2/25/2023 0 Comments Cant open mp4 on macOne more thing if you have a mp4 file that came off a camera and has a m2ts extension then you might have to use VoltaicHD shareware to convert it to something quicktime can understand. if you have a trouble file you may want to look into Handbrake, or ffmpegX as additional software for your video needs ffmpeg is a staple on both Mac and PC platforms and can help you convert or identfy many video formats. Also installing Perian on your system will give you better playback performance as listed by one of the other posts. Now some of the other suggestions are viable here such as using VLC to verify the video and audio codecs since mp4 file formats is a container format that can have differen tvideo and audio codecs however I beleave that the 2 most common for mp4 are AVC (h.264) and mp4 native are only used for that container. Since Mpeg Streamclip uses quicktime for it's format conversion and playback on the Mac. The problem here is not MPEG Streamcilp it is your Quicktime Componets the Componets determine which formats quicktime can handle. Another is we have tried this same snippet on Linux and Mac and it seems to work fine, meaning it is able to read both mp4 files and avi files.
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