Here are a list of known bugs as of version 0.9.29.

• Youtube videos can ocassionaly freeze or stutter due to slow frame grabbing over the network.
• Seeking in some Youtube videos seem to fail at 1080p.
• Some videos, due to how they were encoded, cannot their frame count extracted with 100% accuracy. The extracted number usually differs from the real number by a few frames. If a completely accurate count is required, use video._get_real_frame_count() or preload the frames.
• Some videos when played as bytes cannot have their frame size read properly. This will cause an exception.
• Some videos when played as bytes cannot have their frame time stamps extracted, which means VFR videos cannot be read as bytes.
• When using the decord reader to play a video with multiple video tracks, the first track will not be selected, causing side effects and potential exceptions. Use any of the other three readers instead.
• FFmpegReader can sometimes cause a resource leak (unconfirmed, still needs more investigation)
• Cannot use Decord as a backend to play webm or av1-encoded videos (Decord limitation)
• High FPS videos hit a limit around 50 fps with default audio backend. Must use pygame audio to achieve full FPS