Normally, video/audio/sub track selection is persistent across files
played in the same mplayer instance. This is wanted, because settings
should not be reset across files in general. However, if the track
layout of a file is completely different from the previous, this will
essentially select random tracks. In this case, keeping the track
selection is confusing and unwanted.
Reset the track selection to default if the track layout changes. The
track layout is determined by number of tracks, track order, default
flag, whether the track is an external subtitle, and track language.
If a track layout change is detected when playing a new file, the -sid,
-aid and -vid options are reset to "auto".
This behavior is enabled only if the user selects tracks manually (via
keybinds and the "switch_audio" slave properties etc.). If no user
interactions take place, options specified on the command line will
follow the old behavior.
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.
Libraries specific to particular video output methods
(you'll want at least one of VDPAU, GL or Xv):
- libvdpau (for VDPAU output, best choice for NVIDIA cards)
- libGL (OpenGL output)
- libXv (XVideo output)
general:
- libasound (ALSA audio output)
- various general X development libraries
- libfreetype (for libass)
- libfontconfig (for libass)
- libass
- FFmpeg libraries (libavutil libavcodec libavformat libswscale libpostproc)
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 that first compiles FFmpeg libraries
and libass, and then compiles the player statically linked against those.
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