Perenista
26th December 2020, 14:16
Let's say I have AC3 audio tracks, MP3, or even DTS... if I wanted for example to change their fps from 23.976 to 24 or 24 > 23.976 fps what would be the best software (and way) to do this task, and with minimal loss?
Ideally I want these tracks to remain lossless, but of course if this change implies the other way around, which seems to be the obvious outcome, then I need to know how can this be achieved without hurting quality.
Note: the reason I need to do this change is because I have two recordings from the same content, but:
- If I try to sync the audio track from the 1st file into file #2, it will fail. That's because... let's say the difference between them is 10 seconds at the beginning.
So I could simply use MKVtoolnix to introduce a positive or negative delay of 10 seconds, and that would do the trick, right?
Not in this case. Doing that will only correct, say, the first 30 minutes. As the recording progresses, it will be out of sync again. So the 10 second difference now becomes 12 seconds if I forward into 1 hour.
That can only mean one thing: recording #1 is at a different fps from recording #2.
As such I need to do two things:
1) Change the fps from the audio track based on recording #1, to suit recording #2;
2) After that introduce a positive or negative delay, because recording #2 may have a different logo at the beginning, that accounts for the difference in runtime between the two.
Correcting only the beginning will not suffice if the fps is different. Since both recordings are the same, a different fps is what explains sync issues.
That's why I need a software to change the fps from the audio track extracted from my video.
Ideally I want these tracks to remain lossless, but of course if this change implies the other way around, which seems to be the obvious outcome, then I need to know how can this be achieved without hurting quality.
Note: the reason I need to do this change is because I have two recordings from the same content, but:
- If I try to sync the audio track from the 1st file into file #2, it will fail. That's because... let's say the difference between them is 10 seconds at the beginning.
So I could simply use MKVtoolnix to introduce a positive or negative delay of 10 seconds, and that would do the trick, right?
Not in this case. Doing that will only correct, say, the first 30 minutes. As the recording progresses, it will be out of sync again. So the 10 second difference now becomes 12 seconds if I forward into 1 hour.
That can only mean one thing: recording #1 is at a different fps from recording #2.
As such I need to do two things:
1) Change the fps from the audio track based on recording #1, to suit recording #2;
2) After that introduce a positive or negative delay, because recording #2 may have a different logo at the beginning, that accounts for the difference in runtime between the two.
Correcting only the beginning will not suffice if the fps is different. Since both recordings are the same, a different fps is what explains sync issues.
That's why I need a software to change the fps from the audio track extracted from my video.