ffmpeg error when create_dataset.py

[MagicLizi]

• OS: macOS
• Device CPU
• Setup Info PyTorch 0.4.1, Python 2.7

When I deal create_dataset.py
ffmpeg report so much erorr as
Application provided invalid, non monotonically increasing dts to muxer in stream 0: 1 >= 1

[xiedidan]

Setting ffmpeg -vsync to 1, 2, or drop seems to partly solve this problem. But they all drop frames if any timestamp (DTS/PTS) is incorrect.
With -vsync drop, I got 6947 training clips from adobe240fps.
Even with the latest ffmpeg master branch, this problem persists. I suspect we couldn't reproduce the same result as the author's. I'll try to modify dataset creation script to extract frames with opencv video stream...

[xiedidan]

Opencv extracted 8488 training clips, there are two videos dropped most of their frames - IMG_0179.m4v and GOPR9658.MP4, while most of the videos drop a small partion of frames.
Since IMG_0179.m4v and GOPR9658.MP4 do look problematic with MPC, I'm happy with the opencv results.

[devanshbatra04]

@xiedidan can you please share what modifications are to be done to use OpenCV? I am running into the same issue.