dm368 h.264编解码效果差如何更改参数设置

cheng_xyd

Prodigy 140 points

大家好，我用DM368做的H.264编解码器，1920X 1080 ,解码后颜色失真厉害，可以通过参数调整吗？具体效果及参数设置见附件。

h.264配置参数.rar

11 年多前

0 Chris Meng 11 年多前

TI__Guru**** 155073 points

你好，

为什么你的maxbitrate和targetbitrate都是0？

0 cheng_xyd 11 年多前回复 Chris Meng

Prodigy 140 points

您好，这两个好像没有影响，设成2000000，效果是一样的。

0 Chris Meng 11 年多前回复 cheng_xyd

TI__Guru**** 155073 points

你好，

你希望是恒定码率还是可变码率？你目前码率控制设置为无。

请参考http://processors.wiki.ti.com/index.php/DM36x_Rate_Control_Modes。你能否参考IPNC里面的的codec配置，或者是codec库包里面的例子的参数配置？

0 cheng_xyd 11 年多前回复 Chris Meng

Prodigy 140 points

您好，现在就是可变速率；如果我想增加颜色的对比度、增加边缘的锐度需要更改哪些参数？

0 cheng_xyd 11 年多前回复 cheng_xyd

Prodigy 140 points

您好，例如第一个字“星”本来是红色字体，编码后变成一半红色，一半黑色，是什么原因，如何调整？

0 Chris Meng 11 年多前回复 cheng_xyd

TI__Guru**** 155073 points

你好，

请问你使用的h264enc编码器的版本是多少?

你提供的参数里面有encParams.rateControlPreset=4

xdais工具包里面的ividoe.h

typedef enum {
    IVIDEO_LOW_DELAY = 1,   /**< CBR rate control for video conferencing. */
    IVIDEO_STORAGE = 2,     /**< VBR rate control for local storage (DVD)
                             *   recording.
                             */
    IVIDEO_TWOPASS = 3,     /**< Two pass rate control for non real time
                             *   applications.
                             */
    IVIDEO_NONE = 4,        /**< No configurable video rate control
                              * mechanism.
                              */
    IVIDEO_USER_DEFINED = 5,/**< User defined configuration using extended
                             *   parameters.
                             */

/** Default setting. */
IVIDEO_RATECONTROLPRESET_DEFAULT = IVIDEO_LOW_DELAY
} IVIDEO_RateControlPreset;

