[Cin] mpeg2sd422p presets

[Terje J. Hanssen]

Here is how I test the seg format:

Shift-P | Recording

    FFMPEG: seg
    Audio wrench: mkv_lpcm.seg
    Video wrench: mpeg2sd422p_mkv.seg


r(ecord)

    Path:/home/terje/Videos/Record_mpeg2sd422p_%02d.mkv
    Start record ..........
    Stop record

Then the following segment files are stored

du -sh Record*

    7,5M Record_mpeg2sd422p_00.mkv
    7,3M    Record_mpeg2sd422p_01.mkv
    7,3M    Record_mpeg2sd422p_02.mkv
    8,2M    Record_mpeg2sd422p_03.mkv
    7,3M    Record_mpeg2sd422p_04.mkv
    7,3M    Record_mpeg2sd422p_05.mkv
    8,2M    Record_mpeg2sd422p_06.mkv
    7,3M    Record_mpeg2sd422p_07.mkv
    ..........


ffprobe -hide_banner Record_mpeg2sd422p_00.mkv
Input #0, matroska,webm, from 'Record_mpeg2sd422p_00.mkv':
   Metadata:
     ENCODER         : Lavf61.1.100
   Duration: 00:00:02.31, start: 0.020000, bitrate: 26865 kb/s
   Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, 
bt709/unknown/unknown, progressive), 720x576 [SAR 1:1 DAR 5:4], 50 fps, 
50 tbr, 1k tbn
       Metadata:
         DURATION        : 00:00:02.180000000
       Side data:
         cpb: bitrate max/min/avg: 30000000/0/0 buffer size: 25001984 
vbv_delay: N/A
   Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
       Metadata:
         DURATION        : 00:00:02.311000000


The video and audio duration is not exactly identical

I am not sure that changing the segment time in the presets work 
correctly, because at least in my test the file sizes didn't change much(?)


On 20.06.2025 20:49, Phyllis Smith wrote:
> Successfully used both of these new render formats: mpeg2sd422p.mkv 
> and mpeg2sd422p.m2ts.
> But I have not found a good/clean way to use any of the xxxx.seg 
> formats yet which can be easily documented and used so holding off on 
> those still.  Thanks, Terje (and Andrew).
>
> On Sun, Jun 15, 2025 at 5:06 AM Terje J. Hanssen via Cin 
> <cin at lists.cinelerra-gg.org> wrote:
>
>     Attach the  mkv (draft) presetg versions:
>
>     cat mpeg2sd422p.mkv
>     matroska mpeg2video
>          cin_pix_fmt=yuv422p
>          b=30M
>          muxrate=35M
>          minrate=30M
>          maxrate=30M
>          bufsize=25M
>          profile=422p
>
>     cat mpeg2sd422p_mkv.seg
>     segment mpeg2video
>          segment_format=matroska
>          segment_time=00:10 <= your segment time
>          reset_timestamps=1
>          cin_pix_fmt=yuv422p
>          b=30M
>          muxrate=35M
>          minrate=30M
>          maxrate=30M
>          bufsize=25M
>          profile=422p
>
>     cat mkv_lpcm.seg
>     segment pcm_s16le
>     segment_format=matroska
>     segment_time=00:10 <= your segment time
>     reset_timestamps=1
>     id 0x1100
>
>     -------------
>
>     ffprobe -hide_banner cgg_mpeg2sd422p.mkv
>     Input #0, matroska,webm, from 'cgg_mpeg2sd422p.mkv':
>        Metadata:
>          ENCODER         : Lavf61.1.100
>        Duration: 00:00:09.84, start: 0.000000, bitrate: 30898 kb/s
>        Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv,
>     bt709/unknown/unknown, progressive), 720x576 [SAR 1:1 DAR 5:4], 50
>     fps,
>     50 tbr, 1k tbn
>            Metadata:
>              DURATION        : 00:00:09.840000000
>            Side data:
>              cpb: bitrate max/min/avg: 30000000/0/0 buffer size: 25001984
>     vbv_delay: N/A
>        Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, 2 channels, s16,
>     1536 kb/s
>            Metadata:
>              DURATION        : 00:00:09.791000000
>
>     ----------
>
>     ffprobe -hide_banner cgg_mpeg2sd422p_03.mkv
>     Input #0, matroska,webm, from 'cgg_mpeg2sd422p_03.mkv':
>        Metadata:
>          ENCODER         : Lavf61.1.100
>        Duration: 00:00:08.18, start: 6.010000, bitrate: 8025 kb/s
>        Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv,
>     bt709/unknown/unknown, progressive), 720x576 [SAR 1:1 DAR 5:4], 50
>     fps,
>     50 tbr, 1k tbn
>            Metadata:
>              DURATION        : 00:00:08.180000000
>            Side data:
>              cpb: bitrate max/min/avg: 30000000/0/0 buffer size: 25001984
>     vbv_delay: N/A
>        Stream #0:1(eng): Audio: mp2, 48000 Hz, stereo, s16p, 384 kb/s
>            Metadata:
>              DURATION        : 00:00:08.180000000
>
>
>
>
>     -- 
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>     Cin at lists.cinelerra-gg.org
>     https://lists.cinelerra-gg.org/mailman/listinfo/cin
>
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