avconv – audio and video processing tools

In March 2011 some of the FFmpeg developers forked the project under the name “Libav”.

Libav is a complete, cross-platform solution to record, convert and stream audio and video. It includes libavcodec – the leading audio/video codec library. One of the components of libav is avconv, a fast open source video and audio converter that can also grab from a live audio/video source. The command-line tool can also convert between arbitrary sample rates and resize video on the fly with a high quality polyphase filter.

Besides avconv, the libav-tools package offers the avplay multimedia player, the avserver streaming server, and the avprobe stream analyzer. The tooks support most existing file formats (AVI, MPEG, OGG, Matroska, ASF…) and encoding formats (MPEG, DivX, MPEG4, AC3, DV…).

Features include:

  • Grabs video and audio.
  • Can also grab the X11 display.
  • Convert from one audio and video format to another format in real time.
  • Streams several formats at several bit rates and resolutions simultaneously.
  • Handles thousands of concurrent users.
  • Uses the HTTP protocol to be compatible with all major players including Icecast (aka mpg123, xmms, winamp), MTV (to play streaming MPEG video and audio), “Real” compatible players and Windows Media Player.
  • Allows time shifting of live streams.
  • One instance can stream from multiple live encoding sources and/or multiple static files.
  • avprobe tool.
  • VorbisComment writing for FLAC, Ogg FLAC and Ogg Speex files.
  • Video filters: blackframe, bloxblur, copy, crop, cropdetect, delogo, drawbox, drawtext, fade, fieldorder, fifo, format, frei0r, gradfun, hflip, hqdn3d, lut, lutrgb, lutyuv, negate, null, ocv, overlay, pad, pixdesctest, scale, select, setdar, setpts, setsar, settb, showinfo, slicify, transpose, unsharp, vflip, and yadif.
  • Picks the “best” stream of each type present in input files and add them to each output file.

Website: libav.org
Support: GitHub Code Repository
Developer: Libav developers
License: GNU LGPL v2.1 or higher

avconv

avconv is written in C. Learn C with our recommended free books and free tutorials.

Return to Video Home Page | Return to Video Converters Home Page

Read our complete collection of recommended free and open source software. The collection covers all categories of software.

The software collection forms part of our series of informative articles for Linux enthusiasts. There's tons of in-depth reviews, alternatives to Google, fun things to try, hardware, free programming books and tutorials, and much more.
Share this article

Share your Thoughts

This site uses Akismet to reduce spam. Learn how your comment data is processed.