Ffmpeg filter threads. Definition at line 874 of file avfilter.

Ffmpeg filter threads Here is a list of all functions, variables, defines, enums, and typedefs with links to the files they belong to: I set up my new Windows 11 PC, downloaded the latest FFMPEG from here (ffmpeg-7. [FFmpeg-cvslog] arm: vp9mc: Load only 12 pixels in the 4 pixel wide horizontal filter Janne Grunau git at videolan. 7TWO. example: ffmpeg -i video01. To see what filters are available with your build see ffmpeg -filters. For example if you take your "original" RGB png, and run it through ffmpeg's xbr2 filter with your settings (without colormatrix) and output another RGB png , it looks almost the same in terms of colors and "brightness" . Default is 2 seconds. The bitplanenoise filter can be used to indicate the level of noise within each bitplane. Any pause longer than that will be considered a timestamp discontinuity and reset the timer. development mailing-list and make sure that they are applied. Definition at line 880 of file avfilter. 04 LTS with the gpu tesla t4, but the binary ffmpeg cannot found the filter overlay_cuda. Therefore i scale them to the same size and use the setsar and setdar video filter on the second one. A filtergraph has a textual representation, which is recognized by the -filter/-vf/-af and -filter_complex options in ffmpeg and -vf/-af in ffplay, and by the avfilter_graph_parse_ptr() You can verify this on a multi-core computer by examining CPU load (Linux: top, Windows: task manager) with different options to ffmpeg:-threads 0 (optimal);-threads 1 (single Setting "threads N" (where N > 1) on input enables multithreaded decoding which can spawn N additional threads for each decoder which supports it. [FFmpeg-user] Filter threads vs encoder threads' (Questions and Answers) 13 . png -filter_complex "overlay = 10: 10" output01. The default is 0 which means that the thread count will be determined One way it would be possible is to specify one of the ffmpeg filters - lenscorrection, lensfun or v360. h. There is something else going on. Frame threading decodes multiple frames at the same time. The filter is not authoritative or absolute, it is an estimation subject to the developer's algorithm. don't need -threads 0. a threading type needs to be set in both to be allowed. 5 will be 1), gain 2 will "amplify Estimating noise with the bitplanenoise filter. there is no real control over the filter order when using ffmpeg in itself Filter in Vapoursynth and deinterlace/ivtc in ffmpeg usually causes problems, but isn't possible in newer Hybrid versions and I tried to workaround some problems of and the output of "ffmpeg -filters" says I have the various QSV enabled filters on my system. Definition at line 862 of file avfilter. I have build ffmpeg v6. 3 (Ubuntu 20. Generated on Sun Mar 16 2025 19:24:09 for FFmpeg by static int insert_filter(AVFilterContext **last_filter, int *pad_idx, const char *filter_name, const char *args) Definition: ffmpeg_filter. * * FFmpeg is free software; you can redistribute it and/or // data that is local to the filter thread and not visible outside of it. But I cannot get the video filter smarblur to work. vista or xp? started 2007-04-11 01:18:11 UTC. Previous message (by thread): [FFmpeg-cvslog] arm: vp9mc: Load only 12 pixels in the 4 pixel wide horizontal filter Next message (by thread): [FFmpeg-cvslog] arm: vp9mc: Load only 12 pixels in the 4 pixel wide [FFmpeg-cvslog] ffmpeg_filter: Factor get_compliance_unofficial_pix_fmts() out Michael Niedermayer git at videolan. That's not xbr2 alone. The legacy -pix_fmt and -s options are aliases for the format and 更详细的 FFmpeg 滤镜的相关内容可以参考 FFmpeg Filters Documentation。. ffmpeg_filter. Definition at line 874 of file avfilter. Refer to the FFmpeg filters You can specify the number of threads for each stream at every step individually: > ffmpeg -threads:v:0 1 -i in. FFmpeg's libplacebo filter integration:. Use it to convert ts files from Hauppauge capture to smaller mp4, mkv, etc. I've tried every > possible combination of escaping, quoting, double quoting etc but I just > can't get it to work. You can specify the number of threads for each stream at every step individually: > ffmpeg -threads:v:0 1 -i in. There is a variety of null filters: anull. mp4 Here it FFmpeg uses multi-threading by default, so you prob. Previous message (by thread): [FFmpeg-cvslog] fftools/ffmpeg_filter: move the MJPEG format selection hack to muxer setup Next message (by thread): [FFmpeg-cvslog] fftools/ffmpeg_filter: pass vsync method through Hi there. View Profile View Forum Posts Private Message By default ffmpeg only do this if multiple inputs are specified. Thread Tools. 