Huffyuv capture size

[zaki]

I was wondering how much space is needed to capture from a 352 x 288 with Huffyuv, let's say for half-hour and 1 hour length. Capturing for a few minutes has resulted in gigabytes of space. Since sometimes I am capturing half-hour and 1 hours movies, I usually used Dix 4.0 at 3000kbps since the filesize is smaller but whenever the captured video is viewed fullscreen, I can notice the blockiness.

Thus, what codec (other than Huffyuv and MJPEG) captures at reasonably good quality and takes up less space?

Thanks.

[Diablo_75]

I would say....nothing else. Personally, I've found that doing a post encode to Divx FROM a huffyuv file always looks better then trying to encode a divx in realtime live. If you have the HD space, I would capture to Huffyuv, have your compression setting within huffyuv set at best (Notibly the RGB compression method "Convert to YUV".....I think you get better performance speed wise out of doing it like that, but with a resolution that small, it probably wouldn't make a difference).

Then just convert the file over with a divx codec of your choice. Version 5 just came out, so you might check out how that one runs when it comes to your capture question.

[zaki]

I'll be doing that. But I'm curious about the size of the file when capturing using huffyuv. If I capture for half-hour or one hour, what is the average size of the file. Since my asus v7700 card cannot perform as well in win2k than on win98, then i'm stuck with fat32. i'll have multiple avi files of 2048/4096MB.

thanks.

[Triffid]

You're right, it's gonna be BIG. I guess about 10G an hour at that res (as I recall, I more than filled up my 20GB captire partition capturing Temple of Doom). What capture app are you using? If it's Virtualdub, you can do multisegment capture on FAT32 that behaves - to virtualdub - like one big capture file.

I also use V7700 under Win98SE, and that's how I do it. (V7700 -> UYVY -> Huffy (best compression setting) in virtualdub)

Note that I believe it is best to capture directly in UYVY (via huffyuv of course) and NOT RGB, as it is faster, with better compression, and you get the same quality.

(I hope those Ys Us and Vs are in the right order...I can never remember how it goes!!)

BTW which driver are you using, the ASUS vfw (asuscap) driver, or the Nvidia WDM driver? (I use the former and have big trouble when I try to use the latter)

Good luck

[zaki]

I'm using avi_io, the only app that could capture without any/minimal loss of frames. in virtualdub, even though the loss is minimal, but it's still more than avi_io. i dunno, some say it's because the buffer size is bigger.

i'm using the original asus video capture driver (v6.31c) on win98se, the one that came with the display card. i've tried the wdm, but its not stable. i've no issues with the v7700, except they should provide more support for win2k/xp.

i've tried capturing 10 min using huffyuv > uyvy > (best), the output file is 1.1GB. haven't tried capturing multisegment, but avi_io shouldn't have any problems with that.

thanks.

[Triffid]

zaki,

There are a lot newer drivers for your card that the ones you are using. You can run 21.83 drivers that include updates also for the vfw capture driver (compared to the 6.31s). If you want these drivers, you can get them at:

ftp://ftp.asus.com.tw/pub/ASUS/vga/Liveupdate/Win9x/

After 21.83, they seem to be dropping vfw. They have just released 27.42 (but it removes the vfw driver) so you have to use wdm 1.11. Not that you'd want it, but you can get it at

ftp://ftp.asuscom.de/pub/ASUSCOM/TREIBER/VGA/V7x00/

This is why I am struggling with wdm at the moment (also, if it were to work, it actually gives 720x576 capture....not 704)

[zaki]

i've found this forum which discusses on the problems and solutions for the asus v7100/7700 wdm installation. maybe you can try solve the problem.

http://www.tek-tips.com/gviewthread.cfm/lev2/66/lev3/68/pid/749/qid/155668

what is the advantage of installing the wdm driver in win98se since the vfw driver is already available? i can understand the reason for win2k/xp. also capturing at 720x576, wouldn't it cause the movie to be "a bit" wide-screen if the source is 352:288?

[Triffid]

Hi zaki,

the advantage is that the vfw driver ISN'T there anymore after the 21.83 drivers (so I guess there is no further support from ASUS).

(Besides one day we will probably all be forced to move on from Win98SE for one reason or another, so may as well start preparing now!...assuming it works well)

The 720 just gives you more resolution, it doesn't change the shape of the picture, as long as the next app along the line knows what it's doing.

BTW thanks for the link.