Timestamp & Convert Video Files

I have three simultaneous camera + audio feeds of the same event. Your task is to open each recording, note the exact frame or timecode where every stream begins and where it ends, and jot those four numbers per stream into the Excel sheet I provide. From experience this takes no more than fifteen minutes per set, so accuracy matters more than speed.

A separate but related job runs in parallel: dozens of clips currently encoded with AC3 need to be batch-converted to MP4 so they play reliably on Windows machines. HandBrake or VLC are fine; the end files must retain original resolution and sync. Here is a sample - https://u.pcloud.link/publink/show?code=XZUOLt5ZbG8CHFFPemRmCGu4sf1NFbk4Ls70

Deliverables
• Updated spreadsheet with start-and-end times for each of the 3 streams in every set
• Folder of MP4 outputs, same filenames as source, verified to open in Windows Media Player

That’s it—no creative editing, just precise timestamps and clean conversions.