NAME¶
oggTranscode - transcodes ogg files in multiple ways
SYNOPSIS¶
oggTranscode [options] inputfile.ogv outputfile.ogv
DESCRIPTION¶
oggTranscode 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
oggTranscode 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.
oggTranscode was previously called
oggResize.
OPTIONS¶
- -s
- Sets the size of the video frame. The size is given as
<width>x<height>. At default, the video frame size
keeps the same.
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¶
oggTranscode -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.
oggTranscode -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.
oggTranscode -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)