https://github.com/apriliars3/synocodectool-patch/blob/master/synocodectool/original/synocodectool.7.1-42661-0_7.1-42661-0.original
rename it to synocodectool
then replace it to 1-4
1) /usr/syno/bin/synocodectool
2) /volume1/@appstore/VideoStation/bin/synocodectool
3) /volume1/@appstore/MediaServer/bin/synocodectool
4) /volume1/@appstore/CodecPack/bin/synocodectool
it work with DSM 7.1.1-42962-1
https://github.com/apriliars3/synocodectool-patch