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Now PulseAudio is preferred over ALSA, which in turn is preferred over OSS. This should give best results on all systems. On systems with PulseAudio, we will always use it natively, rather than through the suboptimal ALSA emulation (which the default ALSA output is normally redirected to when PulseAudio is active; ALSA hardware devices will not be, but to use those the user must set AO explicitly in any case, so changing the defaults makes no difference). The fallback from ao_pulse to ao_alsa causes no noticeable delay on systems without PulseAudio. On systems with ALSA, we won't attempt to use OSS anymore. Also, move OpenAL above SDL. OpenAL should generally work better than SDL.
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 - libfontconfig - 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.