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1

Frame Sampling interpolates frames as in Optical Flow

Explorer ,
Aug 21, 2023 Aug 21, 2023

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Issue 

25fps footage in a 50fps timeline has interpolated frames despite being set to "Frame Sampling"

 

Adobe Premiere Pro version number

v23.6

 

Operating system

Windows 10 22H2

 

System Info: CPU, GPU, RAM, HD:

AMD Ryzen 9 5900X

Nvidia GeForce GTX 1050Ti

64GB RAM

internal NVMe SSD, SSD over USB3.1 and HDD over Network

 

Workflow details

Mixed framerate footage on a timeline, no frame interpolation desiered

 

Steps to reproduce 

Insert via drag and drop from project window or via insert from source monitor.

Stepping through the footage (set to Frame Sampling) frame by frame.

 

Expected result 

Every second frame is duplicated ->  no frame interpolation

 

Actual result 

Every frame is different (like Optical Flow | depends on footage (see "Video format" - no consistency/no pattern detected)

 

Video format(s)

PROBLEM DOES OCCOUR

 

Typ: MXF
Dateigröße: 2,25 GB
Bildgröße: 1920 x 1080
Framerate: 25,00
Audioformat der Quelle: 48000 Hz - 24 Bit - 4 Kanäle
Audioformat des Projekts: 48000 Hz - 32-Bit-Floating-Point - 4 Kanäle
Gesamtdauer: 00:07:25:23
Pixel-Seitenverhältnis: 1,0
Alpha: Keine
Farbraum: Rec. 709
Farbraum überschreiben: Aus
Eingabe-LUT: Keine

MXF-Dateiinformationen:
Wrapper-Typ: MXF OP1a (Typ: SingleItem SinglePackage MultiTrack Stream Internal)
Datei erzeugt von: CANON, EOS C300 Mark II (1.00)
AVC Long GOP High 4:2:2 Profile 10-bit Unconstrained Coding

-----

Typ: MXF
Dateigröße: 164,28 MB
Bildgröße: 1440 x 1080
Framerate: 25,00
Audioformat der Quelle: 48000 Hz - 16-Bit - 4 Kanäle
Audioformat des Projekts: 48000 Hz - 32-Bit-Floating-Point - 4 Kanäle
Gesamtdauer: 00:00:11:24
Pixel-Seitenverhältnis: 1,3333
Alpha: Keine

MXF-Dateiinformationen:
Wrapper-Typ: MXF-OP Atom (Typ: N Tracks, 1 Quellclip)
Datei erzeugt von: Panasonic, P2 (2.0)
DV 100

P2-Metadaten-Details:
UserClipName: STA_01_71
DataSource: SHOOTING

Access:
Creator: TNN
CreationDate: 2022-11-15T12:48:22-01:00
LastUpdateDate: 2022-11-15T12:48:34-01:00

Device:
Manufacturer: Panasonic
SerialNo.: K2TAA0019
ModelName: AG-HPX371E

-----

(Ninja V)

Typ: QuickTime-Film
Dateigröße: 1,92 GB
Bildgröße: 1920 x 1080
Framerate: 25,00
Audioformat der Quelle: 48000 Hz - 24 Bit - Mono
Audioformat des Projekts: 48000 Hz - 32-Bit-Floating-Point - Mono
Gesamtdauer: 00:02:29:06
Pixel-Seitenverhältnis: 1,0
Alpha: Keine
Farbraum: Rec. 709
Farbraum überschreiben: Aus
Eingabe-LUT: Keine

QuickTime-Details:
Film enthält 1 Videospur(en), 1 Audiospur(en), 0 Untertitelspur(en) und 1 Timecode-Spur(en).

Video:
Es sind 3731 Frames mit einer Dauer von 1/25. vorhanden.

Videospur 1:
Dauer beträgt 0:02:29:06
Durchschnittliche Framerate beträgt 25,00 fps

Videospur 1 enthält 1 Typ(en) Videodaten:

Videodatenblock Nr. 1:
Framegröße = 1920 x 1080
Kompressor = Apple ProRes 422
Qualität = Höchste (5,00)

----------------------------------------------------------------

PROBLEM DOES NOT OCCOUR

 

(Ninja V)

Typ: QuickTime-Film
Dateigröße: 20,01 GB
Bildgröße: 3840 x 2160
Framerate: 25,00
Audioformat der Quelle: 48000 Hz - 24 Bit - Stereo
Audioformat des Projekts: 48000 Hz - 32-Bit-Floating-Point - Stereo
Gesamtdauer: 00:03:57:23
Pixel-Seitenverhältnis: 1,0
Alpha: Keine
Farbraum: Rec. 709
Farbraum überschreiben: Aus
Eingabe-LUT: Keine

QuickTime-Details:
Film enthält 1 Videospur(en), 1 Audiospur(en), 0 Untertitelspur(en) und 1 Timecode-Spur(en).

