Major Changes

Progress is shown in frames

• Click on image for video.
  
• Bar updates after every finished chunk by the amount of frames from the source clip
• Total size of bar is source number of frames

FFprobe deprecated

FFprobe not longer needed for Av1an, all FFprobe calls replaced with FFmpeg.

~25 times faster frame count checking

Redone frame count checking.
Speed comparison for frame count check:
FFprobe: 4.99s
FFprobe with autothreads: 1.039
FFmpeg: 0.209s

Minor changes

• General code improvements
• Console look
• Bugs of fixes