DM36x Image Encoder Hang

Randy Scheifele

I am having a problem with the jpeg encoder hanging on my DM368 with gstreamer. I am running a gstreamer pipeline that encodes both h264 (full frame rate) and jpeg (once per second). Most of the time, it works fine. However, I've written a test program to create the pipeline, run it for 5 seconds, and then tear it down. This program runs in a loop (process never exits) and the jpeg encoder hangs at various iterations. I have enabled debugging inside of the gstreamer and I get a print that it is entering the codec process function and I never get the printout that it finished the process function (in the case where it fails). I've also enabled CE_DEBUG and DMAI_DEBUG but haven't seen any reason why the encoder would hang.

After I get the jpeg encoder to hang in the process function, I can terminate my program and run a very simple gstreamer pipeline that includes the jpeg encoder element and it still hangs. I've noticed that if I run a very simple pipeline with just a h264 encoder it seems to somehow reset something because the jpeg encoder starts to work again after I run a h264 pipeline.

I've read that there is a debug version of the h264 codec but couldn't find anything on a debug version of the jpeg codec. Are there any more debugging techniques that can be used to track down why this jpeg encoder just hangs?

Thanks,

Randy Scheifele

over 12 years ago

0 Veeranna Hanchinal over 12 years ago

TI__Expert 8465 points

Hi,

Can you please share JPEG encoder params and its version?. are you creating both codecs in same group ID or different?. And hope you are setting resethdvicpEveryFrame equal to 1. Can you also try by setting enableDDRBuf to 1 if you are not setting.

In our IPNC set up we are running H264 encoder for 1080p and 480p of JPEG encoder, we did not see hang.

Thanks,

Veeranna

0 Randy Scheifele over 12 years ago in reply to Veeranna Hanchinal

Intellectual 550 points

Hi Veeranna,

I am using the latest version of the JPEG encoder (01.00.00.12). The H264 codec and JPEG codec are in different group ID's and the enableDDRBuf on the H264 encoder is set to 1. I am not sure what the value of the resethdvicpEveryFrame parameter is on our system. I will look at that and get back to you.

Which parameters of the JPEG encoder are you interested in? I think I am mostly using defaults (but changing the q value for different quality levels).

Thanks,

Randy

0 Veeranna Hanchinal over 12 years ago in reply to Randy Scheifele

TI__Expert 8465 points

Hi Randy,

Pl share input and ouput format, and video resolution of Jpeg and H264. Can you also try by keeping both in same groupID(not a solution, but helps to find the issue)

Thanks,

Veeranna

0 Randy Scheifele over 12 years ago in reply to Veeranna Hanchinal

Intellectual 550 points

Veeranna,

The input format for both the h264 and jpeg encoder is 736x480 NV12 YUV 4:2:0. The output format is the same resolution as the input. I can put both encoders in the same group ID. What would that tell me?

Thanks,

Randy

0 Randy Scheifele over 12 years ago in reply to Randy Scheifele

Intellectual 550 points

Veeranna,

I was using the default value for resethdvicpEveryFrame which according to the user guide is 1. However, the comment in the user guide says that I can set it to 2 for h264 encoder is running with mjpeg. I just made the change to change it to 2. What value was used on the IPNC?

Are there any more debugging techniques I can use to figure out why it is hanging? I'll try these new settings and report back if I still get a hang. If there are any other things to look at in the meantime let me know.

Thanks,

Randy

0 Randy Scheifele over 12 years ago in reply to Randy Scheifele

Intellectual 550 points

Veeranna,

I am now using the resethdvicpEveryFrame set to 2 and also moved the h264 and jpeg encoder in the same scratch group and still experience the encoder hanging. Once it is up and running, it seems to be fine but many start/stop cycles seems to bring the issue out. Is there anything I can do to completely reset the codec(s) before I start a new capture?

Thanks,

Randy

0 Veeranna Hanchinal over 12 years ago in reply to Randy Scheifele

TI__Expert 8465 points

Hi Randy,

Putting codecs in same groupID ensures, both runs sequnetially and avoids resource(like EDMA) confliction. We will try to have your setup in our IPNC(running JPEG encoder after every 30 or 60 frames of H264).

Thanks,

Veeranna

0 Veeranna Hanchinal over 12 years ago in reply to Veeranna Hanchinal

TI__Expert 8465 points

If your issue is resolved, you can try below suggestions.

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/p/287040/1001517.aspx

0 Brad Caldwell over 12 years ago in reply to Veeranna Hanchinal

TI__Genius 12595 points

Randy,

Did you verify the problem still exists if you put both codecs into the same group ID?

Processors

Processors forum

DM36x Image Encoder Hang