diff options
| -rw-r--r-- | avconv.c | 5 | ||||
| -rw-r--r-- | doc/avconv.texi | 8 |
2 files changed, 8 insertions, 5 deletions
@@ -2431,11 +2431,6 @@ int main(int argc, char **argv) exit_program(1); } - if (nb_input_files == 0) { - av_log(NULL, AV_LOG_FATAL, "At least one input file must be specified\n"); - exit_program(1); - } - ti = getutime(); if (transcode() < 0) exit_program(1); diff --git a/doc/avconv.texi b/doc/avconv.texi index 776a326369..ff5bb5297c 100644 --- a/doc/avconv.texi +++ b/doc/avconv.texi @@ -805,6 +805,9 @@ 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 avconv -i video.mkv -i image.png -filter_complex '[0:v][1:v]overlay[out]' -map @@ -827,6 +830,11 @@ graph will be added to the output file automatically, so we can simply write @example avconv -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 +avconv -filter_complex 'color=red' -t 5 out.mkv +@end example @end table @c man end OPTIONS |