capturing problem Audio dropout

lan_matrix wrote on 7/31/2004, 3:05 PM
While trying to capture DV-PAL video from different events on differnet tapes, I am getting audio drop out or hicupping for
a fraction of a second, while the video stream remains fine.

Play the tape through the tv and a sound system - fine

Recapture the tape and the error occurs at a differnet place on the timeline.

After each re-capture the frame rate is different varies around 25.00(pal) occasionly hitting 25,00

This also cause vegas 5 to break the one scene into into multiply vegas clips

The camera is a panasonic NV-DS28(ieee 1995 compliant), with menu options set to DV output/input enabled

I rebuilt my system completely last sunday, including drive format.

I have no internal pc firewall running and disable norton during capture.

have two firewire port-on board, tried both.


[System Summary] (ieee 2001 compliant)

OS Name Microsoft Windows XP Professional
Version 5.1.2600 Service Pack 1 Build 2600
System Manufacturer ASUSTeK Computer INC.
System Model A7N8X-E
http://au.asus.com/products/mb/socketa/a7n8x-e-d/overview.htm
Processor x86 Family 6 Model 10 Stepping 0 AuthenticAMD ~2205 Mh
BIOS Version/Date Phoenix Technologies, LTD ASUS A7N8X-E Deluxe ACPI BIOS Rev 1008, 5/12/2003
SMBIOS Version 2.2
Total Physical Memory 1,536.00 MB
Available Physical Memory 1.16 GB
Page File Space 4.36 GB
Page File D:\pagefile.sys

[Conflicts/Sharing]

[IRQs status]
IRQ 21 Standard Enhanced PCI to USB Host Controller OK
IRQ 21 NVIDIA(R) nForce(TM) Audio Codec Interface OK
IRQ 21 OHCI Compliant IEEE 1394 Host Controller OK
IRQ 18 Silicon Image SiI 3112 SATARaid Controller OK

[Sound Device]
Name NVIDIA(R) nForce(TM) Audio
Manufacturer NVIDIA Corporation
Status OK
Driver c:\windows\system32\drivers\nvapu.sys (6.14.0431.0 built by: NVIDIA, 313.13 KB (320,640 bytes), 4/03/2004 8:02 AM)

[Display] Dual Monitor
Name NVIDIA GeForce FX 5900 Ultra
Adapter Type GeForce FX 5900 Ultra, NVIDIA compatible
Adapter RAM 256.00 MB (268,435,456 bytes)
Installed Drivers nv4_disp.dll
Driver Version 6.14.10.6176
Resolution 1280 x 1024 x 72 hertz
Bits/Pixel 32
Driver c:\windows\system32\drivers\nv4_mini.sys (6.14.10.6176, 2.35 MB (2,459,968 bytes), 13/07/2004 9:50 AM)

[Adapter] (ieee 2001 compliant)
Name [00000001] 1394 Net Adapter
Adapter Type Ethernet 802.3
Product Type 1394 Net Adapter
Installed Yes
PNP Device ID V1394\NIC1394\479B48E01800
Last Reset 31/07/2004 2:19 PM
MAC Address 72:D3:2B:E5:3A:FA
Driver c:\windows\system32\drivers\nic1394.sys (5.1.2600.1106 (xpsp1.020828-1920), 56.63 KB (57,984 bytes), 29/08/2002 11:33 AM)

[Drives]

Drive C: (cature drive Sata Raid 0 Set- 50Mbyte/sec write)
Description Local Fixed Disk
Compressed No
File System NTFS
Size 223.57 GB (240,054,763,520 bytes)
Free Space 202.65 GB (217,595,850,752 bytes)

Drive D:
Description Local Fixed Disk
Compressed No
File System NTFS
Size 74.53 GB (80,023,715,840 bytes)
Free Space 4.26 GB (4,572,672,000 bytes)

Comments

Spot|DSE wrote on 7/31/2004, 8:57 PM
Sounds to me like you've got a dirty head that is only hitting audio, if the dropout occurs at the same time and you are getting t/c breaks. Have you cleaned your tape heads lately? I see this occasionally on stuff I've shot too, and it's always been dirty-head related. If it plays back 'fine' during preview on a TV without computer in the mix, it still can be dirty heads, but the camera is more tolerant of the issue than a hard drive might be.
If it occurs at same time each time you capture that specific tape, heads/tape are your likely culprits.