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| -rw-r--r-- | doc/faq.texi | 19 |
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diff --git a/doc/faq.texi b/doc/faq.texi index 79134427df..9d81a30d30 100644 --- a/doc/faq.texi +++ b/doc/faq.texi @@ -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? |