How to best deal with Apple (iPhone 11) shot at 30fps vs. 29.97fps

Craigster wrote on 4/8/2020, 8:35 PM

So, I know that in common parlance, people say "30 fps" when they mean 29.97 (drop or non-drop frame).

However, with Apple, apparently, they really mean it. Both VLC player and Video Pro X see Apple's iphone footage as true 30 fps; not as 29.97. AND in seeking to import iphone 11 footage, VPX asks me if I want to "adjust the project to fit the video". I don't know why it doesn't give me the option of adjusting the newly imported iphone video to my 29.97 project.

So, in this case, my project is essentially functioning as a music video. The drum hits, previously lined up perfectly, manually to pretty much the sample level to the external audio file, once rendered are in many cases showing up late. It's as if the "adjusted" withing VPX is erratic.

So, wondering: How are others of you working with imported Apple video at 30 fps in your NTSC-standard 29.97 VPX sessions?

(Thanks for any guidance. Somehow google searches are simply not helpful here regarding how to compensate.)

Last changed by Craigster

System 1: Gigabyte Z390 Designare, i9-9900k, 64GB RAM, Radeon RX580/Intel 630, Apollo X6, multiple Black HDD & SSDs. System 2: Gigabyte Z390 Aorus Pro WiFi, i7-9700k, 64GB RAM, Radeon RX560/Intel 630, Audient iD44, multiple Black HDD & SSDs.

Comments

CubeAce wrote on 4/9/2020, 1:32 AM

@Craigster

Hi.

Does VP-X not give you a choice of frame rate when you create a new project?

If it doesn't you should go to your movie settings and un-tick the box that saves the present project settings for new projects.

Ray.

Last changed by CubeAce on 4/9/2020, 1:35 AM, changed a total of 2 times.

 

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johnebaker wrote on 4/9/2020, 4:54 AM

@Craigster

Hi

. . . . "30 fps" when they mean 29.97 . . . .

A MediaInfo analysis of a clip will tell you exactly what the true frame rate is and whether is is fixed or variable among other useful information.

. . . . once rendered are in many cases showing up late . . . .

That suggests the video is variable frame rate.

John EB

Last changed by johnebaker on 4/9/2020, 4:56 AM, changed a total of 1 times.

VPX 16, Movie Studio 2025, and earlier versions 2015 and 2016, Music Maker Premium 2024.

PC - running Windows 11 23H2 Professional on Intel i7-8700K 3.2 GHz, 16GB RAM, RTX 2060 6GB 192-bit GDDR6, 1 x 1Tb Sabrent NVME SSD (OS and programs), 2 x 4TB (Data) internal HDD + 1TB internal SSD (Work disc), + 6 ext backup HDDs.

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Craigster wrote on 4/10/2020, 11:58 AM

@Craigster

Hi.

Does VP-X not give you a choice of frame rate when you create a new project?

Sure, but that's not the issue. The issue is MIXED Frame rates.

So, I'm in a 29.97 project with standard 29.97fps footage. And then I'm bringing in additional footage from an iPhone 11 which is shot at 30.0 fps. And so VPX asks if I want to "adjust the project". Again, adjusting the apple footage is what I would expect, but that option is not given (unless saying NO) does that. The result is small but noticeable drum hits that are off in timing.

System 1: Gigabyte Z390 Designare, i9-9900k, 64GB RAM, Radeon RX580/Intel 630, Apollo X6, multiple Black HDD & SSDs. System 2: Gigabyte Z390 Aorus Pro WiFi, i7-9700k, 64GB RAM, Radeon RX560/Intel 630, Audient iD44, multiple Black HDD & SSDs.

Craigster wrote on 4/10/2020, 12:04 PM

@Craigster

Hi

. . . . "30 fps" when they mean 29.97 . . . .

A MediaInfo analysis of a clip will tell you exactly what the true frame rate is and whether is is fixed or variable among other useful information.

. . . . once rendered are in many cases showing up late . . . .

That suggests the video is variable frame rate.

John EB


Hi John,

Thank you for the tip for MediaInfo.

VLC confirms the rate is 30fps.

IF the FCP footage is VARIABLE frame rate, does this mean it's designed to adapt? (i.e. will or should auto-adjust to 29.97)? So, in practical terms, I just tell VPX: No, I don't want to adjust my project?

 

ALSO, I'm assuming that VPX uses "drop frame" for it's 29.97, correct? (even though not specified).

