User:Mai X/HEVC: Difference between revisions
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(Created page with "Here I want to explane some effective ways to transcode or re-encode video (with or without audio). I'll give a list of codecs that I use regulary. Also I'll compare some code...") |
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Here I want to | Here I want to explain some effective ways to transcode or re-encode video (with or without audio). | ||
I'll give a list of codecs that I use regulary. Also I'll compare some codecs by main parameters. | I'll give a list of codecs that I use regulary. Also I'll compare some codecs by main parameters. | ||
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Revision as of 03:56, 31 July 2022
Here I want to explain some effective ways to transcode or re-encode video (with or without audio).
I'll give a list of codecs that I use regulary. Also I'll compare some codecs by main parameters.
Video Features
About pixel formats, alpha-channel, bpp and YUV-subsampling.
Special words:
- BPP (bpp) - Bits Per Pixel (Total bits for 1 pixel, i.e. RGB24 - 24 BPP).
- BPC (bpc) - Bits Per Channel (bits for 1 component of a pixel, i.e. RGB24: 3 components - R, G, B; So 24/3 = 8; 8 BPC).
- VFW (vfw) - Video For Windows. For more info - go here.
Pixel formats
These pixel formats are the most useful for me:
RGB24- raw RGB samples without alpha-channel (8 bpc). Can be compressed.RGBA32- raw RGB samples with alpha-channel (8 bpc). Can be compressed.YUV 4:4:4 (YV24)- YUV format with highest bpc subsampling. Can be used with 10 or 12 bits profiles in H.26x codecs.YUV 4:2:2 (YUYV/YUY2)- Same as above, but with lower bpc subsampling. Can be used only with 8 or 10 bits profiles in same codecs.YUV 4:2:0 (NV12/YV12)- Same as above, but with the lowest bpc subsampling. Can be used only with 8 bits profiles in same codecs.RGBA64- raw RGB samples with alpha-channel (16 bpc). Can be compressed. Not really useful, because 8 bpc is enough for everything.