Usage:
  gst-transcoder [OPTION…] <source uri> <destination uri> [<encoding format>[/<encoding profile name>]]

gst-transcoder-1.0 transcodes a stream defined by its first <input-uri>
argument to the place defined by its second <output-uri> argument
into the format described in its third <encoding-format> argument,
or using the given <output-uri> file extension.

The <encoding-format> argument:
===============================

If the encoding format is not defined, it will be guessed with
the given <output-uri> file extension.
<encoding-format> describe the media format into which the
input stream is going to be transcoded. We have two different
ways of describing the format:

GstEncodingProfile serialization format
---------------------------------------

GStreamer encoding profiles can be described with a quite extensive
syntax which is described in the GstEncodingProfile documentation.

The simple case looks like:

    muxer_source_caps:videoencoder_source_caps:audioencoder_source_caps

Name and category of serialized GstEncodingTarget
-------------------------------------------------

Encoding targets describe well known formats which
those are provided in '.gep' files. You can list
available ones using the `--list-targets` argument.


Help Options:
  -h, --help              Show help options
  --help-all              Show all help options
  --help-gst              Show GStreamer Options

Application Options:
  -c, --cpu-usage         The CPU usage to target in the transcoding process
  -l, --list-targets      List all encoding targets
  -s, --size              set frame size (WxH or abbreviation)
  -r, --audio-rate        set audio sampling rate (in Hz)
  -f, --framerate         set video framerate as a fraction (24/1 for 24fps) or a single number (24 for 24fps))
  -v, --video-encoder     The video encoder to use.