Other Topic Library Versions

About proxy/live streaming

The K2 Summit system writes proxy files to a CIFS share, using credentials for the internal system account, which by default is GVAdmin. A proxy file contains the video track, up to eight audio tracks, and timecode. The file is a fragmented MPEG-4 file, which can record/play in chunks. This allows you to play a growing proxy file while it is still recording.

Each K2 Summit system channel multicasts a low-resolution live stream. The K2 Summit system has an HTTP server over which it makes the SDP file available to applications that play the live stream. The K2 Summit system can also generate low-latency streaming media for use by DynoZoom and live monitoring. Refer to related topics in the "Configuring the K2 System" section of this Topic Library.

A Type II, Type III, or Type IV CPU module is required to support proxy/live streaming.

An AppCenter Pro or AppCenter Elite license on the K2 Summit system enables proxy/live streaming. If licensed for AppCenter Pro, a live stream is available from each of the four channels. If licensed for AppCenter Elite, ChannelFlex features allow you to configure up to eight inputs/outputs, so up to eight live streams are similarly available. When a K2 Summit system is licensed, in Configuration Manager (a part of the K2 AppCenter application) you can configure proxy/live streaming for each channel. You can turn proxy file recording on or off, and you can turn live network streaming on or off. When you turn proxy file recording on, you can then select up to eight audio tracks to include in the proxy file. You can also turn automatic scene detection on or off. When you turn scene detection on, you can configure the minimum scene length. When you turn proxy live network streaming on, you can then select two audio tracks (one pair) to include in the proxy stream.

If licensed for AppCenter Elite, a ChannelFlex channel generates proxy/live streaming as follows:
  • Multi-cam Recorder — Both high-resolution assets have their own proxy file. Two live streams are also available. If shared audio, the proxy file and live stream are generated as follows: the first input includes video, audio, and timecode; the second input includes video but does not include audio and timecode.
  • 3D / Video + Key — Two live streams are available as follows: the first input/output includes video, audio, and timecode; the second input/output includes video but does not include audio and timecode. Proxy files are not created.
  • Super Slo-Mo Recorder — A video-only proxy file and a video-only live stream are generated that are normal speed, which means that they are one half or one third the Super Slo-Mo record rate.

Proxy recording is not supported for continuous record mode.

Network switches and firewalls must be configured to allow the multicast live streaming traffic. IGMP Snooping must be enabled on the network that carries the low-resolution live streaming traffic.

The GV STRATUS product accesses proxy files through a shared CIFS folder. There is a limit to the number of proxy access connections on the server that hosts the share. Therefore full proxy recording is only supported using one of the recommended GV STRATUS configurations with a proxy server. Recording and storing proxy on the local media storage on a K2 Summit/Solo system is not recommended.

Copyright © 2015 Grass Valley USA, LLC. All rights reserved. K2 Summit 9.5 gvtp_20151106_14:27:14