Re: 24-bit/96KHz LPCM audio

Thu Apr 10 2003, Dave Chapman wrote:
> 
> Another unusual feature of the DVD is that the video stream is simply a 
> still image containing the track name.  However, it seems to be very 
> cleverly mastered - demuxing the video from the VOBs gives me a very 
> small file and using "mpeg2dec -o pgm" only gives me 13 images - one for 
> each track.

The video stream can include still pictures in a couple different
formats. This sounds like it is just one picture in the video stream,
and then there is an audio track.
Nothing really special, most menus on dvds that don't have
moving video are the same.


> 48KHz->44.1KHz resampling is something I also need added to ogle so that 
> DVD playback will work on my Linux iBook - the sound hardware can only 
> do 44.1KHz.

I think that alsa has samplerate conversion built in. At least
it seemed that way when I tested (I have an old sb32 that only does 44.1)
Otherwise the video will play a bit slower to keep in sync with the audio.


/Björn