No Video/Audio syncronysation by recording

[Arno]

After recording a movie, my recording time is ALWAYS half the time I realy recorded.
I'm using the Marvel G200 (16Mb).
When is select NO AUDIO in the cature options I have no problem.

Who can tell me what mistake I make?

[KRSESQ]

What capture utility are you using? Also what recording settings (image size, format)?
What is the length of the movie and what length is reported?

Kevin

[Arno]

The program I use for capturing is the program I got with my Marvel card: PC-VCR Remote program.

I already tried all kinds of compression and disk use intensity.

The only sollution is to record without audio, then I have no problem at all.

The reported time after recording is always half the time I realy recorded.

I also tried RGB (in stead off MJPEG).

[KRSESQ]

Arno:
The Matrox software is limited to two gigabyte captures. This averages to about 15 or twenty minutes of video and audio, depending capture image size and compression. PC-VCR gets around this by splitting lengthier captures into smaller files with progressive filenames. So if you try to capture a thirty minute video, you may end up with two files of fifteen minutes each.

Check your capture directory (default is the root directory of drive C). You may find a number of files, each bearing progressive filenames corresponding to the video you captured.

Kevin

[This message has been edited by KRSESQ (edited 12 February 2001).]

[Arno]

Kevin,

Thank you for your reactions.

The movies I am talking about are only a few seconds.
When I play back the movies they run much too fast but the sound is okay.

Arno

[KRSESQ]

Arno:

Which transmission format do you use in the Netherlands, NTSC, PAL, or SECAM?

I was under the understanding that GB uses PAL, France uses SECAM, and most of the rest of Europe uses NTSC. Am I mistaken?

Perhaps the wrong input option is selected for PC VCR.

Worth checking.

Kevin

[Arno]

Kevin,

Our standard in The Netherlands is PAL. Altough I am sure about it I tried NTSC, but than I got a warning that I had wrong settings.

Arno

[Greebe]

.

[KRSESQ]

What type of hard drive are you using? manufacturer, size, speed, etc.

Have you run the Matrox hard drive benchmark utility? What were the results?

Kevin

[Biker]

The 'key' here, has to be - what feature can allow the movie to play back at 'double ' speed and yet leave the audio running normal speed?

Surely this can not be a capture problem?
(but what do I know? - very little!)

------------------

[KRSESQ]

I'm wondering if dropped frames are giving the illusion that the picture is running at double speed. Arno seems to be dealing with a throughput problem, since he can capture video without audio but not both.

We should start compiling a list of contributing factors i.e. cpu and bus speed, chipset, memory, hdd DMA settings, etc.

Arno: go to Control Panel, double-click System, select Device Manager and View Devices By Type. Double-click Disk Drives and then double-click the drive you're capturing to. Click on the Settings tab and make sure the DMA box is checked.

If you are using a VIA chipset motherboard in your system, You might have better luck using the Windows 98 installed drivers for the bus master controller (Device Manager, Hard disk controllers) rather than VIA drivers. My experience was that hard drive performance went right down the loo using the VIA drivers (This was with an FIC VA503+ socket 7 mobo...'nuff said).

Kevin

[Arno]

Kevin,

I checked my AGP Aperture size; this was already correct 128MB.
I changed the IDE settings to AUTO.

I tried to record again but it was not better.

For my Video File Information report you can look at my web site:
http://home-1.worldonline.nl/~aborger/ahobby/VFI.htm

Best regards,
Arno

[Arno]

Kevin,

I also tied to record a longer time (30 sec) the report I got afterwards, showed me 1.5 sec and no frames lost.
The result of the Matrox benchmark gives me 4.09 Mb/sec.
I'm using win 98 SE on my Pentium II 350 PC with 256 Mb memory. The bus speed is 100Mhz (multiplier 3.5x). My chipset is 440BX.
The DMA for my 1st disk (Seagate) was accepted. Than I had exact the same problem. This disk crached and now I'm using one of the latest IBM disk (46.1Gb). Here DMA is automaticly turned off after restarting my PC. This maybe has something to do with my BIOS. My BIOS does not accept disks over 30 Gb (AWARD V4.5).

Arno

[KRSESQ]

This is most peculiar.

1. What operating system are you using?

2. What version of the Matrox display drivers are you using? Right-click on your Desktop, select "Properties" from the pop-up menu, choose "Settings" tab, click "Advanced" and then choose the "Information" tab. Look for "Matrox Power Desk"

3. What version of Video Tools are you using? Look for the "Read Me" file in the Video Tools Start-Programs menu.

4. What version of DirectX are you using? Click "start", "Run", browse to "Program Files\DirectX\Setup\DXDiag.exe". This will enable you to do a complete diagnostic on your DirectX setup and it will report the version number. Look at the bottom of the "System" page.

Have you installed any other MJPEG codecs like Morgan or PicVideo? How about the YUV hack or Huff? These "Shouldn't" cause problems, but you never know.

If there are any incompatibilities between these different items, this should point it out.

Kevin

[Biker]

I would not have thought the basic system was a problem as -
For what its worth, I use a G200, on a very poorly specified system, with no DMA at all.
After a defrag and scandisk, my Win95 system JUST reaches over 3 Mb/sec. yet I get no dropped frames at full res high quality capture. And its an old VIA chipset socket 7 Motherboard.

ARNO what happens if you capture at 352 x 288, at 25 frames/sec, does the same problem occur?

------------------