Blank Frames

rruddle wrote on 1/27/2004, 8:35 AM
I don't have a FireWire card and am capturing video via the software that came with my camcorder (JVC GR-DV500U). The capture software that came with the camera (ImageMaker with VCD ver1.1) is a piece of crap but its all I have. The captures are saved as MPG files. When I view them in Windows Media Player, they play fine. It seems as if there are blank frames captured (when I key through them). When Vegas hits a blank frame when playing the video, it stays blank.

Before I go out and dump cash on a firewire card, I want to see why this is happening.

I have Enhanced 2.0 USB ports on my Dell. The throughput should be fine for capturing video. I have a 2.8 mhz machine with 512 mb of ram.

Is the only way to place video on Vegas' timeline through capture? Can you not bring in already captured mpg1 files?

Any help would be greatly appreciated.

Comments

Jsnkc wrote on 1/27/2004, 9:02 AM
You'd be better off getting a firewire card and capturing as AVI's, by capturing MPEG's and trying to edit MPEG's you are just asking for problems, and the black frames that you are experiencing.
rruddle wrote on 1/27/2004, 9:21 AM
Are the black empty frames inherent of capturing as an MPG? Am I tied to capturing as an MPG using USB? Is there any way to capture as an avi using USB as Enhanced USB 2.0 is supposed to be as fast as FireWire?

Thanks for your input!
Chienworks wrote on 1/27/2004, 9:39 AM
Black frames aren't inherent to the MPEG format. Let's say rather that the structure of the MPEG format lends itself to problems more readily when the MPEG encoder is poorly written (if you can see the difference). MPEG files created by a good encoder will work well in Vegas, although editing them will be a very slow task. I would guess that the software that came with your camcorder probably includes a very poorly written encoder.

Yes, it is physically possible to capture DV .avi through USB 2.0. However, everyone does it with firewire because all the good cameras and capture software are created to work with firewire, and all the good cameras and capture software are created to work with firewire because everyone uses firewire for DV .avi captures. There just isn't enough interest and practically no need for USB for this task, so no one invests the time or money to make it work. You can get a firewire card for your computer and a 4pin to 6pin firewire cable for probably less than $30 total. Just go for it and you'll be much happier.
rruddle wrote on 1/27/2004, 9:51 AM
Thanks for your time and input. I will go the FireWire route as this is quite frustrating!

Rick
Former user wrote on 1/27/2004, 11:59 AM
YOu will be very happy with firewire capture, and the cards are not that expensive. I only paid about $20 each for my two and they have worked great will all of my software.

Dave T2
HPV wrote on 1/27/2004, 4:38 PM
Your video stream is shorter than the audio stream. Set ruler format (Options menu) to NTSC non drop frame (or samples) and single click on the file in the explorer window. You'll notice that the times listed on the bottom of the explorer window aren't the same. Can also be seen on the timeline if you horz. zoom into it. Firewire captures can also have this problem. Sony/Sofo have never explained why this happens or if they can fix it. BTW, it also happens with DVCAM which has locked audio.
Simple fix is to trim the tails on files/events.

Craig H.
rruddle wrote on 1/28/2004, 6:33 AM
Do I need to trim the audio track in an external editing program by actually shortening it? Or can I just slip-trim the audio event?
rruddle wrote on 1/28/2004, 8:37 AM
Craig,

A question came to me...

When I place an mpg file on the timeline, the audio is grouped with the video. The damage is already done to the video. How will trimming the audio fix the added video frames?
HPV wrote on 1/28/2004, 8:58 AM
Are the blank/black frames at the end of the mpeg clip only ? I assumed that was the case, but not sure after re-reading your original post.

Craig H.
rruddle wrote on 1/28/2004, 10:42 AM
No, they actually show up in the middle of the clip.

Rick