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• How to decode audiostream to play with AudioUnits ?

  4 décembre 2015, par sadhi

  I have a PCM ulaw stream that I receive and I want to play this on iOS. To play audio in my app I made an AudioUnit implementation, but since it requires linear PCM I must decode it first. For this I use ffmpeg with the following code:

          AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_PCM_MULAW);
  
          self.audio_codec_context = avcodec_alloc_context3(codec);
          self.audio_codec_context->codec_type = AVMEDIA_TYPE_AUDIO;
          self.audio_codec_context->sample_fmt = *codec->sample_fmts;
          self.audio_codec_context->sample_rate = 48000;
          self.audio_codec_context->channels    = 1;
          //open codec
          int result = avcodec_open2(self.audio_codec_context, codec,NULL);            
  
          //this should hold the raw data
          AVFrame * audioFrm = av_frame_alloc();
  
          AVPacket pkt;
          av_init_packet(&pkt);
          pkt.data = (unsigned char*)buf;
          pkt.size = ret;
          pkt.flags = AV_PKT_FLAG_KEY;
  
          int got_packet;
          result = avcodec_decode_audio4(self.audio_codec_context, audioFrm, &got_packet, &pkt);
  
          AVPacket encodedPkt;
          av_init_packet(&encodedPkt);
          encodedPkt.size = 0;
          encodedPkt.data = NULL;
  
          if (audioFrm != NULL) {
              self.audio_codec_context = NULL;
              AVCodec *codec = avcodec_find_encoder(AV_CODEC_ID_PCM_S16LE);
  
              self.audio_codec_context = avcodec_alloc_context3(codec);
              self.audio_codec_context->codec_type = AVMEDIA_TYPE_AUDIO;
              self.audio_codec_context->sample_fmt = *codec->sample_fmts;
              self.audio_codec_context->bit_rate = 64000;
              self.audio_codec_context->sample_rate = 48000;
              self.audio_codec_context->channels    = 1;
  
  
              int result = avcodec_open2(self.audio_codec_context, codec,NULL);
              if (result < 0) {
                  NSLog(@"avcodec_open2 returned %i", result);
              }
  
  
              result = avcodec_encode_audio2(self.audio_codec_context, &encodedPkt, audioFrm, &got_packet);
  
              if (result < 0) {
                  NSLog(@"avcodec_encode_audio2 returned %s", av_err2str (result));
                  continue;
              }
          }
  

  For some reason no matter what I do the audio that comes out at the end is all noise. So my question is: How should I decode my audiostrean to play it with AudioUnits?

• Combine 2 .FLV videos

  4 décembre 2015, par Rune

  For the last 4 hours I've been trying to combine 2 .flv files into one using ffmpeg (or well, just C# in general).

  Here's what I got so far: I've converted both the videos to .mp4 videos:

  "-i " + videoFileLocation + " -c copy -copyts " + newConvertedFileLocation
  

  I have then combined the two .mp4 files into a single one using: (txtPath is the text file with the two mp4 file locations)

  "-f concat -i " + txtPath + " -c copy " + saveLocation
  

  This ends up with an mp4 file which contains the combination of both the videos BUT with the following fault:

  The length of the first video is 0:05

  The length of the second video is 6:11

  However the length of the combined video is for some reason 07:51 - thus the video runs at a slower pace than it should.

  Furthermore the audio is async with the video.

  What am I doing wrong here?

  I haven't used ffmpeg before and I just wanna get this working.

  Any help is greatly appreciated!

  As requested here is the output from running 'ffmpeg -i input1.flv -i input2.flv':

  ffmpeg version 2.7 Copyright (c) 2000-2015 the FFmpeg developers   built with gcc 4.9.2 (GCC)...
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'filepath\input1.flv':   Metadata:
      major_brand     : isom
      minor_version   : 512
      compatible_brands: isomiso2avc1mp41
      creation_time   : 1970-01-01 00:00:00
      encoder         : Lavf53.24.2   Duration: 00:00:05.31, start: 0.000000, bitrate: 1589 kb/s
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
      Metadata:
        creation_time   : 1970-01-01 00:00:00
        handler_name    : VideoHandler
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 384 kb/s (default)
      Metadata:
        creation_time   : 1970-01-01 00:00:00
        handler_name    : SoundHandler Input #1, flv, from 'filepath\input2.flv':   Metadata:
      audiosize       : 4476626
      canSeekToEnd    : true
      datasize        : 23876671
      videosize       : 19004263
      hasAudio        : true
      hasCuePoints    : false
      hasKeyframes    : true
      hasMetadata     : true
      hasVideo        : true
      lasttimestamp   : 372
      metadatacreator : flvtool++ (Facebook, Motion project, dweatherford)
      totalframes     : 9298
      encoder         : Lavf56.36.100   Duration: 00:06:11.92, start: 0.080000, bitrate: 513 kb/s
      Stream #1:0: Video: h264 (High), yuv420p, 646x364 [SAR 1:1 DAR 323:182], 400 kb/s, 25 fps, 25 tbr, 1k tbn, 50 tbc
      Stream #1:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 96 kb/s At least one output file must be specified
  

• FFmpeg4Android : How to select videos from gallery ?