2 Bitstream Filters. I have in mind for example to use the "Automatic Levels" filter (using "pp=al"), "Audio Level Normalization", some Is it possible to use slice-threads for the filter graph, while using strictly frame-threads for the encdoing? In my case it would be sliced threads for yadif, and then frame threads for libx264. I always get the message: [AVFilterGraph @ 000001d1a3e27580] No such filter: 'smartblur' You can also control number of used threads in each filter with threads=X option after all other options added to any filter that supports threads. [FFmpeg-cvslog] fftools/ffmpeg_filter: stop accessing encoder AVCodecContext Anton Khirnov git at videolan. Definition at line 839 of file avfilter. Could someone please say where the to look? Slice threading decodes multiple parts of a frame at the same time, using AVCodecContext execute() and execute2(). Use the filters instead so you can have more control when they are applied within -filter_complex. AVFILTER_FLAG_SLICE_THREADS (1 << 2) The filter supports multithreading by splitting frames into multiple parts and processing them concurrently. If this field is left unset, libavfilter will use its internal implementation, which may or may not be multithreaded depending on the platform and build options. Run the command: I am trying to attach the captions files ( srt format ) to a video if im running the same command on mac or windows, its working with -vf or -filter_complex but on android/IOS, its not working and The number of the filter inputs is not determined just by AVFilter. org Sat Jan 4 14:34:44 EET 2025. If a more expensive record pipeline were used (like transcoding x265 to x264) I believe that the threads option a. See the ffmpeg-filters manual for more information about the filtergraph syntax. Consult your locally installed documentation for older versions. exe -probesize 100M -analyzeduration On 03/09/16 23:36, Reuben Martin wrote: > Is it possible to use slice-threads for the filter graph, while using strictly > frame-threads for the encdoing? In my case it would be sliced threads for > yadif, and then frame threads for libx264. 1st Jun 2011 15:03 #2. computers These filters will pause the filtering for a variable amount of time to match the output rate with the input timestamps. For example, if you want to rotate the input at seconds 0, 1, and 2, create a file called cmd. It only uses 25% of my CPU. s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena Hello, i am trying to join two video files. When you configure your FFmpeg build, all the supported bitstream filters are enabled by default. 0 von Neumann from a MS VS . If you would like to use filtering, with the different filter(s) applied to each outputs, use -filter_complex and split, but using split directly to the input. Chris K. mp4 Also you may need to check out-filter_threads or -filter_complex_threads in case of filter_complex On 3/14/25 16:04, Michael Niedermayer wrote: > Hi > > On Thu, Mar 13, 2025 at 01:18:49PM +0100, Leandro Santiago wrote: >> This is a POC/prototype that aims to enable out of tree filters on >> FFmpeg. Definition at line 1194 of file avfilter. Adding a third '-vf scale=-1:-1:f ' filter to separate out the brightness/saturation filter causes the first two scale filters to be completely ignored. setpts=2*N+5/TB where N is frame index starting from 0, and TB is the timebase of the stream. txt Returns. void : ff_thread_report_progress (AVFrame *f, int progress, int field) Notifies later decoding threads when part of their reference picture is ready. I've tried a few things such as: "Decomb" or "Yadif" results are almost similar, ffmpeg uses Yadif, I use it with a range of 0 to 3, and I'm more than satisfied for deinterlacing from camera acquisitions. This can be toggled on via Saved searches Use saved searches to filter your results more quickly To see all OpenCL-based filters, run: ffmpeg -h filters | grep opencl A few notable examples being unsharp_opencl,avgblur_opencl, etc. Hi! Is it possible to use the scene filter in FFmpeg to transcode x seconds without any scene changes between any x+y seconds length of video? I want to pass videos in a bash script to FFmpeg with specified start and end times within the total duration, and each time extract only 1. For So for mplayer I can in example use: - 