Capture Mystery with Dreadful side-effect - Help!

NeilPorter wrote on 12/13/2003, 2:42 AM
Hello All,

From reading the documentation it is my impression that a scene change occurs when the camera is switched cyclically from Record to Pause and back to Record etc. i.e. basically, on and off. It therefore follows that, when capturing, a clip is a scene is a clip, unless the 4GB limit is exceeded.

I have noticed that many of my scenes are broken into one or more clips even though they are qute small. The sizes and time positions of the clips appear random and I can see no pattern. I have tested this out with a very long single scene of about 19 minutes. I have captured this scene over four times in order to find out what is happening. At best it breaks up into 12 clips but sometimes it is more. They are not the same clips each time. i.e the sizes and time positions are different. I feel that this is aberrant behaviour and will do me no good.

Worse, many of the clips are set to Upper Field First or None (Progressive) when, as I am working in PAL, they should ALL be set to Lower Field First. Some of you may recall that I had this problem some months ago but did not know why it was occurring. I am now quite sure that it occurs during capture.

In order to stall off some questions from you all, please note that:

- I have cleaned the heads of the camera with a cleaning tape (20 secs as per the manual instructions).

- My computer system is well-tuned for audio and video recording and editing and has no background tasks running.

- The captures were made to a brand new 120 GB latest speed EIDE drive installed as secondary master.

- No dropped frames have been detected.

- The 4 GB limit has not been reached.

- In Preferences/Disk Management, the Maximum size per clip box is NOT ticked.

- Scene detection is enabled.

- My capture card appears to be installed perfectly.

Some specs:

- I am running an AMD Athlon 690 mHz cpu with a Gigabyte motherboard.
- I am running Win98 SE with all MS updates, bug patches etc installed.
- I am using Vegas 4.0d
- I am using Sony Vegas Video Capture as supplied with Vegas 4.0d.
- My camera is a Panasonic NV-DS38A MiniDV e.cam
- My capture card is a Pinnacle DV Studio Plus (this model only available in UK, europe and Australia as far as I can see).

Some questions:

1. Does anyone own this same Panasonic camera and is it a known problem with capturing split-scene clips?

2. Does anyone own this same Pinnacle capture card and is it a known problem with capturing split-scene clips?

3. Has anyone had a problem with split-scene clips?

4. Has anyone had a problem with captured clips being a mixture of Lower Field First, Upper Field First, and Progressive when they should all be Lower (or Progressive or whatever)?

5. Does anyone have any answers or suggestions?

6. If I am stuck with this problem, it is manageable except for one MAJOR bother ..... I cannot see how to batch change the properties of every captured clip to Lower Field First. I have tried block selecting (highlighting) the clips in the Media Pool, right-clicking etc etc etc but nothing works other than changing one clip at a time. This would really be a BIG help if I could do this.

Sony Please Note - please can we batch change the properties of a set of clips easily? ..... in Vegas 5 or whatever ..... Or all the clips in the whole project easily .....

Thanks all, ahead of your kind assistance. Go heros .....

Regards,
Neil Porter

Comments

PeterWright wrote on 12/13/2003, 3:15 AM
Neil,

Not sure if the Pinnacle card is OHCI compliant, but it needs to be for best results.

It does sound like something strange is happening with your camera. The lower field first PAL DV thing happens in camera at recording time, and the resultant footage should just be transferred to HD.

I would suggest disabling scene detection in Capture preferences, which will prevent things getting chopped up too small. You can then subdivide after capture.
TorS wrote on 12/13/2003, 4:01 AM
Neil,
I have had capture problems, and among the prime suspects was the Pinnacle card. In the process I changed it for a ADS Pyro card. But I also changed other things - notably the order of the PCI cards. The problem went away and I got no solid explanation of its causes. I am leaning towards a combination: One certain PCI order caused a slight conflict between the capture card and something else. The conflict was not severe enough to be detected by Windows. The Pinnacle card reacted to it but the ADS does not.

(This whole theory may be on the level of the old man thinking about conversations going through telephone lines and wondering how they can make a hole in the middle of such long things.)

Tor