My audio engineer partnering on our current project (again with iPhone footage) was exploring Apple's Compressor program yesterday which includes options for converting 30.0fps to 29.97, and 99.9% speed options. It's VERY time consuming. (Maybe 2 hours per 5 minute song). For multiple songs and tracks, I don't want to get lost in those woods unnecessarily.

Craig

System 1: Gigabyte Z390 Designare, i9-9900k, 64GB RAM, Radeon RX580/Intel 630, Apollo X6, multiple Black HDD & SSDs. System 2: Gigabyte Z390 Aorus Pro WiFi, i7-9700k, 64GB RAM, Radeon RX560/Intel 630, Audient iD44, multiple Black HDD & SSDs.

johnebaker wrote on 4/10/2020, 1:22 PM

@Craigster

Hi

The VLC analysis is insufficient, a MediaInfo video analysis is required - it gives more detail and may also indicate how the audio is synced.

. . . . IF the FCP footage is VARIABLE frame rate, does this mean it's designed to adapt? (i.e. will or should auto-adjust to 29.97)? So, in practical terms, I just tell VPX: No, I don't want to adjust my project? . . . .

Where does FCP footage come into this? .

If you are mixing FCP footage with iPhone footage in VPX then we need a MediaInfo analysis of both source video footage to see what is going on.

. . . . The issue is MIXED Frame rates . . . .

This is a different issue to your original post, until you last comment the post has been concerned with iPhone footage in VPX and audio out of sync.

Please clarify if you are using footage from multiple sources and provide a MediaInfo analysis of a video clip from each source.

John EB
Forum Moderator

 

 

 

VPX 16, Movie Studio 2025, and earlier versions 2015 and 2016, Music Maker Premium 2024.

PC - running Windows 11 23H2 Professional on Intel i7-8700K 3.2 GHz, 16GB RAM, RTX 2060 6GB 192-bit GDDR6, 1 x 1Tb Sabrent NVME SSD (OS and programs), 2 x 4TB (Data) internal HDD + 1TB internal SSD (Work disc), + 6 ext backup HDDs.

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Sony FDR-AX53e Video camera, DJI Osmo Action 3 and Sony HDR-AS30V Sports cams.

Craigster wrote on 4/11/2020, 2:40 PM

So sorry for mis-typing. Skip the FCP reference. Everything else stands. iPhone 11 30fps video. Created with Filmic Pro 6 (3rd party video app).

Thank you again for the MediaInfo tip:  It says: "...at 30.000 FPS, HEVC"

Meanwhile, my primary video cameras (Canon G10, G40, H41) all shoot to 29.97 (Media Info: "29.970 FPS, AVC).

So, yes, combining footage from multiple people, some of whom use iPhones. Seemed to have slight syncing issues.

You say this is NOT a "mixed frame rate" issue? Hmmm. So, if my terminology is wrong, what is a better way to specify? I am still wondering essentially 3 things (consistent from opening post 'til now). Let me re-state:

1. Can Video Pro X officially handle combining footage from differing frame rate sources (specifically the combination of Canon cameras at 29.97 and iPhones at 30.0) in a VPX 29.97 session, without synchronization issues?

2. If so, will I get better results by saying "No" to the prompt to "adjust the project to match the video" -- when the iPhone footage is brought in?

3. Or, if not... To get rock-solid tight sync, do I need to pursue a 3rd party app (like Apple's Compressor program) to pre-convert the Apple footage from 30.0 to 29.97 prior to importing into VPX for a 29.97 project?

 

 

 

System 1: Gigabyte Z390 Designare, i9-9900k, 64GB RAM, Radeon RX580/Intel 630, Apollo X6, multiple Black HDD & SSDs. System 2: Gigabyte Z390 Aorus Pro WiFi, i7-9700k, 64GB RAM, Radeon RX560/Intel 630, Audient iD44, multiple Black HDD & SSDs.

johnebaker wrote on 4/12/2020, 8:57 AM

@Craigster

Hi

. . . . Thank you again for the MediaInfo tip:  It says: "...at 30.000 FPS, HEVC" . . . .

We need all of the MediaInfo.

John EB

VPX 16, Movie Studio 2025, and earlier versions 2015 and 2016, Music Maker Premium 2024.

PC - running Windows 11 23H2 Professional on Intel i7-8700K 3.2 GHz, 16GB RAM, RTX 2060 6GB 192-bit GDDR6, 1 x 1Tb Sabrent NVME SSD (OS and programs), 2 x 4TB (Data) internal HDD + 1TB internal SSD (Work disc), + 6 ext backup HDDs.

