Dropped Frames with VirtualDubSync (has read Capture FAQ Stick)

[WEFANs]

Hi,I am new here,I am quite new to video capture.
Has search "frames dropped" in forum and read the Capture FAQ Stick(20 and 21),
and follows the guide step by step,

when capturing,I will get 20-25 frames dorpped an hour,has anyone got any tips?
Thanks in advance.

1. I have updated all of the hardware driver
2. UDMA mode confirmed enabled,formatted NTFS (capturing without the Promise controller)
4. restart before capture
3. Turn any active background proces off
5. Change the screen resolution to 800*600, 256 colors and 60Hz refresh rate
6. make a test capture (F7) before the real capture
7. without preview capturing

Video Soure: Composite,Capture Resolution 720*576,PAL TV 25 frames

VirtualDubVCR & Sync capture setting:
- Audio Compression - PCM 44.100 kHz,16bit stereo
- Video Compression - Huffyuv v2.1.1 - CCESP Patch v0.2.5
- Capture Setting
- Capture audio (enabled) - Frames rate 25.0000 - Drop% limit: 10 - Maximun index entries: 324000
- Video buffer limit: 150 - Audio buffer limit: 10 - Audioo buffer size: 18000 - Lock video stream to audio (enabled)
- Capture timing - resample audio data dynamically to match video clock (enabled)
- Disk I/O - Chunk size: 1MB - Chunk in buffer 15 - Disable Windows write buffering (enabled)


Hardware:
Motherboard - Asus P4B533-E
CPU - Inter P4 1.8 GHz
Hard drives - IBM 80GB 7200rpm (IC35L080AVVA07-7)
Capture card - Matrox RT.X10
Graphics card - Radeon 9550 INFINITE
Sound card - Sound Blaster Live Value
Ram - 512 MB DDR

System:
- Windows XP SP2 (Build 5.1.2600)

Sofware:
- VirtualDubVCR
- VirtualDub-1_5_04__sync1_04

Capture Codec:
- huffyuv_ccesp-patch_0.2.5

[jggimi]

Hello, and welcome to the forum.

If you're capturing in RGB, try switching to capturing in YUY2. RGB takes 24 bits per pixel, while YUY2 only consumes 16 bits per pixel.

I understand that most, if not all, capture chipsets actually capture in YUY2 anyway.

[WEFANs]

Hi jggimi,thanks for your reply.
when I try switching to capture format in VirtualDub sync,Only these
Options (RGB - YUV - DV/DVCAM),I can't find YUY2 mode.

http://xs10.xs.to/pics/05016/matrox.capture.format.setting.jpg

- capture format: YUV
- capture resolution: 720*576 (The only Capture Resolution available for the YUV and DV/DVCAM capture format is full-screen)
- Data format: YUY2 YUV 4:2:2 interleaved

http://xs10.xs.to/pics/05016/video.format.setting.jpg

I follows this setting to capture,but still get 20-25 frames dorpped an hour.

[WEFANs]

First test with VirtualDub 1.6.2
test capture mode without frames dorpped (runing time 43:58)
http://xs10.xs.to/pics/05010/VDub.setting.01.jpg
1 .Optimizing system http://www.winguides.com/
2. updated all of the hardware driver
3. UDMA mode confirmed enabled,formatted NTFS (capturing without the Promise controller)
4. restart before capture
3. Turn any active background proces off
5. Change the screen resolution to 800*600, 256 colors and 60Hz refresh rate
6. without preview capturing (Hide on capture enabled)

VirtualDub 1.6.2 Setting
- Video Soure: Composite
- Capture Format: YUV
- Capture Resolution: 720x576 PAL
http://xs10.xs.to/pics/05010/VDub.setting.02.jpg

http://xs10.xs.to/pics/05010/VDub.setting.03.jpg

http://xs10.xs.to/pics/05010/VDub.setting.04.jpg

http://xs10.xs.to/pics/05010/VDub.setting.05.jpg