DM36x H264dec: interlaced decoding fail

Hi Chris,

Looks like decoder did not get bitstream data for both fields of frame, one field data is missing. Please send us stream, we will verify at our end.

Thanks,

Veeranna

Hi Chris & Veeranan,

How do you do?

This is my test H.264 file, please check.

5224.test.rar

Thanks & regards.

Archer

Hi Archer,

Your attached stream has syntax issue, cabac_alignment_one_bit  field is Zero, but it should be zero. Because of this DM36x decoder is failing to decode properly.

Thanks,

Veeranna

Hi Veeranna,

Thanks for your reply!

The test stream was encodee by "dm365_h264enc_02_20_00_06_production" , and below is the configuration file, Would you like to tell me

 Which parameter control the 'cabac_alignment_one_bit ' bit?

Thanks and regards.

Archer

##########################################################################################
# Parameters
##########################################################################################
ImageWidth   = 704         # Image width in Pels, must be multiple of 16
ImageHeight   = 576         # Image height in Pels, must be multiple of 16
FrameRate   = 25000       # Frame Rate per second*1000 (1-100)
BitRate    = 1572864      # Bitrate(bps)  #if ZERO=>> RC is OFF
ChromaFormat   = 9           # 9 => XDM_YUV_420SP
InterlacedVideo   = 1           # 0 => Progressive, 1 => Interlaced
EnableVUIParam  = 0           # 0 => Disable VUI Parameters, 1 => Enable VUI parameters, 4 => encoded VUI buffer externally provided by Application user
EnableBufSEI   = 0           # 1 => Enable Buffering Period SEI Message, 0 => Disable
ME_Type    = 0           # 0 = Normal Search, 1 = Improved SKip MBs(performance will reduce)
RC_PRESET   = 5           # 1 => Low Delay, 2 => Storage, 3 => 2 Pass, 4 => None, 5 => user defined
ENC_PRESET   = 3           # 0 => default, 1 => High Quality, 2 => High Speed, 3 => user defined

