I have many hours invested in these encodes so I would love to not have to go through it again. Then click 'Add File' to add the MP4 not opening on Mac. Step 1: Free download this MP4 video converter on Mac or Windows computer and open it. This is my first mac so maybe I am doing something obviously stupid.Īny help would be appreciated. 3 Simple & Easy Steps: Drag & drop, choose output format and then you can enjoy MP4 videos on Mac smoothly without codec problem. What happened? I am not doing anything different that I know of. Also, when I double click one of these mp4 files to try to play it from the desktop I get the message 'The Movie Could Not Be Opened' - 'Invalid Sample description found in file.' I have probably 30 mp4 files sitting on my desktop that I encoded with handbrake and I am unable to import them into my itunes library. Worked fine.īut then I encountered a problem. Occassionally I would add mp4s to my itunes library and test them out, either by playing on imac or syncing with apple tv. So I started the assembly line, ripping DVD's and then queing them in handbrake. I ran the Matrix Reloaded through the process, synced with apple tv, and it worked great. I used the apple tv preset, turbo first pass, and changed audio quality bitrate to 160. I used Mac the Ripper and then Handbrake to convert to mp4. MP4 files open in the operating systems default video player.

So I started ripping and converting DVDs for my apple tv 2.0. VLC could not decode the format av01 (AOMedias AV1 Video) to play a local mkv file.

Cant open mp4 on mac