[FFmpeg-cvslog] r17955 - trunk/doc/ffmpeg-doc.texi
stefano
subversion
Sat Mar 14 11:18:19 CET 2009
Author: stefano
Date: Sat Mar 14 11:18:18 2009
New Revision: 17955
Log:
Add an example showing how to create a video from many images.
Modified:
trunk/doc/ffmpeg-doc.texi
Modified: trunk/doc/ffmpeg-doc.texi
==============================================================================
--- trunk/doc/ffmpeg-doc.texi Sat Mar 14 00:36:38 2009 (r17954)
+++ trunk/doc/ffmpeg-doc.texi Sat Mar 14 11:18:18 2009 (r17955)
@@ -141,8 +141,9 @@ to get the desired audio language.
NOTE: To see the supported input formats, use @code{ffmpeg -formats}.
-* You can extract images from a video:
+* You can extract images from a video, or create a video from many images:
+For extracting images from a video:
@example
ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
@end example
@@ -151,15 +152,20 @@ This will extract one video frame per se
output them in files named @file{foo-001.jpeg}, @file{foo-002.jpeg},
etc. Images will be rescaled to fit the new WxH values.
+If you want to extract just a limited number of frames, you can use the
+above command in combination with the -vframes or -t option, or in
+combination with -ss to start extracting from a certain point in time.
+
+For creating a video from many images:
+ at example
+ffmpeg -f image2 -i foo-%03d.jpeg -r 12 -s WxH foo.avi
+ at end example
+
The syntax @code{foo-%03d.jpeg} specifies to use a decimal number
composed of three digits padded with zeroes to express the sequence
number. It is the same syntax supported by the C printf function, but
only formats accepting a normal integer are suitable.
-If you want to extract just a limited number of frames, you can use the
-above command in combination with the -vframes or -t option, or in
-combination with -ss to start extracting from a certain point in time.
-
* You can put many streams of the same type in the output:
@example
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