He tried to pause the file, but the "work" of the code had already begun. The MP4 wasn't just a recording; it was a .

The MP4 is a container (like a box). Inside the box is video (usually H.264 or H.265/HEVC) and audio (AAC or MP3). If your operating system or media player lacks the decoder for the internal codec, the file won't work.

I should check if "Sone052mp4" is a real person or a typo. Maybe the user meant a different name or a specific study. Also, "mp4" usually refers to video files, but in a research context, it might not fit. Perhaps there's a misunderstanding here. The user might be referring to a paper or a dataset but misspelled it.

untrunc -s reference.mp4 sone052mp4_work.mp4