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For cases with dual stack (IPv4 + IPv6) connectivity, but where one stack potentially is less reliable, strive to trying to connect over both protocols in parallel, using whichever address connected first. In cases with a hostname resolving to multiple IPv4 and IPv6 addresses, the current connection mechanism would try all addresses in the order returned by getaddrinfo (with all IPv6 addresses ordered before the IPv4 addresses normally). If connection attempts to the IPv6 addresses return quickly with an error, this was no problem, but if they were unsuccessful leading up to timeouts, the connection process would have to wait for timeouts on all IPv6 target addresses before attempting any IPv4 address. Similar to what RFC 8305 suggests, reorder the list of addresses to try connecting to, interleaving address families. After starting one connection attempt, start another one in parallel after a small delay (200 ms as suggested by the RFC). For cases with unreliable IPv6 but reliable IPv4, this should make connection attempts work as reliably as with plain IPv4, with only an extra 200 ms of connection delay. Signed-off-by: Martin Storsjö <martin@martin.st>
Libav
Libav is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides a mean to alter decoded Audio and Video through chain of filters.libavdeviceprovides an abstraction to access capture and playback devices.libavresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- avconv is a command line toolbox to manipulate, convert and stream multimedia content.
- avplay is a minimalistic multimedia player.
- avprobe is a simple analisys tool to inspect multimedia content.
- Additional small tools such as
aviocat,ismindexandqt-faststart.
Documentation
The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Examples
Conding examples are available in the doc/example directory.
License
Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.