Matrix Elements VB-800 Manual de usuario descargar pdf (Pagina 30)

Chapter 3. Advanced streaming using the command line

dst-audio=

Use this option to set the location where the audio elementary streams should be saved, sent, or made available. The exact

meaning of this option depends on the value of the access-audio option and is the same as for the url option of the standard

module (see above).

Note: If you use the %d string in the url ﬁeld, VLC will replace it by the number of the audio or video track considered.

The %c string will be replaced by the name (FOURCC) of the codec of the track.

dst=

This option can be used instead of both dst-video and dst-audio options, when they share the same setting.

transcode

You can use this module to transcode a stream, i.e. to change its codecs or the encoding bitrates. Some additional

processing can be done during this process, such as re-scaling, deinterlacing, resampling, etc.

Note: Depending on the bitrate of the original stream and of the options chosen, transcoding can be a very CPU

intensive task. As a consequence, streaming of a real time transcoded stream can lead to dropped frames or a jerky

image and sound in some cases, when running out of resources.

Available options are:

vcodec=

This options allows to specify the codec the video tracks of the input stream should be transcoded to.

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

vb=

This option allows to set the bitrate of the transcoded video stream, in kbit/s

venc=

This allows to set the encoder to use to encode the videos stream. Available options are:

• ffmpeg: this is the libavcodec encoding module. It handles a large variety of different codecs (the list can be found on the

streaming features page (/streaming/features.html).

Item options are: keyint=<number of frames> allows to set the maximal amount of frames between 2 key frames,

hurry-up allows the encoder to decrease the quality of the stream if the CPU can’t keep up with the encoding rate,

interlace allows to improve the quality of the encoding of interlaced streams, noise-reduction=<noise reduction factor>

enables a noise reduction algorithm (will decrease required bitrate at the cost of details in the image), vt=<bitrate

tolerance in kbit/s> allows to set a tolerance for the bitrate of the outputted video stream, bframes=<amount of frames>

allows to set the amount of B frames between 2 key frames, qmin=<quantizer> allows to set the minimum quantizer

scale, qmax=<quantizer> allows to set the maximum quantizer scale, qscale=<quantizer scale> allows to specify a

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 64 65

Sin comentarios

Matrix Elements VB-800 Manual de usuario Pagina 30