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 41^st frame and read 4 more samples (file has a total of 45 frames).
5. Seek back to 1^st 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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[Dinesh Iyer]

Hi team,

I just wanted to know if you had an opportunity to look into this issue and were able to reproduce this with the steps provided. This is kind of a show-stopper for us. Appreciate any inputs an advance.

Dinesh

On Mon, Apr 2, 2018 at 3:35 PM, Dinesh Iyer <[hidden email]> wrote:

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 41^st frame and read 4 more samples (file has a total of 45 frames).
5. Seek back to 1^st 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!

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[Dinesh Iyer]

Hi Tim,

Thanks for working with me on the IRC chatroom today. I have updated my code to fix the error you were getting when running it.

https://drive.google.com/open?id=14imemqvC5bP7xhDsFPbUkHG9SWmSK4Fz

I am going to try to install the -dbg libraries and see if I can get the debug symbols. This is a sporadic issue and it is kind hard to to reproduce it with this standalone but it happens in our app quite regularly.

Also, the post https://lists.freedesktop.org/archives/gstreamer-devel/2018-April/067631.html shows a behaviour on Gstreamer 1.10.4 that was not the case on older Gstreamer version. When using gst-launch:

i. It does not shutdown pipeline when all frames have been read. (Debian 8, it used to)

ii. If I hit Ctrl+C to terminate, it stalls when pipeline transitions from PLAYING->PAUSED. (we have observed this numerous times in our code with audio and video files when we try to shutdown pipeline). Hence, we thought this might be related.

Thanks again.

Dinesh

On Fri, Apr 6, 2018 at 7:34 AM, Dinesh Iyer <[hidden email]> wrote:

Hi team,

I just wanted to know if you had an opportunity to look into this issue and were able to reproduce this with the steps provided. This is kind of a show-stopper for us. Appreciate any inputs an advance.

Dinesh

On Mon, Apr 2, 2018 at 3:35 PM, Dinesh Iyer <[hidden email]> wrote:

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 41^st frame and read 4 more samples (file has a total of 45 frames).
5. Seek back to 1^st 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!

_______________________________________________
gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel