can PowerVCR II MPEG-2 files be converted ?

[toraneko]

I have a Hercules Smart TV Stereo card, which was bundled with the "PowerVCR II" software, which enables to record TV shows into MPEG-2 files (MPEG-2 video stream and MPEG-1 layer 2 audio stream, up to 720x576 29.97 fps 10000 kbps clips), which are divided into a collection of (up to) 600 MB files (if more).

those files are then perfectly played by Media Player Classic (using Intervideo filter) but I lose A/V synch whenever I try to demux/decode/record individually the video and the audio tracks with DVD2AVI, TMPEGEnc, VirtualDubMod or Total Recorder...

does someone sees a way to recompress those kind of clips into XviD ?

thanks in advance

[BaronVlad]

Hi,

your sync problems may occure because of frame drops. Or:

Where do you live ? PAL or NTSC ? you are recording with 29...that is NTSC, if you live in a PAL Country please set the fps to 25, do your recording and follow the GKnot guides by doom9 to compress the files to XVid.

If you want to keep your existing files you could open your compressed XVid and audio and compare the length of both. Then change your framerate to 25, should be in sync now.

If not, please come back.

BTW: IMO you should try huffyuv caps as mentioned in the guide on this page ;)

[toraneko]

thanks for the advices

I'll look at it (again) this evening

[kastro68]

try encoding the audio to both 48Khz and 44Khz.

Some soundcards provide better sync for certain frequencies.

[Eagle117]

I used to use that software, and I had the exact same problem with the audio going out.

First off, you can get into your registry and look for a key called "Maxrecsize" I believe and change it from 600MB chuncks to 2 or 4 GB max I believe. Made it much easier on me.

I found two work arounds for the audio problem. First one was to open the video file in Flask and do a basic video encoding and have it write the audio to an MP2 or MPA file. Then I used Winamp 2.81 with the diskwriter output to make an MP3. Then I could load the video file with VirtualDub 1.5.1 and set the audio source to by my Wav file that Winamp converted and it would stay perfectly in sync.

The second, and much shorter way I found was to use this version of VDub. http://fcchandler.home.comcast.net/
It can open MPEG-2 files and I never had any trouble with the audio going out of sync, even from PowerVCR.

So that is my two cents.

[toraneko]

ok, thanks
I'll try with out too.

by now, it seems that my computer (Athlon 1700+, 256MB of RAM) is too weak to capture at fullres with huffyuv without drops, so I'm only doing 384x288 captures

[Eagle117]

I normally only capture at 320x240 since that is my destination output anyway, and resizing slows everything down considerably.

[toraneko]

oops... typo : I wanted to write I'll try this out too.

I capture in 384x288 'cos I'm dealing with PAL source.

[Eagle117]

Ah, gotcha. Never dealt with PAL, but my capture card supports it if I ever hop over somewhere that has it.

Any luck with the audio sync?