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• Ffmpeg - Convert Wav to OGG on Android (wrong metadata on some devices)

  13 décembre 2016, par Pepa Zapletal

  I have in the app Wav file and I want to convert it to the OGG format.

  I’m using ffmpeg library for it and this command :

  ffmpeg -i /storage/emulated/0/Test.wav -c:a libvorbis -q:a 5 /storage/emulated/0/Test.ogg

  But I have problem play correctly the generated OGG file on some Android devices. If I open this file in standard MediaPlayer then I get the wrong file duration, seeking is also not working very well BUT the file is played whole and correctly. This happens for example on Huawei M2 with Android 5.1 but on Samsung Galaxy S5 (with Android 5.1) the generated file is OK and playing is also OK.

  Do you have some idea where can be a problem ?

  Full output from ffmpeg :

  ffmpeg version n2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
  
  built with gcc 4.9 (GCC) 20140827 (prerelease)
  
    configuration: --target-os=linux --cross-prefix=/home/chrono/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --enable-runtime-cpudetect --sysroot=/home/chrono/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libtheora --enable-libfdk-aac --enable-nonfree --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/chrono/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/chrono/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/chrono/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp' --extra-ldflags='-L/home/chrono/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie -Wl,--fix-cortex-a8' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
   Input #0, wav, from '/storage/emulated/0/IAMDJ/MyLoops/mix folder/Test.wav':
  
     Metadata:
  
       encoder         : Lavf56.25.101
  
     Duration: 00:00:16.01, bitrate: 1411 kb/s
  
       Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
  
   Output #0, ogg, to '/storage/emulated/0/Test.ogg':
  
     Metadata:
  
       encoder         : Lavf56.25.101
  
       Stream #0:0: Audio: vorbis (libvorbis), 44100 Hz, stereo, fltp
  
    Metadata:
  
        encoder         : Lavc56.26.100 libvorbis
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> vorbis (libvorbis))
  
  Press [q] to stop, [?] for help
  
  size=       4kB time=00:00:01.00 bitrate=  35.0kbits/s    
  
  size=      27kB time=00:00:02.01 bitrate= 107.8kbits/s    
  
  size=      48kB time=00:00:03.04 bitrate= 129.3kbits/s    
  
  size=      70kB time=00:00:04.06 bitrate= 140.3kbits/s    
  
  size=      91kB time=00:00:05.14 bitrate= 144.9kbits/s    
  
  size=     113kB time=00:00:06.15 bitrate= 149.7kbits/s    
  
  video:0kB audio:344kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 1.994279%

  Edit : here is the result file : Test.ogg

  Edit 2 : Maybe there can be a problem with standard MediaPlayer but another Ogg file is played correctly.

• fail continuous transfer video file into buffer

  9 décembre 2016, par chintitomasud

  here I want to process a video file transcoding on demand by using ffmpeg but I failed. without ffmpeg all code runs properly. but using ffmpeg I face some problem. it shows this message :

  Spawning new process /samiul113039/1080.mp4:GET
  piping ffmpeg output to client, pid 10016
  HTTP connection disrupted, killing ffmpeg : 10016
  Spawning new process /samiul113039/1080.mp4:GET
  piping ffmpeg output to client, pid 4796
  HTTP connection disrupted, killing ffmpeg : 4796
  ffmpeg didn’t quit on q, sending signals
  ffmpeg has exited : 10016, code null
  ffmpeg didn’t quit on q, sending signals
  ffmpeg has exited : 4796, code nul
  

  var fs=require('fs');
  
  
  
  var url=require("url");
  
  var urlvalue="http://csestudents.uiu.ac.bd/samiul113039/1080.mp4";
  
  
  
  
  
  var parseurl=url.parse(urlvalue);
  
  
  
  var HDHomeRunIP = parseurl.hostname;
  
  var HDHomeRunPort = parseurl.port;
  
  var childKillTimeoutMs = 1000;
  
  
  
  var parseArgs = require('minimist')(process.argv.slice(2));
  
  
  
  // define startsWith for string
  
  if (typeof String.prototype.startsWith != 'function') {
  
    // see below for better implementation!
  
    String.prototype.startsWith = function (str){
  
      return this.indexOf(str) == 0;
  
    };
  
  }
  
  // Called when the response object fires the 'close' handler, kills ffmpeg 
  
  function responseCloseHandler(command) {
  
    if (command.exited != true) {
  
      console.log('HTTP connection disrupted, killing ffmpeg: ' + command.pid);
  
      // Send a 'q' which signals ffmpeg to quit. 
  
