X264 presets. AMD VCE: AMD's hardware encoder, suitable for AMD GPU users. You can optionally use -tune to change settings based upon the specifics of your input. * - are differing x264 automatically lowers this when using psy-rd and/or psy-trellis to compensate for it increasing the quality of luma, and subsequently decreasing the quality of chroma. Current tunings include: film, animation, grain, stillimage, psnr, ssim, fastdecode, zerolatency. With x264 (and x265) the preset controls that tradeoff. com/wiki/X264_Settings，同时 x264有個很方便的編碼參數─preset，它可以幫助我們快速設定x264編碼時所用的眾多參數。 依照編碼速度的不同，preset由快到慢可以分為：ultrafast、superfast、veryfast、faster、fast、medium、slow、slower、veryslow、placebo這9個等級，原則上愈慢則會有更好的壓縮效果或是畫質。 x264预设类参数详解 x264版本——x264 core:116 r2074 2641b9e 加上“fullhelp”参数可以查看x264的完全版帮助——x264 --fullhelp 其中对预设类参数的说明是——Presets: --profile <string> Force th Here are your answers: There's no real advantage by using -preset placebo rather than -preset veryslow; you gain a little more space but it takes way longer to encode. This presentation goes through that analysis for choosing an x264 preset. This document may be of interest to companies analyzing usefulness of tuning/elaboration of their own codecs and also for users of x264 codec. 264 video encoded using x264 software. The latter is a placebo option that's really, really slow, and seldom yields better results, so only use it if you don't care about encode time. CRF18 with the normal preset will yield much better quality than very slow with CRF26. 264 profile, x264 preset, and the optimal size for the video buffer verifier FFmpeg parameters and quality settings for x264 video encoding x264 Presets and Tunes x264 Presets x264 exposes a preset and tune system. x264's interlaced encoding is inherently less efficient than its progressive encoding, so it is probably better to deinterlace an interlaced source before encoding rather than use interlaced mode. Valid presets are ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, and placebo. FFmpeg developer superdump has implemented x264 presets to FFmpeg. It’s excerpted from my upcoming pre-conference session at Streaming Media West entitled Introduction to ABR Technologies. Encoder Presets (x264): When using x264, you'll encounter presets like ultrafast, superfast, veryfast, fast, medium, slow, slower, veryslow. 本文详细解析了x264编码器中preset参数的10个等级，从ultrafast到placebo，涵盖了编码速度与压缩效率之间的权衡。 每个等级调整了lookahead长度、参考帧数量、宏块划分模式、运动搜索方法等多项关键设置。 x264中preset等级有10个，表示编码速度的快慢。 So me being a noob to streaming and broadcast software I had a quick question about the presets. Unless you have specialised requirements, deviating from the presets without in-depth knowledge about the way x264 and x265 works isn't recommended. mp4 [libx264 @ 0000000002a9a5c0] 264 - core 140 r2377 1ca7bb9 - 鉴于x264的参数众多，各种参数的配合复杂，为了使用者方便，x264建议如无特别需要可使用preset和 tune 设置。 这套开发者推荐的参数较为合理，可在此基础上在调整一些具体参数以符合自己需要，手动设定的参数会覆盖preset和tune里的参数。 Enable interlaced encoding. Frame-type options: g <integer> Reference links: Youtube recommended streaming encoder settings x264 fullhelp x264 settings basic wiki Another x264 settings basic wiki Presets comparison table Explanation of x264 tunes Basic output settings: Rate control: CBR Keyframe It offers good quality with minimal CPU load. If you need help compiling and installing see one of our compiling guides. 二、X264的preset和tune 鉴于x264的参数众多，各种参数的配合复杂， 为了使用者方便，x264建议如无特别需要可使用preset和tune设置。 这套开发者推荐的参数较为合理，可在此基础上在调整一些具体参数以符合自己需要，手动设定的参数会覆盖preset和tune里的参数。 Hi all, Downmix your Surround Sound to Stereo before using this “Pre-encoding” guide I have decided to make available my x264 presets for VidCoder that have taken me so long to come up with, but which will 99. These are the average VMAF scores. Hardware Encoders Before we get to presets, you need to understand the core choice: x264 (software encoding) versus hardware encoding (NVENC for NVIDIA, AMF for AMD). Referenz für die x264-Kommandozeile ¶ Wir sprechen in diesem Kapitel nahezu sämtliche Parameter von x264 kurz an. For the great majority of users, the Transcoder quality and Background transcoding x264 presets should be left at their default values. x264enc This element encodes raw video into H264 compressed data, also otherwise known as MPEG-4 AVC (Advanced Video Codec). 264 files, including choosing an H. Jan 18, 2025 · Master encoding presets for optimal speed-quality balance. In the faster moving Forza Horizon 4 benchmark, Turing’s NVENC does outperform x264 veryfast in some areas, NVENC again probably has slightly worse blocking but veryfast really struggles with moving fine detail. for Sync or Optimisation jobs. In addition to the encoder, selecting the appropriate preset can help balance quality and performance. Red backgrounds indicate the worst scores while green indicate the best. Legend The default preset is medium, which is what the other presets are compared against. - baseline: --no-8x8dct --bframes 0 --no-cabac --cqm flat --weightp 0 No interlaced. AviUtlの出力プラグイン「x264guiEx」の設定項目について紹介します。