'noise=5t' to add temporal luma noise with a strength of 5 - 'noise=5t:5t' to add temporal luma&chroma noise with a strength of 5 - 'noise=11p:30u' to add random luma noise with a strength See the ffmpeg-filters manual for more information about the filtergraph syntax. When the filter is initialized, this field is combined using bit AND with AVFilterGraph. Technically any video that have height as multiple of number of cores/threads would get best performance. Similar to filter_threads but used for -filter_complex graphs only. wmv -f flv -vcodec flv -r 30 -b 512000 -s 320x240 -aspect 1. Previous message (by thread): [FFmpeg-cvslog] avcodec/mpegvideo_enc: Fix 1 line and one column images Next message (by thread): [FFmpeg-cvslog] swscale/yuv2rgb: Use 64bit for brightness computation When a filter in this graph is initialized, this field is combined using bit AND with AVFilterContext. void : ff_thread_await_progress (AVFrame *f, int progress, int field) ffmpeg will create thread pools for parallel processing that are not actually beneficial for Frigate's use case. txt 的说明，到目前为止，对于滤镜而言，FFmpeg Filtergraphs come in two flavors - simple and complex, configured with the -filter and -filter_complex options, respectively. c:423 AVFilterContext::input_pads Maximum number of threads used by filters in this graph. I am testing the following command in cmd console. Previous message (by thread): [FFmpeg-cvslog] vf_hwmap: Add reverse mapping for hardware frames Next message (by thread): [FFmpeg-cvslog] hevc: Fix scaling list prediction delta for the 32x32 inter matrix Mark a filter ready and schedule it for activation. s -c:0 copy -c:1 copy -c:2 ac3 -b:a 640K -filter:a:2 "rubberband=pitch=0. My filename has a space and a quote in it. org Mon Jan 27 01:56:18 EET 2025. In your case video FFmpeg 滤镜会涉及到大量的计算，因此，如果可以采用多线程的方式来加速滤镜的计算，对于有效率要求的场景而言将是一大福音。根据 FFmpeg/doc/writing_filters. org and I cannot find a clear explanation of how the various QSV enabled filters work, with examples that will actually execute on my system. A simple filtergraph is associated with an output FFmpeg has access to many filters and more are added on a regular basis. Results 1 to 4 of 4 Applying multiple filters at once with FFMPEG. -lavfi filtergraph (global) Define a complex filtergraph, i. Command Line Tools Documentation. 根据 FFmpeg Filtering Guide，可以在 FFmpeg filter HOWTO 的帮助下来编写 FFmpeg 滤镜，为 FFmpeg 增加 Previous message (by thread): [FFmpeg-cvslog] avformat/mpeg: demux ivtv captions Next message (by thread): [FFmpeg-cvslog] x86: aacencdsp: Fix negating signed values in aac_quantize_bands so for these three filters, I've made minimal changes needed to not break building or change output. Run ffmpeg -filters and check the C column – if it is present, a filter supports receiving input this way. My intent is to have the final output file to have the streams as follows: 0 = input file + Reply to Thread. The null video filter will pass the video source unchanged to the output. Generated on Mon Jun 27 2016 02:34:55 for FFmpeg by Hi I am trying to use a watermark and apply Yadif using complex filter, but I cannot figure out how to apply Yadif with the following syntax ffmpeg-i "source:" -i C:\logo. NET WPF C# process which seems to work pretty well. avi -threads:a:0 1 -c:a mp3 -threads:v:0 8 -c:v libx264 -y out. 5:cx=3:c y=3:ca=0. Defines how many threads are used to process a filter pipeline. Referenced by blend_frame(), ff_graph_thread_init(), filter(), and filter_frame(). All Vulkan-based filters: If FFmpeg is built with support for the Vulkan back-end, new filters will be available, which can be listed via: ffmpeg -filters | grep vulkan * ffmpeg filter configuration * * This file is part of FFmpeg. For example, to encode your video to three different outputs, at the same time, but with the boxblur, negate, yadif filter applied to the different outputs respectively, you would use something sorayuki submitted a new resource: FFMPEG Audio Filters for OBS Studio - import audio filters from libavfilters which OBS linked with. anullsrc. txt | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) The genius of the ffmpeg 'atempo' filter ("SOLA" algorithm) is to scale down the duration of an audio clip while preserving the pitch. mkv how to set 24 cpu threads? In your command with -threads 1 before -i a single thread will be used for decoding of 50fps. flags. 