Unify cli encoder info
Merge remote-tracking branch 'remotes/origin/plain' into tMod
version.sh
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.
Auto keyint

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