Vivotek FE8172V User Manual page 213

8.23 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>&reftime
=<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>&reftime
=<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
maxsft <positive
interger>
tsmode normal,
adaptive
reftime mm:ss
forcechk N/A
minsft <positive
DEFAULT DESCRIPTION
0 Request cached stream at most how many seconds ago.
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 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.)
The time Reference time for maxsft and minsft.
camera receives (This provides more precise time control to eliminate the
the request. inaccuracy due to network latency.)
Ex: Request the streaming from 12:20
rtsp://10.0.0.1/live.sdp?maxsft=10&reftime=12:30
N/A Check if the requested stream enables timeshift, feature
and if minsft is achievable.
If false, return "415 Unsupported Media Type".
0 How many seconds of cached stream client can accept at
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User's Manual - 213