writing MXF video the includes GPS times

Sebastian Dröge sebastian.droege at collabora.co.uk
Thu Aug 11 09:28:12 PDT 2011

On Thu, 2011-08-11 at 10:16 -0600, Cory Albright wrote:
> Unfortunately I do not have a specification for exactly how the
> GPS time is embedded, but I do have a sample video that was
> constructed by different means that does contain the GPS times.
> Maybe a little reverse engineering will help with this.  I am
> new to gstreamer (and MXF), so I still have some learning to do.
>      It is my understanding that the time is to be saved in the
> header of each frame, as opposed to a timestamp at the start and
> calculating relative offsets based on frame number.

You should really get the MXF specs from SMPTE then. Currently it works
the way how you described it but it's possible to have timecode tracks
and then timecode information in the System element of every edit unit.
There are multiple standards for storing the timecode information.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20110811/b4e9b6a5/attachment-0001.pgp>

More information about the gstreamer-devel mailing list