[FFmpeg-cvslog] avconv: allow no input files.

[Anton Khirnov]

ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sun Aug  5 08:37:43 2012 +0200| [ab2960970171ce3c988405f99a517b9a2fd6496e] | committer: Anton Khirnov

avconv: allow no input files.

It is now possible to use lavfi sources.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ab2960970171ce3c988405f99a517b9a2fd6496e
---

 avconv.c        |    5 -----
 doc/avconv.texi |    8 ++++++++
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/avconv.c b/avconv.c
index 2566a92..2bc9d82 100644
--- a/avconv.c
+++ b/avconv.c
@@ -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 776a326..ff5bb52 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:
+ at example
+avconv -filter_complex 'color=red' -t 5 out.mkv
+ at end example
 @end table
 @c man end OPTIONS