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We lost H264 [1] in https://webrtc-review.googlesource.com/c/src/+/327260 where we started using QueryCodecSupport which is sensetive to SDP parameters. Use CBP3.1, packetization_mode=1 (singlecast NALU) as defaults. [1] https://chromeperf.appspot.com/report?sid=1e12d661147889123ddeea4ef88a87bcdd38cf09cb23c13ee130770be695ac83&start_rev=41064&end_rev=41226 Bug: webrtc:14852, webrtc:15779 Change-Id: I69137ac847ae3a79238abcfe2a76dc2ba097a06d Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/335081 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41576}