Laptop - Lenovo Legion 5i Phantom - running Windows 11 24H2 on Intel Core i7-10750H, 16GB DDR4-SDRAM, 512GB SSD, 43.9 cm screen Full HD 1920 x 1080, Intel UHD 630 iGPU and NVIDIA GeForce RTX 2060 (6GB GDDR6)

Sony FDR-AX53e Video camera, DJI Osmo Action 3 and Sony HDR-AS30V Sports cams.

Metallica4Life wrote on 4/12/2020, 1:31 PM

So sorry for mis-typing. Skip the FCP reference. Everything else stands. iPhone 11 30fps video. Created with Filmic Pro 6 (3rd party video app).

Thank you again for the MediaInfo tip:  It says: "...at 30.000 FPS, HEVC"

Meanwhile, my primary video cameras (Canon G10, G40, H41) all shoot to 29.97 (Media Info: "29.970 FPS, AVC).

So, yes, combining footage from multiple people, some of whom use iPhones. Seemed to have slight syncing issues.

You say this is NOT a "mixed frame rate" issue? Hmmm. So, if my terminology is wrong, what is a better way to specify? I am still wondering essentially 3 things (consistent from opening post 'til now). Let me re-state:

1. Can Video Pro X officially handle combining footage from differing frame rate sources (specifically the combination of Canon cameras at 29.97 and iPhones at 30.0) in a VPX 29.97 session, without synchronization issues?

2. If so, will I get better results by saying "No" to the prompt to "adjust the project to match the video" -- when the iPhone footage is brought in?

3. Or, if not... To get rock-solid tight sync, do I need to pursue a 3rd party app (like Apple's Compressor program) to pre-convert the Apple footage from 30.0 to 29.97 prior to importing into VPX for a 29.97 project?

 

 

 

Hey Craigster dude :)

I'm not sure if you managed to solve this issue yet or not, I hope you have. In regarding Video X managing to handle multiple frame rates within a Project, I believe it to be possible. I'm currently creating a Drum Video Lesson library,
and some of the AVI masters I have of my first video's were shot at 1080/30P, but I have managed to seamlessly mix them into my now usual settings of 720 50P. Which is just a slight difference ha ha, but so far so good, I'm only rendering them for my students to then download from the cloud, so obviously my chosen export settings are of low bit rate MP4, but they come out as well as I could hope, and are perfect for what purpose they serve.

In regards to synch issues, I do sometimes have an issue selecting the 'synch with other file' right click option, which when it works is awesome, but I do find myself still having to zoom in great detail to synch up drums with backing tracks etc.. Anyways I hope you fixed it, best of luck!

Craigster wrote on 4/15/2020, 8:29 PM

 

@Craigster

Hi

. . . . Thank you again for the MediaInfo tip:  It says: "...at 30.000 FPS, HEVC" . . . .

We need all of the MediaInfo.

John EB


OK I need help.

I don't see in the forum an attachment option. Can you advise?

And, do I Screenshot the main (Basic) page of MediaInfo per file? Or do I Export?

This is new to me.

System 1: Gigabyte Z390 Designare, i9-9900k, 64GB RAM, Radeon RX580/Intel 630, Apollo X6, multiple Black HDD & SSDs. System 2: Gigabyte Z390 Aorus Pro WiFi, i7-9700k, 64GB RAM, Radeon RX560/Intel 630, Audient iD44, multiple Black HDD & SSDs.

johnebaker wrote on 4/16/2020, 3:10 AM

@Craigster

With MediaInfo open and displaying the analysis of the clip:

  1. select View, Text
  2. right click with the mouse in the text and click Select all
  3. right click again and click Copy

You now have a copy of the text in the computers 'clipboard' at this point do not copy any thing else or you will lose the copied text.

Create a comment and at the point where you want the analysis to appear right click and select Paste

HTH

John EB

VPX 16, Movie Studio 2025, and earlier versions 2015 and 2016, Music Maker Premium 2024.

PC - running Windows 11 23H2 Professional on Intel i7-8700K 3.2 GHz, 16GB RAM, RTX 2060 6GB 192-bit GDDR6, 1 x 1Tb Sabrent NVME SSD (OS and programs), 2 x 4TB (Data) internal HDD + 1TB internal SSD (Work disc), + 6 ext backup HDDs.

