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24 lines
695 B
Plaintext
24 lines
695 B
Plaintext
Veejay processing
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=================
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Veejay processes nativly in YUV, this is to keep colorspace conversions
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to a minimum.
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YUV 4:2:0 Planar ( 1 Cr and 1 Cb sample per 2x2 Y samples)
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YUV 4:2:2 Planar ( 1 Cr and 1 Cr sample per 1x2 Y samples)
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(both full range JPEG and clipped to 16-235 / 16-240)
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Places where veejay uses software conversion:
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Conversion from RGB to YUV is for webcam devices.
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Conversion from YUV to RGB is for preview image
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Some FX convert the frame to RGB
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Why YUV ?
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=========
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- Many video codecs decode into some YUV flavour
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- Many capture devices deliver YUV
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- Software conversion of RGB <-> YUV is expensive
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- Consumes less bandwith then RGB
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