Unquantized Frames

john_dennis wrote on 5/4/2022, 1:20 PM

Per the following video:

Quantize To Frames = Active

Cursor set to literal location using Selection Start Window

Media event was split using "S" key

Media event was not cut at the expected selection point.

Comments

DMT3 wrote on 5/4/2022, 1:30 PM

 

what setting are you using for the timeline ruler (smpte drop frame, non- drop, etc?)

john_dennis wrote on 5/4/2022, 1:52 PM

Vegas Properties are set to Time and Frames.

I checked the camera settings and it is set to Drop Frame.

Media

General
Complete name                            : E:\2022-04-22 Baseball Game\2022-04-22-003.MP4
Format                                   : XAVC
Codec ID                                 : XAVC (XAVC/mp42/iso2)
File size                                : 2.37 GiB
Duration                                 : 3 min 26 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 98.4 Mb/s
Encoded date                             : UTC 2022-04-23 00:36:08
Tagged date                              : UTC 2022-04-23 00:36:08

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L5.1
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 2 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 3 min 26 s
Bit rate mode                            : Variable
Bit rate                                 : 96.5 Mb/s
Maximum bit rate                         : 100.0 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.388
Stream size                              : 2.32 GiB (98%)
Encoded date                             : UTC 2022-04-23 00:36:08
Tagged date                              : UTC 2022-04-23 00:36:08
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 2
Format                                   : PCM
Format settings                          : Big / Signed
Codec ID                                 : twos
Duration                                 : 3 min 26 s
Bit rate mode                            : Constant
Bit rate                                 : 1 536 kb/s
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 kHz
Bit depth                                : 16 bits
Stream size                              : 37.8 MiB (2%)
Encoded date                             : UTC 2022-04-23 00:36:08
Tagged date                              : UTC 2022-04-23 00:36:08

Other
Type                                     : meta
Duration                                 : 3 min 26 s

 

john_dennis wrote on 5/4/2022, 2:03 PM

@DMT3

Thank you. I'm awake, now. Or, I will be after a get another cup of coffee.

DMT3 wrote on 5/4/2022, 2:22 PM

Yeah, they need to match for accuracy.

Former user wrote on 5/4/2022, 2:39 PM

@john_dennis Yep, same when the timeline is set at Time and Frames, 30fps media cuts/splits fine but i get the same result as you with 29.97fps, If i set the timeline to SMPTE Non-Drop (29.97fps Video) 29.97fps media cut/split fine, I haven't tried SMPTE Drop (29.97fps Video)

PS i was playing with this while you uploaded , watching your vid just learnt right click on the time shows the ruler 👍

DMT3 wrote on 5/4/2022, 2:44 PM

@Former user that is because the math is wrong between time and frames and smpte. if your original is drop-frame, it is best for your timeline ruler to match (of if non-drop, it should match). Most cameras flag as drop-frame because that is the most accurate for 29.97 fps.

Yelandkeil wrote on 5/4/2022, 2:56 PM

Engage Quantize to Frames

means the movement of cursor and/or video event goes frame-wise if enabled, i.e. when you wannna cut you'd firstly let your cursor snapping to a framehead/end, NOT a certain time point.

@john_dennis

I always use Ruler Time&Frame.

Last changed by Yelandkeil on 5/4/2022, 3:00 PM, changed a total of 2 times.

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Former user wrote on 5/4/2022, 3:06 PM

@DMT3 Just been reading 🤯😂 good learning tho

Google searched - drop-frame vs. non-dropframe timecode - pdf quote - 'Also, when we talk about being 1.8 frames ahead or behind, we are referring to the frame numbering scheme being ahead of real time. It does not refer to the video track being ahead or behind the audio track; audio that drifts away from its video is a different issue,' 👍

https://www.connect.ecuad.ca/~mrose/pdf_documents/timecode.pdf

DMT3 wrote on 5/4/2022, 3:19 PM

@Yelandkeil then you are sacrificing accuracy of timing, not editing but program length if your source/output is 29.97. This becomes more of an issue when the program is long (hour or so). Your program length could be off about 4 seconds over an hour. For a TV broadcast this is important, for youtube not so much.

Yelandkeil wrote on 5/4/2022, 4:51 PM

@DMT3, yes.

A short advertisement in the TV broadcast could lost 4-10 frames that time. It WAS a NTSC problem.

In our PAL world never happened, though now I use 59.94fps for smooth motion.

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DMT3 wrote on 5/4/2022, 4:56 PM

@Yelandkeil one of the several problems with NTSC. 😉

john_dennis wrote on 5/4/2022, 5:57 PM

This article on the subject is succinct.

https://www.bhphotovideo.com/c/find/newsLetter/Frame-or-Non-Drop-Frame.jsp#:~:text=Drop%20frame%20is%20a%20standard,account%20for%20the%2029.97%20fps.

