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How encryption for Cinema Movies works

(serverless.industries)
230 points perryflynn | 1 comments | 20 Apr 25 17:52 UTC | HN request time: 0s | source
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Animats ◴[21 Apr 25 02:30 UTC] No.43748045[source]▶
JPEG 2000 for each frame? I wonder what they use for decompression. JPEG 2000 decompressors are really slow. Most couldn't keep up with frame rate without GPU support.
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userbinator ◴[21 Apr 25 04:23 UTC] No.43748484[source]▶
Dedicated hardware, not even regular GPUs. JPEG2000 decompression has a rather complex entropy decoding part which is not easily parallisable.
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1. Aurornis ◴[21 Apr 25 13:15 UTC] No.43751675[source]▶
The parallel part would come from batch decoding upcoming frames across multiple cores and buffering the result.

4K at 90fps decoding is easy for commercial decoders with a consumer GPU. The dedicated hardware solutions are out there but they’re not the only way to do it any more.