ML = MeshLink()
ML.filename = "D:/ML_Sample/FrameNum/FrameNum_000.obj"
ML.CacheMeshes()
nFiles = ML.GetNumSequenceFiles()
select ML

AlembicExport.AnimTimeRange = #startEnd
AlembicExport.StartFrame = 0
AlembicExport.EndFrame = nFiles-1
exportFile (GetDir #export + "\\alembic_FrameNum.abc") #noPrompt selectedOnly:true using:AlembicExport

resetMaxFile #noPrompt
importFile (GetDir #export + "\\alembic_FrameNum.abc") #noPrompt