      // Then wait half a second, send a nice signal, wait another half second
  
      // and send SIGKILL
  
      command.stdin.write('q\n');
  
      command.stdin.destroy();
  
      // install timeout and wait
  
      setTimeout(function() {
  
        if (command.exited != true) {
  
          console.log('ffmpeg didn\'t quit on q, sending signals');
  
          // still connected, do safe sig kills
  
          command.kill();
  
          try { 
  
            command.kill('SIGQUIT');
  
          } catch (err) {}
  
          try {
  
            command.kill('SIGINT');
  
          } catch (err) {} 
  
          // wait some more!
  
          setTimeout(function() {
  
            if (command.exited != true) {
  
              console.log('ffmpeg didn\'t quit on signals, sending SIGKILL');
  
              // at this point, just give up and whack it
  
              try {
  
                command.kill('SIGKILL');
  
              } catch (err) {}
  
            }
  
          }, childKillTimeoutMs);
  
        }    
  
      }, childKillTimeoutMs);
  
    }
  
  }
  
  
  
  // Performs a proxy. Copies data from proxy_request into response
  
  function doProxy(request,response,http,options) {
  
    var proxy_request = http.request(options, function (proxy_response) {
  
      proxy_response.on('data', function(chunk) {
  
        response.write(chunk, 'binary');
  
      });
  
      proxy_response.on('end', function() {
  
        response.end();
  
      });
  
      response.writeHead(proxy_response.statusCode, proxy_response.headers);
  
    });
  
    request.on('data', function(chunk) {
  
      proxy_request.write(chunk, 'binary');
  
    });
  
    // error handler
  
    proxy_request.on('error', function(e) {
  
      console.log('problem with request: ' + e.message);
  
      response.writeHeader(500);
  
      response.end();
  
    });
  
  
  
    proxy_request.end();
  
  }
  
  
  
  var child_process = require('child_process');
  
  var auth = require('./auth');
  
  // Performs the transcoding after the URL is validated
  
  function doTranscode(request,response) {
  
    //res.setHeader("Accept-Ranges", "bytes");
  
    response.setHeader("Accept-Ranges", "bytes");
  
    response.setHeader("Content-Type", "video/mp4");        
  
    response.setHeader("Connection","close");
  
    response.setHeader("Cache-Control","no-cache");
  
    response.setHeader("Pragma","no-cache");
  
  
  
    // always write the header
  
    response.writeHeader(200);
  
  
  
    // if get, spawn command stream it
  
    if (request.method == 'GET') {
  
      console.log('Spawning new process ' + request.url + ":" + request.method);
  
  
  
  var command = child_process.spawn('ffmpeg', 
  
                                        ['-i','http://csestudents.uiu.ac.bd/samiul113039/1080.mp4','-f','mpegts','-'],
  
                                        { stdio: ['pipe','pipe','ignore'] }); 
  
  
  
       command.exited = false;
  
      // handler for when ffmpeg dies unexpectedly
  
      command.on('exit',function(code,signal) {
  
        console.log('ffmpeg has exited: ' + command.pid + ", code " + code);
  
        // set flag saying we've quit
  
        command.exited = true;
  
        response.end();
  
      });
  
      command.on('error',function(error) {
  
        console.log('ffmpeg error handler - unable to kill: ' + command.pid);
  
        // on well, might as well give up
  
        command.exited = true;
  
        try {
  
          command.stdin.close(); 
  
        } catch (err) {}
  
        try {
  
          command.stdout.close();
  
        } catch (err) {}
  
        try {
  
          command.stderr.close();
  
        } catch (err) {}
  
        response.end();
  
      });
  
      // handler for when client closes the URL connection - stop ffmpeg
  
      response.on('end',function() { 
  
       responseCloseHandler(command);
  
      });
  
      // handler for when client closes the URL connection - stop ffmpeg
  
      response.on('close',function() { 
  
        responseCloseHandler(command); 
  
      });
  
  
  
      // now stream
  
      console.log('piping ffmpeg output to client, pid ' + command.pid);
  
      command.stdout.pipe(response);
  
      command.stdin.on('error',function(err) {
  
        console.log("Weird error in stdin pipe ", err);
  
        response.end();
  
      });
  
      command.stdout.on('error',function(err) {
  
        console.log("Weird error in stdout pipe ",err);
  
        response.end();
  
      });
  
    } 
  
    else {
  
      // not GET, so close response
  
      response.end();
  
    }
  
  }
  
  
  
  // Load the http module to create an http server.
  
  var http = require('http');
  
  
  
  // Configure our HTTP server to respond with Hello World to all requests.
  
  var server = http.createServer(function (request, response) {
  
    //console.log("New connection from " + request.socket.remoteAddress + ":" + request.url);
  
  
  
    if (auth.validate(request,response)) {
  
      // first send a HEAD request to our HD Home Run with the same url to see if the address is valid.
  
