In addition to the changes in https://github.com/google/ExoPlayer/commit/b18fb368cca9843aeca2cc4d5a01aa4fa41b4bd7
This change essentially reverts https://github.com/google/ExoPlayer/commit/30e5bc9837e2423cd2bb426c5797211e0f6ad76b (Merged Jul 2022).
From this CL on, `VideoFrameProcessor` takes in non-offset, monotonically
increasing timestamps. For example, with one 5s and one 10s video,
- `VideoFrameProcessor`'s input should start from 0
- On switching to the second video (10s), the timestamp of the first frame in
the second video should be at 5s.
In ExoPlayer however, `streamOffset` is managed differently and thus needs
correction before sending the frames to `VideoFrameProcessor`:
- The timestamp of the first video is offset by a large int, so the first frame
of the first media item has timestamp (assuming) 10000000000000000
- The last frame of the first media item has 10000005000000000
- At this point the stream off set is updated to 10000005000000000
- The pts of the first frame of the second video starts from 0 again.
PiperOrigin-RevId: 523444236
