Codec and reading data from the disk [Archive]

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kolak

25th March 2021, 01:03

How difficult is to write RAW codec (aka BRAW, Cineform RAW) which can be decoded at partial resolutions and also read partial data from disk saving this way needed bandwidth?

So, eg. 8K file has has 2000Mbit bitrate, but decoding at 1/2 resolution requires just 500Mbit.

Asmodian

27th March 2021, 22:20

If you also want it to have good compression efficiently, very difficult.

kolak

28th March 2021, 16:08

Normal (intermediate codecs) efficiency- ProRes etc. alike.

According to Cineform developer it's rather easy (maybe at least for wavelets).