TDA4VM: whether TDA4 Encoder support DTS and PTS

xiaowen huang

Part Number: TDA4VM

HI TI:

we use the folowing encoder parameter to generate H264 stream(store these output from OPenVX encoder node to one file), but when decoding this H264 stream. we find these 3 issues:

any idea about this? thanks. attached more logs.

1: after check the H264 stream by FFMPEG tools, we find that there are no PTS and DTS in H264 packet .

2: time-scale in H264 packet is always 0.

2: we have set ctx->rc.intra_freq = 30, but all frame type is I , there are no P frame.

Do i need to set this ctx->vparams.intra_cnt to 30 also?

3： there are some MB decoding error. i already set ctx->rc.bits_per_second = 15000000. 100万摄像头

/* Rate Control parameters */
ctx->rc.bits_per_second = 15000000; /* 5mbps -> 15mbps 15x4=60<100mbps*/
ctx->rc.transfer_bits_per_second = ctx->rc.bits_per_second;

ctx->vparams.idr_period = 60; /* update pps, normally 1 minutes, now 2s->1 IDR*/
ctx->rc.intra_freq = 30; /* all I-Frame encoding, 1s -> I Frame */
ctx->vparams.intra_cnt = 1;

over 5 years ago

0 xiaowen huang over 5 years ago

Prodigy 120 points

another, how can i enable PTS DTS for h264 stream? thanks.

0 Vineet Roy over 5 years ago in reply to xiaowen huang

TI__Mastermind 37435 points

SDK version ?

Regards

Vineet

0 Ming Zhong10 over 5 years ago in reply to Vineet Roy

TI__Intellectual 2235 points

7.0

0 xiaowen huang over 5 years ago

Prodigy 120 points

correct: DTS and PTS

0 xiaowen huang over 5 years ago in reply to xiaowen huang

Prodigy 120 points

Hello TI：

Do I need to this setting to support P frame? from ctx->vparams.intra_cnt = 1 to ctx->vparams.intra_cnt = ctx->rc.intra_freq;

ctx->vparams.idr_period = 60; /* update pps, normally 1 minutes, now 2s->1 IDR*/
ctx->rc.intra_freq = 30; /* all I-Frame encoding, 1s -> I Frame */
ctx->vparams.intra_cnt = ctx->rc.intra_freq; //need it?

0 xiaowen huang over 5 years ago in reply to xiaowen huang

Prodigy 120 points

when play encoded H264 file by ffplay.exe , meet this issu, any idea? we stored this outpit from openvx encoder node to file, there are no error when writing file.

left block unavailable for requested intra mode

error while decoding MB 0 31, bytestream 18768

0 xiaowen huang over 5 years ago in reply to xiaowen huang

Prodigy 120 points

Hi TI:

please give some suggestion ,expecially for item1 item2, thanks

0 Sunita Nadampalli over 5 years ago in reply to xiaowen huang

TI__Expert 5970 points

Hi Xiaowen Huang,

1: after check the H264 stream by FFMPEG tools, we find that there are no PTS and DTS in H264 packet .

I think display delay (picture_dealy_unit) provides information for PTS/DTS calculation. Since we don’t support B-frames, both PTS and DTS are the same.

2: time-scale is always 0.

3: we have set ctx->rc.intra_freq = 30, but all frame type is I , there are no P frame. Do i need to set this ctx->vparams.intra_cnt to 30 also?

Yes.

3： there are some MB decoding error. i already set ctx->rc.bits_per_second = 15000000. 100M Pixel camera.

Are there any errors during encoding?

Thanks & Regards,

Sunita.

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TDA4VM: whether TDA4 Encoder support DTS and PTS