[skip ci]
Closes #125
because VP8 doesn't understand what "target bitrate" means Closes #124
Closes #127
Closes #123
Hopefully closes #126
For example, if the subtitle stream had a title Ping #122
Closes #122
This reverts commit a8a0fc31. Ping #122
Closes #121
Closes #120 (but has other improvements as well)
Closes #60
[skip ci] Screenshot has been due an update for a while now. Oh well.
Closes #118
closes #115
closes #114
cc FFMS/ffms2#190 cc #107
Closes #113
Closes #102 Again.
