AIWRadeon-Video Capture, MPEG2, DiVX...

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eddie

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WAOUH!
Ok, two things here. A question, and a notice.

The question first:
* Why, when I capture through the ATI TVTuner, using say "Good quality" or "best quality" (thus MPEG2) or any custom MPEG2 -- the quality is.. ehm.. CRAPPY?! Detailed: it looks, feels.. 'pixelated' ... just.. not good.. maybe I can get a screenshot if necessary. It's just really.. not satisfactory!!!

So this led me to discover this:
* DiVX in REALTIME!!! (I thought DiVX encoding was a real long process) The AIW RADEON for me (system details below) does DiVX in REALTIME!!! Now the ATI TV Tuner doesn't let me choose much options, so the quality is so so. (Tip for others: use DiVX Fast motion, NOT low motion when capturing). In virtual dub or avi/io I can get a little better (changing the bitrate for example)... However, my system pretty much maxes out at 320*240 -- if I try 640*480, i drop frames.

Can anyone help why mpeg2 recording.. is NOT useable!? (not to me, at all! -- gees I upgraded from Matrox Marvel G200TV, MJPEG, I thought that was SO MUCH BETTER. for now I'm doing DiVX, it's nicer..but I know mpeg2 SHOULD do better!)

Thanks,

- Eddie
 
Woups, I forgot to put my system info:

AMD Athlon 800 (no o/c)
256MB Ram
ABIT KA7 (yehp, and it works fine :)

Oh yes, a tip for those who read this:
I got the AIW Radeon to work AGP 2x indeed with the AGP Driving Control of 68, CPU NORMAL decode (not FAST), AGP 4x disabled in Bios, VIA 4.25a drivers installed with TURBO (btw, in the registry you can edit a value so you don't really need to *reinstall* the drivers -- but you will need to reboot:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\VIAGART
TURBO is either 00 00 or 01 00

- Eddie
 
How'd you get it to capture in Divx? I only have options for AVI, mpeg1, and mpeg2.
 
You've installed the divx codec right? (www.divx.ch or something? go to google.com, just type divx ..) it includes the decoder and encoder. Then the ATI TV Tuner should let you choose it under the AVI custom settings (click custom, create new, avi... and when it comes to codec, go for DiVX..)

- Eddie
 
Ah, ok, I was looking for it to be under Mpeg not AVI. The quality was pretty good I think... however I was only able to capture at 320x240. Howd you get it to even try 640x480? The AVI screen only gives 4 res options, maxing out at 320x240. The 'Configure' button is greyed out for the Divx codec (and most others as well). Don't see any way to increase the size...
 
well tv is 320_200 ntcf or what ever the american tv system is called
and pal is 320_240 so if you want to capture tv or vcr then you dont really need more then 320_240, first when HDTV and recordable dvd stuff becomes normal will camputring at high res be a ness, and by then people are prob using radeon aiw 2003 or something :)

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hhhmm ok i may be a jerk but i'm a jedi jerk like my father was before me :)
 
<BLOCKQUOTE><font size="1" face="Arial, Verdana">quote:</font><HR>Originally posted by Rudegar:
well tv is 320_200 ntcf or what ever the american tv system is called
and pal is 320_240 so if you want to capture tv or vcr then you dont really need more then 320_240, first when HDTV and recordable dvd stuff becomes normal will camputring at high res be a ness, and by then people are prob using radeon aiw 2003 or something :)

<HR></BLOCKQUOTE>

Oh really? Hmmm... but see, if you record at that 'low' resolution, what happens is that when you are then viewing it on a 1024*768 resolution desktop, and you want full screen, it doesn't look the same as when the tv tuner is 'maximized' .. and here I'm calling upon, again the BLOCKINESS of certain mpeg-2 settings.

Now I spent all last night playing with tons of settings... but I still have't reached one CONCLUSIVE set of settings to get nice mpeg-2... Noone really has an explanation to why some people get those 'blocky' mpeg-2s?