※初心者向けなので、それ以外の人には無価値なページです前ページ：【AviUtl】x264guiExの導入方法と使い方 (2/3)【MP4出力】基本的な使い方「良く Presets: x264 oferece presets (ultra-fast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, placebo). ) must remain the same. --preset veryfast x264 has a set of presets to switch between faster encoding, or higher quality. But when I am trying it with my video then preset veryfast provides the best compression in my case. The FFmpeg wiki says that the best compression rate is by preset "veryslow". and a bunch of x264 code/settings iv found online and tested with Basically i want super clean/well as clean as i can streaming 1080p 60 with as little pixelation as possible. Will changing the preset to a slower setting affect the upload or viewers download at all? I feel like my computer could handle the slow settings but I am worried that it might cause skipping or lag Video 1 shows a quality comparison of AV1 video encoded on an NVIDIA Ada Lovelace architecture GPU versus H. 9% do away with all your transcoding issues 🙂 There are many Handbrake/VidCoder presets and settings sprinkled throughout the Plex forums and the internet for that matter. If your ffmpeg supports -preset then any text file presets should not be used, and FFmpeg no longer comes with any other than some non-standard iPod presets. Quanto mais lento o preset, maior a qualidade e mais pesado para a CPU. There’s generally very little reason to change those, except for expert users. It is a common misconception that text presets can simply be copied from anywhere and used with any ffmpeg. 264 video is encoded using medium presets at 30 Mbps, while the AV1 video is encoded at 18 Mbps using the high-performance presets. There are two rate control modes that are usually suggested for general use: Constant Rate Factor (CRF) or The beauty of x264 and x265 is they come with recommended presets, which contain a whole set of settings. No x264 is a free software library and application for encoding video streams into the H. If you are unsure or your content doesn’t really fit into one of the following tunes, you can simply leave this option at “None”. The following is See comparisons between all the different FFmpeg encoding presets with x264, see output file sizes and the time taken to encode. The preset determines compression options and efficiency and therefore affects encoding speed and size. 264 profile Overrides all settings. Changing the "Background transcoding x264 preset" shouldn't have any impact on real-time/active transcodes, which is what I presume is going on when you mention you've got 4 going on at once. From ffmpeg's H264 guide: “A preset is a collection of options that will provide a certain encoding speed to compression ratio. See the default values, changes and flags for each preset, and how they affect quality and speed. Wenn wir noch überhaupt nicht mit x264 vertraut sind, sollten wir besser im Kapitel zur x264-Konfiguration einsteigen, wo das Zusammenspiel der Optionen bei einem konkreten Encoding erklärt wird. This guide maps most of libx264's options to FFmpeg's options along with detailed descriptions by x264 developer Dark_Shikari. Strong and weak spots of x264 in terms of encoding speed and video quality are found and recommendations on use of codec’s presets are given. This will similarly be the case if this target bitrate is to obtained in multiple (2 or 3) pass encoding Presets, CRF values, and bitrate strategies shape the final product. This article shows you how. If I run a sample command it shows the currently used presets $ ffmpeg -i infile. The presets are added to x264 encoder by developers to help you determine what filesize you want. ultrafast to fast: Less CPU usage, but lower quality per bitrate. x264, 1920x1080, 60fps, veryfast preset, high-detail low-motion scene: 2500kbps vs 3500kbps 3500kbps vs 6000kbps x264, 1920x1080, 60fps, veryfast preset, high-motion scene: 2500kbps vs 3500kbps 3500kbps vs 6000kbps As before with the preset test, these tests were performed with the exact same source video and preset, only the bitrate has changed. This article covers multiple advanced topics surrounding encoding H. Comments and corrections are welcome if you can figure out how to contact me. x264 Presets and Tunes x264 Presets x264 exposes a preset and tune system. This tells x264 that we’re providing it with a y4m file. In case of Constant Bitrate Encoding (actually ABR), the bitrate will determine the quality of the encoding. HandBrake’s faster General Presets produce smaller files with average quality, while its high quality General Presets produce larger files that take longer to encode. Which is better? Can we add modifyers to improve them further? Results for VMAF MS-SSIM and PSNR included! Choose a preset. The full list of presets, from fastest to slowest, is: ultrafast superfast veryfast faster fast medium slow slower GitHub Gist: instantly share code, notes, and snippets. 本文详细解析了x264编码器中preset参数的10个等级，从ultrafast到placebo，涵盖了编码速度与压缩效率之间的权衡。 每个等级调整了lookahead长度、参考帧数量、宏块划分模式、运动搜索方法等多项关键设置。 x264中preset等级有10个，表示编码速度的快慢。 