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Re: How to make wmv into flv without artifacts?

COW Forums : Compression Techniques

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Daniel Low
Re: How to make wmv into flv without artifacts?
on Jun 12, 2008 at 4:28:24 pm

Typically the animation codec produces huge files as it's a lossless 4:4:4 codec (when the quality is set to 'best' or 100%). The DV codec on the other hand is a lossy codec with a datarate of 25Mb/s

It's likely that by using the DV codec that you have softened/blurred the picture making it a lot easier to compress. The Animation Codec is probably retaining any artefacts present in the WMVs, rather than it it giving the Flix encoder 'too much' data. That said the Animation codec is slow to decode, as well as encode.

I generally use a keyframe setting of 1 forced keyframe every 3 to 8 seconds, depending on the content and how much accuracy is needed while scrubbing through the clip. For example with a keyframe setting of 1 every 3 seconds will give the clip with much better 'scrubability' but will result in a larger file that should be of higher quality.

You might want to try encoding to a smaller frame size - give 576x432 (4:3) or 512x288 (16:9) a try

Please post back saying what solved your problem. It could help others, and saying 'thanks' is free!

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