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Problems with fast motion

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Niklas WikmanProblems with fast motion
by on May 28, 2009 at 9:57:34 am

My source footage is a self-contained DV file (625i).

I want to encode to QuickTime and Windows media. Using the presets in Episode, I want size 640x360, bandwith 1 mbit. For QT I'm using H.264, for WMV it's WMV9. No audio in source.

But when I look at the result, the fast motions look terrible. I have never seen this before and I've done quite many compressions using Episode. The footage contains sign language. Playing the footage in QT player it looks as good it can. (Playing back interlaced footage on computer is never optimal...)

I have double-checked the source interlace (bottom field) and it still looks terrible. What should I do?

Should I NOT de-interlace?

I'm running Episode desktop 5.1.2 on an Intel iMac with OSX 10.5.6.

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Robert LongwellRe: Problems with fast motion
by on May 28, 2009 at 1:18:48 pm

640x360 at 1mbps in h264 (MOV or MP4) should look pretty good. Though depending on the footage, 1mbps WMV may not be quite enough.

Can you describe exactly what doesn't look good in your output files? Are you getting compression artifacts or are you seeing the interlacing?

It would be helpful to see the source and output files. Thanks.

Robert Longwell

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Craig SeemanRe: Problems with fast motion
by on May 28, 2009 at 4:00:31 pm

Yes, "terrible" needs a bit more of a detailed description.
Maybe you need to modify the deinterlace settings for this particular source. It's hard to offer help without details though.

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Niklas WikmanRe: Problems with fast motion
by on May 29, 2009 at 9:17:17 am

I found the lwpass for large downscaling. Now it looks much better.

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