I want to execute ffmpeg from an Android app, very much as described here: Using FFmpeg with Android-NDK.
Executing the following commands work fine:
Pro
I finally got it. I forgot one possibility, and exactly this one is working:
Process p = Runtime.getRuntime().exec(new String[]{"/data/data/yourpackagename/ffmpeg", "-i", "in space file.mp4", "outfile.mp4"); //OK