Table of Contents
What is x264 preset?
The x264 preset controls the quality and throughput for your encodings. Here’s a quick analysis to determine if you’re using the optimal preset. This presentation is adopted from my upcoming Streaming Media West pre- conference session, Introduction to ABR Technologies (bit.ly/SMW_2019).
What x264 CPU preset should I use?
The video encoder, x264, has a number of “presets” that will change your video quality and CPU usage accordingly. The OBS default is veryfast, which for the majority of cases is the best balance between CPU usage and video quality. Slower presets will use more computations for quality, but will use much more CPU.
Is x264 very fast good?
x264 FASTER has the highest overall score, followed by Medium, Slow and Very Fast. Performance impact from FASTER to MEDIUM is up to 50% slower encoding; quality difference is < 1-5%. MEDIUM to SLOW: up to 35% slower encoding; quality difference is < 1-2%….
VMAF Score | Perception |
---|---|
< 66 | Forget about it |
What bitrate is x264?
6,500 Kbps
If you are using x264 Encoder: Bitrate: Max 6,500 Kbps if you are a non-partnered Twitch streamer. This is dependent on your internet and quality you want to stream at. Keyframe Interval: 2. CPU Usage Preset: For games with high movement (FPS, Sports games, etc.), choose Fast to VeryFast.
What is x264 and x265?
x264 is the most established open-source software encoder for H. 264/AVC. x265 is an open-source HEVC encoder, originally ported from the x264 codebase. Concurrent to HEVC, Google developed VP9 as a royalty-free video compression format and released libvpx as an open-source software library for encoding VP9.
Is x264 better than NVENC new?
NVENC or x264 In basic terms: the slower the preset, the harder your CPU has to work. On Turing-based NVIDIA GeForce GPUs (ex: RTX 20-Series and GTX 1660/Ti), NVENC produces an image quality comparable to the x264 medium preset. Older Pascal and Kepler GPUs produce an image comparable to x264 veryfast.
What are the different CPU presets for x264?
x264 has several CPU presets, in increasing order from low CPU usage to high CPU usage: ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, placebo. By “preset”, it means exactly what it sounds like: a set of pre-determined settings for x264 so that you don’t have to set them all manually yourself to tweak things.
What are the presets of the x264 encoder?
There are two primary components to the x264 encoder we’ll be looking at: presets and bitrate. Presets. x264 has several CPU presets, in increasing order from low CPU usage to high CPU usage: ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, placebo.
What’s the difference between FFmpeg and x264 presets?
FFmpeg preset is the value in which speed the media encode will traverse at, At the slower spectrum you get more quality at the sacrifice of time, more quicker and you get larger file sizes. In this part 1 of FFmpeg encoding comparisons I look at x264 presets, their speed and output file size.
What are the VMAF scores for x264 presets?
The VMAF scores for x264 presets are the exact opposite to what most people expect. Fast comes out as the winner, followed by Medium, then Slow and finally VerySlow. In other resolutions and games it may not be exactly like this. Different resolutions see different rankings between the presets. But that is a graph for another day. Stay tuned!