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wm4
3b4682183c
To get guaranteed alignment for the chroma planes with typical YV12 playback, we have to double the alignment on the image width, as the chroma planes have half the image width. Clear the image with black instead of green to hide scaling artifacts on the right border of the screen. (It might be possible to create the image layout ourselves by not calling XvShmCreateImage(), and filling in our own image width and exact strides, but that's probably too risky: the Xv client library sends an X protocol request to query the real image dimension and strides. It is unknown to me whether X servers or drivers would generally accept an image with mismatching parameters, even if the image is conceptually valid.) Allocate the image with av_malloc() in the non-SHM case. I suspect the non-SHM case doesn't matter much, though.
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.