fixing ffmpeg; didn't accept my custom ffmpeg when I was not on linux

ts-to-mkv.sh

@@ -47,12 +47,6 @@ FFMPEG="/data/sourcecode/ffmpeg/ffmpeg-4.1.3-amd64-static/ffmpeg"
 if [[ ! -f "$FFMPEG" ]]; then
     FFMPEG=$(/usr/bin/env which ffmpeg)
 fi
-
-ffmpegcheck
-if [[ "$?" == "2" ]]; then
-    echo "[error] ffmpeg version too low, need to use version 4.0.0 or newer."
-    exit 1
-fi
 WORKPATH="./"
 keepsource="0"
 version="2"
@@ -99,6 +93,12 @@ while getopts d:p:fnhkq OPT; do
     esac
 done
 
+ffmpegcheck
+if [[ "$?" == "2" ]]; then
+    echo "[error] ffmpeg version too low, need to use version 4.0.0 or newer."
+    exit 1
+fi
+
 shift $((OPTIND-1))
 echo "[info] finding files"
 filelist="$(find "$WORKPATH" -name "*.ts")"