Laptop - Lenovo Legion 5i Phantom - running Windows 11 24H2 on Intel Core i7-10750H, 16GB DDR4-SDRAM, 512GB SSD, 43.9 cm screen Full HD 1920 x 1080, Intel UHD 630 iGPU and NVIDIA GeForce RTX 2060 (6GB GDDR6)

Sony FDR-AX53e Video camera, DJI Osmo Action 3 and Sony HDR-AS30V Sports cams.

Craigster wrote on 4/16/2020, 4:02 PM

Thank you, John.

So, here is the iphone 11 video info: (below will be info for 3 more cameras and 1 more iphone. 5 cams total. Audio was recorded separately per source, and lined up manually.):

General
Complete name                            : E:\For Streaming April 5\SONGS-Music-Video\Jeff Drums\Drum Videos\201_Drums_Yes I Will.mov
Format                                   : MPEG-4
Format profile                           : QuickTime
Codec ID                                 : qt   0000.00 (qt  )
File size                                : 2.36 GiB
Duration                                 : 4 min 31 s
Overall bit rate                         : 74.6 Mb/s
Encoded date                             : UTC 2020-04-04 02:09:22
Tagged date                              : UTC 2020-04-04 02:13:54
Writing library                          : Apple QuickTime
com.apple.quicktime.publisher            : ISO: 37.0
com.apple.quicktime.software             : Created with FiLMiC Pro6.10.81065

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main@L6.1@Main
Codec ID                                 : hvc1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 4 min 31 s
Bit rate                                 : 74.5 Mb/s
Width                                    : 1 920 pixels
Clean aperture width                     : 1 920 pixels
Height                                   : 1 080 pixels
Clean aperture height                    : 1 080 pixels
Display aspect ratio                     : 16:9
Clean aperture display aspect ratio      : 16:9
Frame rate mode                          : Variable
Frame rate                               : 30.000 FPS
Minimum frame rate                       : 29.268 FPS
Maximum frame rate                       : 30.769 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Bits/(Pixel*Frame)                       : 1.197
Stream size                              : 2.36 GiB (100%)
Title                                    : Core Media Video
Encoded date                             : UTC 2020-04-04 02:09:22
Tagged date                              : UTC 2020-04-04 02:13:54
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : hvcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 4 min 31 s
Source duration                          : 4 min 31 s
Bit rate mode                            : Constant
Bit rate                                 : 64.0 kb/s
Channel(s)                               : 1 channel
Channel layout                           : C
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 2.05 MiB (0%)
Source stream size                       : 2.05 MiB (0%)
Title                                    : Core Media Audio
Encoded date                             : UTC 2020-04-04 02:09:22
Tagged date                              : UTC 2020-04-04 02:13:54

 

Here is MediaInfo from which footage was taken from my primary Canon G10 videocam, the basis for the 29.97 VPX movie:

General
ID                                       : 0 (0x0)
Complete name                            : E:\For Streaming April 5\SONGS-Music-Video\CraigVox-Piano\G10_Cam2\02_Craig_Yes I Will-2_G10.MTS
Format                                   : BDAV
Format/Info                              : Blu-ray Video
File size                                : 700 MiB
Duration                                 : 5 min 48 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 16.9 Mb/s
Maximum Overall bit rate                 : 18.0 Mb/s
Recorded date                            : 2020-04-02 19:31:32-08:00
Writing application                      : Canon

Video
ID                                       : 4113 (0x1011)
Menu ID                                  : 1 (0x1)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 2 frames
Format settings, GOP                     : M=3, N=15
Codec ID                                 : 27
Duration                                 : 5 min 47 s
Bit rate mode                            : Variable
Bit rate                                 : 16.0 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 29.970 (30000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan type, store method                  : Separated fields
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 0.257
Stream size                              : 660 MiB (94%)

Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : 129
Duration                                 : 5 min 48 s
Bit rate mode                            : Constant
Bit rate                                 : 256 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Delay relative to video                  : 14 ms
Stream size                              : 10.6 MiB (2%)
Service kind                             : Complete Main

 

And here from a secondary Canon VideoCam: G41

General
ID                                       : 0 (0x0)
Complete name                            : E:\For Streaming April 5\SONGS-Music-Video\CraigVox-Piano\H41_Cam2\25_Craig_Yes I Will-2_H41_Cam2.MTS
Format                                   : BDAV
Format/Info                              : Blu-ray Video
File size                                : 695 MiB
Duration                                 : 5 min 45 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 16.9 Mb/s
Maximum Overall bit rate                 : 18.0 Mb/s
Recorded date                            : 2020-04-02 19:33:05-05:00
Writing application                      : Canon

