video-a.mp4  -c:a libmp3lame -ar 48000 -ab 64k  -c:v libx264   -b:v 128k -flags -global_header -map 0 -f segment  -segment_list test.m3u8 -segment_time 30 -segment_format mpegts segment_%05d.ts

  Test Scenraio :-
  Works fine if served from Apache, does not if served from node.

  Test Tool :-
  VNC Player