  4 décembre 2015, par marian

  I have created an app using FFmpeg4Android library. I would like to add watermark into videos using ffmpeg. Command for adding watermark is working fine but the coding has pre-fixed video name in the command. I would like to choose videos from gallery folder and then add watermark to the videos. I do not know how to add intent for choosing videos with FFmpeg. I have tried to add the intent like this replacing the in.mp4 with PICK_FROM_GALLERY intent:

   private void runTranscodingUsingLoader() {
      Log.i(Prefs.TAG, "runTranscodingUsingLoader started...");
  
      PowerManager powerManager = (PowerManager)ProgressBarExample.this.getSystemService(Activity.POWER_SERVICE);
      WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
      Log.d(Prefs.TAG, "Acquire wake lock");
      wakeLock.acquire();
  
      Intent intent = new Intent();
  
      intent.setType("video/*");
      intent.setAction(Intent.ACTION_GET_CONTENT);
  
      startActivityForResult(Intent.createChooser(intent, "Complete action using"), PICK_FROM_GALLERY);
  
  
      String[] complexCommand = {"ffmpeg","-y" ,"-i", String.valueOf(PICK_FROM_GALLERY),"-strict","experimental",
              "-vf", "movie=/sdcard/videokit/watermark.png [watermark];" +
              " [in][watermark] overlay=main_w-overlay_w-10:10 [out]","-s",
              "320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab",
              "48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out1.mp4"};
  

  It opens the gallery but the watermarking command doesnt get executed in the selected video. Can someone help me to resolve this issue. I could not find proper references/examples regarding this. My full coding is as follows.

  public class ProgressBarExample extends Activity  {
  
  public ProgressDialog progressBar;
  
  String workFolder = null;
  String demoVideoFolder = null;
  String demoVideoPath = null;
  String vkLogPath = null;
  LoadJNI vk;
  private final int STOP_TRANSCODING_MSG = -1;
  private final int FINISHED_TRANSCODING_MSG = 0;
  private boolean commandValidationFailedFlag = false;
  private static final int PICK_FROM_GALLERY = 1;
  
  private void runTranscodingUsingLoader() {
      Log.i(Prefs.TAG, "runTranscodingUsingLoader started...");
  
      PowerManager powerManager = (PowerManager)ProgressBarExample.this.getSystemService(Activity.POWER_SERVICE);
      WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
      Log.d(Prefs.TAG, "Acquire wake lock");
      wakeLock.acquire();
  
  
  
  
      String[] complexCommand = {"ffmpeg","-y" ,"-i", "/sdcard/videokit/in.mp4","-strict","experimental",
              "-vf", "movie=/sdcard/videokit/watermark.png [watermark];" +
              " [in][watermark] overlay=main_w-overlay_w-10:10 [out]","-s",
              "320x240","-r", "30", "-b", "15496k", "-vcodec", "mpeg4","-ab",
              "48000", "-ac", "2", "-ar", "22050", "/sdcard/videokit/out1.mp4"};
      ///////////////////////////////////////////////////////////////////////
  
  
      vk = new LoadJNI();
      try {
          // running complex command with validation
          vk.run(complexCommand, workFolder, getApplicationContext());
  
          // running without command validation
          //vk.run(complexCommand, workFolder, getApplicationContext(), false);
  
          // running regular command with validation
          //vk.run(GeneralUtils.utilConvertToComplex(commandStr), workFolder, getApplicationContext());
  
          Log.i(Prefs.TAG, "vk.run finished.");
          // copying vk.log (internal native log) to the videokit folder
          GeneralUtils.copyFileToFolder(vkLogPath, demoVideoFolder);
  
      } catch (CommandValidationException e) {
          Log.e(Prefs.TAG, "vk run exeption.", e);
          commandValidationFailedFlag = true;
  
      } catch (Throwable e) {
          Log.e(Prefs.TAG, "vk run exeption.", e);
      }
      finally {
          if (wakeLock.isHeld()) {
              wakeLock.release();
              Log.i(Prefs.TAG, "Wake lock released");
          }
          else{
              Log.i(Prefs.TAG, "Wake lock is already released, doing nothing");
          }
      }
  
      // finished Toast
      String rc = null;
      if (commandValidationFailedFlag) {
          rc = "Command Vaidation Failed";
      }
      else {
          rc = GeneralUtils.getReturnCodeFromLog(vkLogPath);
      }
      final String status = rc;
      ProgressBarExample.this.runOnUiThread(new Runnable() {
          public void run() {
              Toast.makeText(ProgressBarExample.this, status, Toast.LENGTH_LONG).show();
              if (status.equals("Transcoding Status: Failed")) {
                  Toast.makeText(ProgressBarExample.this, "Check: " + vkLogPath + " for more information.", Toast.LENGTH_LONG).show();
              }
          }
      });
  }
  
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      Log.i(Prefs.TAG, "onCreate ffmpeg4android ProgressBarExample");
  
      super.onCreate(savedInstanceState);
      setContentView(R.layout.ffmpeg_demo_client_2);
  
      demoVideoFolder = Environment.getExternalStorageDirectory().getAbsolutePath() + "/videokit/";
      demoVideoPath = demoVideoFolder + "in.mp4";
  
      Log.i(Prefs.TAG, getString(R.string.app_name) + " version: " + GeneralUtils.getVersionName(getApplicationContext()) );
  
      Button invoke =  (Button)findViewById(R.id.invokeButton);
      invoke.setOnClickListener(new OnClickListener() {
          public void onClick(View v){
              Log.i(Prefs.TAG, "run clicked.");
              runTranscoding();
          }
      });
  
      workFolder = getApplicationContext().getFilesDir() + "/";
      Log.i(Prefs.TAG, "workFolder (license and logs location) path: " + workFolder);
      vkLogPath = workFolder + "vk.log";
      Log.i(Prefs.TAG, "vk log (native log) path: " + vkLogPath);
      GeneralUtils.copyLicenseFromAssetsToSDIfNeeded(this, workFolder);
      GeneralUtils.copyDemoVideoFromAssetsToSDIfNeeded(this, demoVideoFolder);
      int rc = GeneralUtils.isLicenseValid(getApplicationContext(), workFolder);
      Log.i(Prefs.TAG, "License check RC: " + rc);
  }
  
  
  
  private Handler handler = new Handler() {
      @Override
      public void handleMessage(Message msg) {
          Log.i(Prefs.TAG, "Handler got message");
          if (progressBar != null) {
              progressBar.dismiss();
  
              // stopping the transcoding native
              if (msg.what == STOP_TRANSCODING_MSG) {
                  Log.i(Prefs.TAG, "Got cancel message, calling fexit");
                  vk.fExit(getApplicationContext());
  
  
              }
          }
      }
  };
  
  public void runTranscoding() {
      progressBar = new ProgressDialog(ProgressBarExample.this);
      progressBar.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
      progressBar.setTitle("FFmpeg4Android Direct JNI");
      progressBar.setMessage("Press the cancel button to end the operation");
      progressBar.setMax(100);
      progressBar.setProgress(0);
  
      progressBar.setCancelable(false);
      progressBar.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int which) {
              handler.sendEmptyMessage(STOP_TRANSCODING_MSG);
          }
      });
  
      progressBar.show();
  
      new Thread() {
          public void run() {
              Log.d(Prefs.TAG,"Worker started");
              try {
                  //sleep(5000);
                  runTranscodingUsingLoader();
                  handler.sendEmptyMessage(FINISHED_TRANSCODING_MSG);
  
              } catch(Exception e) {
                  Log.e("threadmessage",e.getMessage());
              }
          }
      }.start();
  
      // Progress update thread
      new Thread() {
          ProgressCalculator pc = new ProgressCalculator(vkLogPath);
          public void run() {
              Log.d(Prefs.TAG,"Progress update started");
              int progress = -1;
              try {
                  while (true) {
                      sleep(300);
                      progress = pc.calcProgress();
                      if (progress != 0 && progress < 100) {
                          progressBar.setProgress(progress);
                      }
                      else if (progress == 100) {
                          Log.i(Prefs.TAG, "==== progress is 100, exiting Progress update thread");
                          pc.initCalcParamsForNextInter();
                          break;
                      }
                  }
  
              } catch(Exception e) {
                  Log.e("threadmessage",e.getMessage());
              }
          }
      }.start();
  }
  
  }
  

  Any help/guidance would be really helpful. Thank you.

• FFmpeg : Error occurred while encoding audio stream from ac3 to aac

  4 décembre 2015, par akki_2891

  I am using following command to encode my video to h264 and aac audio codec :

  ffmpeg -i sample.mp4 -codec:v libx264 -profile:v high -level:v 4.0 -codec:a libvo_aacenc -b:a 128k output_file.mp4
  

  Following is a trace of the error i am getting at the console.

