mosaic occur on mpeg4 video when dm365 runs for a period of time.

Hi Zech yu,

Can you pls tell us the following

-- Version no of Mpeg4 encoder

-- Detailed API parameter used for the codec

regards

Yashwant

Hi , Yashwant Dutt

mpeg4enc version:210_V_MPEG4_E_01_10

parameters are below,

IMP4VENC_Params->VIDENC1_Params->size:84
IMP4VENC_Params->VIDENC1_Params->dataEndianness:1
IMP4VENC_Params->VIDENC1_Params->encodingPreset:3
IMP4VENC_Params->VIDENC1_Params->inputChromaFormat:9
IMP4VENC_Params->VIDENC1_Params->inputContentType:0
IMP4VENC_Params->VIDENC1_Params->maxBitRate:4000000
IMP4VENC_Params->VIDENC1_Params->maxFrameRate:30000
IMP4VENC_Params->VIDENC1_Params->maxHeight:480
IMP4VENC_Params->VIDENC1_Params->maxWidth:640
IMP4VENC_Params->VIDENC1_Params->maxInterFrameInterval:0
IMP4VENC_Params->VIDENC1_Params->rateControlPreset:1
IMP4VENC_Params->VIDENC1_Params->reconChromaFormat:9
----------------
IMP4VENC_Params->IFrameBitRateBiasFactor:0
IMP4VENC_Params->PFrameBitRateBiasFactor:0
IMP4VENC_Params->minBitRate:0
IMP4VENC_Params->peakBufWindow:0
IMP4VENC_Params->rotation:0
IMP4VENC_Params->subWindowHeight:480
IMP4VENC_Params->subWindowWidth:640
IMP4VENC_Params->svhMode:0
IMP4VENC_Params->vbvSize:0
----------------
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->size:100
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->captureWidth:0
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->forceFrame:-1
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->generateHeader:0
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->inputHeight:480
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->inputWidth:640
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->interFrameInterval:0
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->intraFrameInterval:30
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->mbDataFlag:0
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->refFrameRate:30000
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->targetBitRate:2000000
IMP4VENC_DynamicParams->IVIDENC1_DynamicParams->targetFrameRate:30000
----------------
IMP4VENC_DynamicParams->initQ:4
IMP4VENC_DynamicParams->interFrameQP:0
IMP4VENC_DynamicParams->intraAlgo:0
IMP4VENC_DynamicParams->intraFrameQP:0
IMP4VENC_DynamicParams->meAlgo:0
IMP4VENC_DynamicParams->mvDataEnable:0
IMP4VENC_DynamicParams->numMBRows:30
IMP4VENC_DynamicParams->rateFix:0
IMP4VENC_DynamicParams->rateFixRange:2
IMP4VENC_DynamicParams->rcQMax:31
IMP4VENC_DynamicParams->rcQMin:2
IMP4VENC_DynamicParams->skipMBAlgo:0
IMP4VENC_DynamicParams->unrestrictedMV:0

more infomation, when mosaic occurs, both the QP of I frame and P frame are 31

regards

Zech

Hi , Yashwant Dut

I have another question. IVIDEO_RateControlPreset is set to IVIDEO_LOW_DELAY. it means that the CBR is select. but bitrate of mpeg4 video isn't constant when the capture object changes while bitrate of this work mode on DM355 is constant. 

regards

Zech Yu

Hi Zech,

Thanks for the data. I have a few more questions.

Does the issue happen during every run or is it intermittent?

Can you attach a screen grab or if possible, a short clip when the mosaic occurs?

Does the encoder recover or does it stay corrupt?

Regards,

Akshay

Hi Akshay,

Mosaic issue can be reproduced on every camera.  the DM365 is started up and work normaly about 2 or 3 hours. then the mosaic occurs. and it stay about half an hour and the encoder recover automatically.

I have further findings. only set the dynamic parameters can recover encoder white reset encoder by Vedeo1_control can recover it. so I have no choice but to introduce a workaround to avoid this issue.

I try to enclose a m4v file but failed. I will send to you if you could provied your email address.

Hi zech,

I've tried to reproduce the issue you are seeing but was unable to generate it. I tried for a continuous run of almost 4.5 hours. 

Can you send me the m4v sample? My email address is listed on my profile information.

Thank You,

Akshay