Rudolf Polzer
3ef58d85ba
This yields generally smaller files, by avoiding upscaling at all times. This method may or may not be useful for iOS, needs testing there. Note: this uses three instances of vf_scale: 1. Scale to target dimensions, ONLY if both are <= original video dimensions. 2. Failing that, scale to width*<calculated height by display aspect>, ONLY if <calculated height by display aspect> <= original video height. 3. Failing that, scale to <calculated width by display aspect>*height. When the test before failed, we KNOW that <calculated width by display aspect> <= original video width. So basically, only one of the three scalers should ever be active, as the last two scalers only can ever have an effect if the aspect ratio mismatches the video. As for danger of roundoff errors: If scaler 1 succeeded, we have won. Scalers 2 and 3 will never do anything, because display resolution == video resolution. Here it is crucial that no rounding of video size to display size takes place; in other words, the target display size already MUST be even, which it is because we pass 2 to the rounding parameter of the dsize filter. Scaler 2 and 3 are obviously mutually exclusive, as they depend on opposite aspect ratio conditions. We later should put this functionality directly into vf_scale...
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 `issues 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`` .. _changes: https://github.com/mpv-player/mpv/blob/master/DOCS/man/en/changes.rst .. _mpv-build: https://github.com/mpv-player/mpv-build .. _homebrew-mpv: https://github.com/mpv-player/homebrew-mpv .. _issues tracker: https://github.com/mpv-player/mpv/issues