Sporadic stall during seeking on Gstreamer 1.10.4 (Debian 9, Ubuntu 17.10)

[Dinesh Iyer]

Hello Gstreamer developers,



I would like to report a sporadic stall in gstreamer 1.10.4 (Debian 9) or
higher versions while reading video files. I have created a standalone
script, the file and the video file can be found in the following location:

https://drive.google.com/open?id=14Qss_2-EBeRb5k204pcoIz7_AgmR1FRl


https://drive.google.com/open?id=15xZ1wcuQBN7pPxU7Ru08hSR7YagUQV6w



The GDB stack trace from my machine can be found here:

https://drive.google.com/open?id=1M8Srjd1Qp4Y8C8Edepme2lwzzWSpOZM3



The stall seems to be appearing in gst_element_seek_simple ().



Here is what I am trying to do in my application:

   1. Create the playbin.
   2. Set the playbin to PLAYING.
   3. Seek and read the first frame.
   4. Seek and read the 41st frame and read 4 more samples (file has a
   total of 45 frames).
   5. Seek back to 1st frame. That is where the STALL happens.



I have put the number of iterations to be 5000 but usually the stall
appears in around 200-300 iterations.



Can you please confirm if this is a bug in Gstreamer and if there is a way
to avoid the stall while reading the file using Gstreamer?



Thanks!
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