Command line converter for VoH and ViQ

For streaming media is not generated real-time as it would heavily reduce the number of concurrent sessions the service would be able to serve, rather the to be streamed content is pre-generated and stored in Verba proprietary media format.

The vmfconverter.exe command line tool shipped with Verba is the conversion tool to generate the streaming optimized media files from any standard MP4 video clips.

It generates the following streams from which the most desired one is selected by the streaming service at call setup based on capabilities of remote video endpoints/phones and available bandwidth advertised:

Video:

• • H.264 1080p - 4 mbps
  • H.264 720p - 2.5 mbps
  • H.264 720p - 1.5 mbps
  • H.264 288p - 512 kbps
  • H.264 288p - 256 kbps

Audio

• • Opus 48 KHz stereo
  • G.722.1 32 KHz
  • G.722
  • G.711 u/a
  • G.729

Video streams will be generated only for those resolutions from the above list which are less or equal of the input video stream's resolution, ie. if a 720p MP4 file is converted then 1080p video stream will not be generated.

The tool has the following cmd syntax:

vmfconverter.exe input.mp4 output.vmf (where input/output is either a full or relative path of the media files)

During processing the tool provides progress information and estimated time to finish processing.