mpeg-2 to mp4

[cell166]

I am a super newbie to Avidemux.  When I trim an mpeg-2 video and output the edited video to mp4, I get the following error message:  "Only MP4Video, H264, and H265 supported for video".  Am I missing a step?  Thanks!

[eumagga0x2a]

As the error message says, you can't keep the MPEG-2 codec in a MP4 (or MP4v2) container. If you wish to avoid re-encoding, select Mpeg-PS (.mpg), Mpeg-TS (.ts) or MKV (.mkv) as muxer/output format. If you insist on MP4 or MP4v2, you will have to re-encode video, e.g. into Mpeg4 AVC (x264) and probably also the audio into AAC.