Hello ffmpeg heroes - please help me with ffmpeg/ffprobe commands to decode a video for me?
It is all about the proprietary codec, i.e. IMM5. The VLC and FFMPEG can't deal with it except patching the avcodec manually using https://patchwork.ffmpeg.org/project/ffmpeg/patch/20190716170703.10960-1-onemda@gmail.com/. Of course, you need to re-compile the ffmpeg using the IMM5 supported avcodec lib.
Good luck.