To be honest, not many apps can merge MP4 and M4A automatically and seamlessly. However, when you finish downloading separated files, you will need to merge them together in order to stream it as a whole, that being said, with video and audio files in parallel during playback. Part 1: Why Download Video and Audio Files Separatelyĭownloading video and audio files separately turns out to be more efficient and more popular nowadays. Part 6: Check and Play Merged Video with Ease.Part 5: Merge MP4 and M4A Files into One with Clideo.Part 4: Merge MP4 and M4A Files into One with AimOne MP4 Cutter & Joiner.Part 3: Merge MP4 and M4A Files into One with Leawo Video Converter.Part 2: Merge MP4 and M4A Files into One with ffmpeg.Part 1: Why Download Video and Audio Files Separately.Have you experienced the fast video playback bug on macOS? Have you found a better solution? Sound off in the comments below with your observations. A few of the users that I have talked to who have encountered this bug regularly use Apple’s professional media apps like Logic Pro X and Final Cut Pro X. In my case, I’m using an external audio interface, but others have expressed to me that the bug occurs without using an external interface. If fixed, video playback should go back to normal with sound and with standard 1x playback speed.Ī restart will fix the issue as well, but restarts take a lot more time than simply restarting the core audio daemon via Activity Monitor. Afterward, close Activity Monitor, and try to play back a video. Once coreaudiod restarts, it will reappear under the CPU tab.

This will kill coreaudiod, but it should restart immediately. Click the ‘X’ button in the upper left-hand corner, and select Force Quit. To fix this issue, open Activity Monitor and under the CPU tab find the coreaudiod process. Subscribe to 9to5Mac on YouTube for more videos Fixing the fast video playback bugīefore doing anything, be sure to save any work that you have open.

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