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Diffstat (limited to 'doc/ffmpeg.texi')
| -rw-r--r-- | doc/ffmpeg.texi | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 905e5f31a3..2908ad8a71 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -965,6 +965,9 @@ the matching type. Output link labels are referred to with @option{-map}. Unlabeled outputs are added to the first output file. +Note that with this option it is possible to use only lavfi sources without +normal input files. + For example, to overlay an image over video @example ffmpeg -i video.mkv -i image.png -filter_complex '[0:v][1:v]overlay[out]' -map @@ -987,6 +990,11 @@ graph will be added to the output file automatically, so we can simply write @example ffmpeg -i video.mkv -i image.png -filter_complex 'overlay' out.mkv @end example + +To generate 5 seconds of pure red video using lavfi @code{color} source: +@example +ffmpeg -filter_complex 'color=red' -t 5 out.mkv +@end example @end table As a special exception, you can use a bitmap subtitle stream as input: it |