Shoot 30p...still get interlace flicker

digitaldevin wrote on 5/31/2012, 8:23 AM

I used the Sony NEX-5U camera set on 30p to film. I used Sony 11 Pro to edit. I render out 720p and get interlace flicker. What gives? I'm seeing "trails" and "halos" all over the place, not to mention blended fields with one shot and the next combined.

Any help would be appreciated.

Comments

digitaldevin wrote on 5/31/2012, 9:09 AM

Oh, and yes, I use the "reduce interlace flicker" command on the footage before rendering. AVI file looks fine, it's when DVDA compresses it for a DVD that I get the flicker really bad.

Former user wrote on 5/31/2012, 9:12 AM

So you are making a Standard DVD from a 720P file. DVDA is probably compressing it to an interlaced DVD file.

You should use VEGAS to compress to your DVD file.

Dave T2

Tech Diver wrote on 5/31/2012, 10:30 AM

I believe the issue may be true 30 fps vs ntsc 29.97.

Peter

Bob Mark wrote on 5/31/2012, 11:03 AM

Keep in mind that the DVD spec is 60i. As mentioned, I would create the DVD file in Vegas too. Since you shot 30p you don't have any interlaced fields. If you shot 30p with high detail on the camera you might see artifacts when it is down converted to SD for DVD.

Rainer wrote on 6/4/2012, 5:35 AM

You did disable resampling, didn't you?

farss wrote on 6/4/2012, 7:35 AM

Shooting with the NEX-5 some aliasing is inevitable, the optical low pass filter in the camera is setup for shooting high resolution stills, not 1080 video. This problem you would probably see with your camera original footage at Best / Full. Once it's in the camera original it is impossible to get rid of.

Your other problems with interlace artifacts suggests something else is going on as well. You should edit on a 1080p 30 fps timeline, when rendering to 720p make certain you are rendering at Best.
The merged frames at cuts could be because you have Quantize to Frames set to Off. It could also be because you are encoding at low bitrate.

The interlace flicker could be because you're watching this on an interlaced display e.g. CRT TV or monitor. A few more details would help us help you.

Bob.

Steve Mann wrote on 6/4/2012, 7:58 AM

"it's when DVDA compresses it "

Here's your problem. Never, ever let DVDA recompress your video. You are guaranteed a hit in quality and you have no control over the compression parameters. Do it right in Vegas and DVDA won't have to recompress.