Den 18.01.2024 20:05, skrev Andrea paz:

Thanks for the link to stackexchange. Reading this post and others
(also the discussion on ffmpeg from when they switched from PAR to
SAR) I think the formula:

"Yet, with DAR = SAR * PAR

HDV 1080i:   16/9 = (1440/1080) * (4/3) = 1.7778
HDV 1280p:  16/9 = (1280/720) * (1/1) = 1.7778"

is more correct to write it (for ffmpeg and CinGG):

DAR = Width/Height * SAR

that is, the (4/3) and the (1/1) are now the SAR and not the PAR.

So it is no longer spelled PAR, but always just W/H and SAR. SAR, at
this point, is a "pixel aspect ratio"
I tried changing the txt (version 4). Do you think it is okay? It is
likely to be wrong.

Well, I have prioritized more to understand what happends than interprete the somewhat ambiguous definitions.
(the order of the factors is indifferent).
https://stackoverflow.com/questions/18877243/why-ffmpeg-print-sar-instead-of-par

I think of SAR in the FFmpeg output as a correction factor for the recordered picture frame format resolution (Wp), to get the desired output display resolution (expanded Wd with square px) at a given DAR, (or in opposite order).

I found a useful table at ffmpeg-user that contains information for practically all SD and HD video formats.
Maybe something for the manual?
https://www.mail-archive.com/ffmpeg-user@ffmpeg.org/msg27522.html

              display     DAR       picture     PAR      SAR = DAR/PAR
            =========== ====     =========== ====     =====
16:9-2160: 3840 x 2160 16:9 : 3840 x 2160 16:9 :   1:1
4:3-2160: 2880 x 2160   4:3 : 2880 x 2160   4:3 :   1:1
16:9-1080: 1920 x 1080 16:9 : 1920 x 1080 16:9 :   1:1
4:3-1080: 1440 x 1080   4:3 : 1440 x 1080   4:3 :   1:1
16:9-576: 1024 x 576   16:9 :   720 x 576    5:4 : 64:45
4:3-576:   768 x 576    4:3 :   720 x 576    5:4 : 16:15
16:9-480:   853 x 480   16:9 :   720 x 480    3:2 : 32:27
4:3-480:   640 x 480    4:3 :   720 x 480    3:2 :   8:9

With FFprobe I have verified the Picure resolution, SAR and DAR for the PAL SD DV(D) and HDV formats I'm using:

ffprobe dv01_07.dv 2>&1 >/dev/null | grep Video
Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc

ffprobe dv07_05_wide_cingg.dv 2>&1 >/dev/null | grep Video
Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc

ffprobe dv_16x9_cingg_20240117.dv 2>&1 >/dev/null | grep Video
Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 64:45 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc

ffprobe dvd_16x9.mpg 2>&1 >/dev/null | grep Video
Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt709/unknown/unknown, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc

ffprobe hdv07_05.m2t 2>&1 >/dev/null | grep Video
Stream #0:0[0x810]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc

@Terje
For videos, can I ask you to do 2 and 3? I have never used and don't
really understand how DVD/BR works; and I haven't had players/burner
for a long time.

OK, I see there already is a lot stuff in the manual chpt 14. I would expect a video is something Phyllis could do, but I also know she is busy with a lot of work (?) I think I can contribute with some additional screenshots for HDV to a 16x19 DVD and BD. Andrew may possibly also add the procedure for a DVD video with LPCM(?)