Matrix Elements VB-800 Manual do Utilizador descarregar pdf (Página 33)

Chapter 3. Advanced streaming using the command line

channels=

This option allows to set the number of channels of the resulting audio stream. This is useful for codecs that don’t have

support for more than 2 channels, of to lower the bitrate of an audio stream.

scodec=

This options allows to specify subtitle format the subtitles tracks of the input stream should be converted to.

List of available codecs can be found on the streaming features page (/streaming/features.html).

senc=

This allows to set the converter to use to encode the subtitle stream.

The only subtitle encoder we have at this time is dvbsub.

soverlay

This option allow to render subtitles directly on the video, while transcoding it. Do not confuse this option with

senc/scodec that transcode the subtitles and streams them

sﬁlter=

This option allows to render some images generated by a so called subpicture ﬁlter (e.g. a logo, a text string, etc) on top of

the video.

List of available subpicture ﬁlters can be found on the streaming features page

(http://www.videolan.org/streaming/features.html). The Item options of this modules can be found using the following

command line:

% vlc -p --advanced <module name>

threads=

This options allows to set the amount of threads that should be used to encode the streams. Increasing this number to the

amount of processors on the computer, (or twice this number on Intel P4 HT processors) should improve transcoding

performance.

audio-sync

When this option is enabled, VLC will drop/duplicate video frames to synchronize the video track on the audio track.

duplicate

This module can be used to duplicate the stream, and so process it through several different chains.

Available options are:

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Matrix Elements VB-800 Manual do Utilizador Página 33