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Joined 1 year ago
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Cake day: July 1st, 2023

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  • I have some comments based on personal experiences with GPU av1 encoding: you will always end up with either larger or worse output with GPU encoding because currently all the encoders have a frame deadline. It will only try for so long to build frame data. This is excellent when you are transcoding live. You can ensure that you hit generation framerate goals that way. If you disable the frame deadline, it’s much much slower.

    Meanwhile CPU encoders don’t have this because CPU is almost never directly used in transcoding. And even with a frame deadline the output would still not be at the same speed as the GPU. However the CPU encoders will get frames as small as you ask for.

    So if you need a fast transcode of anything, GPU is your friend. If you’re looking for the smallest highest quality for archival, CPU reference encoders are what’s needed.