How to increase video sample size with AutoGK/VirtualDubMod/Xvid?

[luigi]

trying to convert mov to avi and into xvid

but after converting , movie clip becomes pixelated..

comparing with other files that i downloaded , i found that the video sample size is 24bit while my converted is 12bit

is that any step i gone wrong??? pls help me O'mighty wizards

Hereby are my log:

[6/17/2006 2:05:53 AM] AutoGK 2.27
[6/17/2006 2:05:53 AM] OS: WinXP (5.1.2600).2
[6/17/2006 2:05:53 AM] Job started.
[6/17/2006 2:05:53 AM] Input file: J:\Trial\the_pink_panther-tlr2_h720p.avi
[6/17/2006 2:05:53 AM] Input codec: cvid
[6/17/2006 2:05:53 AM] Source duration: 2mn 4s 164ms
[6/17/2006 2:05:53 AM] Output file: J:\Trial\the_pink_panther-tlr2_h720p_agk.avi
[6/17/2006 2:05:53 AM] Output codec: XviD
[6/17/2006 2:05:53 AM] Audio 1: 1536 Kbps PCM 2ch
[6/17/2006 2:05:53 AM] Subtitles: none
[6/17/2006 2:05:53 AM] Format: .AVI
[6/17/2006 2:05:53 AM] Target quality: 100%
[6/17/2006 2:05:53 AM] Started encoding.
[6/17/2006 2:05:53 AM] Source resolution: 1280x688
[6/17/2006 2:05:53 AM] Source fps: 23.976
[6/17/2006 2:05:53 AM] Output will contain 2977 frames
[6/17/2006 2:05:53 AM] Demuxing audio.
[6/17/2006 2:06:00 AM] Normalizing audio.
[6/17/2006 2:06:02 AM] Encoding audio.
[6/17/2006 2:06:18 AM] Running single pass encoding.
[6/17/2006 2:06:18 AM] Writing the following script to J:\Trial\agk_tmp\the_pink_panther-tlr2_h720p_agk_movie.avs
================================================== =========
LoadPlugin("C:\PROGRA~1\AutoGK\DGMPGDec\DGDecode.d ll")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\autocrop.dl l")
LoadPlugin("C:\PROGRA~1\AutoGK\filters\RemoveGrain SSE2.dll")

movie = DirectShowSource("J:\Trial\the_pink_panther-tlr2_h720p.avi",23.976).KillAudio()
movie = isRGB(movie) ? ConvertToYV12(movie) : movie
movie = isYUY2(movie) ? ConvertToYV12(movie) : movie
cropclip = autocrop(movie,mode=0,wmultof=4,hmultof=4,samples= 10,aspect=0,threshold=0,samplestartframe=0,leftadd =0,rightadd=0,topadd=0,bottomadd=0)
fixed_aspect = 1
c_width = width(cropclip)
c_height = round(height(cropclip) / fixed_aspect)
input_par = float(c_width)/float(c_height)
input_par = (input_par > 1.4) || (input_par < 1.25) ? input_par : (4.0/3.0)
out_width = 1280
out_height = round(float(out_width) / input_par)
hmod = out_height - (floor(out_height / 16 ) * 16)
out_height = (hmod > 4) ? (out_height + (16 - hmod)) : (out_height - hmod)
new_aspect = (float(out_width) / float(out_height)) / fixed_aspect
autocrop(movie,mode=0,wmultof=4,hmultof=4,samples= 10,aspect=new_aspect,threshold=0,samplestartframe= 0,leftadd=0,rightadd=0,topadd=0,bottomadd=0)
LanczosResize(out_width,out_height)
================================================== =========
[6/17/2006 2:13:50 AM] Duration was: 7 minutes 31 seconds
[6/17/2006 2:13:50 AM] Speed was: 6.59 fps.
[6/17/2006 2:13:50 AM] Job finished. Total time: 7 minutes 56 seconds

[anonymez]

i found that the video sample size is 24bit while my converted is 12bit

that means nothing other than no colourspace conversions were done during the encoding process. no difference in quality.

i don't use AutoGK so i'm not completely sure about the cause of the pixellation but i'm guessing it's been resized to a lower res and insufficient bitrate. you might like to give 2 pass encoding a shot, avoid cropping & resizing

[luigi]

that means nothing other than no colourspace conversions were done during the encoding process. no difference in quality.

i don't use AutoGK so i'm not completely sure about the cause of the pixellation but i'm guessing it's been resized to a lower res and insufficient bitrate. you might like to give 2 pass encoding a shot, avoid cropping & resizing

Nope, res remain the same except the video sample size is 12bit.. changing my xvid encoder to 2pass now and there's tons of confirgurations ahhhh... headache

[anonymez]

changing my xvid encoder to 2pass now and there's tons of confirgurations

don't ever expect high quality encodes with CBR at reasonable bitrates. go two pass, this should get you started http://forum.digital-digest.com/showthread.php?t=60613

[celtic_druid]

24bit is worse than 12bit. XviD always uses YV12 which is 12bit. 24bit means that it was converted to RGB24 during the encode. Unless the source was RGB, this is a bad thing since converting from YUV to RGB and back is not a lossless process.

Looks like a qt movie trailer which means AVC which is also (in this case) YV12.

XviD at 1 pass Q2 which I guess is what AutoGK does at 100% quality should be fine, better than 2 pass.