[Cin] dvdcreate and filempeg patches

[Terje J. Hanssen]

Den 09.06.2023 16:40, skrev Phyllis Smith:
> It is good the way you have it.  Before the patch, when progressive 
> media was input and the Deinterlace box was NOT checked, "mediainfo" 
> always displayed "Interlaced, Top Field First".  Mediainfo is not 
> always 100%.
>

Phyllis;
In comparision, how is the video detected with
ffmpeg  -filter:v idet

http://www.aktau.be/2013/09/22/detecting-interlaced-video-with-ffmpeg/



> On Fri, Jun 9, 2023 at 8:12 AM Andrew Randrianasulu 
> <randrianasulu at gmail.com> wrote:
>
>
>
>     пт, 9 июн. 2023 г., 15:43 Andrew Randrianasulu
>     <randrianasulu at gmail.com>:
>
>
>
>         чт, 8 июн. 2023 г., 21:43 Phyllis Smith <phylsmith2017 at gmail.com>:
>
>             Andrew, after many, many runs and actual DVD media
>             creation with these patches in, I am almost certain that
>             all is working well and now there is the choice of
>             creating BFF media.  So answer to question of "do you
>             still get interlaced" is "YES" as far as I can tell.  Here
>             are some of the results / differences seen when use
>             "mediainfo":
>
>             1) GOP, Open/Closed                         : Open   
>             -------------------> Before
>                GOP, Open/Closed of first frame     : Closed
>             -------------------> Before
>                GOP, Open/Closed                          : Closed
>             -------------------> After is just this 1 line which makes
>             sense
>             2) Scan type    is a little confusing though:
>                 Before -----> it always read Interlaced for all,
>             whether or not the Deinterlace box was checked or not
>                 After ------> if Deinterlace box is checked, it reads
>             Interlace
>
>
>         I think it should be set to Progressive if deinterlace checked
>         ....
>
>         Sorry, back to double-checking my logic ..
>
>
>     It seems with m2ts source and deinterlace on I get this mpeg2enc line:
>
>     Running
>     /data/data/com.termux/files/home/cinelerra/cinelerra-5.1/bin//mpeg2enc
>     -v 0  -b 8000 -q 1 -a 2 -F 3 -H -c -I 0 -M 8 -f 8 -g 15 -G 15 -R 0
>     -o '/data/data/com.termux/files/home/tmp/dvd_20230609-161131/dvd.m2v'
>
>     no "-z" , also "I"  equals zero
>
>     but mediainfo still says:
>
>     Scan type                                : Progressive           
>                   Scan order                    : Top Field First
>
>     yet ffprobe says
>
>     Input #0, mpegvideo, from
>     '/data/data/com.termux/files/home/tmp/dvd_20230609-161131/dvd.m2v':
>           Duration: N/A, bitrate: N/A      Stream #0:0: Video:
>     mpeg2video (Main), yuv420p(tv, bt470bg, progressive), 720x576 [SAR
>     16:15 DAR 4:3], 25 fps, 25 tbr, 1200k tbn                        
>                               Side data:                              
>            cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 1835008
>     vbv_delay: N/A
>
>     I was dumb I selected pal 4:3 instead of pal 16:9 in dvd master ....
>
>     So, may be this is bug (o-feature) in mediainfo?
>
>     Anyway, those parameters can be changed if you click on wrench
>     icon on video (mpeg) stream in second-stage window where batch
>     files already set up.
>
>
>
>
>                 After ------> if Deinterlace box is NOT checked, it
>             reads Interlace IF input is interlaced BUT Progressive if
>             input media is not interlaced.
>             Does the above make sense?  (I think I stated it correctly).
>
>             In the DVD media I tested on a really old non-digital TV
>             with a DVD player, the BFF media looked about the same as
>             the TFF media, even when original media was BFF or TFF.  
>             But the old TV was so bad looking, that I am not sure it
>             was a good test.
>
>             Playing Interlaced DVD media on a new digital TV with a
>             DVD player, looked decent but that is probably due to the
>             software in the digital TV.
>
>             Playing DVD media on a new digital TV where the original
>             input was interlaced and CinGG had the Deinterlace box
>             checked, did result in some small jagged areas but mostly
>             visible only when stop or step.
>
>             RECOMMENDATION: if not editing the input media so you do
>             not need an NLE, i.e. CinGG, probably should refer to
>             ffmpeg, dvdauthor, or those forums that apply direct
>             copies of media exclusively for creating DVDs.
>
>
>
>
>
>             On Mon, Jun 5, 2023 at 5:49 PM Phyllis Smith
>             <phylsmith2017 at gmail.com> wrote:
>
>
>                     Can you clarify even with my patches AND
>                     deinterlacing checkbox set in dvd creation window
>                     and "use ffmpeg" unchecked you still get interlaced?
>
>                 Confusing results that I did not consider. I will
>                 thoroughly investigate "before and after" tomorrow and
>                 let you know what is happening. (I should have done
>                 this earlier).
>
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