欢迎来到FFmpeg Bug Tracker和Wiki

This Wiki is intended for all kinds of FFmpeg and multimedia related information. Everyone is welcome to add to, edit and improve it!

Bug Reports List of Bug Reports List of Tasks non developers can help with Please read the ​Bug Tracker Manual and Submitting a Bug Report before filing a new report. You must register before you can file a report or edit this wiki. For uploading samples > 2.5MB, either use the ​VideoLAN File Uploader or the FTP on Submitting a Bug Report (there is no hard filesize limit).

FFmpeg Official Documentation Documentation – FFmpeg’s main documentation page Submit an FFmpeg Logo – Instructions on how to submit a themed logo or banner to FFmpeg Developer Documentation Development Policies and Guides Guide for Using Git Notes on Maintaining FFmpeg Source Code and Being a Maintainer FATE – Our Continuous Integration Platform / regression testing system Cleanup – A list of components that may be considered candidates for removal Debugging Macroblocks and Motion Vectors How to conduct merges from Libav FFmpeg-related Sponsoring Programs Google Summer of Code GSoC 2019 GSoC 2018 GSoC 2017 GSoC 2016 GSoC 2015 GSoC 2014 Outreachy Outreachy - Dec 2016 Outreachy - May 2016 Outreachy - May 2015 OPW - Dec 2014 FFmpeg Developer Meetings FFmeeting/2016-05 FFmeeting/2015-09 FFmeeting/2014-10 FFmeeting/2014-01 FFmpeg at Conferences Conferences Schedule Community Contributed Documentation The guides below have been written by users and for users to supplement the official FFmpeg Documentation. If you’re confused about something refer to the official documentation and if you’re still having problems we can help.

Compiling FFmpeg Generic Compilation Guide FFmpeg Compilation Guides – Windows, macOS, Linux, and other platforms Compile Benchmarks Encoding Video Codecs: FFV1 Cheat Sheet H.264 Encoding Guide H.265 Encoding Guide VP9 (WebM) Encoding Guide AV1 Encoding Guide Legacy Codecs: Xvid / DivX / MPEG-4 Encoding Guide VP8 (WebM) Encoding Guide Theora Video and Vorbis Audio Encoding Guide Audio Codecs: AAC Encoding Guide MP3 Encoding Guide General encoding guides: Guidelines for high quality audio encoding VFX Pipeline Encoding Guide How to encode videos for YouTube and other video sharing sites Hardware acceleration Hardware acceleration introduction with FFmpeg Grabbing / Capturing Capturing audio with FFmpeg and ALSA How to grab the desktop (screen) with FFmpeg How to capture a lightning (thunderbolt) with FFmpeg How to capture a webcam input Streaming Encoding for Streaming Sites such as twitch.tv, ustream.tv, YouTube Live, and other RTMP(E) streaming providers. Streaming Guide Streaming media with ffserver Filtering Filtering Guide, including syntax for filter options Fancy Filtering Examples Scaling (re-sizing) video Postprocessing – Postprocessing low-quality video with FFmpeg Stereoscopic – 3D movies with ffmpeg Null – Filter for testing decoding speed WaveformMonitor – Waveform Monitor in FFmpeg Vectorscope – Vectorscope in FFmpeg Histogram – Histogram in FFmpeg Afade audio filter curves illustrated Remap – Copies pixels from source frame to target frame based on mapping files/streams Audio Channel Manipulation – Upmix, downmix, split, and manipulate audio channels Audio Volume Manipulation – Change audio volume and perform normalization (peak, RMS, EBU R128) Images / Frames Create a video slideshow from images Create a thumbnail image every X seconds of the video How to take multiple screenshots to an image (tile, mosaic) Create a mosaic out of several input videos Create a Waveform Image from an Audio Stream Subtitles How to burn subtitles into the video How to convert other FFmpeg-supported subtitles to ASS format How to convert YouTube SBV to SRT Developing Programs Using the FFmpeg Libraries How to setup Eclipse IDE for FFmpeg development Using libav* – Instructions for how to integrate FFmpeg’s main libraries into your own custom programs Including FFmpeg headers in a C++ application ​List of FFmpeg API changes/compatibility test results ​Lei Xiaohua’s Simplest FFmpeg Demos Miscellaneous General command line usage: Solutions to some errors and messages Creating multiple outputs from the same input How to concatenate, join, or merge media files How to use -map option to select exactly which streams to process Seeking to split a file or select a segment framemd5 Intro and HowTo for using per-frame checksums FFprobe Tips for getting frame rate, frame size, duration, etc. How to extract subtitles that are included within video files. Effects: How to speed up / slow down a video time lapse, etc. Video: Changing the frame rate Limiting the output bitrate Chroma Subsampling Debugging Macroblocks and Motion Vectors Why was the ffmpeg -sameq option removed? What to use instead? Viterbi Algorithm Audio: Audio Channel Manipulation – Upmix, downmix, split, and manipulate audio channels Audio Types – List of the different types of raw audio Audio Volume Manipulation – Change audio volume and perform normalization (peak, RMS, EBU R128) FFmpeg and the SoX Resampler – High quality audio resampling Working with other tools: How to encode with FFmpeg from Adobe Premiere Pro Using FFmpeg from PHP scripts Other: How to ask good questions on ffmpeg-user mailing list Articles for Creation – A simple idea/reminder list for new community contributed wiki articles Downstreams – A list of downstream software products that distribute FFmpeg, including versions and end-of-life dates Projects – A list of free projects and programs known to incorporate work from FFmpeg. About this Wiki License The materials within the Community Contributed Documentation section of the FFmpeg Wiki are released under the ​Creative Commons Attribution-ShareAlike 3.0 License. This allows anyone to share, adapt, and build upon this work, even for commercial purposes, as long as the same or compatible license is used and that credit is properly attributed to the author(s). Credit should be attributed to “Contributors to the FFmpeg Community Documentation Wiki”.

Wiki Page Index For a complete list of all local wiki pages, see TitleIndex.

Trac Documentation Trac is what FFmpeg uses for tracking bugs (and also hosts this wiki).

TracGuide – Built-in Documentation ​The Trac project – Trac Open Source Project ​Trac FAQ – Frequently Asked Questions TracSupport – Trac Support