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<blockquote data-quote="tourettes" data-source="post: 883170" data-attributes="member: 10858"><p>It is good to remember that using ffdshow for subtitles will cause every video texture to be copied from GPU RAM to system RAM and back to GPU RAM. Also it will disable DXVA. ffdshow's DXVA support for subtitles is a hack and causes corrupted video frames and/or subtitle bitmaps on some context as it is modifying the data on reference video frames that are stored in the GPU memory. Those modified video reference frames then are used for decoding some future video frames and the path for the disaster is just waiting to happen.</p></blockquote><p></p>
[QUOTE="tourettes, post: 883170, member: 10858"] It is good to remember that using ffdshow for subtitles will cause every video texture to be copied from GPU RAM to system RAM and back to GPU RAM. Also it will disable DXVA. ffdshow's DXVA support for subtitles is a hack and causes corrupted video frames and/or subtitle bitmaps on some context as it is modifying the data on reference video frames that are stored in the GPU memory. Those modified video reference frames then are used for decoding some future video frames and the path for the disaster is just waiting to happen. [/QUOTE]
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