PocketTV Team

Originally Posted by Arthur Pendrag

Can someone tell me the best way to fit an entire DVD (about a 1.5 hour average I suppose) onto a 256 sd card? Should I go for VGA res or a lower res so it will be better video quality? I recently compressed Black Hawk Down to 256 mb with Fairuse and it had ok quality. I think it was a lower resolution but then again I am not sure if Beta-player was running at VGA. Is there a tweak you have to get or anything? Well lots of qustions but most importantly I just want to know what the best settings/code/resolution to use to compress a DVD to 256megs.

This is off-topic in this thread. You should start another thread to discuss this, thanks.

Basically you need to compress it at 300 Kbps or less if you want 2h of movie in less than 256MB. Quality will be low (compared to the original DVD), and resolution will be QVGA at most, not VGA. Try using a good Xvid or Divx encoder.

victorypoint

Originally Posted by PocketTV Team

The question is: does DVDDecrypter do inverse-telecine ?

I don't think it does. In that case, DGIndex is the better tool for interlaced DVDs.

Originally Posted by PocketTV Team

For best performances, it is very important to code the movie frames (progressive).

Unless of course the DVD source is progressive scan to start with. My understanding is that most (if not all) anamorphic widescreen DVDs are progressive scan. Can anyone confirm this?

-AJ

PocketTV Team

> My understanding is that most (if not all) anamorphic widescreen DVDs are progressive scan. Can anyone confirm this?

No.

The video format does not matters (i.e. wide screen or TV). What matters is whether the DVD is NTSC or PAL.

If the DVD is NTSC, it is encoded at 30 fps interlaced, so movie content uses 3:2 pulldown and you *MUST* use inverse-telecine to recover the original progressive movie frames (i.e. 24 fps progressive source).


If the DVD is PAL, it is encoded at 25 fps interlaced, and in general the movie is just converted from 24 fps to 25 fps by playing it 4% faster. In this case it is possible that the source interlaced frames are in fact the same as the progressive movie frames. But it is not guaranteed, because some editing could have taken place, causing a one-field shift. So it is still sdvised to do inverse-telecine, to be on the safe side!

victorypoint

Originally Posted by PocketTV Team

> My understanding is that most (if not all) anamorphic widescreen DVDs are progressive scan. Can anyone confirm this? No. The video format does not matters (i.e. wide screen or TV). What matters is whether the DVD is NTSC or PAL. If the DVD is NTSC, it is encoded at 30 fps interlaced, so movie content uses 3:2 pulldown and you *MUST* use inverse-telecine to recover the original progressive movie frames (i.e. 24 fps progressive source).

Okay, thanks for clearing that up. I'm going through your guide now. It looks like DGIndex does a good job of displaying the video format (Film or Video, frame rate, etc) when playing the VOBs. But how do you know if a DVD contains interlaced vs progressive content? Related to the inverse-telecine issue, what are progressive-scan DVD players?

-AJ

PocketTV Team

Originally Posted by victorypoint

Okay, thanks for clearing that up. I'm going through your guide now. It looks like DGIndex does a good job of displaying the video format (Film or Video, frame rate, etc) when playing the VOBs. But how do you know if a DVD contains interlaced vs progressive content? Related to the inverse-telecine issue, what are progressive-scan DVD players?

DGIndex will tell you if the content is interlaced or prograssive, when you do the processing (it says 99% FILM for example).

Or you can just step in the original frames using tMPGEnc, and you will see if they are progressive or interlaced. But if they are interlaced, it does not mean that the content is really interlaced. In general the content is progressive (FILM) converted to interlaced NTSC with 3:2 pulldown telecine.

I don't know exactly, but when you call "progressive-scan DVD players" might be players that can do the de-telecine and feed the HDTV with decoded progressive frames, istead of with the interlaced NTSC frames. I'm not a DVD player expert.