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ogmcat - Online in the Cloud

Run ogmcat in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command ogmcat that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


ogmcat - Concatenate several OGG/OGM files into one big OGG/OGM file

SYNOPSIS


ogmcat [options] -o outname inname1 [inname2 [inname3 ...]]

DESCRIPTION


ogmcat does NOT work at the moment. It is work in progress. I included it just out of
laziness (otherwise I'd have to remove it from the Makefile/configure stuff prior to
releasing this version).

ogmcat can be used to concatenate several OGG/OGM files into one big file if they are of
the same type. For a more in-depth description refer to the LIMITATIONS section.

-o, --output outname
Output to 'outname'.

inname1
Use 'inname1', 'inname2' etc as the sources.

-m, --manualsync n
Specifies a manual sync value in ms that will be added to each stream's
presentation timestamps along with the value calculated by the chosen sync
algorithm (see the -s option). This option can be used for each input file although
it has no effect if used for the first one as well.

-s, --sync nr
Uses sync mode nr. Valid values are 0 - 4. The default value is shown on ogmcat's
help screen.

-n, --nosafetychecks
Disable the safety checks made prior to the concatenating. The resulting file may
be unplayable. See the LIMITATIONS section for further details.

-v, --verbose
Be verbose and show each OGG packet. Can be used twice to increase verbosity.

-h, --help
Show this help.

-V, --version
Show version information.

LIMITATIONS


Concatenating streams is difficult at the best and might even be impossible. Therefore
ogmcat makes very strict comparisons between the streams contained in the input files. The
checks done include:

* general: All streams with the same serial number must be of the same type (video,
audio, Vorbis audio or text streams).

* general: If a stream exists in one file it must in the other files as well.

* video streams: The codec FourCC, width, height and FPS must match.

* Vorbis streams: The sample rate and the number of channels must match.

* other audio streams: The codec ID, sample rate, bits per sample and number of
channels must match.

* text/subtitle streams: The 'time unit' must match.

The user can forcefully override the last four checks with the -n parameter. The checks
marked as 'general' cannot be overridden this way.

Audio/video synchronization might not be ok in the resulting file even if the source files
were perfectly in sync. The user can experiment with the -s parameter which causes ogmcat
to use slightly different algorithms for calculating the granulepos values for the audio
and text streams. The range of valid parameters will be printed on ogmcat's help screen.

If none of the synchronization algorithms provided works correctly then the user can also
manually add a synchronization offset using the -m option for each input file.

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