1.0.0-beta.7

Fixed

• H.264 MP4s with B-frames whose muxer left out their display times
  (no ctts box) no longer jump back and forth between frames or drop a
  frame every keyframe interval.
• H.264 and HEVC MP4s whose keyframe index is wrong (it lists P frames
  or leaves out keyframes) now play from the start and seek to real
  keyframes without FFmpeg (the plugin's default on Windows). On Windows
  they showed a still picture until the first keyframe listed, up to
  30 s in, and seeks could lose hardware decoding.
• Windows: multichannel AAC whose channel layout is given by a program
  config element no longer crashes the app in builds without FFmpeg; its
  audio is skipped instead.