wm4
d5ad9a8f60
demux_lavf probes up to 2 MB of data in the worst case. When the ffmpeg demuxer is actually opened, the stream is seeked back to 0, and the previously read data is thrown away. This wasn't a problem for playback of local files, but it's less than ideal for playing from slow media (like web streams), and breaks completely if the media is not seekable (pipes, some web streams). This new function is intended to allow fixing this. demux_lavf will use it to put the read probe data back into the buffer. The simplest way of implementing this function is by making it transparently extend the normal stream buffer. This makes sure no existing code is broken by new weird special cases. For simplicity and to avoid possible performance loss due to extra dereferencing when accessing the buffer, we just extend the static buffer from 8 KB to 2 MB. Normally, most of these 2 MB will stay uncommitted, so there's no associated waste of memory. If demux_lavf really reads all 2 MB, the memory will be committed and stay unused, though.
mpv
Overview
mpv is a movie player based on MPlayer and mplayer2. It supports a wide variety of video file formats, audio and video codecs, and subtitle types.
If you are wondering what's different from mplayer2 and MPlayer you can read more about the changes.
Compilation
Compiling with full features requires development files for several
external libraries. Below is a list of some important requirements. For
more information see the output of ./configure --help for a list of options,
or look at the list of enabled and disabled features printed after running
./configure. If you think you have support for some feature installed
but configure fails to detect it, the file config.log may contain
information about the reasons for the failure.
Essential dependencies (incomplete list):
- gcc or clang
- X development headers (xlib, X extensions, libvdpau, libGL, libXv, ...)
- Audio output development headers (libasound, pulseaudio)
- fribidi, freetype, fontconfig development headers (for libass)
- libass
- FFmpeg libraries (libavutil libavcodec libavformat libswscale libpostproc)
- libjpeg
- libquvi if you want to play Youtube videos directly
- libx264 if you want to use encoding (has to be explicitly enabled when compiling ffmpeg)
Most of the above libraries are available in suitable versions on normal Linux distributions. However FFmpeg is an exception (distro versions may be too old to work at all or work well). For that reason you may want to use the separately available build wrapper (mpv-build) that first compiles FFmpeg libraries and libass, and then compiles the player statically linked against those.
If you are running Mac OSX and using homebrew we provide homebrew-mpv, an up to date formula that compiles mpv with sensible dependencies and defaults for OSX.
Bug reports
Please use the issue tracker provided by GitHub to send us bug reports or feature requests.
Contributing
For small changes you can just send us pull requests through GitHub. For bigger changes come and talk to us on IRC before you start working on them. It will make code review easier for both parties later on.
Contacts
You can find us on IRC in #mpv-player on irc.freenode.net