Changes

• Fix mkvmerge concatenation when resuming, and mkvmerge on Windows
• Display possible vspipe errors when ffmpeg pipe is present
• Add warning if rate control mode was not specified (for aomenc)

Full Changelog: 0.3.0...0.3.1

Windows binary

The provided binary in this release is dynamically linked to both the vapoursynth and ffmpeg libraries. Make sure the latest version of vapoursynth is installed, and that the ffmpeg DLLs are available. The ffmpeg DLLs can be downloaded from here: https://www.gyan.dev/ffmpeg/builds/packages/ffmpeg-4.4.1-full_build-shared.7z. Extract the files, and place the DLLs (which are in the bin directory once extracted) in the same directory as the downloaded av1an.exe