This is an usual error while using neteq_quality_test. This tool does not support wav files as input. Adding a validation. Bug: webrtc:10690 Change-Id: I18ed308d2f688106728df5df25e0a58c7170f411 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/139104 Commit-Queue: Pablo Barrera González <barrerap@webrtc.org> Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28141}