The default compression setting is 7, which is hopefully a good balance
between speed of compression, and resulting file sizes. The maximum png
compression will be very slow even on fast computers. On the other hand,
the lowest compression setting produces files of several MB size with
normal video resolutions, which should be avoided as well.
The screenshot image file type can now be selected with the
--screenshot-filetype option. The --screenshot-jpeg-quality option
controls the compression setting of the written JPEG image file.
Adding these flags improves the quality of the YUV->RGB conversion when
screenshots are taken. It trades precision for performance.
This doesn't affect any other swscale uses, such as vf_scale or vo_x11.
Based on a patch by cantabile. Fixes#140.
The screenshot command normally converts the currently displayed video
frame to an image. Add support for an alternative screenshot mode
that is supposed to capture the real window contents. Such a
screenshot contains a possibly scaled version of the frame, the OSD,
and subtitles.
Add a default key binding Alt+s for taking screenshots in this mode.
This needs special VO support, and might not work with all VOs (this
commit does not yet contain an implementation for any VO, only the
infrastructure).
Add a VO command (VOCTRL_SCREENSHOT) which requests a screenshot
directly from the VO. If VO support is available, screenshots will be
taken instantly (no more 1 or 2 frames delay). Taking screenshots when
hardware decoding is in use will also work (vdpau). Additionally, the
screenshots will now use the same colorspace as the video display.
Change the central MPContext to be allocated with talloc so that it
can be used as a talloc parent context.
This commit does not yet implement the functionality for any VO (added
in subsequent commits).
The old screenshot video filter is not needed anymore if VO support is
present, and in that case will not be used even if it is present in
the filter chain. If VO support is not available then the filter is
used like before. Note that the filter still has some of the old
problems, such as delaying the screenshot by at least 1 frame.
wm4