[Cin] mpeg2sd422p presets

[Terje J. Hanssen]

Attached here are two presets for recording SD raw video to mpeg2video 
with high 30M bitrate and 422p chroma subsampling.
Just a quick working test by me so far.

A m2ts (mpegts) container is used as for the previous hd variant, to 
easy be able to combine with pcm_bluray audio. As progressive video, 
none of these are Blu-ray compliant, but merely for use with 
media-players. My thought next is therefore to  make additional .mkv 
variants of both presets.

Analyzing the Cingg output file with ffprobe:

ffprobe -hide_banner mpeg2sd422p.m2ts
Input #0, mpegts, from 'mpeg2sd422p.m2ts':
   Duration: 00:00:20.94, start: 0.020000, bitrate: 33509 kb/s
   Program 1
   Stream #0:0[0x1011]: Video: mpeg2video (4:2:2) ([2][0][0][0] / 
0x0002), yuv422p(tv, bt709/unknown/unknown, progressive), 720x576 [SAR 
1:1 DAR 5:4], 50 fps, 50 tbr, 90k tbn
       Side data:
         cpb: bitrate max/min/avg: 30000000/0/0 buffer size: 25001984 
vbv_delay: N/A
   Stream #0:1[0x1100](eng): Audio: pcm_bluray ([128][0][0][0] / 
0x0080), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s


The 422p at ML for SD is accepted by the equivalent fmpeg command line, and 
profile=422p works (not 'main') in the preset. It would be fine to use 
both profile name and level in the preset if possible (?) ('high' was 
used in for the hd variant).

cat mpeg2sd422p.m2ts

    mpegts mpeg2video
    cin_pix_fmt=yuv422p
    b=30M
    dc=10
    muxrate=35M
    minrate=30M
    maxrate=30M
    bufsize=25M
    bf=2
    profile=422p
    refs=1


cat mpeg2sd422p.seg

    segment mpeg2video
    segment_format=mpegts
    segment_time=00:10 <= your segment time
    reset_timestamps=1
    cin_pix_fmt=yuv422p
    b=30M
    dc=10
    muxrate=35M
    minrate=30M
    maxrate=30M
    bufsize=25M
    bf=2
    profile=422p
    refs=1

.
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segment mpeg2video
segment_format=mpegts
segment_time=00:10 <= your segment time
reset_timestamps=1
cin_pix_fmt=yuv422p
b=30M
dc=10
muxrate=35M
minrate=30M
maxrate=30M
bufsize=25M
bf=2
profile=422p
refs=1
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