![]() ![]() ![]() X264 -crf=18 -keyint infinite -output out.264 input.avs Using x264 encoder and 1 pass CRF mode, outside of Vegas using DMFS, I used this line, bitrate will be set literally close to audio bitrate only, and it looks ok (because of CRF 18 setting): The further keyframe is for static picture, you save more bitrate. Usually the keyframe is set to 250 or so, so data for that picture needs to be included at that keyframe, you want keyframes as far as possible from each other, because video is not changing. The thing is keyframe for picture only could be longest possible, not sure what is the limit for H.264 (maybe infinite is by specs) and what is the limit for YouTube (if there is a such a thing). I encode CRF from Vegas using DebugMode Frame Serer. It sets lowest bitrate possible that meets your expectation for desired quality. No bitrate guessing about bitrate is involved using CRF. That is what CRF encoding is good for, but unfortunately Vegas can export VBR or CBR only (mp4). Let me just elaborate on this a bit, it is a nice question. So if that's correct, after reading text below, you know it would be a nuisance a bit. I do not have latest versions of Vegas in PC at the moment, but look for keyframe settings, but I think it is not there for MainConcept avc and Sony AVC. Tried 1pass CBR and it is complete waste of bitrate and not even looking good using 1,000,000 bitrate. ![]() To do it 2pass is kind of overkill for these kind of videos. Testing 384,000 gave me some slight disturbing effect at the beginning but then it was ok. Testing MainConcept avc export, 1pass VBR in Vegas (Variable bitrate) for fullHD picture, setting 768,000 video bitrate was ok. ![]()
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