| Error | Likely Cause | Solution | |-------|--------------|----------| | cp: cannot stat 'video.txt': No such file | The text file has a different name (e.g., video_en.txt ) | Use ls to list exact names, then adjust the cp command. | | ffmpeg: Unable to find a suitable output format for 'txt' | FFmpeg expects a subtitle codec, not raw txt | Convert .txt to .srt first (add line numbers and timestamps), then re-run. | | Operation not permitted (macOS) | Privacy protections on the source box | Go to System Settings > Privacy > Full Disk Access and grant terminal access. | | Video plays but no subtitles appear | The txt metadata box is present but not flagged as default | Use -disposition:s:0 default in your ffmpeg command. | | Checksum mismatch after copy | File corruption during transfer | Re-copy using rsync -c (checksum comparison) instead of basic cp. |
Risk Level: Extremely High
The CP-BOX is an "AI Box" adapter that plugs into your car’s existing wired CarPlay USB port. It functions as a bridge, converting a wired connection into a wireless one, and adds a standalone Android operating system to the vehicle's head unit.