This will create intermediate files with some loss in quality because MPEG-2 is lossy compression. I do not know Eyeframe Converter that well. You can use Shotcut for this. Add all the files to a clean Playlist, in Export pick an appropriate lossless or intermediate preset, and choose “Each Playlist Item” in the Export > From field to do batch conversions. Intermediate is slightly lossy to create smaller files than lossless, but not as lossy as MPEG-2.
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