Video
ID                                       : 4113 (0x1011)
Menu ID                                  : 1 (0x1)
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 2 frames
Format settings, GOP                     : M=3, N=15
Codec ID                                 : 27
Duration                                 : 5 min 45 s
Bit rate mode                            : Variable
Bit rate                                 : 16.0 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 29.970 (30000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan type, store method                  : Separated fields
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 0.257
Stream size                              : 655 MiB (94%)

Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : 129
Duration                                 : 5 min 45 s
Bit rate mode                            : Constant
Bit rate                                 : 256 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Delay relative to video                  : 46 ms
Stream size                              : 10.6 MiB (2%)
Service kind                             : Complete Main

 

Here is from a 3rd Camera - I believe a Nikon DSLR:

General
Complete name                            : E:\For Streaming April 5\SONGS-Music-Video\Nate\402_Nate_Yes I Will 2.m4v
Format                                   : MPEG-4
Codec ID                                 : M4V  (M4V /M4A /mp42/isom)
File size                                : 320 MiB
Duration                                 : 4 min 9 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 10.8 Mb/s
Encoded date                             : UTC 2020-04-04 06:14:13
Tagged date                              : UTC 2020-04-04 06:14:46

Video
ID                                       : 2
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 2 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 2 frames
Format settings, GOP                     : M=2, N=30
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 4 min 9 s
Bit rate mode                            : Variable
Bit rate                                 : 10.5 Mb/s
Maximum bit rate                         : 768 kb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 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)                       : 0.169
Stream size                              : 312 MiB (98%)
Title                                    : Core Media Video
Encoded date                             : UTC 2020-04-04 06:14:13
Tagged date                              : UTC 2020-04-04 06:14:46
Color range                              : Limited
colour_range_Original                    : Full
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Audio
ID                                       : 1
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 4 min 9 s
Source duration                          : 4 min 9 s
Bit rate mode                            : Constant
Bit rate                                 : 256 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 7.54 MiB (2%)
Source stream size                       : 7.54 MiB (2%)
Title                                    : Core Media Audio
Encoded date                             : UTC 2020-04-04 06:14:13
Tagged date                              : UTC 2020-04-04 06:14:46

 

And then from an older iPhone cameraphone (7?)

Also at 30fps, as it turns out.

General
Complete name                            : E:\For Streaming April 5\SONGS-Music-Video\Bass 4.4.20\301_Yes I will_Bass Visual.MOV
Format                                   : MPEG-4
Format profile                           : QuickTime
Codec ID                                 : qt   0000.00 (qt  )
File size                                : 221 MiB
Duration                                 : 3 min 58 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 7 766 kb/s
Encoded date                             : UTC 2020-04-04 03:06:54
Tagged date                              : UTC 2020-04-04 03:10:53
Writing library                          : Apple QuickTime
com.apple.quicktime.location.ISO6709     : +33.9297-118.0155+066.941/
com.apple.quicktime.make                 : Apple
com.apple.quicktime.model                : iPhone 8 Plus
com.apple.quicktime.software             : 13.3.1
com.apple.quicktime.creationdate         : 2020-04-03T20:06:54-0700

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main@L4@Main
Codec ID                                 : hvc1
Codec ID/Info                            : High Efficiency Video Coding
Duration                                 : 3 min 58 s
Bit rate                                 : 7 622 kb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Variable
Frame rate                               : 30.000 FPS
Minimum frame rate                       : 28.571 FPS
Maximum frame rate                       : 31.579 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Bits/(Pixel*Frame)                       : 0.123
Stream size                              : 217 MiB (98%)
Title                                    : Core Media Video
Encoded date                             : UTC 2020-04-04 03:06:54
Tagged date                              : UTC 2020-04-04 03:10:53
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : hvcC

Audio
ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 3 min 58 s
Source duration                          : 3 min 58 s
Bit rate mode                            : Variable
Bit rate                                 : 109 kb/s
Channel(s)                               : 1 channel
Channel layout                           : C
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 3.10 MiB (1%)
Source stream size                       : 3.10 MiB (1%)
Title                                    : Core Media Audio
Encoded date                             : UTC 2020-04-04 03:06:54
Tagged date                              : UTC 2020-04-04 03:10:53

Other #1
Type                                     : meta
Duration                                 : 3 min 58 s
Bit rate mode                            : Variable

Other #2
Type                                     : meta
Duration                                 : 3 min 58 s
Bit rate mode                            : Constant

 

 

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johnebaker wrote on 4/17/2020, 4:30 AM

@Craigster

Hi

Thanks for the MediaInfo data.

