[FFmpeg-user] Question about splitting video with dvd_nav_packet data streams

[David Favor]

Carl Eugen Hoyos wrote:
> David Favor <david <at> davidfavor.com> writes:
> 
>>>> 1) adjust volume
>>>> 2) reduce bitrate
>>>> 3) retain all data streams (varies 1-3 data streams/VOB file)
> 
>> ffmpeg -y -i VTS_01_0.VOB -c:a pcm_s16le -ar 44100 -ac 2 
>> foo.wav -map 0:1 -c:v copy foo.vob -map 0:1 -c:d copy foo.data
> 
> (Complete, uncut console output missing.)
> 
> Why do want to output a file "foo.wav"?
> If your goal is to have an input vob file, adjust its volume, 
> reduce its video bitrate (and copy some other streams from 
> input to output), why should there be a wav file involved?
> 
> The same for foo.vob: Why don't you reencode with your 
> desired target bitrate?
> 
>>     [NULL  <at>  0x7fb0f2038600] Unable to find a suitable 
>> output format for 'foo.data'
> 
> If you want to keep the data streams from an input vob file, 
> your output file has be a vob file as well.
> 
> Carl Eugen

I need to break apart the file + edit audio + reassemble file.

To do this. I have to have each stream separated.