      // This prevents an ffmpeg instance to spawn when clients request invalid things - like robots.txt/etc
  
      var options = {method: 'HEAD', hostname: HDHomeRunIP, port: HDHomeRunPort, path: request.url};
  
      var req = http.request(options, function(res) {
  
        // if they do a get, and it returns good status
  
        if (request.method == "GET" &&
  
            res.statusCode == 200 &&
  
            res.headers["content-type"] != null &&
  
            res.headers["content-type"].startsWith("video")) {
  
          // transcode is possible, start it now!
  
          doTranscode(request,response);
  
        } 
  
        else {
  
          // no video or error, cannot transcode, just forward the response from the HD Home run to the client
  
          if (request.method == "HEAD") {
  
            response.writeHead(res.statusCode,res.headers);
  
            response.end();
  
          }
  
          else {
  
            // do a 301 redirect and have the device response directly  
  
  
  
            // just proxy it, that way browser doesn't redirect to HDHomeRun IP but keeps the node.js server IP
  
            options = {method: request.method, hostname: HDHomeRunIP, /* port: HDHomeRunPort, */path: request.url};
  
            doProxy(request,response,http,options);
  
          }
  
        }
  
      });
  
      req.on('error', function(e) {
  
        console.log('problem with request: ' + e.message);
  
        response.writeHeader(500);
  
        response.end();
  
      });
  
      // finish the client request, rest of processing done in the async callbacks
  
      req.end();
  
    }
  
  });
  
  
  
  // turn on no delay for tcp
  
  server.on('connection', function (socket) {
  
    socket.setNoDelay(true);
  
  });
  
  server.listen(7000);

• ffmpeg - Concat multi mp4 files with audio file not working

  29 mars 2017, par Thanh Dao

  I follow this thread to concat multi mp4 files with audio file.
  But its not success. Have a lots error notifications had been displayed. I dont know how to fix it.
  Below is my command :

  "ffmpeg" -f concat -safe 0 \
  
  -i /path/to/text.txt \
  
  -i /path/to/audio.mp3 -vsync vfr -vf scale="640:640" -pix_fmt yuv420p \
  
  /path/to/output.mp4 2>&1

  The detail contents of text.txt

  file '/path/to/file1.mp4'
  
  file '/path/to/file2.mp4'
  
  file '/path/to/file3.mp4'
  
  file '/path/to/file4.mp4'
  
  file '/path/to/file5.mp4'
  
  file '/path/to/file6.mp4'
  
  file '/path/to/file7.mp4'
  
  file '/path/to/file8.mp4'
  
  file '/path/to/file9.mp4'
  
  file '/path/to/file10.mp4'
  
  file '/path/to/file11.mp4'
  
  file '/path/to/file12.mp4'
  
  file '/path/to/file13.mp4'
  
  file '/path/to/file14.mp4'
  
  file '/path/to/file15.mp4'
  
  file '/path/to/file16.mp4'
  
  file '/path/to/file17.mp4'
  
  file '/path/to/file18.mp4'

  And some lines of output errors :

  [concat @ 0x357e620] DTS 192000 < 229888 out of order
  
  [h264 @ 0x36920e0] top block unavailable for requested intra mode -1
  
  [h264 @ 0x36920e0] error while decoding MB 32 0
  
  [h264 @ 0x36920e0] concealing 2025 DC, 2025 AC, 2025 MV errors in I frame
  
  [h264 @ 0x36b7a80] concealing 1449 DC, 1449 AC, 1449 MV errors in P frame
  
  [h264 @ 0x36ff440] corrupted macroblock 26 1 (total_coeff=-1)
  
  [h264 @ 0x36ff440] error while decoding MB 26 1
  
  [h264 @ 0x36ff440] concealing 2003 DC, 2003 AC, 2003 MV errors in P frame
  
  [h264 @ 0x371af40] concealing 1456 DC, 1456 AC, 1456 MV errors in P frame
  
  [h264 @ 0x3736a40] ref 5 overflow
  
  [h264 @ 0x3736a40] error while decoding MB 1 1
  
  [h264 @ 0x3736a40] concealing 2025 DC, 2025 AC, 2025 MV errors in P frame
  
  [h264 @ 0x3752520] concealing 1449 DC, 1449 AC, 1449 MV errors in P frame
  
  [h264 @ 0x376dfa0] P sub_mb_type 8 out of range at 2 1
  
  [h264 @ 0x376dfa0] error while decoding MB 2 1
  
  [h264 @ 0x376dfa0] concealing 2025 DC, 2025 AC, 2025 MV errors in P frame
  
  [h264 @ 0x37a55a0] ref 6 overflow
  
  [h264 @ 0x37a55a0] error while decoding MB 3 1
  
  [h264 @ 0x37a55a0] concealing 2025 DC, 2025 AC, 2025 MV errors in P frame
  
  [h264 @ 0x3789aa0] concealing 1449 DC, 1449 AC, 1449 MV errors in P frame
  
  [h264 @ 0x36b7a80] ref 5 overflow
  
  [h264 @ 0x36b7a80] error while decoding MB 4 1
  
  [h264 @ 0x36b7a80] concealing 2025 DC, 2025 AC, 2025 MV errors in P frame
  
  [h264 @ 0x36920e0] concealing 1449 DC, 1449 AC, 1449 MV errors in P frame