dash-mpd-cli defaults to using mp4decrypt from Bento4 for decrypting
streams, though it can also use Shaka Packager. Nixpkgs currently
patches dash-mpd-cli to default to using Shaka Packager and does not
include mp4decrypt in the binary wrapper's $PATH. Unfortunately some
streams may fail to decrypt with Shaka Packager. To better support the
--decryption-application option in dash-mpd-cli, add bento4 and gpac to
the binary wrapper's $PATH. Also drop the Shaka Packager patch to better
match the upstream behavior. MP4Box from GPAC is used for binary WebVTT
and MPEG-4 timed text (TX3G) subtitle conversion.
Alex James
a64297234a