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• How do I run the qt ffmpeg wrapper example ? (error : cannot find -lavutil)

  29 août 2013, par James

  I am using QT 4.8 on the raspberry pi trying to save a binary stream to a video file like mp4. I was able to create and save static images by converting it into a QImage, but QT does not seem to support actually saving that stream (or the series of QImages) to a video file.

  The only option I may have found is qt ffmpeg Wrapper
  https://code.google.com/p/qtffmpegwrapper/

  but the example won't run out of the box. I am having the same exact problem as this guy :

  https://code.google.com/p/qtffmpegwrapper/issues/detail?id=14&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20Opened%20Closed%20Modified#makechanges

  All I did was download it and try to run the included example, but no go.
  Am I supposed to download ffmpeg files prior to using this ? apt-get install ffmpeg ?

  Thanks !

• FFMPEG Update Command For Android 7

  4 juin 2019, par user2401847

  I have 300 images and i want to generate video from these images with Audio

  i am using below command to generate video

  ffmpeg -framerate 15 -i img_%d.jpg -i logo.png -i inputfile.mp3 -filter_complex \
  
  "[0:v][1:v] overlay=25:25:enable='between(t,0,20)'" \
  
  -vcodec libx264 -crf 25 -map 2:a -c:a copy -pix_fmt yuv420p -shortest test_video.mp4

  Which generates video with audio but video is not working for android 7 and above

  Log File (Android 6 - Working) https://drive.google.com/file/d/1uZEjcumY9qUACHvOSdW-3FxMQ66Gr7t4/view?usp=sharing

  Log file (Android 7 - not working ) https://drive.google.com/file/d/1QgFYjf-hr33LvIpDZBaV0KxyrO3Z9eUs/view?usp=sharing

• Android MediaExtractor crash when decoding some mp4 files. Libc fatal signal 11

  23 octobre 2015, par wonglik

  I am using Google Grafika examples to display video on TextureView. "Double decode" to be more specific . Code work most of the time but for some mp4 files it crash giving only :

  libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x0 in tid 7998

  Same code works for webM files and most mp4 files. Place where I expect it to fail is :

  extractor = new MediaExtractor();
  
  extractor.setDataSource(sourceFile);

  in MoviePlayer [L:113]

  Any hint how to walk around or what might be the problem ?