The VideoLAN Forums

Hey,
I've been converting a bunch of mkv files to mp4 using VLC lately, and it's been working perfectly. But I've run into two cases where it's not. The difference is that in these two cases, the audio plays, but the video doesn't show up.
Anyone know why that might be?
Thanks!

Hi,
My issue isn't that the converted MP4 files don't play in VLC, but rather that when I convert them, a regular file (audio + video) might be around 500 MB, but the MP4 file ends up being way smaller (about 40 MB), and the video has some kind of issue.
Not sure if anyone else has run into this and found a fix.
Thanks!