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Hi, I get faulty file that doesn't open, when using NVENC and setting faststart to true in MP4 container in Voukoder Pro.

There is a practical compatibility issue with HEVC files encoded via NVENC. By default, Voukoder writes the hev1 codec tag, and such files do not play on iPhones. iOS expects the hvc1 tag – with it, the same file opens and plays without any issues. As a result, after encoding I have to do an extra remux step via ffmpeg just to change the tag using -tag:v hvc1, without re-encoding. This is purely a container-level fix, but it adds unnecessary friction to the workflow. It would be very helpful…