Help with Video/Audio Compilation

[Jeffx]

Fellahs

I have a 25FPS Video from which I have deleted the Russian Dubbed Audio.
I also have a 24FPS Video which has an English Audio.

So now I want to place the English Audio track on the Silent Video and Sync same.

Can anyone kindly give me a step by step Tute on how this can be done.

I have installed Audacity but I only have a basic knowledge of it.

Jeffx

[ProWo]

Read this: https://forum.videohelp.com/threads/398162-29-97-fps-to-23-976fps-audio-with-length-di...nt#post2590054

[butterw]

what you are trying to do doesn't work well in practice (sync issue).

Check if your 2 video files have the exact same length. If so you can try to demux and remux the desired audio track with ffmpeg or mkvtoolnix.

[johnmeyer]

In Audacity, you just stretch or shrink the audio you want to use so it matches, exactly, the length of the video you want to use. You then mux that altered audio with the video. You can either let audacity change the pitch of the audio or keep the pitch the same.

That's all there is to it. Once you know how to do it, the whole operation will take about two minutes of your time (neglecting the time the computer has to "crank" to alter the audio length and then do the muxing).

[Jeffx]

Johnmeyer Sir

I understand the theory bit re Constant Frames and shrinking Audio and such.

It's the knowing how to do it that's the problem.

Any help/instruction would be greatly appreciated.

Jeffx

[johnmeyer]

Can't you just read the manual? I use iZotope & Sound Forge, but not Audacity so I can't provide instructions. However, it is a pretty straightforward operation that you should easily be able to figure out by reading the manual. No one here is going to be able to tell you anything different than what is already there.

https://manual.audacityteam.org/man/change_speed.html

[Jeffx]

Johnmeyer Mate

Have you seen the size of the Manual.
Bugger me it would take just about all of my few remaining years to get past the introduction.

Anyway here is what I've got so far using AVIDEMUX to cut by Frame

24FPS Video from I have taken the MP3 Audio I need (length 2.22.30.832)
25FPS Video from which I have deleted Dubbed Audio (length 2.16.50.160)

Any clues as to what I do next.

Jeffx

[butterw]

You have a 6minute (4.4%) difference in length between your 2 versions of the video. Where is the difference ?
If your russian dub is not the exact same scene cut/edit, you will get poor sync.

I would not recommend using avidemux to demux audio.

Regarding audio duration stretching (and pitch shifting) in Audacity: maybe someone who uses this method regularly can answer you here, if not I'm sure you can easily find the answer with some googling (Change Tempo ? https://manual.audacityteam.org/man/change_tempo.html). If needed you could also open another thread with a more relevant title and link to it.

[Jeffx]

Lads

Has anybody got a little program that will Shrink a 142.30 minute Audio Track to a 136.50 minute Audio Track without

causing any sound distortion.

Seems Audacity is a good stretcher but a lousy shrinker.

First one to come up with a method that works gets a copy of the Video.

Jeffx

[ProWo]

Try my clever FFmpeg-GUI (read the HowTo.txt on first use).
Load your 24fps video, click on Main, click on Modify Audio Stream, click on Continue, set AAC or AC3, set Bitrate, on Change Audio Lenght input 24 (as Source FPS) and 25 (as Target FPS), set Lenght & Pitch, click on convert.
Click on Multiplex, set your 25fps video (as Video Source) and the new created Audio file (as Audio Source) and click on Multiplex. Done.
Check if video and audio are synchronous, e.g. in VLC. If there is an A/V delay, remux the two tracks with this value.

[johnmeyer]

Johnmeyer Mate

Have you seen the size of the Manual.
Bugger me it would take just about all of my few remaining years to get past the introduction.

Anyway here is what I've got so far using AVIDEMUX to cut by Frame

24FPS Video from I have taken the MP3 Audio I need (length 2.22.30.832)
25FPS Video from which I have deleted Dubbed Audio (length 2.16.50.160)

Any clues as to what I do next.

Jeffx

I think you are either trolling or else being extremely lazy. To find things, you use the search feature or use the index (that manual does have an index.

But if you are too lazy to do that, you click on the link I provided!!!! Come on, is that too much?? I provided the answer.

