Video filter: subtitles
Detect color matrix with lavf/ffms demuxer
Fix AviSynth color space converting matrix
Fix swscale color space converting matrix
Support "dgi" file extension
Support "vpy" file extension
Support invoking LSMASHSource in avs demuxer
Variable progress precision, print encoded file size & estimated total size

This patch may cause progress indicator to exceed console width limit.
Try to increase width of console window to avoid the problem.
More detailed "zones" help
Unofficial --device
Correct framerate to proper NTSC fraction if applicable
Add "libaacplus"
don't show opencl help in opencl disabled builds
version: print whether opencl is disabled or enabled
TriAQ
Separate I/P/B qpmin/qpmax parameters
Add an option to specify lavf decoder
Increase the temporal buffer size for Unicode support

Although the maximum size of one character in UTF-16 is 4bytes,
sizeof(wchar_t) is 2bytes on Windows.
Also, non-ASCII characters requires 2bytes in ANSI code page.
The existing buffer size is insufficient.
Cosmetics: cli log info
Auto keyint

When --keyint is negative value or "auto", keyint_max is set to fps * 10 automatically.