I am able to repro on both Mac and Windows. In the first 3 seconds, video frame halt but audio is normal. When seek or scrub backword to a position earlier than 0:03, the video frame freeze again.
Dale@, can you assign appropriately?

Seems like bad encoding; over to sandersd@ to double check.

It is true that the encoding is bad (the first keyframe is frame 45, which is explicitly not valid for H.264). However, it's also surprising that playback freezes when seeking earlier than 3s when using software decoding.

This file has an audio and video track, both starting at time zero, but no video keyframe until 3s. When playing back, the software decoder displays the 45th frame until audio catches up. When seeking before 3s, audio plays but video freezes until it catches up the the frame that was visible before seeking. This is consistent with dropping frames with an earlier timestamp, but it doesn't explain why preroll fails without a decode error.

I'll leave this bug open and investigate a little more.

this bug has been stale since 4/1/2016. I am marking it as StaleAssigned now. If you still want to keep it, please replace StaleAssigned with StakeKeep. Otherwise, I will resolve it as won't fix. Thanks

this bug has been stale for > 1 year. resolve them as won't fix.
StaleClosed label is added. if the bug owner want to keep it, please r-activate an assign appropriately.