55 lines
2.6 KiB
Markdown
55 lines
2.6 KiB
Markdown
# libcast
|
|
|
|
libcast is an open source implementation of the Cast protocol supporting Cast
|
|
applications and streaming to Cast-compatible devices.
|
|
|
|
## Using the standalone implementations
|
|
|
|
To run the standalone sender and receivers together, first you need to install
|
|
the following dependencies: FFMPEG, LibVPX, LibOpus, LibSDL2, LibAOM as well as
|
|
their headers (frequently in a separate -dev package). Currently, it is advised
|
|
that most Linux users compile LibAOM from source, using the instructions at
|
|
https://aomedia.googlesource.com/aom/. Older versions found in many package
|
|
management systems have blocking performance issues, causing AV1 encoding to be
|
|
completely unusable. From here, you just need a video to use with the
|
|
cast_sender, as the cast_receiver can generate a self-signed certificate and
|
|
private key for each session. You can also generate your own RSA private key and
|
|
either create or have the receiver automatically create a self signed
|
|
certificate with that key. If the receiver generates a root certificate, it will
|
|
print out the location of that certificate to stdout.
|
|
|
|
Note that we assume that the private key is a PEM-encoded RSA private key,
|
|
and the certificate is X509 PEM-encoded. The certificate must also have
|
|
the CA bit set in the basic constraints. The easiest way to test with a key
|
|
and certificate is to use ones generated by the cast_receiver standalone
|
|
application.
|
|
|
|
## Developer certificate generation and use
|
|
|
|
The easiest way to generate a private key and certificate is to just run
|
|
the cast_receiver with `-g`, and both should be written out to files:
|
|
|
|
```
|
|
$ /path/to/out/Default/cast_receiver -g
|
|
[INFO:../../cast/receiver/channel/static_credentials.cc(161):T0] Generated new private key for session: ./generated_root_cast_receiver.key
|
|
[INFO:../../cast/receiver/channel/static_credentials.cc(169):T0] Generated new root certificate for session: ./generated_root_cast_receiver.crt
|
|
```
|
|
|
|
These generated credentials can be passed in to start a session, e.g.
|
|
```
|
|
./out/Default/cast_receiver -d generated_root_cast_receiver.crt -p generated_root_cast_receiver.key lo0
|
|
```
|
|
|
|
And then passed to the cast sender to connect and start a streaming session:
|
|
```
|
|
$ ./out/Default/cast_sender -d generated_root_cast_receiver.crt lo0 ~/video-1080-mp4.mp4
|
|
```
|
|
|
|
When running on Mac OS X, also pass the `-x` flag to the cast receiver to
|
|
disable DNS-SD/mDNS, since Open Screen does not currently integrate with
|
|
Bonjour.
|
|
|
|
When connecting to a receiver that's not running on the loopback interface
|
|
(typically `lo` or `lo0`), pass the `-r <receiver IP endpoint>` flag to the
|
|
`cast_sender` binary.
|