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Zheng_G_
Beginner
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Problems about the FrameType display

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Hi,

I intended to see the frame type (I,P,B,etc.) during the encoding stage by checking the "FrameType" as a member of "mfxBitstream" structer.

But it seemed that some of the FrameTypes were not the pre-defined values in "mfxstructurs.h", such as MFX_FRAMETYPE_I =0x0001.

As shown below in my test result, the GOP pattern can be specified actually (I P B B B B P B B B B).

PTS:      1  (0x00c1), DTS:      0
PTS:      6  (0x0042), DTS:      1
PTS:      2  (0x0004), DTS:      2
PTS:      3  (0x0004), DTS:      3
PTS:      4  (0x0004), DTS:      4
PTS:      5  (0x0004), DTS:      5
PTS:     11  (0x0042), DTS:      6
PTS:      7  (0x0004), DTS:      7
PTS:      8  (0x0004), DTS:      8
PTS:      9  (0x0004), DTS:      9
PTS:     10  (0x0004), DTS:     10
PTS:     16  (0x0042), DTS:     11

Any idea how the strange values came?

Thanks 

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1 Solution
OTorg
New Contributor II
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Go to the definition of MFX_FRAMETYPE_I and you'll see enum filled with MFX_FRAMETYPE_* flags. FrameType field holds combination of that flags. 0x00c1 = MFX_FRAMETYPE_I | MFX_FRAMETYPE_REF | MFX_FRAMETYPE_IDR, etc.

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OTorg
New Contributor II
44 Views

Go to the definition of MFX_FRAMETYPE_I and you'll see enum filled with MFX_FRAMETYPE_* flags. FrameType field holds combination of that flags. 0x00c1 = MFX_FRAMETYPE_I | MFX_FRAMETYPE_REF | MFX_FRAMETYPE_IDR, etc.

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