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• Record video with Media Recorder in WEBM format

  21 mai 2017, par Matho

  I need to record two videos via media recorder and process them with ffmpeg in Android. I want to read videos via pipe in ffmpeg command string. From what I have read, I could not use 3GPP/MP4 format, because these formats contains header at the end of video. Because of it, I want to use WEBM video format, but my app is crashing, when I use webm/vp8 setting in media recorder. Ffmpeg I’m using is : com.writingminds:FFmpegAndroid:0.3.2. Could you help me please ?

  RecorderPrepareTask :

  class RecorderPrepareTask extends AsyncTask {
  
  private Context mContext;
  
  
  
  public RecorderPrepareTask(Context context) {
  
      mContext = context;
  
  }
  
  
  
  @Override
  
  protected Boolean doInBackground(Void... voids) {
  
      Timber.d("Starting screen recording...");
  
  
  
      if (!outputRoot.exists() && !outputRoot.mkdirs()) {
  
          Timber.e("Unable to create output directory '%s'.", outputRoot.getAbsolutePath());
  
          return false;
  
      }
  
  
  
      recorder = new MediaRecorder();
  
      recorder.setVideoSource(SURFACE);
  
      recorder.setOutputFormat(MediaRecorder.OutputFormat.WEBM);
  
      recorder.setVideoEncoder(MediaRecorder.VideoEncoder.VP8);
  
      recorder.setVideoSize(Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H);
  
      recorder.setVideoFrameRate(Config.FRAME_RATE);
  
  
  
      Timber.i("Output file '%s'.", outputFileName);
  
      recorder.setOutputFile(RecordingActivity.pipe[1].getFileDescriptor());
  
  
  
  
  
      try {
  
          recorder.prepare();
  
      } catch (IOException e) {
  
          throw new RuntimeException("Unable to prepare MediaRecorder.", e);
  
      }
  
  
  
  
  
      projection = projectionManager.getMediaProjection(resultCode, data);
  
  
  
      Surface surface = recorder.getSurface();
  
      display = projection.createVirtualDisplay(DISPLAY_NAME, Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H, 560, VIRTUAL_DISPLAY_FLAG_PRESENTATION, surface, null, null);
  
  
  
      recorder.start();
  
  
  
      return true;
  
  }
  
  
  
  @Override
  
  protected void onPostExecute(Boolean result) {
  
  
  
  }

  }

  getConvertCmd :

  private String getConvertCmd(){
  
      return "-re -r 30 -f webm -c:v vp8 -i pipe:"+ RecordingActivity.pipe[0].getFd() + " -threads 2 -preset ultrafast -profile:v main -level 3.1 -b:v 440k -ar 44100 -ab 128k -s "+ Config.CAMERA_VIDEO_SIZE_W + "x" + Config.CAMERA_VIDEO_SIZE_H + " -vcodec vp8 -acodec vorbis " + outputFileName3;
  
  }

  Logs :

  D/SoftVPXEncoder: VP8: internalSetAndroidVp8Params. BRMode: 0. TS: 0. KF: 24. QP: 0 - 0 BR0: 100. BR1: 0. BR2: 0
  
  I/ACodec: setupVideoEncoder succeeded
  
  E/OMXNodeInstance: setConfig(1a:google.vp8.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
  
  I/ACodec: codec does not support config priority (err -2147483648)
  
  W/ACodec: do not know color format 0x7f000789 = 2130708361
  
  I/SoftMPEG4Encoder: Construct SoftMPEG4Encoder
  
  I/MediaCodec: MediaCodec will operate in async mode
  
  E/OMXNodeInstance: getParameter(1b:google.mpeg4.encoder, ParamVideoErrorCorrection(0x6000007)) ERROR: NotImplemented(0x80001006)
  
  I/ACodec: setupVideoEncoder succeeded
  
  E/OMXNodeInstance: setConfig(1b:google.mpeg4.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
  
  I/ACodec: codec does not support config priority (err -2147483648)
  
