Results differ for different codecs and bitrate
**Describe the bug**

I am getting different diarization results when I modify the codec and bitrate of a video and then convert that into an audio file.

**Steps/Code to reproduce bug**

Take any yt video
Download in 2 different resolutions(1080p and 480p)
Convert into audio file and run speaker diarization.
Now, convert the lower res video into MPEG4 format using ffmpeg -i <inputfile> <outputfile>
Results for this will change
Manipulating codec will also change results

**Expected behavior**

Same results always or always increasing bitrate should give better resuts


