Reduce flickering

Cunhambebe wrote on 6/9/2005, 9:23 AM
This subject may have been addressed thousands of times around here, but I definitely can't fix one of my sequences. I have tried everything. I'm rendering to NTSC progressive (intended for DVD, since DVD players iterlace on the fly for regular TVs and this way the video is ready for progressive TVs). The video plays so well on PC (as expected) but on regular TVs, anyone can notice all that flickering or whatever you call'em. The sequence is made up of a series of JPEG files. I've tried inserting a video envelope selecting Video Supersampling by a factor or 3 and 4 (since I'm rendering as progressive, checking the box "reduce interlace flicker" won't make any difference). Some people told me to insert a video envelope, blurring a bit my sources. It seems to work, but the result is not that sharp..What do you think?
Thanks in advance.

Comments

TheHappyFriar wrote on 6/9/2005, 9:36 AM
you can't really do much. I belive it's the interlace that's making it flicker. I recomend making a pan/crop with the pictures movie very slightly (ie a zoom in/pan across). I normaly do that with all my pics's on DVD & don't notice flicker that much.
Cunhambebe wrote on 6/9/2005, 9:48 AM
Are you sure? I'm about to blur some portions of the timeline inserting a video envelope. Please check some of videos at...
http://www.lwg3d.org/forums/showthread.php?t=25287
You'll notice aright at the beginning those white waves near the bottom of the screen. The flickering was corrected later by inserting a video envelope to blur the source (those videos at lwg3d are not corrected).
Thanks in advance
TheHappyFriar wrote on 6/9/2005, 9:54 AM
well, what I do if I'm not sure is I take a few seconds & do everything to it: 2 seconds of moving, 2 seconds of blur, 2 seconds of sampling, 2 seconds of... Burn that mpeg to a DVD & play it to see what it looks like. I do that a lot with my analog footage as sometimes it doesn't behave properly when capturing. :)
Cunhambebe wrote on 6/9/2005, 9:56 AM
Please take some time to watch my videos and tell me what you find...
thanks
Cunhambebe wrote on 6/9/2005, 12:13 PM
No one.....Anyone, please????
Redio wrote on 6/9/2005, 3:37 PM
Hi Cunhambebe

I think you will get bigger response if you uploaded your video in another format than XVID and at a lower resolution ex. 512 kbs WMV.

To your question.
If it only small portions in some photos, where the flickering are, you could open those photos in a photo editor and blur, color correct or lower the contrast of those portions. Then it’s only those portions that are blurred and not the whole video.

Rune
Cunhambebe wrote on 6/9/2005, 7:20 PM
Thanks for the input. I've already fixed it. I have inserted a video envelope and some motion blur in certain sources where there was severe flickering. It looks perfect on TV now! Now the problem are the subtitles in DVDA, but this is another story, maybe the bitrate was too high, upsetting the player....

Redio wrote this:
.... I think you will get bigger response if you uploaded your video in another format than XVID and at a lower resolution ex. 512 kbs WMV......

- thanks for your remark, but I don't know any codec better than Xvid nowadays; nothing against WMV, I just dislike it. That video was not intended exclusively for this forum, that's why the bigger size. Hope you understand.
thanks a lot
RichR wrote on 6/9/2005, 7:32 PM
you can also select "reduce interlace flicker" from the properties drop down list.
Cunhambebe wrote on 6/9/2005, 7:39 PM
Thanks for the input, but I'm rendering to progressive so I guess this feature won't help that much.
Thanks anyway.
TeetimeNC wrote on 6/10/2005, 2:59 AM
Try reducing the size of your JPEGs to 720x480, or if using pan/crop - the minimum size needed to give you full 720x480 throughout the p/c.

-jerry
Cunhambebe wrote on 6/11/2005, 11:39 PM
This is also a good idea (thanks a lot) but I guess the best solution is to blur the video (Gaussian Blur) or inserting a video envelope (this will give you another kind of blur, similar to that one you see when cameras turn from one direction to the other one a little fast).
:)