H.264 Codec

Scutum

I recently purchased C6748LCDK and started by running facedetect demo. Later ON, I modified the demo application to add NDK and other libraries. The objective is to develop a video application and send a live video stream over the network. I was able to connect to a remote PC and send raw YUV4:2:0 (320x240) video without any compression. That was a little difficult but works fine.

I added then the dm6446_h264enc_02_02_00_02 video codec with the idea of compressing video in H.264 format. After relatively long work hours, the program compiled without errors. I was able to send h.264 compressed video but the video image in the receiver side is Amorphous (can recognized any features on the original image). The strange thing is that the H.264 decoder on the receiver side does not crash. Everything received seems to be OK, the H.264 SPS, PPS and P-Frames are received fine. It seems that the video codec input image buffers are not set properly, but I have checked them several times.

Can you please help?

I am using CCS6.1, dm6446_h264enc_02_02_00_02,bios_6_33_01_25, framework_component_3_20_02_29, xdctools_3_23_00_32

Thanks,

Scutum

over 9 years ago

0 Sivaraj Kuppuraj over 9 years ago

TI__Mastermind 35645 points

Hi,

Thanks for your post.

I think, the below E2E post would help you in identifying the possible usecases to test the dm6446_h264enc_02_02_00_02_production example application on a C6748 and identifying possible issues which you could try out:

Have you configured DMAN3 algorithm on your video application code so that, you would require proper initialization of DMAN3_init() call and try to run the H.264 encoder example on a C6748. For more details on the above, please refer the below E2E post:

https://e2e.ti.com/support/embedded/multimedia_software_codecs/f/356/t/279863

You could also check the below links to download the c64x+ video codec which would be more compatible to c6748:

http://software-dl.ti.com/dsps/dsps_public_sw/codecs/C64XPlus_Video/index_FDS.html

http://focus.ti.com/dsp/docs/dspfindtoolswbytooltype.tsp?sectionId=3&tabId=1460&toolTypeId=65&familyId=44

Thanks & regards,

Sivaraj K

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0 Scutum over 9 years ago in reply to Sivaraj Kuppuraj

Intellectual 355 points

Hi Sivaraj,

I read those post several times. The problem is that originally the codec software was developed for BIOS 5.x and I am using Bios 6.x. There are several Bios6 library changes and the compiler throws several errors while using in Bios 6.x.

I solved the problem by compiling a library with Bios 5.x and then calling library from application running in Bios6.x

Thanks for your help.

Scutum

0 Sivaraj Kuppuraj over 9 years ago in reply to Scutum

TI__Mastermind 35645 points

Hi,

Thanks for your update since this would help other E2E community members.

Thanks & regards,

Sivaraj K

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0 Avi Tal over 9 years ago in reply to Sivaraj Kuppuraj

Expert 1120 points

Dear friends,

What is the performance capabilities of the C6748 with regards to h264 encoding (Image Resolution, Frame Rate, ...).

For example, what frame rate can be achieved for 640x480 4:2:2 in 400kbps?

Thanks allot,

Avi Tal.

0 Scutum over 9 years ago in reply to Avi Tal

Intellectual 355 points

Hello Avi,

On performance tests, I measured 80ms processing time on a 300Mhz C6748 and resolution 640x480. This is roughly 12.5 FPS

Scutum

0 Avi Tal over 9 years ago in reply to Scutum

Expert 1120 points

Thanks allot Scutum!

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H.264 Codec