#include <QMediaPlayer> #include <QFileInfo>
Understanding QMediaPlayer Supported Formats in Qt 6 / PyQt6
Or in C++/Qt:
For cross‑platform apps, prefer or VP9/Opus in WebM — they are the most reliable.
The formats you can play vary significantly depending on the target OS: Which file formats (or codecs) does QMediaPlayer support? qmediaplayer supported formats
"video/mp4" "audio/mpeg" "video/x-ms-wmv" "audio/x-wav"
Check your Qt build:
Without installing third-party codec packs (like K-Lite or Shark007), support is limited.