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Old 21st November 2021, 18:12   #101  |  Link
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Originally Posted by Loomes View Post
Sounds interesting. Could you please give a bit more information / sources about chunk encoding? I get the idea but how to approach this technically?
It works like this

You basically divide your video clip virtually in avisynth script with Trim function and then encode all chunks at once. Then you combine all .265 files into one and mux. With this approach i can easily saturate even Threadripper 64C/128T using just 720p source.

Last edited by Atak_Snajpera; 21st November 2021 at 18:16.
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Old 21st November 2021, 21:41   #102  |  Link
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There are problems with it as well: VBV buffer flow, VBR efficiency with very short chunks, but in most cases it works fine. You also should use stitching option in encoders and make sure headers are set correctly, specially for the last chunk.
SPS/PPS should also be set properly (for ts muxing) as some hardware boxes don't like if those change during one video.
You should also put some attention where you place chunk points, eg. best are scene changes. In case of streaming need of fixed I frame distance chunks points should be rather aligned to them.
For perfect streams it's not as easy as simple divide to n parts and encode them simultaneously, but it can be done. It all depends what is the end target.

Last edited by kolak; 21st November 2021 at 21:49.
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Old 24th November 2021, 17:35   #103  |  Link
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| CPU ....................| x264 | x265 | LAVC | auto | MMX2 | SSE | SSE2 | SSE3 | SSE4 | AVX | AVX2 | All |
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Old 26th November 2021, 19:28   #104  |  Link
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Yet nobody with Alder Lake?
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Old 26th November 2021, 21:33   #105  |  Link
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Originally Posted by tormento View Post
Yet nobody with Alder Lake?
We would honestly need to get the benchmark updated for anything in Alder Lake to be relevant.
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