Flicker

fammonti wrote on 1/15/2004, 12:08 AM
Hi everibody,

I have a flickering problem with a DVD produced with DVDA.

I have captured a VHS Video with a Pinnacle DV500, then I have produced an MPEG2 file with Vegas using the DVD template (VBR - max 8,000 - average 6,000). Then I have produced a DVD simply adding menus and background music. If I watch the DVD video on my PC Monitor or on my TV through the TV-out of my Nvidia Geforce 4 Ti 4200 everything looks fine

The final result flickers .. and not just a little bit.

Can this be due to my using an external USB 2.0 NEC burner connected to an USB 1.1 port?

If not, what is the reason for this inconvenience?

By the way: my DVD player is a brand new Pioneer DV 360.

Thanks to those who will help me.



Andrea

Comments

farss wrote on 1/15/2004, 2:17 AM
It sounds like somewhere in the chain you might have gotten the field order mixed up. If thats the case I think static images will look OK but anything with motion in it will flicker.

I'm just guessing here so bear with me.
fammonti wrote on 1/15/2004, 11:37 PM
I'm afraid ther problem has nothing to do with filed order. I tried both lower and upper by setting projiec settings and encoding settings the same way.

I even tried with importing the original AVI File into DVDA and letting it do the encoding, but alas no change ...

I even tried with another DVD authoring software ... no change again!

I really don't know.

Andrea
farss wrote on 1/16/2004, 5:35 AM
Well apart from the DV500 which I guess captures to AVI and that plays out with no flicker the only other suspect is your STB DVD player.
You see on a PC you're seeing a progressive scan display so field order is rather irrelevant I think as the fields get merged.

Whe you say "flicker" is it like dark frames or is it actual skipping of frames. Possibly the bit rate is too high for the player. The DVD spec says all players should play DVDs at up to 9.8 MB/sec but surprisingly I've heard that many of the expensive ones don't. Also there's a bit of a trap, 9.8 MB/sec is max bitrate for the entire stream, not just the video but the sum of all the video streams, the audio streams and subtitle data. One stereo PCM track adds I think about 1.5 MB /sec. Also Hollywood DVDs run at quite low bitrates usually so they'll most likely play OK.

Try lowering the bitrate say 1 MB / sec and see how that goes.
wobblyboy wrote on 1/17/2004, 11:09 AM
Your problem might be related to startling with VHS as the source. You might also try running the Broadcast Color checker in Vegas.