I just released version 1.5.0 of Nageru, my live video mixer. The biggest feature is obviously the HDMI/SDI live output, but there are lots of small nuggets everywhere; it's been four months in the making. I'll simply paste the NEWS entry here:
Nageru 1.5.0, April 5th, 2017 - Support for low-latency HDMI/SDI output in addition to (or instead of) the stream. This currently only works with DeckLink cards, not bmusb. See the manual for more information. - Support changing the resolution from the command line, instead of locking everything to 1280x720. - The A/V sync code has been rewritten to be more in line with Fons Adriaensen's original paper. It handles several cases much better, in particular when trying to match 59.94 and 60 Hz sources to each other. However, it might occasionally need a few extra seconds on startup to lock properly if startup is slow. - Add support for using x264 for the disk recording. This makes it possible, among other things, to run Nageru on a machine entirely without VA-API support. - Support for 10-bit Y'CbCr, both on input and output. (Output requires x264 disk recording, as Quick Sync Video does not support 10-bit H.264.) This requires compute shader support, and is in general a little bit slower on input and output, due to the extra amount of data being shuffled around. Intermediate precision is 16-bit floating-point or better, as before. - Enable input mode autodetection for DeckLink cards that support it. (bmusb mode has always been autodetected.) - Add functionality to add a time code to the stream; useful for debugging latency. - The live display is now both more performant and of higher image quality. - Fix a long-standing issue where the preview displays would be too bright when using an NVIDIA GPU. (This did not affect the finished stream.) - Many other bugfixes and small improvements.1.5.0 is on its way into Debian experimental (it's too late for the stretch release, especially as it also depends on Movit and bmusb from experimental), or you can get it from the home page as always.