NAME
oggResize - resizes ogg files in multiple ways
SYNOPSIS
oggResize [options] inputfile.ogv outputfile.ogv
DESCRIPTION
oggResize can resize an ogg file (ogg, oga or ogv) in multiple ways: It
can change the video frame size, change datarate for the video and/or
audio streams contained in the ogg file and it can also change the
video frame rate or audio sample rate.
Additionally, since version 0.8 oggResize can add any ogg comment and
png‐pictures with an alpha channel can be rendered into the video at
any time period before and after the resizing process.
OPTIONS
-s Sets the size of the video frame. The size is given as
<width>x<height> The default size is 480x320.
Example: -s 320x240
-d Sets the datarate in byte per seconds for the video encoder
(theora). This meant to be a upper threshold. So the file may be
smaller than assumed. If not set, the datarate of the original
stream is used.
Example: -d 1024000
-D Sets the datarate in byte per seconds for the audio encoder
(vorbis). If not set, the datarate of the original stream is
used.
Example: -D 64000
-f Sets the frame rate of the video with numinator and demoninator
and is the pictures per second. If only one number is given, the
denominator is set to 1. If not set, the framerate of the
original video is used.
Example: -f 25:2
-F Sets the sample frequency (sample rate) of the audio data in
Hertz. If the sample frequency does not match the one with the
original file, resamling is invoked.
Example: -F 32000
-c Adds comments to the video (theora) stream. Comments are given
by a pair of type and value in the form ’type=value’. More than
one comment can be concatenated with a semicolon. It is
recommended to use apostrophes as the command line may use the
semicolon as a seperator.
Example: -c AUTHOR=yorn;DATE=03.07.09
-C Adds comments to the audio (vorbis) stream. Comments are given
by a pair of type and value in the form ’type=value’. More than
one comment can be concatenated with a semicolon. It is
recommended to use apostrophes as the command line may use the
semicolon as a seperator.
Example: -C AUTHOR=yorn;DATE=03.07.09
-q Specifies the quality for the resizing process. Values can be
chosen between 1 (best quality, with slight bluring) and 6
(worst quality). The default value is 2.
Example: -q1
-p This option is meant to help creating a preview of a film. The
number given with this option defines the number of frames, that
are omitted. E.g. if a film has 24 frames per second and -p24
is given, the newly created video shows the video 24 times
faster as only every 24th frame is used. This option can be
combined with the option -f to control the framerate. With both
options nice video previews can be created. If -p is used, the
audio stream is ignored.
Example: -p 24
-a Adds a picture to the video frame before it is resized. The
expression for the picture appearances:
<picture1.png>[,<startTime>[,<endTime>[,s]]]
default startTime is 0
default endTime is -1, which is the end of the stream duration
default s ist not set. If s is set, the picture slides in
smoothly.
More than one picture can be included. To concatenate the
expressions use the colon. If the appearance time overlap, the
pictures are placed on one another, so the last picture is the
uppest layer.
Example: -a etwas.png,2,7,s:etwasneues.png,5,10
-A Adds a picture to the video frame after it is resized.
The syntax follows the same expression as with option -a.
EXAMPLE
oggResize -s320x240 -d512000 orig.ogv new.ogv
Converts a the video orig.ogv to the video new.ogv with the new frame
size 320x240. If there was an audio stream within the orig.ogv file, it
is copied into the new file.
oggResize -D64000 -F16000 -N1 orig.ogv new.ogv
Converts only the audio stream of file orig.ogv to a sample rate of
16kHz, a datarate of 64 kBit/s and a mono channel. The video stream is
copied as is.
oggResize -s300x200 -D32000 -d1024000 -A
etwas.png,2,7,s:etwasneues.png,5,10 orig.ogv new.ogv
Converts the audio and video stream and adds the alpha channel picture
etwas.png to the video from second 2 to second 7 with a smooth fade in
and fade out. Additionally the alpha channel picture etwasneues.png is
placed on top of the video frame from second 5 to second 10 without any
fading.
AUTHOR
Joern Seger <yorn at gmx dot net>
SEE ALSO
oggCut(1), oggCat(1), oggJoin(1), oggSplit(1), oggSlideshow(1),
oggThumb(1), oggSilence(1)