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author | Stefano Sabatini <stefasab@gmail.com> | 2012-12-15 18:06:01 +0400 |
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committer | Stefano Sabatini <stefasab@gmail.com> | 2012-12-22 19:15:13 +0400 |
commit | 35b97ad7c09ed3c9553985bbbc2d27705cd1db78 (patch) | |
tree | 4ea0d223b8d2bc7595ccbfa0c0b197b6d7c363da /doc | |
parent | bde1e8bf069a31c86a6a2687a3df88b100302477 (diff) |
doc/filters: rework and itemize examples for the overlay filter
Diffstat (limited to 'doc')
-rw-r--r-- | doc/filters.texi | 55 |
1 files changed, 39 insertions, 16 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index e5e24e9ee9..259a5e5efb 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -3214,34 +3214,57 @@ to pass the two inputs through a @var{setpts=PTS-STARTPTS} filter to have them begin in the same zero timestamp, as it does the example for the @var{movie} filter. -Follow some examples: +You can chain together more overlays but the efficiency of such +approach is yet to be tested. + +@subsection Examples + +@itemize +@item +Draw the overlay at 10 pixels from the bottom right corner of the main +video: @example -# draw the overlay at 10 pixels from the bottom right -# corner of the main video. overlay=main_w-overlay_w-10:main_h-overlay_h-10 +@end example + +Using named options the example above becomes: +@example +overlay=x=main_w-overlay_w-10:y=main_h-overlay_h-10 +@end example -# insert a transparent PNG logo in the bottom left corner of the input +@item +Insert a transparent PNG logo in the bottom left corner of the input, +using the @command{ffmpeg} tool with the @code{-filter_complex} option: +@example ffmpeg -i input -i logo -filter_complex 'overlay=10:main_h-overlay_h-10' output +@end example -# insert 2 different transparent PNG logos (second logo on bottom -# right corner): -ffmpeg -i input -i logo1 -i logo2 -filter_complex -'overlay=10:H-h-10,overlay=W-w-10:H-h-10' output +@item +Insert 2 different transparent PNG logos (second logo on bottom +right corner) using the @command{ffmpeg} tool: +@example +ffmpeg -i input -i logo1 -i logo2 -filter_complex 'overlay=10:H-h-10,overlay=W-w-10:H-h-10' output +@end example -# add a transparent color layer on top of the main video, -# WxH specifies the size of the main input to the overlay filter +@item +Add a transparent color layer on top of the main video, WxH specifies +the size of the main input to the overlay filter: +@example color=red@@.3:WxH [over]; [in][over] overlay [out] +@end example -# play an original video and a filtered version (here with the deshake filter) -# side by side +@item +Play an original video and a filtered version (here with the deshake +filter) side by side using the @command{ffplay} tool: +@example ffplay input.avi -vf 'split[a][b]; [a]pad=iw*2:ih[src]; [b]deshake[filt]; [src][filt]overlay=w' +@end example -# the previous example is the same as: +The above command is the same as: +@example ffplay input.avi -vf 'split[b], pad=iw*2[src], [b]deshake, [src]overlay=w' @end example - -You can chain together more overlays but the efficiency of such -approach is yet to be tested. +@end itemize @section pad |