Latest post Tue, Aug 6 2019 11:20 AM by Gregoire Cutzach. 4 replies.
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  • Wed, Jun 26 2019 6:39 PM

    AMT3 authorized pixel Formats

    Trying to work with uncompressed streams as input of AMT3 we have some questions.

     

    In the MediaAssetDescription file we can see as valid values :

    <xs:simpleType name="ComponentOrderType">

            <xs:restriction base="xs:string">

                <xs:enumeration value="Unknown"/>

                <xs:enumeration value="ABGR 4444"/>

                <xs:enumeration value="ARGB 4444"/>

                <xs:enumeration value="BGRA 4444"/>

                <xs:enumeration value="RGBA 4444"/>

                <xs:enumeration value="RGB 4440"/>

                <xs:enumeration value="BGR 4440"/>

                <xs:enumeration value="UYVY 4220"/>

                <xs:enumeration value="YUYV 4220"/>

            </xs:restriction>

        </xs:simpleType>

        <!-- -->

        <!-- -->

        <xs:simpleType name="ComponentTypeType">

            <xs:restriction base="xs:string">

                <xs:enumeration value="Unknown"/>

                <xs:enumeration value="8 bit"/>

                <xs:enumeration value="unsigned short 10:6"/>

                <xs:enumeration value="short 2:14"/>

                <xs:enumeration value="short"/>

                <xs:enumeration value="float"/>

                <xs:enumeration value="v210"/>

            </xs:restriction>

       </xs:simpleType>

     

    Can you confirm that unsigned short 10:6 corresponds to 10bit little endian ?

    Can you confirm that short 2:14 corresponds to 14bit big endian ?

    What is the usecase of short and float ?

     

    With the previous available values, is it possible to describe yuv422p10le or yuv422p10be inputs ?

     

    We are able to make working some transcoding jobs with uncompress as source. Like 1920x1080 uncompressed 422/8bits inputs to XDCAM-HD 50 target.

    But it seems that some "Picture strategy" are not possible.

    Does a list of authorized picture strategies exists ?

    For example, whatever pixel format is given as input (uyvy/8bit, RGB4440/unsigned short 10:6, ...), we are experiencing the following kind of errors.

     

    INFO - Starting picture strategy from 'Uncompressed, 25/1, 3840x2160, full frame, 16x9, color model YUV (Rec NotSet), UYVY 4220/unsigned short 10:6, Sampled Topness 1' to 'AVC-Intra 4:2:2 Unconstrained, 25/1, 3840x2160, full frame, 0x1, color model YUV (Rec NotSet), 4:2:2, 10bit, Sampled Topness 1'.

    INFO - Picture strategy resolved = 0.

    WARN - MediaProcessor executing hardAbort...

     

    Without the possibility to see if it's a problem of invalid pixel Format conversion or just an unsupported target.

    Are 3840x2160 XAVC-Intra 300 or 480 valid targets ?

     

    Thank you.

    Woody Technologies

  • Fri, Jun 28 2019 10:58 AM In reply to

    • andym
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    Re: AMT3 authorized pixel Formats

    Hi Gregor, we are reviewing your question and agree that we need to improve our documentation here. Upfront, here are the definitions of the different enums:

            kCT_Invalid,
            kCT_8Bit,        // 8 bits per component, no padding
            kCT_USHORT_4_12, // Unsigned short with 12 LSB bits carrying sample information
            kCT_USHORT_12_4, // Unsigned short with 12 MSB bits carrying sample information
            kCT_USHORT_10_6, // Unsigned short with 10 MSB bits carrying sample information
            kCT_SHORT_2_14,  // Normalized signed 16 bit with 14 bits fractional part
            kCT_SHORT,       // 16 bit
            kCT_HALFFLOAT,   // 16 bit half-float
            kCT_FLOAT,       // Float
            kCT_V210         // 10 bit V210 packing
    It is possible to describe a yuv 422 progressive 10bit format. Stand by also regarding your question of picture strategies, we are trying to come up with a way of documenting this.
    
    
    3840 x 2160 (UHDTV1) XAVC-I 300 or 480 are by all means valid targets.  For XAVC-I 300 and 480, all the operating points below are supported (class 480 is identical), for both 
    VBR and CBG encoding.
    
    
    
    
    XAVC 4K Intra Class 300   UHDTV1     23.98
    XAVC 4K Intra Class 300   UHDTV1     25
    XAVC 4K Intra Class 300   UHDTV1     29.97
    XAVC 4K Intra Class 300   UHDTV1     50
    XAVC 4K Intra Class 300   UHDTV1     59.94
    XAVC 4K Intra Class 300   4k     23.98
    XAVC 4K Intra Class 300   4k     24
    XAVC 4K Intra Class 300   4k     25
    XAVC 4K Intra Class 300   4k     29.97
    XAVC 4K Intra Class 300   4k     50
    XAVC 4K Intra Class 300   4k     59.94
    
    
    
    
    
  • Fri, Jun 28 2019 3:06 PM In reply to

    Re: AMT3 authorized pixel Formats

    Thanks a lot. 

    A lot of stuff to read and understand !

    Gregor

  • Fri, Jun 28 2019 4:07 PM In reply to

    Re: AMT3 authorized pixel Formats

    Hello Andy,

    I'm Grégoire, teammate of Gregor, partially in charge of AMT3 integration here at Woody Technologies.

    Thank you for your answer, but i still need a precision.

    When you say that "It is possible to describe a yuv 422 progressive 10bit format ", what are the good values for this PixelFormat description?

    Cause in actual .xsd for ComponentOrder only YUVU 4220 and UYVY 4220 are described. It seems that YUV xxx is not an option. (Not proposed in .xsd.)

     

    For now, what we have tried as pixel format values are:

    <mpmad:PixelFormat>

           <mpmad:ComponentOrder>UYVY 4220</mpmad:ComponentOrder>

           <mpmad:ComponentType>unsigned short 10:6</mpmad:ComponentType>

    </mpmad:PixelFormat>

    Because it seems to be the most matching values for the yuv 422 progressive 10bit rawvideo that we have in input.

    But it seems to fail and except pixel format i can't see what it's invalid in the Picture strategy and make it fail.

    INFO - Starting picture strategy from 'Uncompressed, 25/1, 3840x2160, full frame, 16x9, color model YUV (Rec NotSet), UYVY 4220/unsigned short 10:6, Sampled Topness 1' to 'AVC-Intra 4:2:2 Unconstrained, 25/1, 3840x2160, full frame, 0x1, color model YUV (Rec NotSet), 4:2:2, 10bit, Sampled Topness 1'.
    INFO - Picture strategy resolved = 0.
    WARN - MediaProcessor executing hardAbort...

    Is there for ComponentOrder like for Component Type, non documented valid options ? (Like YUV xxx ?) 

     

    Thank you for your time and your future answers.

  • Tue, Aug 6 2019 11:20 AM In reply to

    Re: AMT3 authorized pixel Formats

    Ok, Problem solved.

    I was working on outdated documentation.
    By the time XAVC-Intra 300 was a valid target now it have to be XAVC-Intra 300-CBG.

    As this valid value is not documented in EssenceInfo.xsd but only in IMediaAsset.h it takes some time to figure it out.

    And strangely the wrong value of target was not raised at all and Picture Strategy evaluation was made though it can only failed.

    This thread can be closed IMO.
    Grégoire

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