It's a similar problem for ffdshow with some codecs (like with some applications). Certain codecs won't work as well with ffdshow as with some others. Like we'll soon mention, ffdshow has quality enhancements settings which can cause performance drops.

To disable ffdshow for a particular codec, right-elick on the playing video, select Filters ffdshow Video Decoder, then choose Codecs. Under the Decoder column, click the current decoder and choose a new decoder for the codee. Restart the player or the video to check ifit works. If you get a blank output for that format, follow the same steps and set it to the previous decoder.

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