trying to run below command 
getting `ERROR: invalid argument syntax for --pssh` 
```
mp4encrypt \
--show-progress \
--method MPEG-CENC \
--key 1:ad4abff38eXXXXXXdb1dc4:35582dcfaca35XXXXXXfc876de \
--property 1:KID:2380edc042XXXXX3 \
--pssh-v1 edef8ba9-79d6-4ace-a3c8-27dcd51d21ed:./ttt.bin \
PRW-YYY-frag.mp4 PRW-YYY-cenc.mp4
```


please advice, also if you can give example how to pass base64 pssh for widevine and playready and how to use mp4encrypt for fairplay

mp4encrypt with pssh
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : mp4encrypt with pssh
Issue date:

--- start body ---
trying to run below command 
getting `ERROR: invalid argument syntax for --pssh` 
```
mp4encrypt \
--show-progress \
--method MPEG-CENC \
--key 1:ad4abff38eXXXXXXdb1dc4:35582dcfaca35XXXXXXfc876de \
--property 1:KID:2380edc042XXXXX3 \
--pssh-v1 edef8ba9-79d6-4ace-a3c8-27dcd51d21ed:./ttt.bin \
PRW-YYY-frag.mp4 PRW-YYY-cenc.mp4
```


please advice, also if you can give example how to pass base64 pssh for widevine and playready and how to use mp4encrypt for fairplay

--- end body ---