- Eddie
 
There's a world of difference in quality between capturing the input at 320x240 and 640x480. Even with mpeg2, capturing at low res and upscaling it looks awful compared to capturing at the upscaled res directly. divx looks even worse than others due to the high compression.

I'd still like to try 640 using the divx codec... where did you select that res for capturing eddie?
 
Rudegar
I did some looking and the full NTSC standard is 525 with 484 active, by 242. PAL is slightly higher.
 
<BLOCKQUOTE><font size="1" face="Arial, Verdana">quote:</font><HR>Originally posted by Jeraden:
There's a world of difference in quality between capturing the input at 320x240 and 640x480. Even with mpeg2, capturing at low res and upscaling it looks awful compared to capturing at the upscaled res directly. divx looks even worse than others due to the high compression.<HR></BLOCKQUOTE>

Right -- but what's the solution then to getting normal, NOT BLOCK, mpeg-2 with the AIW Radeon? Regardless of the source? (Tv, video, ntsc, pal...)


<BLOCKQUOTE><font size="1" face="Arial, Verdana">quote:</font><HR>I'd still like to try 640 using the divx codec... where did you select that res for capturing eddie?<HR></BLOCKQUOTE>

Use AVI/IO or Virtualdub
 
I have a Radeon64ViVo OEM.
I can capture in MPEG without problems. However I am not able to capture in AVI format. Has anyone captured in AVI format with the Radeon64ViVo.
I do not remember if this ever worked. When I click to stop the recording the file isn't saved. I hear the program transfering data to the hard drive but when I stop the recording it isn't in capture.avi. The file doesn't exist. The remaining hard drive space hasn't changed. Concluding that the file wasn't saved.
Also is there any way to capture 480 lines using AVI capture. There is no option for it.
If ATI's video-in program won't do it, is there any other program that will. Virtual Dub and AVIEdit do not recognize any video-in device. I have unistalled and reinstalled WebTV and the MMC software numerous times to get it to work. Need help.
I have a PII-434 (P2-350 overclocked), Win98SE, DFI AGP2x motherboard.
Sincerely,
Aouie
 
<BLOCKQUOTE><font size="1" face="Arial, Verdana">quote:</font><HR>Originally posted by Boke:
Rudegar
I did some looking and the full NTSC standard is 525 with 484 active, by 242. PAL is slightly higher.<HR></BLOCKQUOTE>

D1 CCIR601 (studio quality NTSC) is 720x248 per field, 2 fields make a 720x496 frame, but the fields are temporally and spatially out of phase. DVD can deliver a 720x496 frame but there's MPEG compression artifacts in taking 21MBytes/sec down to less than 15Mbits/sec. VHS is about 320x180 usable resolution.


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'98 Eagle Talon TSI AWD - Summer/Autocross 13.7@98
'91 Eagle Talon TSI AWD - Winter/Drag 12.6@108
www.geocities.com/Racing_Talons
 
well but anyway
you can look at it like if you want to rip an old music tape to the computer and burn it on a cd

of cause diffrent filters can be applied but the source will still be lower qualy

the diff thing if the tv program goes full screen then the monitor lower the res and then it dont like as bad or run as slow as if you maximize the tv program

kinda like looking at a game run at 640:480 dont look as bad full screen as if you take a screenshot and zoom on it untill it is what ever res you run

but of cause it would be nice to rip at higher res if you want to rip a game from a console or a dvd kinda signal or something and for the day hdtv gets std

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hhhmm ok i may be a jerk but i'm a jedi jerk like my father was before me :)
 
Well, I'm not sure if this is going to help you since I'm not using a TV Tuner, but I'm getting (after a lot of experimenting) pretty good results with a codec I found on http://www.vcdhelper.com/. It's called Huffyuv v1.3.1 and is freeware. You can find more details http://www.math.berkeley.edu/~benrg/huffyuv.html or vcdhelper. I can choose this codec for capturing. It captures in mp2 but strangely enough you have to choose avi and then you find it in the list. Hope this helps, let me know,

Rikki
 
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