mpeg2 -> xvid bitrate problems

[smoki]

hi,
trying to convert some mpeg2 tv 16:9 captures to xvid, somehow Vidomi is acting up, xmpeg too so im trying tmpgenc express "output to .avi".

im selecting xvid, 1st pass, 2nd pass configure, then audio - lame @160, hit convert but it ends up with a file almost as big as the source?!?!

ran it thru gspot it reports it being an xvid .avi allright but the bitrate is like 10mbps?!

please help

[celtic_druid]

What did you set for the bitrate?
Also I wouldn't recommend TMPGEnc for avi output. Your MPEG2 is YV12 and XviD is YV12 but TMPGEnc means converting to RGB24.

[smoki]

im using tmpgenc xpress because nothing else works...vidomi breaks up, virtualdub i can't seem to find the audio compression options, dr.divx was a trial now expired and divx6 converter sucks. I might try flaskmpeg or xmpeg again tonight.

Somehow it worked out with tmpgenc but the resulting file was tiny this time and had a bad quality even at 1300kbps bitrate. Is there a way to make xvid automatically start the 2nd pass after the 1st one? dr.divx was really the best for me...

i have 3 files, 1 pregame and 1 for each game half, totalling around 7gb. total runtime around 2hrs. I want to maybe merge them into one before converting to divx/mpeg. What would be the best way? To create 2x700mb files the bitrate would be around 1500kbps for a 2hr material...

[guns1inger]

Virtualdub - set video to Full Stream Processing, then set the compression on the save dialogue.

[bugster]

Virtualdub - set video to Full Stream Processing, then set the compression on the save dialogue.

I am sure you mean VirtualdubMod, regular virtualdub will not open mpeg-2.

[smoki]

Virtualdub - set video to Full Stream Processing, then set the compression on the save dialogue.

I am sure you mean VirtualdubMod, regular virtualdub will not open mpeg-2.

i found that out myself too normal virtualdub complained about some frames missing from the mpeg2. The virtualdub mod opened it okay, but as i said i could only find the video compression function. I'll try tonight as suggested by gunslinger...although i think default is FSP, not directstreamcopy (i already did that). So basically do 2 jobs, one for 1st pass (resulting in the huge file), 2nd on 2nd pass, right? How can i join the 3 mpegs and cut out some commercials before i encode to xvid?

[Baldrick]

use virtualdub-mpeg2, it is same as virtualdub and you will find the audio->compression....

[Baldrick]

and you can also try AutoGK, DVX or avi.NET.

[Abond]

For VDubMod audio compresion:
Click streams-streamlist. Right click on audio track and select your compression. Don't forget to put it in Full processing mode

[celtic_druid]

Don't set it to full processing. Set it to fast recompress.

[smoki]

and you can also try AutoGK, DVX or avi.NET.

dvx crashes
avi.net doesnt want to load the mpeg, errors out with "error creating index file"

virtualdu(m)b doesn't work either with xvid, no matter what settings i choose for 1st or 2nd pass it always gives me a huge file almost as big as the source after 1st pass, after 2nd pass the bitrate is fscked, like 300kbps, i can count the macroblocks on one hand. what the hell is going on?

is there an utility that wipes ALL codecs from your HDD, like drivercleaner is for gfx drivers?

[junkmalle]

virtualdu(m)b doesn't work either with xvid, no matter what settings i choose for 1st or 2nd pass it always gives me a huge file almost as big as the source after 1st pass, after 2nd pass the bitrate is fscked, like 300kbps, i can count the macroblocks on one hand. what the hell is going on?

Forget about 2-pass encoding. Just use single pass, Quantization mode. Use a Quantization value around 3.

[smoki]

ok people, it works...
using xmpeg i was able to do a 3pass 1500kbps encode on a sample 1min mpeg2 capture...the result is awesome. I use a Leadtek winfast 2000 expert (10bit dac, comb filter, etc) with composite inputs (sat box doesnt do svideo over scart)...capturing using Leadtek's own application, WinPVR with the "DVD" preset 720x576@6mbps.

Sometimes i wonder if Winpvr outputs mpeg2 as 100% mpeg compliant material, cos Tmpgenc Dvd Author always complains the GOP is too high...

I'm encoding the 1st video overnight, 3pass overkill but im sleeping anyway Will let u know how it turned out. Cheers

[junkmalle]

If you don't need a file of a specific size there's no point in a multipass encode. Quantization mode is a constant quality method. Pick the quality you want, every frame will have that quality. The file will come out to whatever size is needed to maintain that quality with only a single pass.

[smoki]

If you don't need a file of a specific size there's no point in a multipass encode. Quantization mode is a constant quality method. Pick the quality you want, every frame will have that quality. The file will come out to whatever size is needed to maintain that quality with only a single pass.

i am still kind of aiming for 2x700mb for 2 hrs of material. 1st "CD" was done today morning, it looks really good @ 1500kbps. It finally works dammit...Xmpeg forever Glad it knows how to do multipass without those pesky job controls.

* just a quick question on resizing: the material is 16:9 but the card captures it in 4:3 (even if i force 16:9 in the player part). So xmpeg sees it also as 4:3...does resizing mess up the 1:1.25 ratio in the end? (im kinda confused on what valid resolutions i can resize into).

[smoki]

started a thread on hardware encoding here
https://www.videohelp.com/forum/viewtopic.php?p=1329852#1329852
maybe someone can help thanks