Commit ab296097 authored by Anton Khirnov's avatar Anton Khirnov

avconv: allow no input files.

It is now possible to use lavfi sources.
parent a5fd7c60
......@@ -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);
......
......@@ -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
......
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