ffmpeg is rarely used directly for the conversion, but it is essential for preparing the video streams. It is used to demux the BL and EL tracks from the MKV container into a raw format that dovi_tool can understand and process.
The conversion typically involves "stripping" the RPU from the Profile 7 enhancement layer and "injecting" it into the Base Layer, while discarding the video portion of the EL. convert dolby vision profile 7 to profile 8 new
Use dovi_tool to pull the metadata from your original Profile 7 file. This step identifies the dynamic instructions intended for the display [6]. ffmpeg is rarely used directly for the conversion,