Hi,

I recorded a file from a grabber card in h264 format and muxed it with matroskamux. When I playing it back, I can seek in both direction, but when i seeking backward, the timestamps increasing continuously. 

This is what happend:

1. start playing from 0, timestamps after parser are increasing
2. seeking 5 sec forward, timestamps are increasing with 5 sec (this is correct)
3. seeking 5 sec backward: seek is success, but the timestamps didn't decreased with 5 sec, they're still increasing...

Is this a bug in the matroskademux or in the h264parse or simply the recorded file is wrong?

I attached a sample file, try to seek and watch the timestamps after the parser, you will see my problem:

I can demonstrate the issue with this pipeline:

GST_DEBUG=3 gst-launch filesrc location=test.mkv ! matroskademux ! h264parse ! ffdec_h264 ! navseek ! xvimagesink sync=false

Seek with left-right arrow, and see the timestamps doesn't started from zero after seeking backward (but they should).

Tibor