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Epic IY Encoding Fail (Help would be much appreciated! :])

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vuzedome:
CRF 15 will produce rather large files. Try 18 or 20.

Takeshi:
I tried doing CRF with megui, but it's only one pass (one!) so I usually just use "Automated 2pass" with an analysis pass in the beginning. I feel like I am getting more compression so I don't mind the extra time. However, still trying stuff out so...

blubart:
i wouldn't go lower than crf16 (superb quality). crf18 should be enough in most cases. generally the higher the resolution the higher the crf value you can get away with without it starting to look bad. i most likely wouldn't go above 21/22 for a 1080p encode.

crf is not better or worse than a 2pass encode.
2pass encodes to a specific bitrate/filesize. this of course means that with the same bitrate 25 minutes of a static images would result in the same filesize as 25 minutes of high motion scenes - thus it's up to the encoder to decide which bitrate fits the specific source.
crf encodes by quality. predicting which scenes will be less "important" (because they are for example fast motion scenes where our eye wouldn't be able to track a super sharp and detailed picture). this can result in a huge filesize variance (which is not a bad thing per se, as it just means that specific episode requires more bitrate to keep the same quality). perfect for novice encoders and people who don't want to waste a lot of time (crf requires only one pass with only a marginally worse compression ratio compared to 2pass).

Takeshi:
@blubart; ;)

Funny facts:

I've done a 2-automated encode of Battle Royale I which lasted for 2x8 hours of pure encoding = a 1,26 GB file.
I've done a CRF16 encode of Battle Royale II which lasted for 9-10 hours of pure encoding = a 2,21 GB file.

Either there was a big demand of quality because of high-motion scenes in the second movie as opposed to the first one or this CRF has a bad compression ratio.

Battle Royale II would result in a final filesize of 2,61 GB when I add the audio track. That's fucking huge, but then again this is what CRF produces, right?

Personally, I've been looking for a way to achieve almost exact same quality on the DVD, but it kinda bumps me out that I have to present such big files in order for that to happen. I take it CRF1-15 would produce much bigger files with no apparent difference in quality?

vuzedome:
Just don't go below 16.

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