Prior to ffmpeg version 4.3, the tty demuxer did not have a read_probe function assigned to it. By crafting a legitimate ffconcat file that references an image, followed by a file the triggers the tty demuxer, the contents of the second file will be copied into the output file verbatim (as long as the -vcodec copy option is passed to ffmpeg).
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ffmpeg | Ffmpeg | * | 4.3 (excluding) |
| Ffmpeg | Ubuntu | bionic | * |
| Ffmpeg | Ubuntu | esm-apps/xenial | * |
| Ffmpeg | Ubuntu | trusty | * |
| Ffmpeg | Ubuntu | upstream | * |
| Ffmpeg | Ubuntu | xenial | * |