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• X264—Why does "—pass 1 —stats" make the file bigger ?

  4 mai 2016, par Codecodeup

  I am using --pass 1 --stats <stats file="file" location="location"></stats> to generate the stats file for H.264 encoding with x264. The command is like this :

  <x264 binary="binary"> <input file="file" /> -o <output file="file"> --preset veryslow --crf 27 
  
    --tune ssim  --scenecut 0 --pass 1 --stats <stats file="file" location="location">
  
  </stats></output></x264>

  When I ran this command with and without --pass 1 --stats <stats file="file" location="location"></stats>, the difference between the sizes of the final output files are very different. The one with --pass 1 --stats <stats file="file" location="location"></stats> is much bigger. What is the reason ? Thanks.

• ffmpeg merge video and audio + fade out

  1er mai 2016, par jacky brown

  I have one video file and one audio file.
  I want to merge them together that the final output video will be in the length of the video and will contain the audio in the background.

  i did :

  ffmpeg -i output.avi -i bgmusic.mp3 -filter_complex " [1:0] apad " -shortest out.avi

  but the background audio is cut in the end of the final merge movie.
  i want it to fade out nicely.

  how can i do it ??

  but the background audio is cut in the end of the final merge movie.
  i want it to fade out nicely.

  how can i do it ??

  thanks.

• Can VideoView be detach and reattached without stopping the stream ?

  1er juin 2015, par Thierry-Dimitri Roy

  I’m building an app where the user clicks on a button to show a video full screen. Initially the video is attached to a view inside a ViewPager. To be able to show it fullscreen I detach it from its parent and reattach it to the root view. This works fine, except when the video is switched to fullscreen while playing. When I detach a playing VideoView it just stop and I need to restart it. This is not acceptable since the video starts buffering before resume. Here the part of the code where the detach is done :

      final ViewGroup parent = (ViewGroup) findViewById(R.id.parent);
  
  
  
      final ViewGroup root = (ViewGroup) findViewById(R.id.root);
  
  
  
      Button b = (Button) findViewById(R.id.button);
  
      b.setOnClickListener(new OnClickListener() {
  
  
  
          @Override
  
          public void onClick(View v) {
  
              parent.removeView(mVideoView);
  
  
  
              LayoutParams lp = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
  
              root.addView(mVideoView, lp);
  
          }
  
      });

  Depending of the device, I have a different log error. Probably because the actual video player is provided by the manufacturer and not the Android SDK. Here are the error logs for a Nexus 7 :

  10-30 20:26:18.618: D/NvOsDebugPrintf(124): NvMMDecTVMRDestroyParser Begin 
  
  10-30 20:26:18.618: D/NvOsDebugPrintf(124): --------- Closing TVMR Frame Delivery Thread -------------
  
  10-30 20:26:18.678: D/NvOsDebugPrintf(124): ------- NvAvpClose -------
  
  10-30 20:26:18.678: D/NvOsDebugPrintf(124): NvMMDecTVMRDestroyParser Done 
  
  10-30 20:26:18.678: D/NvOsDebugPrintf(124): NvMMLiteTVMRDecPrivateClose Done 

  I haven’t been able to detach the video without stopping it. I tried using SurfaceView or TextureView without success.

  I also tried finding a third party video player. I found a commercial one (http://www.vitamio.org/) that I can’t really use for business reason. I found an open source one, that hasn’t been updated in the last year (https://code.google.com/p/dolphin-player/).

  I’m currently targeting Android 4.2 or better on tablet only.

  ---

  Note that the ViewPager is not fullscreen. So I can’t use LayoutParams to make the video fullscreen. I need to remove the VideoView from the parent in the ViewPager and add it to the root view to be able to show it fullscreen.

  The URL I’m testing with : http://bellvps1.cpl.delvenetworks.com/media/e1b3e24ecb944abd8f4ed823a0b76ddc/68f78d35296243bfb46d2418f03f2fd0/bande-annonce---the-secret-life-of-walter-mitty-1-9efcc5c6e52ac07a3edf84a1b21967995b7796a2.m3u8