I do not think the different file formats should be an issue, however mixing constant and variable framerate could be causing the out of sync audio.

I would convert the iPhone video files to constant bitrate so that all sources is the same - try Handbrake it is free.

AFAICS all iPhones record video as variable frame rate.

Note: that the using Movie Edit Pro the audio/video sync can be as much as a 1/2 frame out, ie for 30 fps video the lead/delay maximum is 1/60th of a second - this should be OK.

HTH

John EB

VPX 16, Movie Studio 2025, and earlier versions 2015 and 2016, Music Maker Premium 2024.

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Craigster wrote on 4/17/2020, 4:08 PM

Interesting.

So, not a problem, per se with varying frame rates (within 1/2 frame in VPX/MEP); but the variability in the iPhone framerate tolerance may be causing the problem.

Wondering if you might have misspoken, as the iPhone video files DO have a constant "bitrate".

Are you suggesting that I convert via Handbrake the iphone video to simply "constant frame rate", or to a particular one? i.e. to lock it to 29.97?

Thank you, John, for your input here.

 

Craig

System 1: Gigabyte Z390 Designare, i9-9900k, 64GB RAM, Radeon RX580/Intel 630, Apollo X6, multiple Black HDD & SSDs. System 2: Gigabyte Z390 Aorus Pro WiFi, i7-9700k, 64GB RAM, Radeon RX560/Intel 630, Audient iD44, multiple Black HDD & SSDs.

johnebaker wrote on 4/17/2020, 5:23 PM

@Craigster

Hi

. . . . Wondering if you might have misspoken, as the iPhone video files DO have a constant "bitrate". . . . .

No mis-speak - it is the time code relative relative to the frame(s) or interleave that the audio is synced to, or not in the case of unsynced encoding which relies on very stable clock signals to maintain sync.

Bitrate is how much data per second is stored - the higher the better quality the video however there are limits.

Convert the iPhone video 29.97 fps as this is the nominal frame rate they are set to record to and G41 and Nikon already are 29.97 fps constant frame rate.

John EB

VPX 16, Movie Studio 2025, and earlier versions 2015 and 2016, Music Maker Premium 2024.

PC - running Windows 11 23H2 Professional on Intel i7-8700K 3.2 GHz, 16GB RAM, RTX 2060 6GB 192-bit GDDR6, 1 x 1Tb Sabrent NVME SSD (OS and programs), 2 x 4TB (Data) internal HDD + 1TB internal SSD (Work disc), + 6 ext backup HDDs.

Laptop - Lenovo Legion 5i Phantom - running Windows 11 24H2 on Intel Core i7-10750H, 16GB DDR4-SDRAM, 512GB SSD, 43.9 cm screen Full HD 1920 x 1080, Intel UHD 630 iGPU and NVIDIA GeForce RTX 2060 (6GB GDDR6)

Sony FDR-AX53e Video camera, DJI Osmo Action 3 and Sony HDR-AS30V Sports cams.

Scenestealer wrote on 4/17/2020, 5:36 PM

@Craigster

Hi

So, not a problem, per se with varying frame rates (within 1/2 frame in VPX/MEP); but the variability in the iPhone framerate tolerance may be causing the problem.

John is just referring to the fact that MEP is only frame accurate in terms of its ability to sync audio with video whereas VPX is audio sample accurate.

Variable frame rate is a bigger problem in either program and can lead to problems like sound but no picture display, etc. Try searching the forum for "Variable Frame Rate".

You should convert you your iPhone footage to the same frame rate as the majority of the sources are using and use this as your Project / Movie setting FR as well.

Peter

Last changed by Scenestealer on 4/18/2020, 5:28 AM, changed a total of 1 times.

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Craigster wrote on 4/17/2020, 8:32 PM

Perfect. Thank you so much, guys!

 

System 1: Gigabyte Z390 Designare, i9-9900k, 64GB RAM, Radeon RX580/Intel 630, Apollo X6, multiple Black HDD & SSDs. System 2: Gigabyte Z390 Aorus Pro WiFi, i7-9700k, 64GB RAM, Radeon RX560/Intel 630, Audient iD44, multiple Black HDD & SSDs.