avconv has been discontinued. Similar apps include HandBrake, which is free and open source. Other options are File Converter, Shutter Encoder, XMedia Recode and Freemake Video Converter. Video Converters like avconv are a crowded field, with more than 50 alternatives for Windows, Mac, Linux, the web and Android.
Convert videos between all the popular media formats at high speed and quality, share on YouTube and Facebook, and extract audio with ease. Choose the standard version or step up to Pro for added DVD burning and ripping power.
Canada
Converts videos from internet, camcorders, or capture cards to over 1000 mainstream formats like MP4 and MKV, offering lossless quality, fast processing, device compatibility including 3D, and customizable settings for optimal playback, sharing, or compression.
Hong Kong SAR China
Introducing ffMediaMaster A Comprehensive Media Tool for Windows.
Xilisoft Video Converter is easy, fast, reliable, and loaded with features. Its capable of converting videos of all popular formats like AVI, MPEG, WMV, DivX, MP4, H.264/AVC, AVCHD, MKV, RM, MOV, XviD, 3GP, and audio MP3, WMA, WAV, RA, M4A, AAC, AC3, OGG.
FFMPEG Audio Encoder is a very power audio encoder. It executes ffmpeg.exe, qaac64.exe, and fdk-aac.exe to process audio files.
United States
Russia
OggConvert is a small Gnome utility that uses GStreamer to convert media files to the licence-free Theora, Dirac and Vorbis formats.
United Kingdom
FF Multi Converter is a simple graphical application which enables you to convert audio, video, image and document files
Greece
EU
FFQueue is (yet another) graphical user interface for FFMpeg with comprehensive support for both the basic features but also the more advanced features like filtergraphs.
DenmarkEU
Subler is a Mac OS X application that opens media containers, allows you to add or remove media tracks inside them, and then saves them out again. In the specialized language of the video world, Subler is a “transcoder” or “demuxer” depending on how you use it.
Australia
iFlicks is the best and most complete video and metadata handling solution available for macOS. There is no easier way to add you video files to iTunes or Plex, so you can watch them on your iOS devices or third party media players.
GermanyEU
