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LoRd_MuldeR · 23rd September 2018, 15:05

At the moment, you are probably using CRF mode. This can produce a way smaller or larger file, at the same CRF value, depending on the "complexity" of the content.

If you need to hit a specific file size, better use 2-Pass mode. This allows you to specify the target (average) bitrate in such a way that the desired file size will be hit exactly – and you'll still get the best possible quality out of that file size.

Of course you could also try to fiddle around with the CRF value until it happens to produce a file of the desired size. But that's effectively like doing 2-Pass the hard way "by hand".

(BTW: If you try to squish a "grainy" movie into a small file size, the results may not look that great, no matter what. In that case, pre-processing with a good denoise/degrain filter, e.g. MDegrain, can work real wonders!)

23rd September 2018, 15:05	#3 \| Link
LoRd_MuldeR Software Developer Join Date: Jun 2005 Location: Last House on Slunk Street Posts: 13,248	At the moment, you are probably using CRF mode. This can produce a way smaller or larger file, at the same CRF value, depending on the "complexity" of the content. If you need to hit a specific file size, better use 2-Pass mode. This allows you to specify the target (average) bitrate in such a way that the desired file size will be hit exactly – and you'll still get the best possible quality out of that file size. Of course you could also try to fiddle around with the CRF value until it happens to produce a file of the desired size. But that's effectively like doing 2-Pass the hard way "by hand". (BTW: If you try to squish a "grainy" movie into a *small* file size, the results may not look that great, no matter what. In that case, pre-processing with a *good* denoise/degrain filter, e.g. MDegrain, can work real wonders!) __________________ Go to https://standforukraine.com/ to find legitimate Ukrainian Charities 🇺🇦✊ Last edited by LoRd_MuldeR; 23rd September 2018 at 15:11.