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• Cutting video with FFMPEG produces corrupted video file [closed]

  5 juillet 2024, par m0ntr3

  Im using FFmpeg library for trimming videos. The problem comes when I try to get a thumbnail from that video using MediaMetadataRetriever - getFrameAtTime() ; and on my logcat I can see this error - getFrameAtTime : videoFrame is a NULL pointer. This is the command I use to cut/trim the video files - "-ss", TrimmerUtils.formatCSeconds(lastMinValue),
"-i", String.valueOf(filePath),
"-t",
TrimmerUtils.formatCSeconds(lastMaxValue - lastMinValue),
"-async", "1", "-strict", "-2", "-c", "copy", outputPath
Im using Android Studio with Java if that does matter. Im only assuming its producing a corrupt file.

  


  If someone can help me that would be very appreciated !

  


• Compress a video using libavcodec / libavformat

  6 juillet 2016, par Manicat

  I have written a MS Windows c++ application in Visual Studio that shows a certain animation in OpenGL. I have managed to grab this animation as frames and save these to a mpg file by using libavcodec.

  Now I want to compress this video and save it as a mp4 file. I can do this with ffmpeg -i input.mpg -c:v libx264 -qmin 15 -qmax 35 -crf 28 output.mp4 which typically reduces the file size by a factor 10.

  However, I would like to achieve the same result by using libavcodec / libavformat directly. Can somebody please show me c++ code that managesthis conversion.

  PS
  I have very limited experience with libavcodec / libavformat so far. I am learning by the day ...

• Revision 534ac8a617 : Remove common_data.c file from vp10 folder This file is empty in vp10. Remove i

  13 août 2015, par Jingning Han

  Changed Paths :
   Delete /vp10/common/common_data.c

  
   Modify /vp10/vp10_common.mk

  
  
  Remove common_data.c file from vp10 folder

  This file is empty in vp10. Remove it to clear out visual studio
  warning.

  Change-Id : I741e88adcf3c9fc6b73b13ea08a2094e2f3a7eba