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Linshizhi
ffmpeg.wasm-core
Commits
2e798c6c
Commit
2e798c6c
authored
Sep 24, 2013
by
Clément Bœsch
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doc/faq: remove indent in examples.
CSS should take care of this.
parent
eafb9c52
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doc/faq.texi
View file @
2e798c6c
...
...
@@ -105,7 +105,7 @@ For example, img1.jpg, img2.jpg, img3.jpg,...
Then you may run:
@example
ffmpeg -f image2 -i img
%d.jpg /tmp/a.mpg
ffmpeg -f image2 -i img
%d.jpg /tmp/a.mpg
@end example
Notice that @samp
{
%d} is replaced by the image number.
...
...
@@ -118,7 +118,7 @@ the sequence. This is useful if your sequence does not start with
example will start with @file
{
img100.jpg
}
:
@example
ffmpeg -f image2 -start
_
number 100 -i img
%d.jpg /tmp/a.mpg
ffmpeg -f image2 -start
_
number 100 -i img
%d.jpg /tmp/a.mpg
@end example
If you have large number of pictures to rename, you can use the
...
...
@@ -128,7 +128,7 @@ 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 $x); ln -s "$i" /tmp/img"$counter".jpg; x=$(($x+1)); done
x=1; for i in *jpg; do counter=
$
(
printf
%03d $x); ln -s "$i" /tmp/img"$counter".jpg; x=$(($x+1)); done
@end example
If you want to sequence them by oldest modified first, substitute
...
...
@@ -137,7 +137,7 @@ If you want to sequence them by oldest modified first, substitute
Then run:
@example
ffmpeg -f image2 -i /tmp/img
%03d.jpg /tmp/a.mpg
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.
...
...
@@ -145,7 +145,7 @@ The same logic is used for any image format that ffmpeg reads.
You can also use @command
{
cat
}
to pipe images to ffmpeg:
@example
cat *.jpg | ffmpeg -f image2pipe -c:v mjpeg -i - output.mpg
cat *.jpg | ffmpeg -f image2pipe -c:v mjpeg -i - output.mpg
@end example
@section How do I encode movie to single pictures?
...
...
@@ -153,7 +153,7 @@ You can also use @command{cat} to pipe images to ffmpeg:
Use:
@example
ffmpeg -i movie.mpg movie
%d.jpg
ffmpeg -i movie.mpg movie
%d.jpg
@end example
The @file
{
movie.mpg
}
used as input will be converted to
...
...
@@ -169,7 +169,7 @@ to force the encoding.
Applying that to the previous example:
@example
ffmpeg -i movie.mpg -f image2 -c:v mjpeg menu
%d.jpg
ffmpeg -i movie.mpg -f image2 -c:v mjpeg menu
%d.jpg
@end example
Beware that there is no "jpeg" codec. Use "mjpeg" instead.
...
...
@@ -227,11 +227,11 @@ then you may use any file that DirectShow can read as input.
Just create an "input.avs" text file with this single line ...
@example
DirectShowSource("C:
\path
to your file
\yourfile
.asf")
DirectShowSource("C:
\path
to your file
\yourfile
.asf")
@end example
... and then feed that text file to ffmpeg:
@example
ffmpeg -i input.avs
ffmpeg -i input.avs
@end example
For ANY other help on AviSynth, please visit the
...
...
@@ -497,7 +497,7 @@ An easy way to get the full list of required libraries in dependency order
is to use @code
{
pkg
-
config
}
.
@example
c
99
-
o program program.c
$
(pkg-config --cflags --libs libavformat libavcodec)
c
99
-
o program program.c
$
(pkg-config --cflags --libs libavformat libavcodec)
@end example
See @file
{
doc/example/Makefile
}
and @file
{
doc/example/pc-uninstalled
}
for
...
...
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