Half speed playback of captured video file

[theknife]

Hello all

Here is a weird problem.

I have just put an old ATI all in wonder card into my pc (P4 1.4ghz, 365 ram). The most recent drivers for this card downloaded and installed.Through the composite port I can capture full res video and can encode the audio to pcm 48KHZ 16 bit at the same time


I have now started compression at the time of capture using Xvid (1 pass quantiser ) The capture is stored on an empty 30gb maxtor hard disk. I have to reduce the capture size to 360 x 480 to get no dropped frames, but the results are quite acceptable for display on a tv. The capture programme that comes with the drivers won't let me change to that resolution but using a utility called flycap (http://asvzzz.narod.ru/) i can set a specific resolution

Here is the problem:- If I use the flycap's play back , it opens zoom player and plays the video fine. If, however, I close flycap, and open zoomplayer, the video plays back at half speed. Even after I have rebooted the machine, all video playback is at half speed, even some dvd rips that were playing fine before. If I restart flycap, and open zoom player independently, playback is fine.

I just noticed the cpu usage is at 100% if zoomplayer (or media player or mpc classic ) is used and drops if I load the capture program) Now I am totally confused.

Does anyone know why this is happening?

[chemmajik]

Open up the Zoom player OSD & find out at what frames per sec your video is playing at, you maybe force capturing at a defaulted say 15 fps. I dont have a AIW, but look in the config settings, you migth have to create a new profile if it uses one. If you have some old material that you want to keep, use virtualdub that has a filter to increase the fps, or use the built in frame rate converter. But if the material is sow low like 15 I dont know if it would safe to go any higher then say 20 or 23 by luck(I maybe wrong on this last point, but sounds logical).

[theknife]

thanks
Listed fps is 25 (it's a PAL capture). I don't think it is an inherent problem with the AVI file as all xvid avi's I produced prior to using this capture program now run slowly, and will run at normal speed if the capture program is loaded in the background.

If I render the avi with graphedit, the filters it uses are the same with or without the capture program loaded (ffdshow). Disabling ffdshow produces same result.

Flycap runs as a single exec and has no install/deinstall routine so I cannot work out why it has affected my system such that the adverse changes are present when the program is not running, but resolved when it is:confused:

I have tried running some mpeg(1) files and they work fine so it does seem to be specific for xvid/divx.

[chemmajik]

When in doubt uninstall ATI capture drivers mmc center & reinstall them both. That will definently get you back to default. If you have made any hardware change recently since this started happening, sometimes having IRQ sharing can effect the capture & playback. I'd try the first then if all else look in device manager to see if you are sharing. But I've had instances of direct show filters getting all messed up like you said with other software installs.

[theknife]

@chemmajik

thanx

Yes, I tried this and I think this does look like a basic driver problem with the ATI drivers!

I uninstalled MMC and Capture modules - no change- but when I uninstalled the ATI video driver( updated from their website) and installed the driver that came with win2k, all vids, including the captured ones , play fine.

So.. vid playing is back to normal but I have no capture facility as the capture component of the video card is not recognised by the "generic" ati driver. Still can't explain why video playing is normal with a capture device in the back ground and slow when no capture device is active.:confused:

I've reinstalled the ATI drivers because I need a capture system at least pro tem. I'll try to find a way to circumvent the behavior of the ATI driver though.

[chemmajik]

We are told that MMC7.9 or MMC 8 will finally help all ATI card users when dealing with capture issues, that is read. But that may not reach us till spring.