FFmpeg - Encode AVC - Revision history

Dex at 13:48, 14 March 2026

2026-03-14T13:48:30Z

← Older revision		Revision as of 13:48, 14 March 2026
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			= FFmpeg – Encode AVC (H.264) Using CRF =
	[[Category:FFmpeg]]		[[Category:FFmpeg]]
	[[Category:AVC]]		[[Category:AVC]]
	~~Use this rate control mode if you want~~ to ~~keep the best quality and care less about the file size~~. ~~This~~ is the recommended ~~rate control~~ mode for most ~~uses~~.~~<br/>~~
	~~This method allows~~ the encoder ~~to attempt to achieve a certain output quality for~~ the ~~whole file when~~ output ~~file size is of less importance. The downside is that~~ you ~~can't~~ tell it ~~to get a specific filesize or not go over a specific size or~~ bitrate~~, which means that this method is not recommended for encoding videos for streaming~~.~~<br/>~~		== Summary ==
	The ~~range of the~~ CRF scale ~~is 0–51, where~~ 0 ~~is lossless. Consider 17 or 18~~ to ~~be visually lossless or nearly so; it should look the same or nearly the same as the input but it isn't technically lossless~~.~~<br/>~~		This article explains how to encode H.264/AVC video using CRF (Constant Rate Factor) with FFmpeg. CRF is the recommended rate‑control mode for most workflows because it prioritises consistent visual quality over exact file size.
	~~A preset is a collection of options that will provide a certain encoding~~ speed to compression ratio. ~~A slower preset will provide better compression (compression is quality per filesize).<br/>~~
			== What CRF Is ==
			CRF is a quality‑targeted encoding mode. Instead of telling the encoder how big the output must be, you tell it what quality level you want, and the encoder decides the bitrate dynamically across the entire video.

			== CRF Scale Explained ==
			The CRF scale ranges from 0 to 51.

			== Presets ==
			Presets determine the speed/compression ratio balance.

			== Example Command ==
	<pre>		<pre>
	ffmpeg -i <input.file> -c:v libx264 -crf 23 -preset veryslow <output.file>		ffmpeg -i input.file -c:v libx264 -crf 23 -preset veryslow output.file
	</pre>		</pre>
	~~Reference: [[~~https://trac.ffmpeg.org/wiki/Encode/H.264 ~~FFmpeg: H.264 Video Encoding Guide]]~~
			== References ==
			* https://trac.ffmpeg.org/wiki/Encode/H.264

Knowledgebaseadmin: Knowledgebaseadmin moved page FFmpeg - AVC to FFmpeg - Encode AVC

2025-03-06T14:18:31Z

Knowledgebaseadmin moved page FFmpeg - AVC to FFmpeg - Encode AVC

← Older revision		Revision as of 14:18, 6 March 2025
(No difference)

Knowledgebaseadmin at 13:44, 6 March 2025

2025-03-06T13:44:47Z

← Older revision		Revision as of 13:44, 6 March 2025
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			[[Category:FFmpeg]]
			[[Category:AVC]]
	Use this rate control mode if you want to keep the best quality and care less about the file size. This is the recommended rate control mode for most uses.<br/>		Use this rate control mode if you want to keep the best quality and care less about the file size. This is the recommended rate control mode for most uses.<br/>
	This method allows the encoder to attempt to achieve a certain output quality for the whole file when output file size is of less importance. The downside is that you can't tell it to get a specific filesize or not go over a specific size or bitrate, which means that this method is not recommended for encoding videos for streaming.<br/>		This method allows the encoder to attempt to achieve a certain output quality for the whole file when output file size is of less importance. The downside is that you can't tell it to get a specific filesize or not go over a specific size or bitrate, which means that this method is not recommended for encoding videos for streaming.<br/>

Knowledgebaseadmin: Created page with "Use this rate control mode if you want to keep the best quality and care less about the file size. This is the recommended rate control mode for most uses.
This method allows the encoder to attempt to achieve a certain output quality for the whole file when output file size is of less importance. The downside is that you can't tell it to get a specific filesize or not go over a specific size or bitrate, which means that this method is not recommended for encoding vi..."

2025-03-06T13:44:18Z

Created page with "Use this rate control mode if you want to keep the best quality and care less about the file size. This is the recommended rate control mode for most uses. This method allows the encoder to attempt to achieve a certain output quality for the whole file when output file size is of less importance. The downside is that you can't tell it to get a specific filesize or not go over a specific size or bitrate, which means that this method is not recommended for encoding vi..."

New page

Use this rate control mode if you want to keep the best quality and care less about the file size. This is the recommended rate control mode for most uses. 
This method allows the encoder to attempt to achieve a certain output quality for the whole file when output file size is of less importance. The downside is that you can't tell it to get a specific filesize or not go over a specific size or bitrate, which means that this method is not recommended for encoding videos for streaming. 
The range of the CRF scale is 0–51, where 0 is lossless. Consider 17 or 18 to be visually lossless or nearly so; it should look the same or nearly the same as the input but it isn't technically lossless. 
A preset is a collection of options that will provide a certain encoding speed to compression ratio. A slower preset will provide better compression (compression is quality per filesize). 
<pre>
ffmpeg -i <input.file> -c:v libx264 -crf 23 -preset veryslow <output.file>
</pre>
Reference: [[https://trac.ffmpeg.org/wiki/Encode/H.264 FFmpeg: H.264 Video Encoding Guide]]