-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Jordan,
ok, there's two questions here: 1. Can I run arbitrary python code as block? 2. How do I use external programs in a block? (ffmpeg and the transcode tools are not python modules but executables on their own) So there's two answers here: 1. That's exactly what a python block is. Follow the "how to write an out-of-tree module" guide in the GNU Radio wiki. Just fill in your functionality in the work method. 2. This gets a little trickier. Since these programs are external, you can't rely on them giving you a fixed amount of output per input. Usually, they work on complete files -- which is quite the opposite of what's the idea behind GNU Radio. Two ideas: a.) (if the used program allows you to stream data into it using stdin) use the python subprocess module to start the program and pipe samples into it. Block the work() until you get sufficient output from the process. This is a hack and has lots of downsides. b.) see if you can find the functionality wrapped for python (I don't think there is a working python binding for ffmpeg right now,maybe there are bindings for libav, maybe use gstreamer or so). Use that. If python bindings don't exist, instead of writing a python block, write a C++ block. Greetings, Marcus On 14.04.2014 04:58, Jordan Johnson wrote: > I have a flow graph where I'd like to run ffmpeg/avconv, and > tscbrmux as blocks. Is there a way to use FFMPEG and other scripts > as GRC blocks? > > > > _______________________________________________ Discuss-gnuradio > mailing list [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTS4ddAAoJEBQ6EdjyzlHtzVIH/jp56DjBLyzjH46J2FExUYMG EkP8m3cQ16M4SxVCVr3agwasqgnROSTylKZbsUAUoigsJo6eJ4Vqvqp/0EfRoL0M yNA1H12L+9TFRZ1F1J/85XxnDT9kgYc7MsJlINySiy3ilag0dzP59GbAdh23X5N/ KjPSDneYZhlmACOaR58JvoN1czNLOlDQYOQyVA8O8riZZnwzibmhUCS/dlhz1yST YJ04Yp8OgtREENYzIwbH2rclxo3dRpdSSA2x81MT2C+icH3tFkRbkfXdrOW7d0lC 9E/qVeho98VGLWjGwASXwxpumwfmS/qeG+Iz/ijB9PPNHrLqzPg6ZwgRI0nfgXs= =Y00L -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
