DM6437

Newton

We have DM6437 and TI h.264 codec V1.10 on it. The Davinci works as a decoder, with h.264 streams generated by another encoder.
The encoder generates baseline profile streams with every I-frame/slice encoded as an IDR. One of these streams is generated with I-slice/frames that are NOT IDR. We see that the decoder will in this case wait forever and never render. Whenever this third party h.264 encoder is first started then it will generate an IDR I-frame and the decoding will start but the encoder will only do this on start of a stream. We have no control over the encoder and need to find a way to configure the TI decoder to tolerate this type of stream. VLC, Elecard, Leadtools and others don't have problems with decoding and rendering this same stream. Is there a a setting or compile flag that can allow this stream to be decoded ?

over 15 years ago

0 Prateek Bansal over 15 years ago

TI__Expert 4510 points

Can we get sample bit stream that fails?

Thanks,

Prateek

0 Newton over 15 years ago

Expert 1125 points

Prateek,

Thanks.

I will get you the failed 7 non failing bit stream tomorrow.

In the meantime, is V1.10 of H.264 CODEC the latest?

Also, can our Decoder work with I-Slice Frames that are NOT IDR?

regards

0 Newton over 15 years ago in reply to Newton

Expert 1125 points

I meant failed & non failing.

regards

0 pradhyum over 15 years ago in reply to Newton

TI__Expert 3385 points

The XDM 1.0 H.264 BP decoder supports decoding of non–IDR streams.

H.264 decoder version v1.10 does not support non-IDR streams, that is very old codebase. That support is added in later versions: Version 1.14 H.264 MP decoder Version 1.20 H.264 BP decoder

Customer needs to migrate to version 2.00 BP decoder release that is based on XDM v1.x and need to migrate his application accordingly.

0 pradhyum over 15 years ago in reply to pradhyum

TI__Expert 3385 points

details on XDM v1.x vs XDM v0.9 release

http://wiki.davincidsp.com/index.php/Upgrading_to_a_new_XDM_version

-Pradhyum

0 Newton over 15 years ago in reply to pradhyum

Expert 1125 points

Is there really a V1.20 of the baseline profile or did you mean V2.00? If V1.20 is truly available then would it be easier to integrate it instead of going all the way to V2.00?

regards

0 Newton over 15 years ago in reply to Newton

Expert 1125 points

Also,

Can TI provide an example of the H.264 BP decoder v2.0 working on the DM6437 board? We are concerned that the only platform this decoder has been verified on is the DM6446 with the embedded ARM9. If this is true we may need some advise from TI as to how to re-port to the DM6437.

0 Vincent W. over 15 years ago in reply to Newton

TI__Genius 12865 points

Hi Himansu,

If you download the DVSDK 2.0 (http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/S1SDKLNX/DVSDK_2_00/index_FDS.html), the DMAI example in dmai_x_xx_xx_xx\packages\ti\sdo\dmai\apps\video_decode_io2 can be used to run XDM1.2 video decoders on the DM6437 (even though the DVSDK is really meant for other DM devices). Check out the DMAI user guide in the dmai_x_xx_xx_xx directory for more information on how to run the example on DSP/BIOS.

Best regards,

Vincent

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