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• Android ffmpeg - 3gp to mp4(or avi) videos - not playing

  18 juillet 2013, par santhosh

  I am doing an android application which is used to merge two videos and after merge completed play the result video. For this I am using ffmpeg.

  When I record two mpeg or mp4 videos, the result merged video playing fine. Now I record the videos as 3gp and convert it into mp4(or avi) and merged it. Then the result video is not playing.

  Can anybody help me What may be the problem ?

  I am using the following code :

  String args[] = {"ffmpeg","-i",""+filename[i]+"",
  
                              "-qscale","1",
  
                              ""+Environment.getExternalStorageDirectory().getPath()+"/Movies/i"+(i + 1)+".mp4(or avi)"};

  To merge the videos :

  String args[] = {"ffmpeg","-i","concat:"+concatPath.toString()+"",
  
                                "-vcodec", "copy" ,
  
                                "-acodec" ,"copy",
  
                                "-vbsf", "aac_adtstoasc",
  
                                ""+Environment.getExternalStorageDirectory().getPath()+"/Movies/3.mp4"};

• Playing videos one after another

  29 septembre 2023, par AAB

  I can play the videos in grid one by one, but I want to get the playing video become bigger in size in the grid when playing, is it achievable via ffmpeg ?

  


• Overlaying multiple videos with ffmpeg [closed]

  21 juin 2015, par xZise

  I’m trying to overlay multiple videos into one video with ffmpeg. There is already a question with only one overlay, but I want to add multiple videos at the same time (to avoid multiple encodings).

  I try to use following line :

  ffmpeg -i background.m2v -vf "movie=a.m2v [a]; movie=b.m2v [b]; [in][a] overlay=0:366, [b] overlay=592:41" combined.m2v

  The error is now, that the overlay area (0,366) – (720,942) is not within the main area (0,0) – (720, 210). But if I use only one overlay file alone it works.

  The sizes of the videos :

  • background : 720x576
  • a.m2v : 72x48
  • b.m2v : 720x210

  In the result I want the a.m2v video in the top left corner (the logo) and the b.m2v as a lower third.