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Amend documentation for the image2 demuxer, to better reflect the current behavior.

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Signed-off-by: Mans Rullgard <mans@mansr.com>
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Stefano Sabatini 2011-01-21 13:54:14 +01:00 committed by Mans Rullgard
parent db2ddd3885
commit 10ed96c78f
1 changed files with 13 additions and 8 deletions
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21
doc/demuxers.texi
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@ -24,20 +24,18 @@ Image file demuxer.
This demuxer reads from a list of image files specified by a pattern. This demuxer reads from a list of image files specified by a pattern.
The filename of each file to read must contain a sequential number, The pattern may contain the string "%d" or "%0@var{N}d", which
which specifies the position of the file in the sequence. specifies the position of the characters representing a sequential
The pattern must contain the string "%d" or "%0@var{N}d", which
specifies the position of the characters representing the seqential
number in each filename matched by the pattern. If the form number in each filename matched by the pattern. If the form
"%d0@var{N}d" is used, the string representing the number in each "%d0@var{N}d" is used, the string representing the number in each
filename is 0-padded and @var{N} is the total number of 0-padded filename is 0-padded and @var{N} is the total number of 0-padded
digits representing the number. The literal character '%' can be digits representing the number. The literal character '%' can be
specified in the pattern with the string "%%". specified in the pattern with the string "%%".
The first filename of the file sequence specified by the pattern must If the pattern contains "%d" or "%0@var{N}d", the first filename of
contain a number inclusively contained between 0 and 4, all the the file list specified by the pattern must contain a number
following numbers must be sequential. inclusively contained between 0 and 4, all the following numbers must
be sequential. This limitation may be hopefully fixed.
The pattern may contain a suffix which is used to automatically The pattern may contain a suffix which is used to automatically
determine the format of the images contained in the files. determine the format of the images contained in the files.
@ -59,4 +57,11 @@ second:
ffmpeg -r 10 -f image2 -i 'img-%03d.jpeg' out.avi ffmpeg -r 10 -f image2 -i 'img-%03d.jpeg' out.avi
@end example @end example
Note that the pattern must not necessarily contain "%d" or
"%0@var{N}d", for example to convert a single image file
@file{img.jpeg} you can employ the command:
@example
ffmpeg -f image2 -i img.jpeg img.png
@end example
@c man end INPUT DEVICES @c man end INPUT DEVICES