  D/SoftVPXEncoder: VP8: initEncoder. BRMode: 0. TSLayers: 0. KF: 24. QP: 0 - 0
  
  I/AudioFlinger: AudioFlinger's thread 0xb2440000 ready to run
  
  xW/AudioFlinger: acquireAudioSessionId() unknown client 10079 for session 7
  
  I/MediaCodec: MediaCodec will operate in async mode
  
  /system_process I/DisplayManagerService: Display device added: DisplayDeviceInfo{"RMR": uniqueId="virtual:sk.matho.rocket_monkeys.rocketmonkeysrecorder,10052,RMR,0", 480 x 640, modeId 6, defaultModeId 6, supportedModes [{id=6, width=480, height=640, fps=60.0}], density 560, 560.0 x 560.0 dpi, appVsyncOff 0, presDeadline 16666666, touch NONE, rotation 0, type VIRTUAL, state ON, owner sk.matho.rocket_monkeys.rocketmonkeysrecorder (uid 10052), FLAG_PRIVATE, FLAG_PRESENTATION}
  
  E/OMXNodeInstance: setConfig(1c:google.amrnb.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
  
  I/ACodec: codec does not support config priority (err -2147483648)
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x10003 imply creation of host color buffer
  
  I/MediaCodecSource: MediaCodecSource (video) starting
  
  I/MediaCodecSource: MediaCodecSource (video) started
  
  D/MPEG4Writer: Video track stopping
  
  E/MPEG4Writer: Stop() called but track is not started
  
  D/MPEG4Writer: Audio track stopping
  
  E/MPEG4Writer: Stop() called but track is not started
  
  
  
  [ 05-21 13:03:44.101  9757: 9766 D/         ]
  
  HostConnection::get() New Host Connection established 0xb344f140, tid 9766
  
  /sk.matho.rocket_monkeys.rocketmonkeysrecorder E/MediaRecorder: start failed: -2147483648                                                                                                  
  
  /sk.matho.rocket_monkeys.rocketmonkeysrecorder E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #2
  
  Process: sk.matho.rocket_monkeys.rocketmonkeysrecorder, PID: 10079
  
  java.lang.RuntimeException: An error occurred while executing doInBackground()
  
  at android.os.AsyncTask$3.done(AsyncTask.java:309)
  
  at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
  
  at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
  
  at java.util.concurrent.FutureTask.run(FutureTask.java:242)
  
  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
  
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
  
  at java.lang.Thread.run(Thread.java:818)
  
  Caused by: java.lang.RuntimeException: start failed.
  
  at android.media.MediaRecorder.start(Native Method)
  
  at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:181)
  
  at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:173)
  
  at android.os.AsyncTask$2.call(AsyncTask.java:295)
  
  at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  
  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
  
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
  
  at java.lang.Thread.run(Thread.java:818) 
  
  
  
  [ 05-21 13:03:44.109  9757:10315 D/         ]
  
  HostConnection::get() New Host Connection established 0xb307c1c0, tid 10315

• Some bugs when using SDL2 and ffmpeg to make a video player

  1er juin 2017, par trycatch

  used sws_scale to resize the image, and SDL2.0 to render, pixel format is YUV420P.

  1.When I Create SDL Render with SDL_RENDERER_SOFTWARE, I Get a black image like this :enter image description here, the top-left corner has a green point ;
  But When I Create SDL Render with SDL_RENDERER_ACCELERATED, I can See normal image ;

  2.When I resize the window, the player will crash on SDL_UpdateYUVTexture. I check width, height and linesize of the data, everything is OK.

  WHY ?

