Notice that @samp{%d} is replaced by the image number.
-@file{img%03d.jpg} means the sequence @file{img001.jpg}, @file{img002.jpg}, etc...
+@file{img%03d.jpg} means the sequence @file{img001.jpg}, @file{img002.jpg}, etc.
+
+Use the @option{-start_number} option to declare a starting number for
+the sequence. This is useful if your sequence does not start with
+@file{img001.jpg} but is still in a numerical order. The following
+example will start with @file{img100.jpg}:
+
+@example
+ ffmpeg -f image2 -start_number 100 -i img%d.jpg /tmp/a.mpg
+@end example
If you have large number of pictures to rename, you can use the
following command to ease the burden. The command, using the bourne
The same logic is used for any image format that ffmpeg reads.
+You can also use @command{cat} to pipe images to ffmpeg:
+
+@example
+ cat *.jpg | ffmpeg -f image2pipe -c:v mjpeg -i - output.mpg
+@end example
+
@section How do I encode movie to single pictures?
Use: