as the title says, im trying to mass-merge videos and audios with the same name together in ffmpeg

I tried

for %%A in (*.adx) do ( for %%B in (*.m2v) do ( ffmpeg -i %%A -i %%B %%B.mp4 ) )

but while it does change the video it works on, the audio remains the same. For example, if i have A, B and C in .adx, and A, B and C in .m2v, the result will be that all 3 videos (A, B and C) use the audio A.