  Key Code :

  if (swscale_.frame.width % 2) 
  
    swscale_.frame.width -= 1;
  
  
  
  swscale_.free();
  
  swscale_.context = sws_getContext(
  
          vcodec->width, vcodec->height, vcodec->pix_fmt,
  
          swscale_.frame.width, swscale_.frame.height,
  
          AV_PIX_FMT_YUV420P, SWS_BICUBIC, nullptr, nullptr, nullptr);
  
  
  
  if (!swscale_.context)
  
      throw std::runtime_error("sws_getContext.");
  
  
  
  if (swscale_.frame.avframe)
  
    av_frame_free(&swscale_.frame.avframe);
  
  swscale_.frame.avframe = av_frame_alloc();
  
  unsigned char* out_buffer = (unsigned char *)av_malloc(av_image_get_buffer_size(AV_PIX_FMT_YUV420P, swscale_.frame.width, swscale_.frame.height, 1)+16);
  
  unsigned char* tmp = &out_buffer[16 - (unsigned long long)out_buffer % 16];
  
  av_image_fill_arrays(swscale_.frame.avframe->data, swscale_.frame.avframe->linesize, tmp,
  
    AV_PIX_FMT_YUV420P, swscale_.frame.width, swscale_.frame.height, 1);
  
  
  
  sws_scale(swscale_.context, (const unsigned char* const*)vframe_->data, vframe_->linesize, 
  
    0, vframe_->height,
  
    swscale_.frame.avframe->data, swscale_.frame.avframe->linesize);
  
  
  
  self.onRenderHandle(swscale_.frame);

  Code of SDL rendering :

  void Player::onRender(const frame& frame)
  
  {
  
    if (sdl_lock_.try_lock()) {
  
      ::ValidateRect(native_window_, NULL);
  
      if (frame.width != scr_width_ || frame.height != scr_height_) {
  
        scr_width_ = frame.width; scr_height_ = frame.height;
  
        SDL_SetWindowSize(screen_, scr_width_ + 2, scr_height_ + 2);
  
        SDL_DestroyRenderer(sdl_renderer_);
  
        sdl_renderer_ = SDL_CreateRenderer(screen_, -1, 0);
  
        video_texture_ = SDL_CreateTexture(sdl_renderer_, SDL_PIXELFORMAT_IYUV,
  
          SDL_TEXTUREACCESS_STREAMING, scr_width_, scr_height_);
  
      }
  
      SDL_UpdateYUVTexture(video_texture_, NULL,
  
        frame.avframe->data[0], frame.avframe->linesize[0],
  
        frame.avframe->data[1], frame.avframe->linesize[1],
  
        frame.avframe->data[2], frame.avframe->linesize[2]);
  
      sdl_lock_.unlock();
  
      ::InvalidateRect(native_window_, NULL, false);
  
    }
  
  }
  
  void Player::onPaint()
  
  {
  
    std::lock_guard lock(sdl_lock_);
  
    SDL_RenderClear(sdl_renderer_);
  
    SDL_RenderCopy(sdl_renderer_, video_texture_, NULL, NULL);
  
    SDL_RenderPresent(sdl_renderer_);
  
  }

• ffmpeg Unrecognized option 'hls_enc'

  16 juin 2017, par riubin

  Does anyone have a ffmpeg problem that Unrecognized option ’hls_enc’ ?

  when I use ffmpeg to convert videos to hls with option ’hls_enc’,followed the document : https://www.ffmpeg.org/ffmpeg-formats.html#Options-5
  but throw error:Unrecognized option ’hls_enc’

  Is it missing any configure options ?

  configuration : —enable-gpl —enable-nonfree —yasmexe=/data/ffmpeg.src/_release/bin/yasm —prefix=/data/ffmpeg.src/_release —cc= —enable-static —disable-shared —enable-debug —extra-cflags=’-I/data/ffmpeg.src/_release/include’ —extra-ldflags=’-L/data/ffmpeg.src/_release/lib -lm -ldl’ —enable-postproc —enable-bzlib —enable-zlib —enable-parsers —enable-pthreads —enable-libx264 —enable-libmp3lame —enable-libfdk_aac —enable-libspeex —extra-libs=-lpthread —enable-encoders —enable-decoders —enable-avfilter —enable-muxers —enable-demuxers