##########################################################################################
# Encoder Control
##########################################################################################
ProfileIDC    = 100         # Profile IDC (66=baseline, 77=main, 88=extended, 100=HighProfile)
LevelIDC    = 40          # Level IDC   (e.g. 20 = level 2.0)
Log2MaxFrameNumMinus4 = 0           # Sets the maximum frame number (Aloowed values 0 -12)
ConstraintFlag   = 0           # Bit 0 set/reset constraint flag 0, Bit 1 set/reset constraint flag 1,Bit 2 set/reset constraint flag 2,Bit 3 set/reset constraint flag 3
IntraPeriod   = 30           # Period of I-Frames (0 -> only 1st one is I- Frame, 1 -> all I-Frames (range 0 - 255)
IDRFramePeriod   = 30           # Period of IDR Frames (0 -> only 1st one is IDR- Frame, 1 -> all IDR-Frames (range 0 - 255) (IDR overrides I, if both periods match)
LongTermRefreshInterval = 0           # Interval to refresh longterm reference frames.
EnableLongTermFrame = 0           # 0 -> Disable using longterm reference frame, 1 -> Use longterm frame for reference
FramesToEncode  = 240           # Number of frames to be coded
SliceSize    = 18           # Size of each slice in bits
RateControl   = 1           # 0 => CBR, 1 => VBR, 2 => Fixed QP, 3=> CVBR, 4=> FIXED_RC 5=> CBR custom1 6=> VBR custom1
MaxDelay    = 2000        # Delay Parameter for Rate Control in milliseconds (>=100)
QPInit    = 28          # Initial QP for RC (-1,0-51)
QPISlice    = 28          # Quant. param for I Slices (0-51)
QPSlice    = 28          # Quant. param for non - I slices (0-51)
MaxQP    = 45          # Maximum value for QP (0-51)
MinQP    = 0           # Minimum value for QP (0-51)
MaxQPI    = 42          # Maximum value for QP for I frame(0-51)
MinQPI    = 0           # Minimum value for QP for I frame(0-51)
AirRate    = 0           # Number of Forced Intra MBs
EntropyCodingMode  = 0           # Entropy Coding Mode (0 = CAVLC, 1 = CABAC)
Transform8x8FlagIntra = 0           # 0 = Disable, 1 = Enable
Transform8x8FlagInter = 0           # 0 = Disable, 1 = Enable
SequenceScalingFlag  = 0           # 0 = Disable, 1 = Auto, 2 = Low, 3 = Moderate, 4 = Reserved , 5 = User Defined Scaling Matrices
PerceptualRC   = 1           # 1 => Enable Perceptual QP modulation, 0 => Disable
EncoderQuality   = 3 # 0 => version 1.1 backward compatible mode, 2 => Platinum mode, 1 => Full feature, high Quality (It is depreciated due to performance reasons)
mvSADout    = 0           # 0->disable mvsad out, 1->enable mvsad out
useARM926Tcm            = 0           # 0->do not use arm 926 tcm 1-> use arm 926 tcm
enableROI               = 0           # 0->disable ROI 1-> enable ROI
mapIMCOPtoDDR           = 0           # 0->do not use DDR 1-> use DDR instead of IMCOP 
metaDataGenerateConsume = 0           # 0->Not in use, 1-> Generate Meta data, 2-> Use Metadata generated by other encoder.  
sliceMode               = 3           # 0 -> no multiple slices, 1 -> multiple slices - bits/slice , 2 -> multiple slices-MBs/slice, 3 -> multiple slices - Rows/slice
numTemporalLayers       = 0           # 0-> one layer, 1-> two layer, 2-> three layer, 3-> four layer, 255 -> Chain free P frames
svcSyntaxEnable         = 0           # 0-> SVC off ST refframes, 1-> SVC on ST refframes, 2-> SVC off LT refframes, 3-> SVC on LT refframes,
outputDataMode          = 1           # 0 -> low latency, encoded streams produced after N (configurable) slices encode, 1 -> encoded stream produce at the end of frame
sliceFormat             = 1           # 0-> encoded stream in NAL unit format, 1 -> encoded stream in bytes stream format
interlaceRefMode        = 0           # 0 = ARF (default mode), 1 = SPF, 2 = MRCF
maxBitrateCVBR          = 2097152      # Max bit rate for CVBR RC algortihm
enableGDR               = 0           # Flag to enable Gradual Decoder Refresh
GDRduration             = 5           # GDR refresh duration                  
GDRinterval             = 30          # Interval between GDR refresh          
#########################################################################################
# Loop filter parameters
##########################################################################################
LoopFilterDisable       = 0           # Disable loop filter in slice header (0=Filter, 1=No Filter, 2 = Disable across Slice Boundaries)

Hi Archer,

If you are using DM36x H264 encoder, generated bitstream should not have any syntax error. Can you please conform you used above config param to generate the test.264 stream which you have sent to me? because in config CABAC is off but in stream CABAC is on.

One simple step is test decoder is use testapp provided with codec package and run it for non-error bitstream. Conform the stream by opening it any analyzer, and elcard player will not show any error please use other analyzers.

Thanks,

Veeranna

Hi Veeranna,

I did use analyzers to open the test H.264 bitstream not player. (And the test stream could be played in VLC well.)

Now, I change the encoder's parameter EntropyCodingMode (Entropy Coding Mode (0 = CAVLC, 1 = CABAC)) to 1, 

the bitstream encoded by it could be decode by DM36x decoder! But still, I donnot know the why!

Hope you would like to give more detail about the problem!

Thanks and regards.

Archer

Hi Archer,

You mean you are able decode the stream generated by TI's DM36x H264 encoder.  the stream test.264 which you sent to me has error, not sure you generated this using TI encoder or while storing some corruption happens. TI encoder will not generate stream with errors. Please share encoder config params and stream for both cases(one with error and other is without error decoded by decoder).

Thanks,

Veeranna

Hi Veeranna,

This is the 'good' stream file I can decode,

0714.a-good-stream.rar

the '5224.test.rar' is the bit-stream I cannot decode, and the config I also supply above.

Entorpycode=1 -> the bit-stream I can decode

Entorpycode=0 -> the tough one I cannot decode

Thanks and good day!

Archer

Hi Veeranna,

CABAC is on?!

I check it.

Thanks and good day.

Archer