  Input #0, mpegts, from 'sample.mp4':
    Duration: 00:00:58.08, start: 1.000033, bitrate: 17290 kb/s
    Program 1
      Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1920x1
  080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
      Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fl
  tp, 448 kb/s
      Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
  [libx264 @ 003dc660] using SAR=1/1
  [libx264 @ 003dc660] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  [libx264 @ 003dc660] profile High, level 4.0
  [libx264 @ 003dc660] 264 - core 130 r2274 c832fe9 - H.264/MPEG-4 AVC codec - Cop
  yright 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 de
  block=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 chr
  oma_qp_offset=-2 threads=12 lookahead_threads=2 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=250 keyint_min=25 scen
  ecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmi
  n=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  [libvo_aacenc @ 03c3c640] Unable to set encoding parameters
  Output #0, mp4, to 'output_file.mp4':
      Stream #0:0: Video: h264, yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 90
  k tbn, 29.97 tbc
      Stream #0:1: Audio: aac, 48000 Hz, 5.1(side), s16, 128 kb/s
  Stream mapping:
    Stream #0:0 -> #0:0 (h264 -> libx264)
    Stream #0:1 -> #0:1 (ac3 -> libvo_aacenc)
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters
  such as bit_rate, rate, width or height
  

  I am really not able to find what possibly could be wrong. I dont want to copy audio codec , i wish to encode it from ac3 to aac

  Also any suggestion to make it lossless

• ffmpeg Error while opening enconder for output stream [duplicate]

  4 décembre 2015, par user650922

  This question already has an answer here:

  • FFmpeg : Error occurred while encoding audio stream from ac3 to aac 1 answer

  As a testing purpose I am converting .mp4 video to .mp4.

  The error message is "Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height".

  Could someone please help me in finding the reason behind below error.

  Below is my terminal log.

  C:\Users\work\Downloads\ffmpeg-20151130-git-7b11eea-win64-static\ffmpeg-20151130
  -git-7b11eea-win64-static\bin
  >ffmpeg -i C:\Users\work\Desktop\Esocializ\Sample.mp4 C:\Users\work\Desktop\Esoc
  ializ\Sample1.mp4
  ffmpeg version N-76957-g7b11eea Copyright (c) 2000-2015 the FFmpeg developers
    built with gcc 5.2.0 (GCC)
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --
  enable-lzma --enable-decklink --enable-zlib
    libavutil      55.  9.100 / 55.  9.100
    libavcodec     57. 16.101 / 57. 16.101
    libavformat    57. 19.100 / 57. 19.100
    libavdevice    57.  0.100 / 57.  0.100
    libavfilter     6. 17.100 /  6. 17.100
    libswscale      4.  0.100 /  4.  0.100
    libswresample   2.  0.101 /  2.  0.101
    libpostproc    54.  0.100 / 54.  0.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\work\Desktop\Esocializ\Sample.
  mp4':
    Metadata:
      major_brand     : isom
      minor_version   : 512
      compatible_brands: isomiso2avc1mp41
      creation_time   : 1970-01-01 00:00:00
      encoder         : Lavf53.24.2
    Duration: 00:00:05.31, start: 0.000000, bitrate: 1589 kb/s
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720
  [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
      Metadata:
        creation_time   : 1970-01-01 00:00:00
        handler_name    : VideoHandler
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp,
  384 kb/s (default)
      Metadata:
        creation_time   : 1970-01-01 00:00:00
        handler_name    : SoundHandler
  [libx264 @ 000000c07583dde0] using SAR=1/1
  [libx264 @ 000000c07583dde0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  [libx264 @ 000000c07583dde0] profile High, level 3.1
  [libx264 @ 000000c07583dde0] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC cod
  ec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 r
  ef=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_pski
  p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 dec
  imate=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=250 keyint_min=
  25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.
  60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  [libvo_aacenc @ 000000c0758d6da0] Unable to set encoding parameters
  Output #0, mp4, to 'C:\Users\work\Desktop\Esocializ\Sample1.mp4':
    Metadata:
      major_brand     : isom
      minor_version   : 512
      compatible_brands: isomiso2avc1mp41
      encoder         : Lavf53.24.2
      Stream #0:0(und): Video: h264 (libx264), yuv420p, 1280x720 [SAR 1:1 DAR 16:9
  ], q=-1--1, 25 fps, 25 tbn, 25 tbc (default)
      Metadata:
        creation_time   : 1970-01-01 00:00:00
        handler_name    : VideoHandler
        encoder         : Lavc57.16.101 libx264
      Stream #0:1(und): Audio: aac, 0 channels, 128 kb/s (default)
      Metadata:
        creation_time   : 1970-01-01 00:00:00
        handler_name    : SoundHandler
        encoder         : Lavc57.16.101 libvo_aacenc
  Stream mapping:
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters
  such as bit_rate, rate, width or height
  
  C:\Users\work\Downloads\ffmpeg-20151130-git-7b11eea-win64-static\ffmpeg-20151130
  -git-7b11eea-win64-static\bin
  >