dancho aadcbe332b Ensure single-frame videos are correctly exported
Add a wait in DefaultCodec.signalEndOfInputStream when no
video encoder output has been seen. This avoids a thread synchronization problem
between writing frames to video surface, and signaling end of stream,
which was hit for video input of only one frame on some devices.

PiperOrigin-RevId: 637844690
2024-05-28 04:00:01 -07:00
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