User`s guide

Dialogic
®
Host Media Processing Software Release 4.1LIN Release Guide 27
Features
Digital Video Recorder (DVR) controls
These controls enable the user to pause, resume, and seek during video and audio
playback. DVR controls are supported for native connections or transcoding-enabled
connections. This feature is implemented in the Dialogic
®
Multimedia API Library.
Direct 3GP (3GPP) file play
This feature enables a standard 3GP file to be played. The file can contain AMR-NB
audio format and MPEG-4 video format; or AMR-NB and hinted H.263 using RFC
2190 or RFC 2429 (H.263-1998) packetization. This feature is implemented in the
Dialogic
®
Multimedia API Library.
Note: The file containing H.263-1998 using RFC 2429 (RFC 4629) packetization
can only contain baseline H.263 (no options). This is the same restriction that
applies for receiving H.263-1998 using RFC 2429 (RFC 4629) packetization
from an RTSP server.
Enhanced video bitrate controller
This feature improves bitrate conformance, audio/video synchronization, and video
bandwidth utilization.
Multimedia User I/O
This feature enables applications to directly play and record RTP data via user I/O
buffers. This feature is implemented in the Dialogic
®
Multimedia API Library. For more
information, see Section 5.10, “Dialogic
®
Multimedia API Library”, on page 42.
Other Features
Other multimedia features previously supported include:
Multimedia programming libraries
Several programming libraries provide multimedia-related functionality:
• The Dialogic
®
Multimedia API library records and plays multimedia data using a
multimedia device.
• The Dialogic
®
Device Management API library connects the multimedia device to
other devices such as an IP media device or an m3g (3G-324M) device.
• Multimedia record and playback between the Dialogic
®
software and remote IP
endpoints is accomplished by using the multimedia device and other devices such
as IP media devices.
• The Dialogic
®
IP Media Library API provides IP multimedia session control.
• The Dialogic
®
Global Call API library provides IP call control for multimedia using
SIP and Session Description Protocol (SDP). The Global Call API library must be
used in third party call control (3PCC) mode.
Multimedia play and record
Support for the following functionality:
• Record from RTP stream to multimedia file. Play from multimedia file into RTP
stream while maintaining synchronization.
• Multimedia API video record and playback with basic playback control and
synchronized audio and video.