Author: dmeyer
Date: Mon Nov 6 10:26:33 2006
New Revision: 1979
Modified:
trunk/popcorn/src/backends/mplayer/player.py
Log:
add some doc to think about scaling
Modified: trunk/popcorn/src/backends/mplayer/player.py
==============================================================================
--- trunk/popcorn/src/backends/mplayer/player.py (original)
+++ trunk/popcorn/src/backends/mplayer/player.py Mon Nov 6 10:26:33 2006
@@ -375,6 +375,30 @@
if 'outbuf' in self._mp_info['video_filters']:
filters += ["outbuf=%s:yv12" % self._frame_shmkey]
+ # OK, this filter list is only correct when having a 4:3 output window
+ # If we play 4:3 content on 16:9 screen we have three choices (examples
+ # on 800x450 display and a 4:3 content.
+ #
+ # 1. change aspect to force 16:9
+ # scale=800:450,expand=800:450,dsize=800:450
+ # 2. cut of top/bottom
+ # scale=800:-2,crop=800:450:0:75,expand=800:450,dsize=800:450
+ # 3. blank bars left and right
+ # scale=-2:450,expand=800:450,dsize=800:450
+ #
+ # Or maybe a mix of these ideas. On the other hand, 4:3 and 16:9
content
+ # on a 16:9 screen plays fine with
+ # scale=800:-2,expand=800:600,dsize=800:600
+ #
+ # This means we need a) the window size before playing a resize is not
+ # allowed and b) the size and aspect of the video itself before mplayer
+ # plays it. So we need either mplayer to test play it or use
kaa.meatadata
+ # to get this information.
+ #
+ # A second problem could be that the aspect of the window is not the
aspect
+ # of the monitor, e.g. a 800x600 window on a 16:9 should always keep
the
+ # aspect of the monitor and not the window.
+ #
filters += ["scale=%d:-2" % self._size[0], "expand=%d:%d" % self._size,
"dsize=%d:%d" % self._size ]
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