tree b3abba0f9cae8fe380621133f63936b70b7a73ea
parent 237f9034c6cbe5cbafb0cd4c862d9dddfbdf7389
author Chong Zhang <chz@google.com> 1521578242 -0700
committer Chong Zhang <chz@google.com> 1521654164 +0000

fix crash due to no output format available -- DO NOT MERGE

Output format should arrive before we get first frame, but if
it doesn't, better fail it than crash.

bug: 69924594
bug: 75978033
Change-Id: I057ba49c8f83b9a301d409510717039ad894c391