In this country we have an expression, "you can lead a horse to water, but you can't make him drink." You've been led to the edge of the pond, and if you actually aren't thirsty and don't want to drink, then no one can help you.
-----------------------------------------

P.S. If you want something that will stretch or compress audio, with or without pitch correction, and which will produce a result that is sonically pure (i.e., it sounds great), iZotope RX is what I use and it produces amazing results.

It is far from free, however. Despite the considerable cost, they do have a 10-day free trial:

https://www.izotope.com/en/products/rx.html

[Jeffx]

Johnmeyer Mate

Have you seen the size of the Manual.
Bugger me it would take just about all of my few remaining years to get past the introduction.

Anyway here is what I've got so far using AVIDEMUX to cut by Frame

24FPS Video from I have taken the MP3 Audio I need (length 2.22.30.832)
25FPS Video from which I have deleted Dubbed Audio (length 2.16.50.160)

Any clues as to what I do next.

Jeffx

I think you are either trolling or else being extremely lazy. To find things, you use the search feature or use the index (that manual does have an index.

But if you are too lazy to do that, you click on the link I provided!!!! Come on, is that too much?? I provided the answer.

In this country we have an expression, "you can lead a horse to water, but you can't make him drink." You've been led to the edge of the pond, and if you actually aren't thirsty and don't want to drink, then no one can help you.
-----------------------------------------

P.S. If you want something that will stretch or compress audio, with or without pitch correction, and which will produce a result that is sonically pure (i.e., it sounds great), iZotope RX is what I use and it produces amazing results.

It is far from free, however. Despite the considerable cost, they do have a 10-day free trial:

https://www.izotope.com/en/products/rx.html

Johnmeyer

This is the second time you have had a go at me Mate but I am nothing, if not a forgiving sort of a bloke.

But Pal it's a bit of a low blow to bring up my drinking problem.

So you have "provided the answer" but you seemingly haven't understood the question.

I don't want to "compress" the audio track. In this Country that means to reduce it's size.

I want to Shorten/Shrink it.

Regards
Jeffx

[Jeffx]

Try my clever FFmpeg-GUI (read the HowTo.txt on first use).
Load your 24fps video, click on Main, click on Modify Audio Stream, click on Continue, set AAC or AC3, set Bitrate, on Change Audio Lenght input 24 (as Source FPS) and 25 (as Target FPS), set Lenght & Pitch, click on convert.
Click on Multiplex, set your 25fps video (as Video Source) and the new created Audio file (as Audio Source) and click on Multiplex. Done.
Check if video and audio are synchronous, e.g. in VLC. If there is an A/V delay, remux the two tracks with this value.

ProWo

Thank God at last someone who makes sense. The FFmpeg sounds like the go but I am having a problem installing it as my Bitdefender does not like it.
I have checked the Internet for install instructions but they all seem to be for older versions.
Is there a "How To" for the Current Version.

Thanks
Jeffx

[ProWo]

The HowTo is into the 7zip file.

[johnmeyer]

I don't want to "compress" the audio track. In this Country that means to reduce it's size.

I want to Shorten/Shrink it.

Yes, I fully understand that, and each of my posts concerned the length of your audio (i.e., how many seconds it plays for), and nothing I wrote had anything to do about the size of its file. I apologize for using the word "compress" which does indeed get used to mean both things. However, the entirety of my post made it quite clear what I was talking about.

I did indeed take a very minor "go at you" in my last post because I am a stranger who is sincerely trying to help you, and yet you completely ignore my advice which, by the way, is quote correct. I have lengthened and shorted hundreds of clips over the years, and have done it using several different programs. What is aggravating, and why I made the statement I did, is that you don't seem to have made any effort whatsoever to follow up on any of my advice, or any of the other advice given in this thread.

Did you read the 1-2 paragraphs of the Audacity manual? Did you look at iZotope and download it?

You can also use any version of Magix Vegas and, if you can still find it, the old Sonic Foundry Sound Forge. Pretty much any sound editing app can do this operation. BTW, in many applications, you can just grab and drag the end of the audio clip and, while holding the shift, Ctrl, or Alt key, lengthen or shorten the clip. You might try that in Audacity.

[davexnet]

Is the sound quality in Audacity that bad? Use "change tempo" and you can select "use high quality stretching".
Set the new length in seconds and that's it. Here's some samples, the source and two processed files one in Audacity the other in
Prosoniq Timefactory converted to mp3 in Audacity using Extreme 220-260. To my ears, for music, Audacity is clearly the poorer of the two.