Call Us Today! 877.742.2583




Page tree
Skip to end of metadata
Go to start of metadata

About

mod_fsv implements functions to record and play back RTP video frames in FreeSWITCH.

 

 Click here to expand Table of Contents

Format Interface

You could use the file interface for audio only record/playback

Dialplan app:

API:


uuid_record also can record video, but at this time it only records one leg of audio and video.

Recording in conference is also possible with:

File Format

FSV probably means "FreeSWITCH Video". An FSV file is a native format to store audio (L16) and video (codec native) frames as seen inside RTP packets. The format is machine-dependent; especially there seems to be no allowance in the code for endian-ness (so files recorded on a big-endian machine for example would not work on a little-endian machine, etc).

The file header consists of a 4 byte version ID, 32 byte IANA video codec name (presumably RFC4855 and similarly-registered names), 128 byte video format descriptor (the content of the SDP format-specific parameters "fmtp" attribute field), 4 byte audio rate, 4 byte audio packetization time, and a creation time tag.

The frames are stored in the order received. A frame header, presumably 4 bytes in length (but stored as an "int", in native endian), is used; the top bit is one if frame is video, zero if audio; the 31 lower bits are used to store the frame length.

Conversation About Packetization and File Formatting

I'm going to come back and clean this up when i have a little more time to think about how to word it as documentation. – Chris Tunbridge Destreyf

Related Conversation:

irc #freeswitch

Other

Try calling 9193 and 9194 in the 'vanilla' dialplan with a video phone.