[Libav-user] Retrieving absolute timestamps from IP cameras
bowljoman at gmail.com
Tue Nov 26 19:39:11 CET 2013
On 11/26/2013 12:34 AM, Dídac Pérez wrote:
> Hi all,
> I am using ffmpeg C++ libraries for connecting to network IP cameras
> and retrieve the video stream through RTSP. I need to synchronize the
> video frames to another video stream whose frames have timestamps that
> come from a GPS signal. The problem is that I am not able to find the
> absolute timestamp of the frames I get from the cameras. pts/dts
> values are zero-based relative to the first frame, but I don't know
> how to know the absolute timestamps (for instance, relative to 1 Jan
> 1900). In addition, I don't know if it is actually possible.
> Please, I am stuck in this point and I need urgent help with this, and
> I will really appreciate any help from you. Thank you so much.
> Kindest regards,
> Dídac Pérez
> Libav-user mailing list
> Libav-user at ffmpeg.org
RTCP Sender Reports can be used and ip cams usually include them
THe camera manufacturer should have more info on setting up a local
network clock for the cameras to sync their clocks to.
Using Axis? they have so much documentation that you can accomplish
everything you can imagine.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Libav-user