[vorbis] Video codec

[Jernej Simonèi]

----- Izvorno sporoèilo -----
Od: Chrissy and Raul <chrissyandraul at hotmail.com>
Za: <vorbis at xiph.org>
Poslano: 12. september 2000 1:47
Zadeva: Re: [vorbis] Video codec

|
| I propose for Ogg internet media:
|
| Frame Rates:
|
| - 15 fps (half 30 fps)
| - 24 fps (Film native rate.  I heard that in Europe 24 fps movie DVDs are
| presented at 25fps which make them end sooner, good, more time for the
| family, is this true?)

Yes it is true, PAL video standard has 25 FPS, and FILM 2 PAL conversion
works by simply
speeding up the movie for 4%.

| - 30 fps

I'd add 25 (PAL) and 12.5 (half PAL) here. Also AFAIK NTSC video is 29.97
FPS, and not 30 FPS.

|
| Bitrates (based on actual experiments with video compression):
|
| SIF (320x240 resolution)
| - 512 Kbps including 96 Kbps audio
| - 384 Kbps including 64 Kbps audio
| - 256 Kbps including 56 Kbps audio
|
| QSIF (160x120 resolution)
| TBA Some numbers available next week.
|
| I am using three scenes for the video compression experiments: hockey,
| mongolian rock concert, mongolian flag and plaza.
|
| >
| > > For now, I have not seen evidence of 128 Kbps media delivery at SIF
| > > resolution and I think QSIF (160x120) resolution is only good for
video
| > > phones or media including one single talking head.
| >
| >Just a stir in the pot: How about moving parts of web sites competition
| >to macromedia flash?
|
| Uh?
|
| RAUL LOPEZ
|
| >
| >Jelle.
| >

Jernej Simoncic, jernej.simoncic at guest.arnes.si
http://www2.arnes.si/~sopjsimo/
ICQ: 26266467

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