User manual

VIVOTEK
312 - User's Manual
8.20 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=<v
alue>&forcechk&minsft=<value>]
For RTSP (MP4 and H264), the user needs to input theURL below into an RTSP compatible player.
rtsp://<servername>/<network_rtsp_s<m>_accessname>?maxsft=<value>[&tsmode=<value>&reftime=<va
lue>&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 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”.
minsft <positive
integer>
0 How many seconds of cached stream client can accept at least.
(Used by forcechk)
Return Code Description