DirectShow中H.264 SourceFilter的Pin配置

对DirectShow SourceFilter，要在Pin上输出H.264码流，需要注意如下设置：

majortype: MEDIATYPE_Video {73646976-0000-0010-8000-00AA00389B71}

subtype: MEDIATYPE_AVC1 {31435641-0000-0010-8000-00AA00389B71}

FormatType要设置为FORMAT_MPEG2_VIDEO，对应的结构体为MPEG2VIDEOINFO

下面是一个分辨率为960x528的H.264 High Profile/Level 5.1视频例子

formattype: FORMAT_MPEG2_VIDEO {E06D80E3-DB46-11CF-B4D1-00805F6CBBEA}

bFixedSizeSamples: 0

bTemporalCompression: 0

lSampleSize: 1

cbFormat: 167

VIDEOINFOHEADER2:

rcSource: (0,0)-(0,0)

rcTarget: (0,0)-(0,0)

dwBitRate: 0

dwBitErrorRate: 0

AvgTimePerFrame: 417082

VIDEOINFOHEADER2:

dwInterlaceFlags: 0x00000000

dwCopyProtectFlags: 0x00000000

dwPictAspectRatioX: 20

dwPictAspectRatioY: 11

dwControlFlags: 0x00000000

dwReserved2: 0x00000000

BITMAPINFOHEADER:

biSize: 40

biWidth: 960

biHeight: 528

biPlanes: 1

biBitCount: 24

biCompression: avc1

biSizeImage: 0

biXPelsPerMeter: 1

biYPelsPerMeter: 1

biClrUsed: 0

biClrImportant: 0

MPEG2VIDEOINFO:

dwStartTimeCode: 0

cbSequenceHeader: 35 //dwSequenceHeader的长度

dwProfile:0x0000004d //high profile

dwLevel: 0x00000033 //0x33就是10禁止51，对应level 5.1

dwFlags: 0x00000004

dwSequenceHeader的格式：

[BigEndian格式的16位 SPS长度] + SPS + [[BigEndian格式的16位 PPS长度] +PPS

下面是完整的MPEG2VIDEOINFO结构体内容

pbFormat:

0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

0010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

0020: 00 00 00 00 00 00 00 00 3a 5d 06 00 00 00 00 00

0030: 00 00 00 00 00 00 00 00 14 00 00 00 0b 00 00 00

0040: 00 00 00 00 00 00 00 00 28 00 00 00 c0 03 00 00

0050: 10 02 00 00 01 00 18 00 61 76 63 31 00 00 00 00

0060: 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00

0070: 00 00 00 00 23 00 00 00 4d 00 00 00 33 00 00 00

0080: 04 00 00 00|00 1b 67 4d 40 33 96 64 07 80 87 7f

0090: e0 00 20 00 22 00 0c ba 76 02 62 5a 01 1e 30 65

00a0: 40 00 04 68 ee 3c 80