HD to SD DVD aliasing issues

[Jeremy Garchow]

Ernie, please trust me. You need to make 720p30 Varicam settings from the 23.98 settings that AJA provides. MAke sure to choose the right codec.

NOW, that being said (I have been saying that being said a lot), you should not be having these issues, Ernie. I need to see what you are seeing, can you please post 5 seconds of each mpeg2 (the COmpressor down convert and the SD timeline down convert)?

Or if you don’t feel comfortable I’d even be willing to send a compressor preset to get your DVD ready. I know this preset works as I have used it.

[Ernie Santella]

Jeremy,

Here’s two links to two clips. I grabbed these off the two DVD’s using Cinematize. The ‘Bad’ clip is from HD and the ‘Good’ is from a HD-to-SD conversion in FCP.

Notice the aliasing on the engine fan belt and on the following shot of the grain tower is terrible.

https://www.santellaproductions.com/bad.mov
https://www.santellaproductions.com/good.mov

[Jeremy Garchow]

Finally.

Thank you.

Okay.

Have you marked your movie in Compressor as 16×9 and the track you used in DVDSP as 16×9?

What it looks like to me is either a bad field setting somewhere in your chain (like a bad deinterlace would look, and there are plenty of places in compressor to mess it up) or an aspect ratio conversion problem.

Jeremy

[Ernie Santella]

[i]Have you marked your movie in Compressor as 16×9 and the track you used in DVDSP as 16×9?[/i]

YES

[i]What it looks like to me is either a bad field setting somewhere in your chain (like a bad deinterlace would look, and there are plenty of places in compressor to mess it up) or an aspect ratio conversion problem.

I’ve tried every setting you can for Progressive frame rates in DVDSP. The only last thing to do is to try the suggestion of creating a 720p30 timeline instead of 720p60. I’ll do some tests for that.

Other than that, I may have to pay a local editor to come over and trouble shoot it for me. I hate things like this!

Thanks for all your help and suggestions. The Cow is the greatest place on earth. It’s awesome that everyone is willing to help each other. We all go through issues and it’s nice to have have a place to go when you really need it!

[Jeremy Garchow]

If I send you a preset, will you try it out?

[Ernie Santella]

Sure, at this point, I’ll try anything.
Thanks!

ernie@santellaproductions.com

[Jeremy Garchow]

Email, sent.