| Symptom | Best Fix | | :--- | :--- | | Won't open at all | Use FFmpeg remux or MP4Fix online | | Plays but freezes | FFmpeg with -c copy | | Audio/video out of sync | FFmpeg re-encode or Stellar Repair | | Severe download corruption | Redownload with IDM | | Unknown codec error | Install VLC Media Player |
Open Command Prompt (Windows) or Terminal (Mac/Linux). sone054mp4 fixed
Run the following command to copy streams and ignore errors: | Symptom | Best Fix | | :---