why do i get blank frames

sakkakth wrote on 7/21/2003, 9:20 AM

hi, i'm having a problem only in vegas where with an mpeg file i'm editing seems to have blank frames. i've played the file in 2 other editors and the files work fine so i figured there has to be some setting i'm missing.

i thought it was frame rate but i tried several different combinations and nothing helped. it's in the same part of the file, once it plays thru those blank frames the video stays black in the preview until i stop and restart in a different area of the project. it renders the same way as well, completely black after a few seconds of playtime.

i have the latest patches, latest video drivers.

windows xp
amd 1700
radeon 7200
700+ RAM
video source was from a sony TRV19 camera xfered in thru USB to their proprietary software.

thanks

Comments

mcgeedo wrote on 7/21/2003, 9:36 AM

Someone else may be able to offer you some help on editing mpegs, but my recommendation based on my experience is don't edit mpeg. Render to DV, edit and then render to what you need for output (maybe mpeg again).

mpegs, as you may know, use a reference (complete) frame followed by a number of difference frames. Moving back and forth along the time line, VV (or any editor) has to try to figure out what is on the frame that is currently showing. While this is possible, it is a challenge and many editors don't do very well with it.

When I first started, I was editing mpegs (on VV3) and had a number of "black frames" appear in my work. After changing over fully to DV, I now only edit DV, and that problem has disappeared.

Best of luck,
-Don

sakkakth wrote on 7/21/2003, 12:14 PM

thanks, can i just save it out as a new file type from a program that does view it correct or do i have to get my source tape?

phonelover wrote on 7/24/2003, 4:59 AM

Hi,
VV3 and VV4 cannot manage MPEG-2 editing though they are able to import such files.
There nothing to do, every now and then the header gets corrupted and the video is rendered with 12 black frames.
The problems is in Vegas, because the MainConcept plugin works well.
Converting to DV means having a huge file...
You may open the MPEG-2 file in Vegas, and render it as it is (don't do any modifications!) to DV1 or DV2. Then VV will be able to correctly edit this new file.

Anyway, for the future I suggest you to capture in MPEG-2 I-frames only. This way, Vegas Video will correctly manage your file and no black frames will appear. This was tested by me and by some other users, with perfect results. Moreover, capturing in I-Frames only gives you better quality and better performance in seeking/rewinding your video while editing it.

sakkakth wrote on 7/24/2003, 9:33 AM

thanks guys, i reloaded my video into vegas as a different format and worked great