What is your operating system?
(If you are using Linux, you must state how you installed Shotcut as there are too many builds and packages. In general, we do not make the build installed by your distribution package manager unless it installs the Snap. The developers only build, test, run, and support the builds shown on our download page.)
What is your Shotcut version (see Help > About Shotcut)?
Can you repeat the problem? If so, what are the steps?
(Please be specific and use the names as seen in Shotcut, preferably English. Include a screenshot or screen recording if you can. Also, you can attach logs from either View > Application Log or right-click a job and choose View Log.)
There’s over 50 encoders available to choose from, adding checks for all posibilities for all of them would be madness. The solution is the presets and basic mode, if you need something more advanced… well you go into advanced mode with a bit of open mind and possibility of failure.