Tips for Reducing WMV moire?

[Chris Blair]

Are you using the same data rates? What version of WMV are you using? Version 8.0 used to do that but version 9 is a pretty good codec. It’s just a variant of the VC-1 codec that’s used for a lot of Blu-Ray DVD compression.

If you use WMV 9 advanced profile, you should be able to get output that compares favorably to H264. If not, try upping the data rate 20% or so on the WMV.

Some other questions:

1. Are all your encoding parameters the same, meaning are you deinterlacing, filtering, frame rates the same etc.

2. What are you using to encode your WMV…what application?

3. What are you playing them back on? Some media players aren’t real fond of certain formats/codecs. For instance, a media file will often look completely different in VLC than it does in Quicktime or Windows Media Player or RealPlayer.

Let us know.

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com
Read our blog http://www.videomi.com/blog

[Daniel Low]

Check your deinterlacing settings.

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Sent from my iPad Nano.

[Brandon Adams]

Thanks Chris.

I gave it a shot with Standard and Advanced profile, as well as a variety of data rates. All settings are the same. Exporting from FCP via Quicktime Conversion to WMV using Flip4Mac. Using Quicktime via Flip4Mac to play back, but I get the same thing in VLC and MPEG Streamclip.

I’ll have to chat with the Flip4Mac people and see if they have any input.

I had to deliver today, so I “resolved” it by doing 2 layers in FCP with one layer being a soft focus filter below the neck. Worked out fine at the 640×360 resolution they needed.

-Brandon

[Brandon Adams]

Input type: Progressive
Output type: Progressive

-Brandon

[Daniel Low]

I’ll repeat, check that you are not applying any deinterlacing filets or frame controls.

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Sent from my iPad Nano.

[Brandon Adams]

? Am I missing something? I just said the export settings are set to progressive for input and output. There are no other settings relevant to deinterlacing in the Flip4Mac export options.

-Brandon

[Daniel Low]

I don’t use f4m or compressor anymore but the most common cause for Moire is applying a deinterlace step to progressive material.

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Sent from my iPad Nano.

[Brandon Adams]

Ok, thanks Daniel. I’ll see if I can find anywhere in the chain that might be occurring

-Brandon

[Chris Blair]

I’ll second that on double checking the deinterlacing. That’s why I asked about it in my first reply. WMV isn’t as good or as efficient a codec as H264, but there shouldn’t be that big a difference, especially at data rates above say 1200-1500Kb/sec.

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com
Read our blog http://www.videomi.com/blog