Is there a way to change the timeline seconds? For syncing.

jake-h wrote on 10/25/2024, 1:32 AM

Let me try to explain this a bit better. When I move tracks, they move more than a signal frame, I wanna know if there is a way to make this possible. The issue is when I try to sync audio it is always out of sync by a millisecond. Even for video. I am very particular about syncing.

See the blue line indicators? I know I am zoomed out, but when I zoom in and move tracks, the file is move like a full second, I want to change this so it moves by milliseconds so I can sync up the source correctly.

Comments

johnebaker wrote on 10/25/2024, 2:49 AM

@jake-h

The time scale cannot be changed, however VPX 16 does allow audio to be move and placed between frame boundaries, you must zoom in sufficiently to do this as shown below.

Achieving single figure milli second accuracy is not possible.

The international standards for video consider audio to be out of sync between 15 and 125 ms depending on the standard used.

There is also the natural delay to take into account, eliminating this can, depending on the visuals, result in an un-natural experience, eg fireworks displays shot from a distance.

HTH

John EB

jake-h wrote on 10/26/2024, 4:27 AM

@jake-h

Hi

The time scale cannot be changed, however VPX 16 does allow audio to be move and placed between frame boundaries, you must zoom in sufficiently to do this as shown below.

Achieving single figure milli second accuracy is not possible.

The international standards for video consider audio to be out of sync between 15 and 125 ms depending on the standard used.

There is also the natural delay to take into account, eliminating this can, depending on the visuals, result in an un-natural experience, eg fireworks displays shot from a distance.

HTH

John EB

Thanks for the info! I really appricieate it!

Bol wrote on 10/26/2024, 6:30 AM

@jake-h

Hi Jake,

As @johnebaker already indicated, it is not possible to change the timescale. But you can sync audio and video to a frame accuracy. Do the following: "right click on the audio track and choose Set audio-video offset"

Addition to: 14:52

This can be used to correct any time difference between sound and image. A positive offset value shifts the audio material back, a negative one shifts it forward.

HTH
Greetings,
Rob

browj2 wrote on 10/26/2024, 9:40 AM

@Bol

Hi Rob,

What @jake-h wants is to be able to adjust the audio to less than 1 frame, which can be done as @johnebaker has shown (in VPX, not in MMS).

I don't know what the precision is (probably the sample rate), but you can slide the audio to be less than 1 frame. In the image below, if I did my math correctly, I have an image that is 1 frame long on track 1 which is 40ms at 25fps. The image is divided into 40 intervals (39 spaces), so the line intervals are 1ms. You can see that I have dragged the audio about 4ms from the start of the image. I can freely drag the audio even within a 1 ms interval.

In Movie Studio, you can only move the audio 1 frame at a time; not so in VPX.

John CB

Bol wrote on 10/26/2024, 11:14 AM

@browj2

Hello John CB,

.....What @jake-h wants is to be able to adjust the audio to less than 1 frame, which can be done as @johnebaker has shown (in VPX, not in MMS).....

About the above writing, we don't need to have a discussion about that, I agree wholeheartedly.

I myself film at 1920x1080 50 f/s and then 1000 ms / 50 frames = interval 20 ms per frame. Personally, I think that an interval between 1 and 20 ms is barely perceptible to our naked eye and hearing.

Hence John EB's comment: "The international standards for video consider audio to be out of sync between 15 and 125 ms, depending on the standard used".

If @jake-h really wants to set it to 1ms accuracy, then John EB's solution is the only and correct solution.

Best wishes,

Rob

jake-h wrote on 10/29/2024, 11:01 PM

@jake-h

Hi Jake,

As @johnebaker already indicated, it is not possible to change the timescale. But you can sync audio and video to a frame accuracy. Do the following: "right click on the audio track and choose Set audio-video offset"

Addition to: 14:52

This can be used to correct any time difference between sound and image. A positive offset value shifts the audio material back, a negative one shifts it forward.

HTH
Greetings,
Rob

This seems to be the best solution, thanks to all of you for helping!!

Bol wrote on 10/30/2024, 9:50 AM

@jake-h

Hi Jake,

I am glad to hear that the Set audio-video offset is the best solution for you.

Thanks👍 for your feedback.

Good luck with syncing your movies

Best wishes,
Rob