Why aren't my mp4. Files' audio and video synced?
As of recently, I have started using Hitfilm 3 Express. The camera I used to own is now broken, and since I'm saving up money for something more important, I can't buy a new one right now so instead I'm using my IPhone 5s to record videos. When I go to download my videos that I sent through my email and put them into Hitfilm 3 Express, the audio is faster than the video, and the length of both tracks are the same. Since I admittedly changed the file extension name from.mov to.mp4, I figured that had to be the problem, however I uploaded one of my videos to facebook and it played the audio and video synced on both my mobile device and computer. I then tried to download my video directly from facebook in a.mp4 format however the same problem came up again. Clips I have downloaded from elsewhere do not have this problem. Is there a way I can get the audio and video synced from my Iphone, or do I just have to get a camera?
I had the same issue and what it was is this. There are things called CODECS and they basically need to be downloaded. I would look for a codec pack and download the latest there also is a forum you can learn and they have software there that helps see below
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