John You did understand nothing ?

What about mp4 codec ?

MEP 15 will import mp4 files directly (assuming you have activated/purchased the mp4 codec).

I didn't write anything about mp4 in connection with MEP, only mp3 !
As well i could write:

I convert MyFilm.wmv to avi movie
or
I convert MyFilm.mov to avi movie

What about convertion to AVI ?

I do not understand the need to convert to AVI before importing into MEP

I didn't write anything about conversion to AVI with MEP !

I convert one video movie to AVI with different Video and Audio codec to check why MEP don't open sound importing AVI files. And I found that MEP don't open sound importing AVI if in AVI container is sound in mp3 format.

I described the conclusions !

When importing them  to Magix Movie Edit all movies with mp3 and mp2 sound, lose sound ( sound is not importing ) in Magix timeline is no sound, and hear nothing.

PCM or AC-3 sound are importing properly.

John if it mix Your mind just forget it !

I just have few avi video which i wanna import in MEP to edit and join with others importing videos.

Do You know what I am supposed to do for importing AVI video with mp3 sound in it properly ?

Is any connection betwen activation mp4 codec and abbility to import any video with mp3 sound ?

Finally - i found next version of MEP as application with worst interface - les friendly for user with strange changes and less ability.

Of Course i could first convert avi with mp3 sound to avi with PCM or AC-3 and then import to MEP but you yourself wrote:

I do not understand the need to convert to AVI before importing into MEP - you are losing quality at every conversion.

Hi 

The 'confusion' is caused by the first line in your original post :

. . . . I convert MyFilm.mp4 to avi movie . . . .

Tells me you are starting with a mp4 format video and converting it to AVI - everything after that statement details all the options you have tried in the conversion process and which has worked and failed - these may have been caused by the conversion process and incorrect bitrates for the audio.

That is the reason I asked why you were converting from mp4 to AVI.

Your newer explanation is much clearer and indicates you have a probable codec issue which is not so easy to diagnose.

   -  Have you been able to import video with mp3 audio and it has now stopped working?

   -  Can you import a mp3 audio file?

   -  Have you installed any other software eg video player, codec packs or other video editing software after the installation of MEP?

   -  What are audio codec settings for the video with mp3/mp2 audio which will not import? You can use GSpot or MediaInfo to analyse a clip to get these settings

John

Check all around: check lame even change from 3.97 to 3.99.5.

   -  Have you been able to import video with mp3 audio and it has now stopped working?

I do not know about, cause i dont check other video files which can have mp3 sound eg. mov, rmv or rmvb ??? Video avi with mp3 not working all the time from the beggining.

   -  Can you import a mp3 audio file?

Yes I have no options so I demux mp3 from avi with Avidemux without re encoding and import mp3 to MEP separately - but this just suck, not good work with good program.

   -  Have you installed any other software eg video player, codec packs or other video editing software after the installation of MEP?

Not, MEP was the last and I also check on clear win XP sp3 only with lame, wmv9VCMsetup_v9.0.1.0369.exe and WMEncoder_9.00.00.2980(XP)

   -  What are audio codec settings for the video with mp3/mp2 audio which will not import?

Any You want stereo and mono from 96 to 192 kbps.

Haven't you see what I wrote:

Others movie edititing application like Sherif movie, AVS video, Video movie Magic import all avi movies with all sounds propely.

Do You have any idea about solution or only bother.