[MPlayer-users] Digitizing VHS tapes with mencoder

[Josef Wolf]

On Thu, Apr 22, 2010 at 05:57:10PM +0200, Krzysztof Duchnowski wrote:
> On 21.04.2010 23:32, Josef Wolf wrote:
> 
> > So to avoid scaling (I assume scaling reduces quality) and keep multiples
> > of 16, I crop to 752x560. But this results in bad aspect ratio.
> > 
> > The next resolution with proper aspect and both axes multiples of 16 would
> > be 704x528. But that would mean to throw away about 16% of the pixels. I'd
> > rather not throw away _that_ much.
> > 
> > Any suggestions?
> 
> You have 2 options:
> 1) stay with AVI and add black border

Umm...

> 2) remux from AVI to MKV or MP4 and add aspect info to the file (can be
> done easily during muxing)

Seems to be the better option. But I have more questions:

- So avi can't store arbitrary aspect?

- Didn't I already created mpeg4? Or is MP4 something different?

- Do I really need an additional pass for this? Can't I do this in the
  encoding pass?