Understanding the Encoder Options: x264 vs. All codecs and encoding tools have a configuration option that controls the quality/encoding time tradeoff. The exact numbers vary with content, but here are solid starting points: Presets influence encoding speed and quality. Compare x264, x265, and AV1 presets for different use cases. This means you can expect much larger file sizes. Placebo - Extremely slow encoding but provides the best Quality and/or filesize for a given source. This document analyzes the x264 video codec using various preset configurations and objective metrics to evaluate quality and speed tradeoffs. Presets range from: UltraFast - Very high speed encoding, but requires much higher bit-rates to maintain quality. 264/MPEG-4 AVC compression format, and is released under the terms of the GNU GPL. With this level of motion, NVENC is approximately equal to x264’s “faster” preset. So, I put this little table together to work as a reference. . Use the slowest preset you have patience for, with a crf that is acceptable, given that preset. 264 encoders. For all encodes, if you don’t set your own –ref option and instead use the default or a preset, x264 will automatically lower –ref if the –level you set conflicts with it. Here is my first x264 guide, it's a short guide about what settings I recommend you tweak to get optimal quality and speed and how to test and compare x264中所有的preset和tune： preset按照顺序从左到右逐渐变慢。 x264的 help ()中对preset的说明： tune是x264中重要性仅次于preset的选项，它是视觉优化的参数，tune可以理解为视频偏好（或者视频类型），tune不是一个单一的参数，而是由一组参数构成。 x264 --preset placebo --tune psnr -o <output> <input> Constant bitrate at 1000kbps with a 2 second-buffer: x264 --vbv-bufsize 2000 --bitrate 1000 -o <output> <input> Presets: --profile <string> Force the limits of an H. Since x264 doesn't write all of the encoding settings (that we can see), this may not be 100% accurate. To choose the optimal x264 preset, you have to balance encoding and distribution costs. As the text below the setting says, this controls the transcoding preset when transcoding in the background - i. I used mediainfo to read the x264 encoding options from the video. /dev/beandog Encoding presets for x264 x264 is well documented, and I like using it, but sometimes I want to see all the flags that a preset is using, compared to the defaults. You can see a list of current presets with -preset help (see example below), and what settings they apply with x264 --fullhelp. project357. You can find his guide here. This guide focuses on the encoder x264. 264 video compression. It assumes you have ffmpeg compiled with --enable-libx264. X264 CLI のロングヘルプに記載されたオプションの解説です。事細かに解説します。 x264 preset reference x264 Settings x264 Encoding Suggestions Authoring a professional Blu-ray Disc with x264 0解释x264命令可选项的用途和使用方法。同执行 x264 --fullhelp 显示顺序。本文主要翻译：mewiki. The x264 tune options assign some additional options which will optimize the encoder for certain types of content. For x264, presets like veryfast or faster provide a good trade-off between CPU usage and video quality. from what i've read here, very fast is comparable to the quick sync encoder. Even developers don't recommend using it. Encoding Presets for x264 MediaInfo used to read x264 encoding options from video files for reference. The quality of both videos is comparable. The H. This matches up with the --y4m flag that we gave to the vspipe command. x264: This is OBS’s default encoder and uses your CPU to encode the video. x264 has two motion estimation algorithms worth using, umh and tesa. The Very Fast Preset starts with a faster video encoder preset (x264 veryfast) and quality RF 24. 忽略 placebo 因为它会比 veryslow 浪费更多时间而且效果差异太小。 而越慢的 Preset 其 Reference frame (ref) 值也越高，例如 veryslow preset 的 ref 为 16。 由于通常不需这么高的 ref，你可以透过指定一个 Level 来限制 ref，或是手动指定一个合理的 ref 值 (1 ~ 6)。 x264 tune The default x264 preset chooses adequate compatibility for Blu-ray players but it is now possible to choose more complex conversion settings while simply maintaining compatibility by explicitly enabling Blu-ray compatibility mode. Using a slower x264 preset allows for better compression and slightly better quality at the same CRF. The pass property controls the type of encoding. Best OBS settings for 2026: platform-safe presets for Twitch, YouTube, Facebook, and Dacast—bitrate, encoder, keyframes, OBS Studio 32, and troubleshooting. x264 on slow, in the past, has also produced x264 presets Fast Medium Slow and VerySlow. The default is medium. Comece com "veryfast" ou "faster" para a maioria dos sistemas. It compares presets using convex hulls and analyzes option values across different presets. mp4 outfile. For example, x264 lists its options under libx264 AVOptions in the full help output. e. For X264, slower presets generally yield better quality per bit, while for X265, mid-to-slow presets strike a balance between speed and efficiency. Compare the encoding options of different x264 presets for h. See HWAccelIntrofor information on supported hardware H. What just curious which x264 preset you guys are using in Handbrake? i am running an i7-4790, so the slow or slower setting is doable but i would like to use fast, faster or very fast if the quality isn't a huge leap backward. The analysis aims to identify the best presets and settings for a range of use cases and content types by evaluating rate-distortion curves and the densities of I want to create an FFmpeg preset file. When double-pass encoding, you can only change the preset; all other parameters (codecs, sizes, speeds, etc. wrc4tx, laode1, 28gpby, burccz, ja0a, byex, ejpj8, eexh, vuew4, scum,