0 cheng_xyd 11 年多前回复 Chris Meng

Prodigy 140 points

您好，我就是选的IVIDEO_NONE,现在格式为CVBR，效果没有变化。必须要用2吗？

0 cheng_xyd 11 年多前回复 cheng_xyd

Prodigy 140 points

现在的参数，显示效果没有变化。

-encParams.size = 124

-encParams.encodingPreset = 1

-encParams.rateControlPreset = 4

-encParams.maxHeight = 1088

-encParams.maxWidth = 1920

-encParams.maxFrameRate = 30000

-encParams.maxBitRate = 0

-encParams.dataEndianness = 1

-encParams.maxInterFrameInterval = 0

-encParams.inputChromaFormat = 9

-encParams.inputContentType = 0

-encParams.reconChromaFormat = 9

============================================================

-encDynParams.size = 212

-encDynParams.inputHeight = 1080

-encDynParams.inputWidth = 1920

-encDynParams.refFrameRate = 30000

-encDynParams.targetFrameRate = 30000

-encDynParams.targetBitRate = 0

-encDynParams.intraFrameInterval = 30

-encDynParams.generateHeader = 0

-encDynParams.captureWidth = 0

-encDynParams.forceFrame = 0

-encDynParams.interFrameInterval = 0

-encDynParams.mbDataFlag = 0

============================================================

-extParams.profileIdc = 100

-extParams.levelIdc = 50

-extParams.Log2MaxFrameNumMinus4 = 0

-extParams.ConstraintSetFlag = 0

-extParams.entropyMode = 1

-extParams.transform8x8FlagIntraFrame = 1

-extParams.transform8x8FlagInterFrame = 0

-extParams.enableVUIparams = 0

-extParams.meAlgo = 1

-extParams.seqScalingFlag = 1

-extParams.encQuality = 2

-extParams.enableARM926Tcm = 0

-extParams.enableDDRbuff = 0

-extParams.sliceMode = 3

-extParams.numTemporalLayers = 0

-extParams.svcSyntaxEnable = 0

-extParams.EnableLongTermFrame = 0

-extParams.outputDataMode = 1

-extParams.sliceFormat = 1

============================================================

-extDynParams.sliceSize = 0

-extDynParams.airRate = 0

-extDynParams.intraFrameQP = 0

-extDynParams.interPFrameQP = 0

-extDynParams.initQ = -1

-extDynParams.rcQMax = 44

-extDynParams.rcQMin = 8

-extDynParams.rcQMaxI = 44

-extDynParams.rcQMinI = 8

-extDynParams.rcAlgo = 3

-extDynParams.maxDelay = 0

-extDynParams.aspectRatioX = 0

-extDynParams.aspectRatioY = 0

-extDynParams.lfDisableIdc = 0

-extDynParams.enableBufSEI = 0

-extDynParams.enablePicTimSEI = 0

-extDynParams.perceptualRC = 0

-extDynParams.idrFrameInterval = 30

-extDynParams.mvSADoutFlag = 0

-extDynParams.resetHDVICPeveryFrame = 0

-extDynParams.enableROI = 0

-extDynParams.metaDataGenerateConsume = 0

-extDynParams.maxBitrateCVBR = 0

-extDynParams.interlaceRefMode = 0

-extDynParams.enableGDR = 0

-extDynParams.GDRduration = 0

-extDynParams.GDRinterval = 0

-extDynParams.LongTermRefreshInterval = 0

-extDynParams.UseLongTermFrame = 0

-extDynParams.SetLongTermFrame = 0

-extDynParams.VUI_Buffer = 57d794

-extDynParams.CustomScaleMatrix_Buffer = 0

-extDynParams.CVBRsensitivity = 0

-extDynParams.CVBRminbitrate = 0

-extDynParams.LBRmaxpicsize = 0

-extDynParams.LBRminpicsize = 0

-extDynParams.LBRskipcontrol = 0

-extDynParams.maxHighCmpxIntCVBR = 0

-extDynParams.disableMVDCostFactor = 0

-extDynParams.putDataGetSpaceFxn = 0

-extDynParams.dataSyncHandle = 0

0 cheng_xyd 11 年多前回复 cheng_xyd

Prodigy 140 points

请问VUI参数和CustomScaleMatrix参数起什么作用？

0 Chris Meng 11 年多前回复 cheng_xyd

TI__Guru**** 155073 points

你好，

你目前的配置仍然是 -encParams.rateControlPreset = 4。

请问你的代码是基于dvsdk还是IPNC。我们软件的默认配置应该都没有太大的问题。

0 cheng_xyd 11 年多前回复 Chris Meng

Prodigy 140 points

您好，代码是基于DVSDK，线路板为自制。

0 cheng_xyd 11 年多前回复 cheng_xyd

Prodigy 140 points

您好，需要配置VUI吗？

0 cheng_xyd 11 年多前回复 cheng_xyd

Prodigy 140 points

-encParams.size = 124

-encParams.encodingPreset = 1

-encParams.rateControlPreset = 2

-encParams.maxHeight = 1088

-encParams.maxWidth = 1920

-encParams.maxFrameRate = 30000

-encParams.maxBitRate = 50000000

-encParams.dataEndianness = 1

