Sequoia problem, video not smooth

[piergiorgio]

hi, I did some tests, for me the hardware acceleration problem has been solved. Thanks for the work done

[Igor]

36 minutes ago, piergiorgio said:

hi, I did some tests, for me the hardware acceleration problem has been solved. Thanks for the work done

Hi, thanks for the confirmation. I'm glad!

[willemx]

On 11/30/2024 at 3:00 PM, Igor said:

So you have original iPhone's video (MOV file) and it plays smooth in QuickTime player on your Macbook?

Yes.

On 11/30/2024 at 3:00 PM, Igor said:

Then you start a new project in PTE AV Studio 11.0.15 Build 3 (the latest version, it's important), add this one video file.

Yes.

On 11/30/2024 at 3:00 PM, Igor said:

Do you click the Preview button and see this issue (not smooth playback) in a full screen preview?

Yes.

On 11/30/2024 at 3:00 PM, Igor said:

Or you create a MP4 video from your project in PTE AV Studio and then play the created MP4 video file in QuickTime and see not smooth playback?

Yes and also on AppleTV.

On 11/30/2024 at 3:00 PM, Igor said:

I share with you a test video recording from my old iPhone (1920 x 1080, 60p), a train in mountains:
https://drive.google.com/file/d/1z5tFzMSBiuVOxqoBqtoD_DOsaTY73H-J/view?usp=sharing

If I import your video in my project, it plays fine (both in preview and when published).

So there seems to be a difference in video formats between your iPhone video and mine.

On 11/30/2024 at 3:00 PM, Igor said:

You can share your video sample. We'll check it.

Note, that playback of 4K video (added a project) in a live preview of PTE AV Studio (full screen preview) may be not enough smooth. Or if you add several videos, because during a transition effect two or more mixed videos appear on the screen at the same time.

However once you create a final video at 1080p or 4K, the created video file should play smooth in QuickTime, VLC or Apple TV.

Please also share a screenshot of the video export window in PTE AV Studio to see what settings you have chosen.

Here is a link to a shared folder with my files:

https://drive.google.com/drive/folders/12_1Gy-eO--fI6P0wgv8WCIAsbLIgJR1h?usp=drive_link

It contains my iPhone video (IMG_3473_trim2.mov), the pte project file, the published mp4 file and a screenshot of the publish settings.

I hope this helps you to find the cause of these problems.

 

[Igor]

Hi,

Thanks for sending us the sample video. I guess that IMG_3473_trim2.mov is an original video file from iPhone 13 Pro.

Honestly, this issue would be hard to fix.

This video file has a variable frame rate. Mediainfo shows average frame rate = 29 (it varies from 7 to 31). It seems that PTE AV Studio tries to synchronize playback with a monitor frequency. Probably we incorrectly detects the basic frequncy for the playback.

Also I noticed that MPC-HC player on a PC, VLC, and QuickTime on Mac play differently this video. 

QuickTime and VLC skips a half of second at beginning. And I can see more video at beginning with MPC-HC player (at this moment playback is very jerky and frame rate is about 7).

I recommend to record a video with 60 frames per second option. It will help to avoid this issue and playback will be even more smooth. 60p video option is available in Camera settings on your iPhone.

We'll try to improve video playback, however it may take significant time required to explore this issue.

 

[willemx]

Hi Igor,

You are right about the variable frame rate of my iPhone 13 Pro video.

I did some more experiments and used handbrake to convert the video into a constant framerate video before importing it in PTE. Then the problem is solved and the published video is fine. This is a lot of work however, because I have many hundreds of videos...

Could PTE not implement the same algorithm as handbrake to convert VFR videos to CFR before publishing ?