Video:
Es sind 5948 Frames mit einer Dauer von 1/25. vorhanden.

Videospur 1:
Dauer beträgt 0:03:57:22
Durchschnittliche Framerate beträgt 25,01 fps

Videospur 1 enthält 1 Typ(en) Videodaten:

Videodatenblock Nr. 1:
Framegröße = 3840 x 2160
Kompressor = Apple ProRes 422 HQ
Qualität = Höchste (5,00)

-----

(A7sIII)

Typ: MPEG-Film
Dateigröße: 800,14 MB
Bildgröße: 1920 x 1080
Framerate: 25,00
Audioformat der Quelle: 48000 Hz - 16-Bit - Stereo
Audioformat des Projekts: 48000 Hz - 32-Bit-Floating-Point - Stereo
Gesamtdauer: 00:01:12:00
Pixel-Seitenverhältnis: 1,0
Alpha: Keine
Farbraum: Rec. 709
Farbraum überschreiben: Aus
Eingabe-LUT: Keine
Videocodec-Typ: MP4/MOV H.264 10 bit 4:2:2

-----

(A7sII)

Typ: MPEG-Film
Dateigröße: 355,19 MB
Bildgröße: 3840 x 2160
Framerate: 25,00
Audioformat der Quelle: 48000 Hz - 16-Bit - Stereo
Audioformat des Projekts: 48000 Hz - 32-Bit-Floating-Point - Stereo
Gesamtdauer: 00:00:28:20
Pixel-Seitenverhältnis: 1,0
Alpha: Keine
Farbraum: Rec. 709
Farbraum überschreiben: Aus
Eingabe-LUT: Keine
Videocodec-Typ: MP4/MOV H.264 4:2:0

 

 

for further information please view following discussion:

https://community.adobe.com/t5/premiere-pro-discussions/frame-interpolation-bug/m-p/14022735#M473197

 

Bug Unresolved
TOPICS
Editing and playback , Import and ingest

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4 Comments
Adobe Employee ,
Aug 21, 2023 Aug 21, 2023

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I'd like to know more about what you are doing and seeing. It looks like you are using Pr 23.6 on Win, right?
I'm using Pr24.0xBeta034 on mac M1 system with McOS 13.5, and I also tried it using Pr 23.6 on Win 10. In both cases, what I am seeing is the opposite of what you described... it's always duplicating frames and not interpolating in-between frames when the Time Interpolation is set to Optical Flow.

I'm going to try to send you a short video via direct message. Please watch it if you can and tell me how our steps differ. Thanks in advance.

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Explorer ,
Aug 21, 2023 Aug 21, 2023

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Hi jstrawn,

 

yes it's Pr 23.6 on Win 10 (both PCs I used to test).

I didn't roll back to an earlier version yet to test if the problem occours there but will do it in a while.

I also will record you a video, maybe it's easier to show than to describe.

 

Will wirte to you soon.

 

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Explorer ,
Aug 21, 2023 Aug 21, 2023

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Hello again,

 

Thanks for your video. I did the same as you did.

Just when I wanted to record you the video, I got a reply in the discussion thread, suggesting checking for interlaced footage. This was the reason why the 25fps footage had a new frame on every of the 50fps timeline.

So the problem is solved. No bug - just a dumb oversight 😐

 

Thanks for looking into it.

 

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Adobe Employee ,
Aug 21, 2023 Aug 21, 2023

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Thanks for the update. I'm glad things are working for you. True, in my case I was always using progressive sequences and media. I'm glad someone pointed that out. 

 

If you DO want to see actual frame interpolation, turn on Optical Flow and either render that section of the Timeline, or park on a frame for a second or so and you should see the interpolated frame draw in. I have a 'horses running' video and it works well there, although you can sometimes spot the imperfections. Optical Flow was implemented a LONG time before any Gen AI, as we know it now, came along.

OptiFlowHorses.png

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