Search found 175 matches

by Sharc
Sun Sep 24, 2017 6:19 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

Eventually coming back to the original question, it seems that the usual method for 25p -> 29.97i conversion (hard-telecining) is simply

Code: Select all

changefps(59.94)
separatefields()
selectevery(4,0,3)   #selectevery(4,1,2) for alternate field order
weave()
by Sharc
Sat Sep 23, 2017 5:36 am
Forum: General Discussion
Topic: [RESOLVED] Update on your latest paper please
Replies: 37
Views: 1135

Re: [RESOLVED] Update on your latest paper please

Hi Donald
Congratulations for the finalization and acceptance of your paper!

Any plans already about resuming your video/CUDA activities? ;)
by Sharc
Tue Jul 11, 2017 3:40 pm
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

No. It is NOT a spec. As the title says, it is just a White Paper (a tutorial if you like). That makes a huge difference.
I don't have access to the Blu-Ray spec. but I think to remember that it is a document of more than 1000 pages.
by Sharc
Tue Jul 04, 2017 6:26 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

Finally (!) I found the document which made me believe that not all Blu-Ray players support 25 fps ("PAL"), and converting 25 to 29.97 ("NTSC") might still be advisable to be on the safe side, even in the global Blu-Ray age. Search for example for "50Hz" in the document here (e.g. Para. 3.3.1, 3.3.2...
by Sharc
Sat Jul 01, 2017 4:25 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

Doing some more research, I am not really convinced that 25/50fps support for Blu-ray is "mandatory in PAL regions only". It seems to be a quote from the "Blu-ray Demystified" book only, which is NOT a standard. But nevertheless, I would also recommended to avoid 'NTSC editions' of converted 25 fps ...
by Sharc
Sat Jul 01, 2017 2:35 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

Unless you have to target DVD-Video as your output format, I don't think there's any reason to do any of this anymore. HDTVs support all framerates regardless of region, so if you have a Blu-ray player, you can just leave the video as 25 fps and burn it to a DVD-R in a MP4 or MKV container and play...
by Sharc
Fri Jun 30, 2017 9:46 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

Hard-telecine 6/5 was exactly my concern. I'll run an encode and report back how it behaves .... Edit: Here some results: PC: The 12/10 telecined stream can be perfectly IVTCed with script+PC, as expected. Audio adjustment is minimum 24.75/25=0.99 (1% slowdown only, same as mentioned by Aleron Ives ...
by Sharc
Fri Jun 30, 2017 8:41 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

Shouldn't this be Video = SelectEvery (Video, 8, 0,1, 2,3,2, 5,4 , 7,6,7) in order not to break the Top-Bottom sequence? Seems you are correct. Well spotted! This is giving a ratio of 10 output fields per 8 input fields. That converts 25 to 31.25. Why wouldn't they use a correct ratio such as 12 pe...
by Sharc
Fri Jun 30, 2017 7:41 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

Yes, I am familiar with the usual film-to-PAL (24 => 25) DVD speedup and pitch shift issues. (The speedup can be a godsend for certain movies, when it's a relief to finish watching a couple of minutes earlier...... ;) ) . Pitch shift can be an annoyance though with concert DVDs, especially for the f...
by Sharc
Wed Jun 28, 2017 4:28 am
Forum: General Discussion
Topic: PAL to NTSC telecining
Replies: 26
Views: 834

Re: PAL to NTSC telecining

I tried the frame repeats option as well to minimize audio pitch shift. Although the judder is less for 6/5 (24.975=>29.97) than it would be for 5/4 (23.976=>29.97) it's still noticable for "PAL spoiled viewers" when playing it at 29.97. Possibly some smart HW players/TVs can restore the progressive...