Chrome Version: 54.0.2840.33 / 8743.35.0 beta
Device : Stumpy

Steps to reproduce:
1. Start a loopback apprtc call using https://appr.tc/?debug=loopback&vsc=h264
2. Observe local and remote audio/video quality 

Expected result:
Local and remote video should be clear throughout the apprtc loopback call

Actual result:
Remote video is blocky throughout the apprtc loopback call

Feedback submitted for this issue:
https://feedback.corp.google.com/product/208/neutron?lView=rd&lRSort=1&lROrder=2&lRFilter=1&lReportSearch=user:srcv&lReport=13670442293

Notes:
1. This issue is also observed during apprtc peer2peer calls with H264
2. This issue was observed with both wifi and wired network
3. Used Logitech HP Pro Webcam C920 camera for apprtc calls on Stumpy
4. This issue is not observed with apprtc loopback vp8 and vp9 (default) codecs
5. This issue may have the same root cause as the similar bug https://bugs.chromium.org/p/chromium/issues/detail?id=648996 but filing it as a separate bug as remote video is blocky throughout the apprtc call on device Stumpy