Before, we converted the WebM configuration to MP4 in the video
client, however this lead to a bug when fields were missing. So
now don't convert until the cluster parser so the extra info from
the stream can be added.
This also fixes a bug where the value was not printed in the warning
logs.
b/29580732
Change-Id: If0a1a4d135f98292cdaae15a11027f42d844e85d