If you're having trouble with video quality after conversion, there are a few things that you can do. First of all, make sure that the video and audio files are of equal size before starting the conversion process. If not, it may cause problems with playback or errors during conversion. Another thing that you can try is to use various tools and plugins available online. These tools can help smooth out the video quality or even convert it to mp3 format. Make sure to test different options before settling on a particular solution as some might work better than others. And finally, don't forget to save your file regularly in case of any unexpected glitches during conversion.