#1  
04-10-2018, 08:06 AM
ragu0012 ragu0012 is offline
Free Member
 
Join Date: May 2017
Posts: 94
Thanked 6 Times in 4 Posts
I think the answer to this question would be helpful for a lot of people.

I am having trouble "identifying" when video is telecine or pulldown. The only thing I go by is whether I know it was shot on film originally.

How do you tell just by looking at the video?

On these samples, the Mary Poppins clip is telecine - as Sanlyn has already pointed out. But what about this Blues Brothers clip?


Attached Files
File Type: avi Blues Brothers.avi (79.78 MB, 4 downloads)
File Type: avi Poppins.avi (78.90 MB, 11 downloads)
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Ads / Sponsors
 
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
04-10-2018, 02:11 PM
sanlyn sanlyn is offline
Premium Member
 
Join Date: Aug 2009
Location: N. Carolina and NY, USA
Posts: 3,648
Thanked 1,307 Times in 982 Posts
Blues Bros. is interlaced. Open the file in Virtualdub and apply the built-in yadif deinterlace filter set for double frame rate, top field first. Advanced the video one frame at a time with the navigation icons in the lower left corner. With the yadif filter turned on, the left-hand input frame will show each frame as-is, unaltered, the output frame will show each field in succession, one field at a time. With each click of the frame advance button the output pane during motion will show a different image (look at the hands when they move, or look at Balushi moving). The images will play in the output pane as A-B-C-D-E-F and so on. A different image with each click indicates that the video is interlaced.

A duplicate frame with two clicks in a row during motion would indicate progressive frames. This would play as A-A-B-B-C-C-D-D and so on.

A duplicate clip for more than two clicks in a row interspersed with a sequence of only two dupes in a row indicates some form of pulldown. A typical pulldown would play as A-A-B-B-C-C-C-D-D-D-E-E-F-F-G-G-H-H-H-I-I-I or something similarly weird. Pulldown schemes consist of progressive frames interspersed with frames that appear as interlaced.

Try the old Neuron2 hmtl page (now removed from the internet, for some strange reason) for clues about how to "read" frame structures. Neuron2_How To Analyze Video Frame Structure.zip.
Reply With Quote
The following users thank sanlyn for this useful post: ragu0012 (04-10-2018)
  #3  
04-10-2018, 02:21 PM
ragu0012 ragu0012 is offline
Free Member
 
Join Date: May 2017
Posts: 94
Thanked 6 Times in 4 Posts
THANK YOU Sanlyn. Exactly what I was looking for.
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Best scripts for de-telecine ragu0012 Restore, Filter, Improve Quality 8 03-17-2018 08:36 PM
Can some1 help me to identify my VHS graphic problem? harky Restore, Filter, Improve Quality 4 12-31-2016 08:50 AM
Identify mfg. date of Philips CD-R Towncivilian Blank Media 0 07-04-2015 03:42 PM
How to identify the dye used on a DVD media? gamemaniaco Blank Media 6 10-08-2013 09:25 AM
Can anyone identify this older program? volksjager Computers 12 04-13-2012 05:35 PM

Thread Tools



 
All times are GMT -5. The time now is 04:20 AM