VSE correcting framerate without shortening strips or changing the speed of strips currently I'm editing a small movie in Blender VSE and I've accidentally choosen the wrong framerate (50 fps instead of 25) as I started and now when I want to correct it, my sound strips end up shorter than the video strips (also with higher pitch).
How can I correct the framerate without changing the sound or how can I adjust the sound so that it is the same length and original speed?

Thank you.

My Question is not a duplicate...
My videos are 25 fps interlaced and when I started my project in blender I've accidentally choosen 50fps. Now when I leave it on 50fps and render it, the sound is in the right speed but the video is faster (but in the video sequence editor the length of the strips are the same) and when I change it to 25fps the sound ends up half the length, are faster and with pitch (and only fill half of the time) but the video is the right speed.


on this picture are the strips where I've choosen 50fps in the properties (rendered sound is ok but video is to fast)


and on this picture are the strips, where I changed it to 25fps (sound to fast but video ok)
Make a new vse template in blender.. 
Import the videos again one by one .. Blender will automatically set your project FPS to that of the video content you import.. 
This will also be concurrent with the length and sample rate of the audio associated with the video