Vivotek VS8801 Specifications download pdf (Page 178)

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178 - User's Manual

URL Command Document for VS8401-VVTK

8.19 Open Timeshift Stream (capability.timeshift > 0,

timeshift_enable=1, timeshift_c<n>_s<m>_allow=1)

Note: This request requires Viewer access privileges.

Syntax:

For HTTP push server (MJPEG):

http://<servername>/<network_http_s<m>_accessname>?maxsft=<value>[&tsmode=<value>&refti

me=<value>&forcechk&minsft=<value>]

For RTSP (MP4 and H264), the user needs to input the URL below into an RTSP compatible player.

rtsp://<servername>/<network_rtsp_s<m>_accessname>?maxsft=<value>[&tsmode=<value>&refti

me=<value>&forcechk&minsft=<value>]

“n” is the channel index.

“m” is the timeshift stream index.

For details on timeshift stream, please refer to the “TimeshiftCaching” documents.

PARAMETER VALUE DEFAULT DESCRIPTION

maxsft <positive

integer>

0 Request cached stream at most how many seconds

ago.

tsmode normal,

adaptive

normal Streaming mode:

normal => Full FPS all the time.

adaptive => Default send only I-frame for MP4 and

H.264, and send 1 FPS for MJPEG. If DI , VI or

motion window are triggered, the streaming is

changed to send full FPS for 10 seconds.

(*Note: this parameter also works on non-timeshift

streams.)

reftime mm:ss The time

camera

receives the

request.

Reference time for maxsft and minsft.

(This provides more precise time control to eliminate

the inaccuracy due to network latency.)

Ex: Request the streaming from 12:20

rtsp://10.0.0.1/live.sdp?maxsft=10&reftime=12:30

forcechk N/A N/A Check if the requested stream enables timeshift,

feature and if minsft is achievable.

If false, return “415 Unsupported Media Type”.

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