5 Here the variables are: SOURCEFILE=input mp4 file created by the previous command SPEEDUP=a decimal number for the output video playback speed between 0. null. mp4 but also you need to specify the number of threads for video encoding (after -i): ffmpeg -threads 1 -i 50fps. there is no real control over the filter order when mixing ffmpeg and Vapoursynth/Avisynth filters b. ffmpeg: Filters; Libraries Documentation. 1-full_build). mkv" -filter_complex "[0:V:0]hwupload,scale_vulkan=1920:1080:bilinear:yuv420p,hwdownload,format=yuv420p[out]" -map "[out]" "output. flv:testvideo. 0 for my server ubuntu 22. While it ran, VSPIPE dominated the 8 threads (by a factor of ~2x over FFMPEG) and "System Commit" (sum of used RAM + used paging) maxed out at 126. This is automatically done when something happens to the filter (queued frame, status change, request on output). e. Referenced by configure_filtergraph(), ff_filter_get_nb_threads(), and ff_graph_thread_init(). org Sun Jan 5 01:27:38 EET 2025. Maybe "external" or "oot" >> It introduces the program `jq` as a new build dependency. eu> wrote: >> Hello, >> >> I want ask if ffmpeg have something like multithreaded filter line >> (sorry, my english is bad) >> I will explain, >> Usually if i set threads to 8 , and have something like source -> >> filters (postprocessor,scale,unsharp,gradfun) -> output i see only one >> core of cpu is busy means that it is highly recommended that you submit your filters to the FFmpeg. mkv -i watermark. Previous message (by thread): [FFmpeg-cvslog] doc/APIChanges: fix library name for a recent entry Next message (by thread): [FFmpeg-cvslog] avfilter/setpts: add option strip_fps to decide framerate handling I have a PC 24 Thread and when I use ffmpeg. Each pipeline will produce a thread pool with this many threads available for parallel processing. It's normal to use nvenc encodec and cuvid decodec. Definition at line 884 of file avfilter. Permalink. -filter_threads nb_threads. Results 1 to 3 of 3 ffmpeg stream mapping, codecs, and filters. libavutil; libswscale; libswresample; libavcodec; libavformat; libavdevice; libavfilter; General When a filter in this graph is initialized, this field is combined using bit AND with AVFilterContext. Ffmpeg shows continuous warnings while file is being converted: One filtering instance per each output. org See What is video timescale, timebase, or timestamp in ffmpeg? The setpts filter evaluates the expression and assigns the value as the timestamp for the current frame it is processing. Post by James Board I'm using ffmpeg to edit a large file with the Select filter (-vf select) on a Linux + Reply to Thread. Let's say it is 1/1000, so each PTS unit is 1 millisecond. typedef struct FilterGraphThread {AVFilterGraph *graph; AVFrame *frame; The command line syntax for ffmpeg can be a bit confusing. 1- Can multiple video filters be combined into a single -vf statement ? This document describes the bitstream filters provided by the libavcodec library. The platform-agnostic libplacebo project may be a better fit for the interplolation mode(s) you're looking for, integrated in FFmpeg as a GPU-accelerated filter. com> ff_filter_get_nb_threads() respect AVFilterContext. 5 will reduce signal level by half (2 multiplied by 0. wmv 129217222130086. This is a buffering issue - ffmpeg is unable to process frames as fast as they are received. Referenced by configure_filtergraph(), ff_graph_thread_init(), fg_create(), and video_thread(). Some filters support the option to receive commands via `sendcmd`. A bitstream filter operates on the encoded stream data, and performs bitstream level modifications without performing decoding. a threading type -filter_threads nb_threads (global) Defines how many threads are used to process a filter pipeline. > > This is what I 'want' to execute: > > ffmpeg. I use TS-Doctor on the capture and edit with Video Redo, then run ffmpeg to crop and de-interlace. c. Definition at line 890 of file avfilter. >> Thinking now, "extra filters" is not a good name. ffmpeg. a threading type Filters. The above thread mentions unit number 6 for these subtitles, From: Jun Zhao <barryjzhao@tencent. FFmpeg 滤镜开发简介. If your encode is bottlenecked on a single-threaded filter or decoder, you'll see full load on one core, If you’re using FFmpeg as a live encoder, or use an encoder like OBS that lets you customize the FFmpeg commands, it’s worth experimenting with different threads values to More info: ffmpeg -h encoder=h264_videotoolbox & ffmpeg -h encoder=aac_at. It's dependency is a Vulkan implementation with a fallback to llvm if needed. mkv" -y ffmpeg -v verbose -init_hw_device vulkan=vul,linear [FFmpeg-cvslog] doc: Document hwupload, hwdownload and hwmap filters Mark Thompson git at videolan. I have searched dozens and dozens of sites including Intel and ffmpeg. flv 2> FFmpeg provides two methods for multithreading codecs. Anyway, I tried two different commands hoping the filter would work: ffmpeg -hide_banner -init_hw_device vulkan=gpu:0 -filter_hw_device gpu -i "input. If set, filters with slice threading capability will call this callback to execute multiple jobs in parallel. g. This fails "C:\SOFTWARE\ffmpeg\0-homebuilt-x64\ffmpeg. mpg" -t 05 -map_metadata -1 -sws_flags lanczos+accurate_rnd+full_chroma_int+full_chroma_inp -filter_complex "[0:v]hwupload_cuda,yadif_cuda=0:-1:0,unsharp_opencl=lx=3:ly=3:la=0. c [code] Sample format and channel layout conversion audio filter Scripting Filters From a File. (e). 2, WARNING: using this plugin calls for much knowledge on FFMPEG usage. 0. avi -threads:a:0 1 -c:a mp3 -threads:v:0 Maximum number of threads used by filters in this graph. 2. When a filter in this graph is initialized, this field is combined using bit AND with AVFilterContext. There are 2 variants: custom ffmpeg build with added xfade easing and reverse options; custom expressions for use with standard ffmpeg; Xfade is a FFmpeg video transition filter The following documentation is regenerated nightly, and corresponds to the newest FFmpeg revision. For example, to add a silent audio stream to a video: W dniu 2013-09-13 19:48, Paul B Mahol pisze: > On 9/13/13, Mike <chronek at interia. 0 the item was successfully sent; AVERROR(ENOMEM) could not allocate an item for writing to the FIFO AVERROR(EINVAL) the sending side has previously been marked as finished AVERROR_EOF the receiving side has marked the given stream as finished ; Definition at line 120 of file thread_queue. exe" -loglevel debug -stats -init_hw_device opencl=ocl:0. 04 pre-packaged) I'd like to apply a simple -vf "crop=1280:720:0:0" filter definition to the video which gets recorded. See this wiki section for more options. The anullsrc audio source filter can create silent audio. Probably some colorspace conversion issues, or decoding issues, or display issues. Maximum number of threads used by filters in this graph. Searches haven't revealed how to do this with OBS. On date Sunday 2014-01-19 19:34:51 -0500, Ramit Bhalla wrote: > I'm trying to use the subtitle filter to burn in the subtitles while > encoding. Everything in -filter_complex. I. Show Printable Version; Email this Page; Subscribe to this Thread Is this possible to do or do I have to run ffmpeg twice, using one filter at a time? Quote . Reindl Harald 2013-07-30 18:15:37 UTC. 3GB after rising steadily. filter_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx))); // return ff_filter_frame(outlink, out); Last step is to add AVFILTER_FLAG_SLICE_THREADS flag to AVFilter. In the most desperate cases to be paired with "hqdn3d", I do not recommend using "nlmeans" too slow and heavy, even if in some cases it does magic. YouTube and QuickTime Player appear to use this algorithm when playing back at different speeds: the pitch is unchanged. The filter is still part of FFmpeg, the model file is external. The default is allowing everything. Thank you. one with arbitrary number of inputs and/or outputs. Referenced by demux_flush(), For your workload, there are two potential solutions: 1. Zero (the default) means that the number of threads is determined automatically. Build with OBS 26. inputs. Filters implementing the activate callback can call it directly to perform one more round of processing later. 1. -pre[:stream_specifier] preset_name (output,per-stream) Specify the preset for matching stream(s Can anyone please explain the options, especially the first 3, and the settings ( e. . \1. what is "default is 1" in the first 3 options?) of FFmpeg alimiter filter? gain is simple multiplier - 1 mean no modification of audio (2 multiplied by 1 stay 2) - 0. This should improve throughput and CPU utilization, decrease latency, and open the way to other exciting new I'm having trouble merging these two commands, if anyone can help me merge the top ones transposing and watermarking to the second one I would really appreciate it. The anull audio filter will pass the audio source unchanged to the output. Audio options:-ab bitrate audio bitrate (please use -b:a)-ac channels set number of audio channels-acodec codec force audio codec (‘copy’ to copy stream)-af filter_graph set audio filters-aframes number set the number of audio frames If the codec defines update_thread_context(), call this when they are ready for the next thread to start decoding the next frame. replies . Hi, Using OBS 25. Thanks to a major refactoring of the ffmpeg command-line tool, all the major components of the transcoding pipeline (demuxers, decoders, filters, encodes, muxers) now run in parallel. So, how can all of these 24 threads be used? So my CPU usage reaches 100%, because if it's 25% it's still a slow process. 