For the MetadataRetriever, for certain queries, after setting up the player to
render a frame (by seeking to the position), sometimes the player will seek to
the same position and ignore the seek, leading to the frame not being captured,
leaving the retriever in deadlock, waiting for the frame forever. This CL adds
a retry timer to avoid this and make sure we can return query result after some
time.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=204460200
7cba5429fc