removing a combined frame.

[fred3f]

I have an AVI file of an old and unavailable movie that is at 29.97 fps. On examining the I find that every 5th frame is a blended frame of the 4th and 1st in the next series of 5. It is not a duplicate frame but a duplicate of two frames combined. I tried to decimate it using Tdecimate. It would decimate to 23.976, but it wouldn't decimate the frame I wanted to decimate. So good frames were being decimated while the blended frame remained. I tried different modes with and without TFM to no avail. Is there a way to do this? Please explain clearly and don't assume I know a lot, because I am not that good at this and need to get the idiots version.

The film is called Dangerous to Know

Here is a mediainfo

General
Complete name : G:\completed torrents\Dangerous.to.Know. audio fixed 1938.XVID-cg.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 700 MiB
Duration : 1h 10mn
Overall bit rate : 1 393 Kbps
Writing application : VirtualDubMod 1.5.10.2 (build 2540/release)
Writing library : VirtualDubMod build 2540/release

Video
ID : 0
Format : MPEG-4 Visual
Format profile : AdvancedSimple@L5
Format settings, BVOP : Yes
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Custom
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 1h 10mn
Bit rate : 1 269 Kbps
Width : 560 pixels
Height : 416 pixels
Display aspect ratio : 4:3
Frame rate : 29.970 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.182
Stream size : 638 MiB (91%)
Writing library : XviD 1.2.1 (UTC 2008-12-04)

Audio
ID : 1
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Format_Settings_Mode : Joint stereo / MS Stereo
Codec ID : 55
Codec ID/Hint : MP3
Duration : 1h 10mn
Bit rate mode : Constant
Bit rate : 112 Kbps
Channel(s) : 2 channels
Sampling rate : 44.1 KHz
Resolution : 16 bits
Stream size : 56.2 MiB (8%)
Alignment : Split accross interleaves
Interleave, duration : 33 ms (1.00 video frame)
Interleave, preload duration : 500 ms

Here is a clip:



dangerous%20to%20know%20clip.avi

[aedipuss]

you do know asking for help with illegally downloaded copyright material is against the rules? and uploading some of it here is not going to win you any points.

[johns0]

Buy the movie,do not post warez or upload samples of it.Please read our rules.

[Baldrick]

This seems to be a "public domain" movie so reopening thread.

[johns0]

I check all around the web and couldnt find any evidence whether or not its still copyright or public domain but considering it was rated a b movie i dont think paramount would renew it,

[filmboss80]

From IMDB: "One of over 700 Paramount Productions, filmed between 1929 and 1949, which were sold to MCA/Universal in 1958 for television distribution, and have been owned and controlled by Universal ever since."

That doesn't determine whether or not the film is PD, but since it's a 72-year-old, hard-to-get, B-movie, I think we can cut the OP a little slack in this case.

The question is, are the scene-change frames with the combined fields really that noticeable when the movie is played at normal speed? I looked at the avi clip, and it didn't bother me.

[Khaver]

On the clip you attached you can use an avisynth script like this:

--
avisource("dangerous to know clip.avi")
selectevery(5,0,1,2,3)
--

For the full file you might need to adjust the last 4 numbers to 1,2,3,4 or 2,3,4,5 or 3,4,5,6 etc. depending on which blended frame is the first one of the clip

[fred3f]

thanks, this worked well. Is there a link where I can read about this command?

[Khaver]

The documentation for avisynth should have been installed on your computer when you installed avisynth.

[manono]

thanks, this worked well. Is there a link where I can read about this command?

It works only until the scene change at the end when the pattern changes and you keep the blend and lose a unique frame, making it play jerky. Are you saying that it works for the entire movie, or just for the sample (which it doesn't entirely)?

http://avisynth.org/mediawiki/Select

[aedipuss]

it's not public domain

Dangerous to Know (1938) More at IMDbPro »
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* One of over 700 Paramount Productions, filmed between 1929 and 1949, which were sold to MCA/Universal in 1958 for television distribution, and have been owned and controlled by Universal ever since.

[AlanHK]

thanks, this worked well. Is there a link where I can read about this command?

The wiki: http://avisynth.org/mediawiki/Select

If the select works for the whole movie, you're okay, but it might go out of sync.

If so, there is a script function that detects and removes blended frames that you can try:

AVISource("dangerous to know clip.avi")
Srestore(frate=23.976)

That's also in the wiki: http://avisynth.org/mediawiki/Srestore

However, you need to install some other plugins to make this work.
The documentation is rather cryptic, I really can't understand half of it. There may well be a better way to get it to IVTC after blend removal, but simply specifying the output framerate as above did work; though it left one blend in the clip, in a section with blurred background so it was difficult to detect a blend perhaps.