So, FFmpeg seems pretty error-tolerant with this command. Just for fun, I converted audio.mp3 into a wav file and tried this: ffmpeg -i video.mp4 -i audio.wav -c:v copy -c:a copy muxed.mp4Īs before, FFmpeg converted the WAV file to AAC and produced the muxed file. Interestingly, FFmpeg converted the MP3 audio to AAC and muxed the file without so much as an informational message. Then I tried this: ffmpeg -i video.mp4 -i audio.mp3 -c:v copy -c:a copy muxed.mp4 To explain, after designating the two input files, the script copies the existing video file as-is (c:v copy), converts the MP3 audio to aac (c:a aac), and muxes the two into muxed.mp4. ffmpeg -i video.mp4 -i audio.mp3 -c:v copy -c:a aac muxed.mp4

I tried the following command string which worked the first time. Mux the H.264-encoded video and newly AAC-encoded audio into a single file.Convert the MP3 file to AAC since MP4 files can’t include MP3 audio.I quickly surmised that I had to accomplish two things. So I had to mux the two to input them into PowerPoint.Ī quick Google search led to a definitive StackExchange article here. Unfortunately, my download tool, wondershare’s excellent video converter, downloaded separate audio and video streams, the video in an MP4 wrapper and the audio as an MP3 file. To resolve this issue, try VLC media player.So, there I was downloading videos from YouTube to include in a PowerPoint for a training course I was producing. MP4 is a container that contains various kinds of data, so when there is a problem opening the file, it usually means that data in the container (an audio or video codec) is not compatible with the device’s OS. On some devices, particularly mobile, opening this file type can be problematic. On Windows, it opens in Windows Media Player. There is no need for third-party software. Simply double-clicking the file opens it. MP4 files open in the operating system's default video player.

Many consider MP4 to be one of the best video formats available today. It is also a popular video format for streaming over the Internet, such as on YouTube. It is compatible with a wide range of devices and operating systems, using a codec to compress file size, resulting in a file that is easy to manage and store. MPEG-4 (MP4) is a container video format that can store multimedia data, usually audio and video.

Ffmpeg mp4 to mp3