tree 186079a031efc304cc8c2f9ef5c4a8f08335e4ca
parent 36ed5603398593cee5cd66b9997f9618720d0fb5
author Philipp Hancke <phancke@microsoft.com> 1699266510 +0100
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> 1699532890 +0000

Make frame transformer MimeType pure virtual again

after both audio and video have been implemented.

BUG=webrtc:15579

Change-Id: Ib52e8f67292259cbf7497a884672de72f3003282
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/326162
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Tony Herre <herre@google.com>
Cr-Commit-Position: refs/heads/main@{#41114}