Subject: [PATCH] lavf/img2dec: add start_number_range option

[PATCH] lavf/img2dec: add start_number_range option

---
 doc/demuxers.texi     |    8 ++++++--
 libavformat/img2dec.c |   14 +++++++-------
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/doc/demuxers.texi b/doc/demuxers.texi
index 8abcdf1..aecdd4d 100644
--- a/doc/demuxers.texi
+++ b/doc/demuxers.texi
 <at>  <at>  -50,8 +50,8  <at>  <at>  specified in the pattern with the string "%%".
 If the sequence pattern contains "%d" or "%0 <at> var{N}d", the first filename of
 the file list specified by the pattern must contain a number
 inclusively contained between  <at> var{start_number} and
- <at> var{start_number}+4, and all the following numbers must be
-sequential.
+ <at> var{start_number}+ <at> var{start_number_range}-1, and all the following
+numbers must be sequential.

 The pattern may contain a suffix which is used to automatically
 determine the format of the images contained in the files.
 <at>  <at>  -77,6 +77,10  <at>  <at>  format is guessed from the first image file in the sequence.
  <at> item start_number
 Set the index of the file matched by the image file pattern to start
 to read from. Default value is 0.
+ <at> item start_number_range
+Set the index interval range to check when looking for the first image
+file in the sequence, starting from  <at> var{start_number}. Default value
+is 5.
  <at> item video_size
 Set the video size of the images to read. If not specified the video