fixed the version in the download script.

Author: Raveler

ffmpeg/download.ps1

@@ -5,10 +5,10 @@ New-Item -ItemType Directory -Path $tempPath -Force | Out-Null
 $devZipPath = Join-Path -Path $tempPath -ChildPath "ffmpeg.dev.zip"
 $binZipPath = Join-Path -Path $tempPath -ChildPath "ffmpeg.bin.zip"
 
-(new-object System.Net.WebClient).DownloadFile('https://ffmpeg.zeranoe.com/builds/win64/dev/ffmpeg-20190320-0739d5c-win64-dev.zip', $devZipPath);
+(new-object System.Net.WebClient).DownloadFile('https://ffmpeg.zeranoe.com/builds/win64/dev/ffmpeg-20190716-806ac7d-win64-dev.zip', $devZipPath);
 Expand-Archive $devZipPath -DestinationPath $tempPath -Force
 
-(new-object System.Net.WebClient).DownloadFile('https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-20190320-0739d5c-win64-shared.zip', $binZipPath);
+(new-object System.Net.WebClient).DownloadFile('https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-20190716-806ac7d-win64-shared.zip', $binZipPath);
 Expand-Archive $binZipPath -DestinationPath $tempPath -Force
 
 Remove-Item -Path include -Force -Recurse -ErrorAction Ignore

ffmpeg/readme.txt

@@ -8,6 +8,8 @@ The structure should be as follows:
 For Windows, you can get the necessary files from:
 https://www.ffmpeg.org/download.html
 
+The library has last been tested with ffmpeg 4.1.4.
+
 Download the dev version and extract it into this folder for the lib and include dirs.
 Download the shared version for the dlls and extract that one as well.
 Make sure that bin, lib and include are present.