# analyze file
`ffprobe file 2>&1 | grep Stream`

```
    Stream #0:0(eng): Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x802 [SAR 1:1 DAR 960:401], 23.98 fps, 23.98 tbr, 1k tbn, 2k tbc (default)
    Stream #0:1(ger): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default) (forced)
    Stream #0:2(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
    Stream #0:3(ger): Subtitle: subrip (default) (forced)
```

# remove german audio track
`ffmpeg -i file -c:v copy -c:a copy -c:s copy -map 0:0 -map 0:2 -map 0:3 out`

# convert audio track to aac 2.0 256kbit
`ffmpeg -i file -c:v copy -c:s copy -c:a aac -ab 256k -ac 2 out`

# generate new file starting at position "seconds"
`ffmpeg -i file -c:v copy -c:a copy -c:s copy -ss seconds out`

# switch tracks (german and english audio track)
`ffmpeg -i file -c:v copy -c:a copy -c:s copy -map 0:0 -map 0:2 -map 0:1 -map 0:3 out`