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audio crossfade problem

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kwoot
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audio crossfade problem

Fri Sep 05, 2014 6:30 pm
Hi,

(using ubuntu 14.04 with kdenlive 0.9.8 from ppa.),

When two audio tracks overlap only the one above can be heard.
Audio tracks are NOT added together.

Help!

Kind regards,

Jeroen Baten

p.s. if you like I can send you the project file so you can test it.
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ttguy
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Re: audio crossfade problem

Fri Sep 05, 2014 9:21 pm
Works for me. Two .mp3 tracks on audio tracks and overlapping - I hear both tracks mixed. Check that you do not have one of the trackes muted!
Tracks can be muted using the track header (3) in this pic https://userbase.kde.org/Kdenlive/Manual/Timeline
Image

Or maybe you have a mute effect on the track.
kwoot
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Re: audio crossfade problem

Sat Sep 06, 2014 8:18 am
So I made a screenshot and rendered to a clip.
How can I make them accessable here?
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ttguy
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Re: audio crossfade problem

Sat Sep 06, 2014 2:59 pm
kwoot wrote:So I made a screenshot and rendered to a clip.
How can I make them accessable here?

Post to an image hosting site and then post a link in a reply
kwoot
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Re: audio crossfade problem

Sun Sep 07, 2014 9:35 am
Image

View My Video

Audio of music track gets chopped off and back on. Why?
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ttguy
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Re: audio crossfade problem

Mon Sep 08, 2014 12:40 pm
Picture tells a thousand words !!!!!

It gets chopped off becasue you fade one track out to silence before you fade the other track in.
This is easily fixed though. Just move one of your audio tracks from audio track 4 to audio track 3 and place them so the end of one overlaps with the begining of the other. Then the audio will cross fade between the two.
kwoot
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Re: audio crossfade problem

Mon Sep 08, 2014 2:20 pm
If you are right, then why do I only hear the voice of the person (audio track 1) and no fadding music?
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Minga
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Re: audio crossfade problem

Mon Sep 08, 2014 11:17 pm
Jeroen, I notice that you muted audio track 2. Have you got the same issue with all tracks unmuted ? Have you tried other audio formats, like wav ? And have you tried a test case without any effects and even without video, just to test the audio superposition ? Maybe these kind of tests would help.


The true bravery is to do what is fair.
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ttguy
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Re: audio crossfade problem

Tue Sep 09, 2014 2:16 pm
Do you get the audio track mixed with music in the absence of the fade effects?
What about when the music is on Audio track 2 ?
kwoot
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Re: audio crossfade problem

Tue Sep 09, 2014 7:49 pm
Minga wrote:Jeroen, I notice that you muted audio track 2. Have you got the same issue with all tracks unmuted ? Have you tried other audio formats, like wav ? And have you tried a test case without any effects and even without video, just to test the audio superposition ? Maybe these kind of tests would help.


If all tracks are unmuted the behaviour stays the same.
I have not yet tried another format. Currently using mp3.
If I start a new project the behaviour is as to be expected. Both tracks 1 and 2 are heard at the same time.
kwoot
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Re: audio crossfade problem

Tue Sep 09, 2014 7:51 pm
ttguy wrote:Do you get the audio track mixed with music in the absence of the fade effects?
What about when the music is on Audio track 2 ?


without fade effects I still have the same unwanted behavour.
I can not put the music in audio track 2 because it earlier has the soundtrack of a clip that needs to stay silent.
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Minga
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Re: audio crossfade problem

Tue Sep 09, 2014 11:43 pm
kwoot wrote:I can not put the music in audio track 2 because it earlier has the soundtrack of a clip that needs to stay silent.


1) You can mute just a part of a track with the sound effect "mute" on one sequence instead of muting a whole track, if needed to test what ttguy said.

2) I see that you have a mp4 on audio track 1. I've encountered some unwanted muted issues with the same kind of type mismatch. May be you can try to remove your mp4 sequence and replace it by the sound only (mp3 or another sound-only format, not a container) on track 1.


The true bravery is to do what is fair.
kwoot
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Re: audio crossfade problem

Wed Sep 10, 2014 7:44 am
Minga wrote:
kwoot wrote:I can not put the music in audio track 2 because it earlier has the soundtrack of a clip that needs to stay silent.


1) You can mute just a part of a track with the sound effect "mute" on one sequence instead of muting a whole track, if needed to test what ttguy said.

I just tried this. I used the mute effect on audio track 2 and unmuted the whole audio track.
Now the first part of the clip is completely silend allthough there is a background music on audio track 4 that used to sound before.

2) I see that you have a mp4 on audio track 1. I've encountered some unwanted muted issues with the same kind of type mismatch. May be you can try to remove your mp4 sequence and replace it by the sound only (mp3 or another sound-only format, not a container) on track 1.


Do you mean to say I need to convert all mp4 clips to another format? What format is better than?

p.s. and thanks for helping me.
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ttguy
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Re: audio crossfade problem

Wed Sep 10, 2014 9:44 am
I tried to reproduce your timeline setup. This is what it did
Image

But I get the audio from dog_rotatedxxx.mp4 mixed with the fernando.mp3 track no problem.

I have done "split audio" on the dog_rotatedxxx.mp4 which is what you appear to have done.

So I dunno what to say about this.

I would try from a brand new project to see if this is a reproducible issue for you .

I think you can charactrise your problem as "audio from two audio track fails to mix" rather that "cross fading problem"

See if you can just set up two audio tracks in a new project and see if when you preview them the audio mixes together.
kwoot
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Re: audio crossfade problem

Thu Nov 06, 2014 11:59 am
Hi,

Just want to give you a small update on what I found.
I have recently been doing a lot of work in kdenlive 0.9.10.
So, the chopping effect on audio channels happens, but it doesn't happen always.
If you put two tracks on top of each other (no channels in between) it works good.
When there is one or more audio channels between the audio tracks sound gets chopped of.

I hope this helps on narrowing it down.

At the moment I can work around this issue by moving soundclips from one track to another.
But it is still weird :-)

Kind regards and thanks for a wonderfull piece of software!

Jeroen Baten

(see http://youtu.be/rQIB6o-b7Mw for my latest kdenlive production)


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