topic MJPEG decoder is slow, decoding @ half rate in Intel® Integrated Performance Primitives

MJPEG decoder is slow, decoding @ half rate

vikas_krv85 — Wed, 08 Aug 2012 07:19:57 GMT

Dear All,

We are using IPP verion 7Package ID: w_ipp_7.0.1.127 w_ccompxe_2011.1.127 and samplesw_ipp-samples_p_7.0.7.064

We are receving stream from IP camera and decoding for analytics purpose

When we set fps = 15 in camera and try to decode with MJPEG decoder we are getting only 7-8 fps, if we find SOI and EOI and pass to JPEG decoder we are getting 13 - 14 fps

Please help

Thanks,

Vikas K R

MJPEG decoder is slow, decoding @ half rate

vikas_krv85 — Thu, 09 Aug 2012 03:57:58 GMT

someonePlease help

MJPEG decoder is slow, decoding @ half rate

Sergey_K_Intel — Thu, 09 Aug 2012 04:33:35 GMT

Hi Vikas,

Do you use multi-threaded decoder? If yes, try to build single-thread decoder, or you may continue compile decoder as multi-threaded, but build the final application with single-thread IPP libraries. It may happen, that oversubscription takes place here.

Reply how it goes.

Regards,

Sergey

MJPEG decoder is slow, decoding @ half rate

vikas_krv85 — Mon, 13 Aug 2012 06:01:12 GMT

Hi Sergey,

Where do we do this?

We are usingm_pVidDecparams->numThreads = 1, this should be single thread decoder right?

Regards,

Vikas K R

MJPEG decoder is slow, decoding @ half rate

Pavel_V_Intel — Mon, 13 Aug 2012 14:37:37 GMT

Good day.

Can you share this stream? I'd like to take a look.

MJPEG decoder is slow, decoding @ half rate

vikas_krv85 — Tue, 14 Aug 2012 06:26:27 GMT

Sorry my bad :(

Issue Solved, after decoding one image, we cleared my receiving buffer which actually had next frame data, because of this used to get half frame rate

Now getting full frame rate :)