VIVOTEK
178 - User's Manual
79
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”.
