Early return will cause `call` to be destroyed outside the worker thread, which gives confusing error messages when all you did was type the wrong path to the input file :)
Bug: webrtc:14508
Change-Id: I029910d8da4bc7b08dafd02cb5ebf88d9c7afa59
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/277443
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38254}
3f1150d94d