========

 ffmpeg

========

.. contents::

   :local:

Docs

====

https://ffmpeg.org/documentation.html

  Docs index.

http://ffmpeg.org/ffmpeg-all.html

  Common options.

https://ffmpeg.org/faq.html

  FAQ.

https://ffmpeg.org/ffmpeg.html

  Syntax overview.

Print supported options

=======================

Supported formats::

  ffmpeg -formats

Supported decoders/encoders::

  ffmpeg -codecs

  ffmpeg -encoders

  ffmpeg -decoders

Details for particular encoder/decoder::

  ffmpeg -h decoder=h264

  ffmpeg -h encoder=libx264

Supported muxer/demuxer::

  ffmpeg -muxers

  ffmpeg -demuxers

Details for particular muxer/demuxer::

  ffmpeg -h muxer=webm

  ffmpeg -h demuxer=flv

Available filters::

  ffmpeg -filters

Details for particular filter::

  ffmpeg -h filter=aecho

  ffmpeg -h filter=blackdetect

Pixel formats::

  ffmpeg -pix_fmts

Supported bitstream filters::

  ffmpeg -bsfs

Layouts for audio (mono/stereo/etc)::

  ffmpeg -layouts

Available protocols::

  ffmpeg -protocols

Probe file

==========

::

   mediainfo $FILE

   ffprobe $FILE

Limiting bit rate

=================

``-maxrate`` should be accompanied with ``-bufsize`` option like::

  -maxrate 800k -bufsize 1200k

otherwise you'll get warning:

> VBV maxrate specified, but no bufsize, ignored

``-b:v RATE`` allows to specify average bitrate for video.

To specify video stream use syntax like::

  -c:v:0 libx264 -b:v:0 2000k -maxrate:v:0 2200k -bufsize:v:0 3000k

https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate

  Limiting the output bitrate.

https://trac.ffmpeg.org/wiki/EncodingForStreamingSites

  Encoding for streaming sites.

H.264

=====

https://trac.ffmpeg.org/wiki/Encode/H.264

Adding a logo to a video

========================

::

  ffmpeg -i in.mp4 -i logo.png out.mp4

  ffmpeg -i in.mp4 -i logo.png -filter_complex "overlay=x=10:y=20" out.mp4