Avi render question

[juGGaKNot]

Witch is better for QUALITY ?

2 pass whatever bitrate

or

one pass target quantizer 5

default quantization ( 1-31, 1-31, 1-31 ) for 2 pass

[poisondeathray]

Witch is better for QUALITY ?

2 pass whatever bitrate

or

one pass target quantizer 5

default quantization ( 1-31, 1-31, 1-31 ) for 2 pass

Impossible to answer. It depends on the source characteristics and codec used.

[LoRd_MuldeR]

If we take x264 for example, then the differences between a 1-Pass CRF encode and a 2-Pass encode at the same average bitrate are negligible.
The only difference is: With CRF you can not predict the resulting bitrate/filesize in advance, with 2-Pass you can (but you pay with longer encode time).

[juGGaKNot]

I ask this question because i have moved on to xvid from x264 CRF for my 1024x768 ( + resize to 1024x576 for widescreen )

imput footage RGB at 300 FPS uncompressed

Render at 30/50/60/100 FPS via vegas ( smart resample on )

30 FPS final output = 10 frames make a final frame
50 FPS final output = 6 Frames make a final frame
60 FPS final output = 5 Frames make a final frame
100 FPS final output = 3 Frames make a final frame

i want to use xvid because ( what i know now, not to sure :) ) there is no conversion to yv12 like in x264

crf 18 x264 is k, at 50 FPS i get 90 MB/Min ( huge but i only stream my movie on ftp's in my country so k ) but laggs on people's pc's

so i want to use cfg 4-5 xvid or 2 pass 5500 xvid ( better quality at that resolution because of no resize )

for 720p and 1080p i use dxva x264.

[Comatose]

I might be wrong, but I don't think XviD does RGB >_>
And I don't know about you, but crf 5 with XviD is way too bad for me. XviD has a much smaller scale, it seems ><

[juGGaKNot]

Hmm ..

colors look better on xvid than x264 ( yv12 conversion right ? and yv24 is dead no ? )

they do look best on wmv ... don't know, other opinions ?

LE : btw is there a resize "plugin" for vegas 8.0 out there ?

now i render 4/3 1024x768 and reopen in vdub to resize it to 1024x576 ( 100:75 relative )

if my project is 1024x768 and i render 1024x576 will it crop the footage or resize it ?

[poisondeathray]

both are yv12 colorspace

They might look different because something on your system is different (e.g. renderer, filters) for either playback, or during encoding.

If you are streaming videos, you can use probably reduce the filesize substantially compared to XviD if you choose x264.

The lag experienced by users is probably bandwidth related (since you are streaming ~5000kbps); unless they have ancient PC's, or everyone has a fibre optic line (then you might be able to rule out bandwidth issues).

[juGGaKNot]

I dont "stream" the movies, only download, filesize does not matter to much.

so is there something out there that will encode directly RGB888 ?

and another question, the pictures are 32 bit, when i make them AVI they become 24 bit ( XRGB888 to RGB888 ) is there a quality loss here ?

this one + the conversion to yv12 loss is strong ?

i want to do xvid to because for most of the people here 1280x720 any codec = huge lag

xvid a bit better for there pc's

[LoRd_MuldeR]

And I don't know about you, but crf 5 with XviD is way too bad for me.
Xvid doesn't have a CRF mode, only x264 has. Xvid has a "dumb" constant quantizer (CQ) mode though...

so is there something out there that will encode directly RGB888 ?
All lossy video compression formats I'm aware of use the YUV color model, because it much better suits the human perception and thus helps compression.
Thins includes MPEG-2, MPEG-4 ASP (Xvid and DivX) as well as H.264/AVC (x264). They all use YUV.

I know that FFV1 supports the RGB32 mode. But that one is true lossess, so you can't expect a compression ratio like lossy formats can achieve...