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The compression quality for MPEG-4 or WMV recording can be controlled with the "VidCap Quality" STATE variable.
Recording to H264 converts the original stream to RGB, and encodes to H264. If the original stream is H264 then it will do a decode and encode.
If the original stream is H264 and you want to just record that directly then record as RAW.
RAW video files of 10-bit, 12-bit or 20-bit pixels are packed to conserve space. 10-bit is packed four pixels to five bytes, 12-bit is packed two pixels to three bytes, and 20-bit is packed two pixels to five bytes. The packing is like this:
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