ffmpeg | branch: master | Mark Thompson <s...@jkqxz.net> | Sat Mar 23 16:18:49 2019 +0000| [963c4f85fe547ef51fafb66d7eceb3f5637d3843] | committer: Mark Thompson
doc/indevs: Add example using cropping to capture part of a plane > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=963c4f85fe547ef51fafb66d7eceb3f5637d3843 --- doc/indevs.texi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/doc/indevs.texi b/doc/indevs.texi index 1d5ed65773..89ba4fb406 100644 --- a/doc/indevs.texi +++ b/doc/indevs.texi @@ -910,6 +910,14 @@ Capture from CRTC ID 42 at 60fps, map the result to VAAPI, convert to NV12 and e ffmpeg -crtc_id 42 -framerate 60 -f kmsgrab -i - -vf 'hwmap=derive_device=vaapi,scale_vaapi=w=1920:h=1080:format=nv12' -c:v h264_vaapi output.mp4 @end example +@item +To capture only part of a plane the output can be cropped - this can be used to capture +a single window, as long as it has a known absolute position and size. For example, to +capture and encode the middle quarter of a 1920x1080 plane: +@example +ffmpeg -f kmsgrab -i - -vf 'hwmap=derive_device=vaapi,crop=960:540:480:270,scale_vaapi=960:540:nv12' -c:v h264_vaapi output.mp4 +@end example + @end itemize @section lavfi _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