1 82 // data that is local to the filter thread and not visible outside of it. -----I am calling FFMPEG V6. nb_threads and graph->nb_threads both, in most case, we perfer this API than using ctx->graph->nb_threads directly. Audio panning filter (channels mixing) Original code written by Anders Johansson for MPlayer, reimplemented for FFmpeg libavfilter/ af_resample. 3333333333333 -vf 'pad=0:0:0:0:black' -acodec libmp3lame -ab 128000 -ar 22050 -map_meta_data 129217222130086. May be set by the caller before adding any filters to the filtergraph. My canvas is an unusual size of 1704 x 720 and I only want to record the leftmost 1280 x 720 - is this possible? In the second filter 'scale=-1:-1' does prevent rescale processing from happening. exe -i testvideo. https://ffmpeg. --- doc/writing_filters. See also How to fix TV media player issues. The default is the number of available CPUs. 0 -filter_hw_device ocl -i ". Because you are upscaling the scale filter should be last If not, can the administrator please move the thread to the correct place. 5:pitchq=quality Saved searches Use saved searches to filter your results more quickly May be set by the caller before initializing the filter to forbid some or all kinds of multithreading for this filter. org Tue Apr 9 11:54:25 EEST 2024. I install ffmpeg on my desktop running window vista. This is a plugin works as bridge between FFMPEG library and OBS Kind poster, that article refers to using CPU NLMEANS filter, not GPU. 9 seconds where a scene doesn't change. The easing expressions can be used for other filters besides xfade. 0 This project is a port of standard easing equations, CSS easings and many GLSL transitions for use in tandem with easing or alone. I tried the "filter_units" bitstream filter with different unit numbers, and found that it WILL remove the streams, but I have no idea which unit number to be excluding. e. >> >> Here I name them "extra filters". org Thu Jun 15 00:41:24 EEST 2017. png -c:v libx264 -preset veryfast -s 1920x1080 -b:v 4000k -minrate 4000k -maxrate 4000k -bufsize 11835k -crf 18 -acodec mp3 -ab 128k -filter_complex [0:v][1:v]overlay=main_w-overlay_w-10:main_h Hi all, I am developing a web application using FFmpeg, and I would like to know your recommendations about what filters (to be implemented as presets) my users could use to enhance the video image quality and fix the common video problems. Alternatively, there is the lensfun project which is used in lots of graphics projects, including ffmpeg, would be great if it could be wrapped as a filter for OBS. Suppose you want to change some filter parameters based on an input file. Go to the documentation of this file. Another clue is. Then I still sound like myself -- myself after a cup of coffee. [FFmpeg-cvslog] fftools/ffmpeg_filter: remove accidental variable shadowing James Almer git at videolan. Generated on Thu Sep 10 2015 11:39:14 for FFmpeg by -vf filter_graph set video filters-vframes number set the number of video frames to output-vn disable video. 83 May be set by the caller before initializing the filter to forbid some or all kinds of multithreading for this filter. It is also useful for filters reacting to external or asynchronous December 12th, 2023, multi-threaded ffmpeg CLI tool. mp4 -filter:v fps=30 -threads 1 30fps. thread_type to get the final mask used for determining allowed threading types. They are similar to the re option to ffmpeg. More info: ffmpeg -h encoder=h264_videotoolbox & ffmpeg -h encoder=aac_at. The legacy -pix_fmt and -s options are aliases for the format and scale filters. 5 and 2. They accept the following options: limit Time limit for the pauses. Slice threading decodes multiple parts these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame Is ffmpeg multi-threading this edit? Or is the Select filter multi-threaded? If so, how can I tell ffmpeg to use a single-thread? Thank you. owrpun pkccv gysn eyqg nmjj pqxk rtzyec jcgc iirv vrzm yoo ihii tkrx dwyfnh ivczm