Re: [Opensvcdecoder-support] SNR and spacial scaling not workig in OSVCD using my SVC videos

[Médéric B. <mbl...@gm...>]

Hi,

Switching of spatial or quality layer is only occuring on IDR frames.
Does your stream contain IDR frames?


Médéric



2013/4/29 Yahia Benmoussa <yah...@gm...>

> Hi all,
>
> I've coded  SVC videos using JSVM but OSVCD is not able to switch to the
> contained  spacial and SNR layers. The switching to temporal layer works
> fine.
>
> The SNR and the spacial scalability works fine when using the test
> sequences in (
> http://sourceforge.net/projects/opensvcdecoder/files/Video%20Streams/).
>
> Some parameters may be wrong in my JSVM configuration files. Here an
> example of a SNR scalability in my SVC file.
>
>
> JSVM 9.19.15 BitStream Extractor
> Contained Layers:
> ====================
>
>        Layer   Resolution   Framerate   Bitrate MinBitrate      DTQ
>          0     352x288       1.8750     219.20      219.20   (0,0,0)
>          1     352x288       3.7500     238.30      238.30   (0,1,0)
>          2     352x288       7.5000     264.90      264.90   (0,2,0)
>          3     352x288      15.0000     293.70     293.70   (0,3,0)
>          4     352x288      30.0000     320.10     320.10   (0,4,0)
>          5     352x288       1.8750    1072.20                   (0,0,1)
>          6     352x288       3.7500    1492.20                   (0,1,1)
>          7     352x288       7.5000    2215.00                   (0,2,1)
>          8     352x288      15.0000    3401.00                  (0,3,1)
>          9     352x288      30.0000    5019.00                  (0,4,1)
>
>
> The used configuration files are :
>
>  *main.cfg :*
>
> OutputFile              mobile.264   # Bitstream file
> FrameRate               30.0       # Maximum frame rate [Hz]
> FramesToBeEncoded       300      # Number of frames (at input frame rate)
> GOPSize                 16        # GOP Size (at maximum frame rate)
> BaseLayerMode           1          # Base layer mode (0,1: AVC compatible,
> IntraPeriod             32                      #                    2:
> AVC w subseq SEI)
> NumberReferenceFrames   8
> LoopFilterDisable       1
> InterLayerLoopFilterDisable 1
> CgsSnrRefinement        1          # SNR refinement as 1: MGS; 0: CGS
> EncodeKeyPictures       1          # Key pics at T=0 (0:none, 1:MGS, 2:all)
> #MGSControl              2          # ME/MC for non-key pictures in MGS
> layers
>                                    # (0:std, 1:ME with EL, 2:ME+MC with EL)
> SearchMode              4          # Search mode (0:BlockSearch,
> 4:FastSearch)
> SearchRange             32         # Search range (Full Pel)
> NumLayers               2          # Number of layers
> LayerCfg                layer0.cfg # Layer configuration file
> LayerCfg                layer1.cfg # Layer configuration file
>
> *layer0.cfg : *
>
> InputFile            ../mobile.cif.yuv  # Input  file
> SourceWidth          352            # Input  frame width
> SourceHeight         288            # Input  frame height
> FrameRateIn          30             # Input  frame rate [Hz]
> FrameRateOut         30             # Output frame rate [Hz]
> MGSVectorMode        0              # MGS vector usage selection
>
> *layer1.cfg*
>
> InputFile            ../mobile.cif.yuv  # Input  file
> SourceWidth          352            # Input  frame width
> SourceHeight         288            # Input  frame height
> FrameRateIn          30             # Input  frame rate [Hz]
> FrameRateOut         30             # Output frame rate [Hz]
> InterLayerPred       1              # Inter-layer Prediction (0: no, 1:
> yes, 2:adaptive)
> MGSVectorMode        0              # MGS vector usage selection
>
> Thanks in advance.
>
> Yahia
>
>
>
>
>
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