[Cin] Variable bitrate file processing problems

Hi all! Opened a video file with a variable bitrate - it turned out not very well. Advise what to do to handle such files in the program? I do not want pre-encoding. Video https://yadi.sk/i/pHpGWq4f00yVLA Image https://yadi.sk/i/K9fEyyNnBzT-zQ -- Ugin.