Hello,
This is my very first post on this forum. I am sorry for posting on an old thread, but the reason why I am writing here is that I am experiencing the exact same problem as the initiator of this topic, so I thought it would be better not to open yet another thread: whenever I have 2 videos playing simultaneously, they are flickering between each other. This happens absolutely randomly, and ONLY when I split the screen using the track motion option. However, when I have only one video in my overall video window (even when there are transitions between 2 or more videos), everything is just fine, no flickering occurs. So the problem appears only when there is split screen. I assume that using 3 or more videos simultaneously would make it even worse

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I am running Sony Vegas Pro 11 on a PC with an Intel Core 2 Duo E4400 @ 2.0GHz, 3.00 GB RAM and an nVidia GeForce 7300 GT video card (yeah, I know my rig is pretty old, but I have no money for an upgrade at the moment, and so far I haven't experienced such problems with it). My OS is Windows 7 Ultimate 32-bit.
One thing to mention: I am shooting my videos (guitar covers, by the way, just like the initiator :P) with an A4Tech PK-910H webcam. It's probably not the best camera out there, but I've been pretty happy about it so far. I shoot my videos at 1280x720, and 30 fps. The video format is .avi, and the sound format is PCM, or something like that.
Until 2 months ago, I had been my videos with this webcam, and even though it was set to shoot at 30 fps, the luminosity and exposure settings were set at a little too high a value in the webcam's software (which I didn't know), and consequently the camera would drop frames while shooting. Therefore, at the end, the uncompressed videos straight from the camera had an average of like 20... something fps due to those frame drops.
The idea is that WITH those settings (which generated frame drops), everything went fine in Sony Vegas, there was no flickering whatsoever.
Now, 2 months ago I discovered that I could change the exposure and brightness settings of the webcam to a lower value, so that it would finally get to shoot at a constant framerate of exactly 30 fps (and the difference was really noticeable for me, the motion in the videos is much smoother now).
The idea is that as soon as I switched to these new webcam settings, I've started experiencing this flickering problem the initiator was talking about (by the way, if I play the videos straight out from the webcam separately in my media player, there is no flickering, so the source videos appear to be fine...).
I'm using mainly the same project settings as the initiator, except that I've set 29.970 fps as framerate, and I disabled the "adjust source media to better match project or render settings" option. I've even tried enabling it, but to no avail - the flickering was still there.
So far, I've tried a number of things that were recommended in similar threads, all of which did NOT work for me :(:
- restarted Vegas, defragmented the HDD partitions, even restarting Windows;
- disabled resampling for all the videos in the project;
- updating my codecs (I am using K-Lite Mega Codec Pack, which I saw a lot of people dislike...), then completely uninstalling the codecs (I am using K-Lite Mega Codec Pack, which I saw a lot of people dislike...), cleaning the registry and leaving only the codecs that Vegas Pro itself installs.
As I've mentioned above, none of these possible solutions worked for me. The one and only way I've been able to get rid of the flickers is checking each video frame by frame, and whenever there is flickering, I would delete the frame where there is flickering (the flickering occurs during only one frame - in Vegas that particular frame appears to be missing or something - in the video timeline it's displayed as dark green, and it is replaced with the same frame from the other video), and then copy/paste the immediately following frame of that video. So far this has been the only thing that worked for me.
However, this is an extremely tiring task to perform (especially when I have videos with like 7-800 frames or so), and I hope you will agree with me that it's really frustrating to manually check and copy and paste frames to compensate for those apparently missing frames... moreover, there are times when those frames I manually copied and pasted are pretty noticeable in the rendered video, like there is no continuity in the motion and stuff... or maybe I am just too pretentious about it...
So my question is: does anybody have any idea what the cause of this problem could be? Could there something wrong with my PC (as in, is it incapable of properly handling 30 fps videos), or with my source videos? Or is there a problem with Sony Vegas itself, are there any more settings I could try?...
Any kind of help would be appreciated. I apologize for this huge post, but I thought a detailed description of my problem would be of help...
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