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Improve section 3.2 of the faq by providing more useful examples and a

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simple batch script to rename images to a numerical sequence.

Patch by John Van Sickle printf("%s.%s@%s.com", john, vansickle, gmail).

Originally committed as revision 21330 to svn://svn.ffmpeg.org/ffmpeg/trunk
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John Van Sickle 2010-01-19 22:05:02 +00:00 committed by Stefano Sabatini
parent 731c04ad65
commit 49f6402236
1 changed files with 19 additions and 0 deletions
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doc/faq.texi
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@ -138,6 +138,25 @@ Notice that @samp{%d} is replaced by the image number.
@file{img%03d.jpg} means the sequence @file{img001.jpg}, @file{img002.jpg}, etc...
If you have large number of pictures to rename, you can use the
following command to ease the burden. The command, using the bourne
shell syntax, symbolically links all files in the current directory
that match @code{*jpg} to the @file{/tmp} directory in the sequence of
@file{img001.jpg}, @file{img002.jpg} and so on.
@example
x=1; for i in *jpg; do counter=$(printf %03d $x); ln "$i" /tmp/img"$counter".jpg; x=$(($x+1)); done
@end example
If you want to sequence them by oldest modified first, substitute
@code{$(ls -r -t *jpg)} in place of @code{*jpg}.
Then run:
@example
ffmpeg -f image2 -i /tmp/img%03d.jpg /tmp/a.mpg
@end example
The same logic is used for any image format that ffmpeg reads.
@section How do I encode movie to single pictures?