-encParams.maxInterFrameInterval = 1

-encParams.inputChromaFormat = 9

-encParams.inputContentType = 0

-encParams.reconChromaFormat = 9

============================================================

-encDynParams.size = 212

-encDynParams.inputHeight = 1088

-encDynParams.inputWidth = 1920

-encDynParams.refFrameRate = 30000

-encDynParams.targetFrameRate = 30000

-encDynParams.targetBitRate = 50000000

-encDynParams.intraFrameInterval = 30

-encDynParams.generateHeader = 0

-encDynParams.captureWidth = 0

-encDynParams.forceFrame = 0

-encDynParams.interFrameInterval = 0

-encDynParams.mbDataFlag = 0

============================================================

-extParams.profileIdc = 100

-extParams.levelIdc = 40

-extParams.Log2MaxFrameNumMinus4 = 0

-extParams.ConstraintSetFlag = 0

-extParams.entropyMode = 1

-extParams.transform8x8FlagIntraFrame = 1

-extParams.transform8x8FlagInterFrame = 0

-extParams.enableVUIparams = 1

-extParams.meAlgo = 0

-extParams.seqScalingFlag = 1

-extParams.encQuality = 2

-extParams.enableARM926Tcm = 0

-extParams.enableDDRbuff = 0

-extParams.sliceMode = 0

-extParams.numTemporalLayers = 0

-extParams.svcSyntaxEnable = 0

-extParams.EnableLongTermFrame = 0

-extParams.outputDataMode = 1

-extParams.sliceFormat = 1

============================================================

-extDynParams.sliceSize = 0

-extDynParams.airRate = 0

-extDynParams.intraFrameQP = 20

-extDynParams.interPFrameQP = 20

-extDynParams.initQ = 1

-extDynParams.rcQMax = 1

-extDynParams.rcQMin = 0

-extDynParams.rcQMaxI = 1

-extDynParams.rcQMinI = 0

-extDynParams.rcAlgo = 3

-extDynParams.maxDelay = 0

-extDynParams.aspectRatioX = 0

-extDynParams.aspectRatioY = 0

-extDynParams.lfDisableIdc = 0

-extDynParams.enableBufSEI = 0

-extDynParams.enablePicTimSEI = 0

-extDynParams.perceptualRC = 0

-extDynParams.idrFrameInterval = 30

-extDynParams.mvSADoutFlag = 0

-extDynParams.resetHDVICPeveryFrame = 0

-extDynParams.enableROI = 0

-extDynParams.metaDataGenerateConsume = 0

-extDynParams.maxBitrateCVBR = 0

-extDynParams.interlaceRefMode = 0

-extDynParams.enableGDR = 0

-extDynParams.GDRduration = 0

-extDynParams.GDRinterval = 0

-extDynParams.LongTermRefreshInterval = 0

-extDynParams.UseLongTermFrame = 0

-extDynParams.SetLongTermFrame = 0

-extDynParams.VUI_Buffer = 57d794

-extDynParams.CustomScaleMatrix_Buffer = 0

-extDynParams.CVBRsensitivity = 0

-extDynParams.CVBRminbitrate = 0

-extDynParams.LBRmaxpicsize = 0

-extDynParams.LBRminpicsize = 0

-extDynParams.LBRskipcontrol = 0

-extDynParams.maxHighCmpxIntCVBR = 0

-extDynParams.disableMVDCostFactor = 0

-extDynParams.putDataGetSpaceFxn = 0

-extDynParams.dataSyncHandle = 0

============================================================

-extVUIParams.aspectRatioInfoPresentFlag = 1

-extVUIParams.overscanInfoPresentFlag = 1

-extVUIParams.overscanAppropriateFlag = 0

-extVUIParams.videoSignalTypePresentFlag = 1

-extVUIParams.videoFormat = 2

-extVUIParams.pixelRange = 1

-extVUIParams.colourDescriptionPresentFlag = 1

-extVUIParams.colourPrimaries = 2

-extVUIParams.transferCharacteristics = 2

-extVUIParams.matrixCoefficients = 2

-extVUIParams.timingInfoPresentFlag = 1

-extVUIParams.numUnitsInTicks = 1

-extVUIParams.timeScale = 150

-extVUIParams.fixedFrameRateFlag = 0

-extVUIParams.nalHrdParameterspresentFlag = 1

-extVUIParams.picStructPresentFlag = 0

-extVUIParams.bitstreamRestrictionFlag = 1

您好，改成可变速率参数如上，画面品质没有改进；但通过更改QP值可以降低画面品质。有方法再增加画面品质吗？

0 Louis 11 年多前回复 cheng_xyd

TI__Genius 12210 points

看下面的帖子是否有帮助：

http://e2e.ti.com/support/embedded/multimedia_software_codecs/f/356/p/227798/803332.aspx#803332

http://processors.wiki.ti.com/index.php/DM36x_H.264_encoder_FAQ

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dm368 h.264编解码效果差如何更改参数设置