[MPlayer-users] AVI: Missing video stream!? Contact the author, it may be a bug :(

[Kyrre Ness Sjobak]

tor, 10.11.2005 kl. 16.18 skrev Rich Felker:
> On Thu, Nov 10, 2005 at 09:14:20AM +0100, Kyrre Ness Sjobak wrote:
> > > > > Or can i somehow get *lossless/lowloss* mpeg2 movie directly (*if* my
> > > > > pc can encode it quicly enough)?
> > > > 
> > > > mpeg2video with vqscale=2 and keyint=1 will be practically perfect (no,
> > > > not lossless), and very fast.
> > > > 
> > > > If you want lossless, try huffyuv.
> > > 
> > > huffyuv is lossy because it requires rescaling to 4:2:2 sampling.
> > > You want to use ffhuff for lossless, or ffv1 (slow but better
> > > compression).
> > > 
> > I think i got an error message saying something about YUV12 format not
> > supported when i tried to use huffyuv. But i'll try MPEG2-video then.
> 
> right. like i said huffyuv is bad.
> 
> > > > > What audio format does a normal HW DVD-player use?
> > > > 
> > > > AC3 is standard.  Most all seem to support MP2 audio as well.
> > > 
> > > MP2 is only supported for PAL DVD. For NTSC either AC3 or PCM is
> > > required. :( For this reason independent DVD producers who don't want
> > > to pay AC3 license fees feel compelled to use PCM which wastes a good
> > > 1/5 of the bitrate on audio.. :(
> > > 
> > 
> > MP2 isn't a problem, as i am using PAL then.
> > 
> > OK. So then:
> > -mpeg container format
> > -mpeg2video videocodec, options vqscale=2 and keyint=1
> > -mp2 sound
> > should work fine on all PAL DVD players, be future-proof, and editable
> 
> no. editability and working on dvd players may even be mutually
> exclusive. dvd requires a strict maximum bitrate which may be exceeded
> if you use vqscale, and it's supposed to have a gop structure with B
> frames and keyframe interval 15 (for pal/film) or 18 (for ntsc).
> whether these are strict requirements, i don't know.
> 
> rich
> 

Ahh. I didn't really mean editing, just making chapters or chopping up
the video. But it doesnt really matter.

Can't the keyframes be regenerated if they are destroyed? Or do i lack
some critical background knowledge here...


Kyrre