I.e. in most case (if not all), the garbled/blocky playback, or whatever it is called, is at the start only.
If it is a longer clip, well, one might forget about the start and pick up the rest, but in case of just short clips most of the introduction may fall away which could be essential.
Below some examples.
I noticed that it involves wmv9
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![Image](http://i528.photobucket.com/albums/dd330/phwul/VLCchoppyplaybackofwmvfiles-01-11062013122709_zps9dc228c6.jpg)
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![Image](http://i528.photobucket.com/albums/dd330/phwul/VLCchoppyplaybackofwmvfiles-02-11062013122715_zps274e79a5.jpg)
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![Image](http://i528.photobucket.com/albums/dd330/phwul/VLCchoppyplaybackofwmvfiles-03-11062013122423_zps2552fcfa.jpg)
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![Image](http://i528.photobucket.com/albums/dd330/phwul/VLCchoppyplaybackofwmvfiles-04-11062013120817_zps1097ddf4.jpg)
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TIA
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