"Sometimes people will refer to 29.97 fps as “30 fps,” which can cause confusion. Problems may occur any time source footage is captured at the wrong frame rate. It is better to be accurate and write NTSC (ND or NDF) than to refer to “30 fps.” Most professionals will know all NTSC is 29.97, but accuracy can prevent mistakes. PAL countries do not experience this issue since the video frame rate is always 25 fps. The high-definition (HD) formats follow the same rules as standard definition and are listed below."

I'm not completely certain there's not a typo in the text, though.

Dexcon wrote on 5/4/2022, 6:18 PM

For many years, I've experienced video events sometimes missing the Quantize frame edge particularly after using the Ripple tool (all tracks etc). Quantize to Frames options were both checked 'on' and the ruler has always been 'Time & Frames'. A difference is that the projects have all been 25 fps so no drop-down issue is involved I would have thought.

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DMT3 wrote on 5/4/2022, 6:21 PM

I'm not completely certain there's not a typo in the text, though.

 

What typo are you referring to?

DMT3 wrote on 5/4/2022, 6:22 PM

@Dexcon drop frame and drop down are different issues, and there is no DF in PAL. If you use TIME/FRAMES with 25fps footage how does it know? Put your cursor at a position on the timeline like 01:39:00 and switch between time/frames and SMPTE 25fps and you will get a different time.

Like I said, for accuracy the ruler should match your footage or else the math for rippling etc will be wrong.

john_dennis wrote on 5/4/2022, 6:33 PM

@DMT3

“NTSC (ND or NDF)”

DMT3 wrote on 5/4/2022, 6:35 PM

Yeah should be DF or NDF. heh, good catch.

Dexcon wrote on 5/4/2022, 6:56 PM

@DMT3

Put your cursor at a position on the timeline like 01:39:00 and switch between time/frames and SMPTE 25fps and you will get a different time.

I've just tried that and the time stayed the same; however, there was a subtle difference in the time display.

Time & Frames 00:50:45.00

SMPTE EBU (25 fps, Video) 00:50:45:00

T&F has a full stop between 45 and 00, but SMPTE has a colon between 45:00.

I'll leave it on SMPTE and see how that works with rippling. Thanks.

Cameras: Sony FDR-AX100E; GoPro Hero 11 Black Creator Edition

Installed: Vegas Pro 15, 16, 17, 18, 19, 20, 21 & 22, HitFilm Pro 2021.3, DaVinci Resolve Studio 19.0.3, BCC 2025, Mocha Pro 2025.0, NBFX TotalFX 7, Neat NR, DVD Architect 6.0, MAGIX Travel Maps, Sound Forge Pro 16, SpectraLayers Pro 11, iZotope RX11 Advanced and many other iZ plugins, Vegasaur 4.0

Windows 11

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10th Gen Intel i9 10900KF - 10 cores (20 threads) - 3.7 to 5.3 GHz

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64GB RAM - Dual Channel HyperX FURY DDR4 XMP at 3200MHz

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DMT3 wrote on 5/4/2022, 7:00 PM

If you stop in on a zero frame then they do match, my error in example. Stop it at frame 12 and see what happens.

Dexcon wrote on 5/4/2022, 7:12 PM

Stop it at frame 12 and see what happens.

I'v tested that at 4 different points on the timeline using both odd and even frame numbers - no change at all in the time between T&F and SMPTE, only the full stop/colon display being different. I wonder if the change in time is an issue with NTSC but not with PAL.

Cameras: Sony FDR-AX100E; GoPro Hero 11 Black Creator Edition

Installed: Vegas Pro 15, 16, 17, 18, 19, 20, 21 & 22, HitFilm Pro 2021.3, DaVinci Resolve Studio 19.0.3, BCC 2025, Mocha Pro 2025.0, NBFX TotalFX 7, Neat NR, DVD Architect 6.0, MAGIX Travel Maps, Sound Forge Pro 16, SpectraLayers Pro 11, iZotope RX11 Advanced and many other iZ plugins, Vegasaur 4.0

Windows 11

Dell Alienware Aurora 11:

10th Gen Intel i9 10900KF - 10 cores (20 threads) - 3.7 to 5.3 GHz

NVIDIA GeForce RTX 2080 SUPER 8GB GDDR6 - liquid cooled

64GB RAM - Dual Channel HyperX FURY DDR4 XMP at 3200MHz

C drive: 2TB Samsung 990 PCIe 4.0 NVMe M.2 PCIe SSD

D: drive: 4TB Samsung 870 SATA SSD (used for media for editing current projects)

E: drive: 2TB Samsung 870 SATA SSD

F: drive: 6TB WD 7200 rpm Black HDD 3.5"

Dell Ultrasharp 32" 4K Color Calibrated Monitor

 

LAPTOP:

Dell Inspiron 5310 EVO 13.3"

i5-11320H CPU

C Drive: 1TB Corsair Gen4 NVMe M.2 2230 SSD (upgraded from the original 500 GB SSD)

Monitor is 2560 x 1600 @ 60 Hz

DMT3 wrote on 5/4/2022, 7:23 PM

My mistake. If the project is set for PAL then the ruler time/frame is correct. Curious to see if the SMPTE fixes your boundary issues.