I have imported a 337 MB mp4 video file with no audio into Blender. In Blender, I am primarily just adding audio and then rendering back out to mp4. However, the rendered video quality is drastically lower, making much of the text in the video unreadable. The size of the output file is 65.7 MB.
In this image you can see my output settings:
Can anyone tell me what I am doing wrong? How can I get a higher quality render to mp4?