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x264 [2017/04/02 22:06] beandog |
x264 [2021/10/17 19:22] beandog |
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| === H.264 levels === | === H.264 levels === | ||
| - | DVDs max out at high 3.1. You don't need 3.2 on DVDs because that is the first level that accepts 720p. | + | DVDs max out at high 3.1. You don't need 3.2 on DVDs because that is the first level that accepts 720p. |
| - | Blu-ray at high 4.1. You can go higher if you want, it's your preference. :) | + | Blu-ray at high 4.1. You can go higher if you want, it's your preference. :) |
| The levels (baseline, main, high) are used to determine which hardware you want to target, and influences what quality you can expect and what encoding features will be used. Blu-ray uses high profile. | The levels (baseline, main, high) are used to determine which hardware you want to target, and influences what quality you can expect and what encoding features will be used. Blu-ray uses high profile. | ||
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| === mtune === | === mtune === | ||
| - | Keep it simple (for DVDs): use ''film'' or ''animation''. For **old** movies or sources that have artifacts already, use ''grain'' or you risk making it even worse. | + | Keep it simple (for DVDs): use ''film'' or ''animation''. For **old** movies or sources that have artifacts already, use ''grain'' or you risk making it even worse. |
| === Choosing an x264 preset === | === Choosing an x264 preset === | ||
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| * [[http://x264dev.multimedia.cx/archives/102|Encoding animation]] - good read for overview of challenges. | * [[http://x264dev.multimedia.cx/archives/102|Encoding animation]] - good read for overview of challenges. | ||
| - | "All of this combines to make animation at first glance deceptively easy–but in reality quite difficult–to encode." So true! | + | "All of this combines to make animation at first glance deceptively easy–but in reality quite difficult–to encode." So true! |
| His tests on x264 | His tests on x264 | ||
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| * uneven multi-hexagon (umh): slow, slower, veryslow | * uneven multi-hexagon (umh): slow, slower, veryslow | ||
| * exhaustive (tesa): placebo | * exhaustive (tesa): placebo | ||
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| - | === Steve's Defaults === | ||
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| - | Here are examples of using H.264 high profile at level 4.1 (Blu-ray settings), with x264 CRF 23 on medium preset. | ||
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| - | Using MP4 as the container will encode the audio to AAC by default. If using MKV, it depends on the encoder, so I'm specifying it directly. | ||
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| - | libav also has an [[https://wiki.libav.org/Encoding/h264|their x264 guide]]): | ||
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| - | <code> | ||
| - | avconv -i dvd.mpg -vcodec libx264 -profile:v high -level 41 -preset medium -crf 23 -tune film -acodec libfdk_aac video.mp4 | ||
| - | avconv -i dvd.mpg -vcodec libx264 -profile:v high -level 41 -preset medium -crf 23 -tune film -acodec libfdk_aac video.mkv | ||
| - | </code> | ||
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