On 29/05/16 08:19, Ffanci Silvain wrote:
Yassin Philip, May 29 2016:
Hi list!
I'm recording screencasts with ffmpeg, and I'd like to add
compression and a bit of reverb to the voice track afterwards, is
there a cool, scriptable way to do that?
Hey hey Philip,
I don't know about cool, but there is applyplugin, which is part of
the basic ladspa installation. It can apply plugins on the
commandline. But I found it awkward, still, that's probably just me.
Ecasound can apply LADCSPA, some LV2 plugins and some internal
plugins. I like it's syntax much better and there are lots of helpful
examples on its website. With some clever code you can even add
convultion reverbs from jconvolver. The clever bit is having two
parallel tracks to get dry/wet levels. :)
For full on reverb jconvolver has fconvolver, which will render
directly to a file.
Nama can execute its own scripts. It is based on Ecasound, but has man
more high level controls. You can execute for-loops over all tracks or
subgroups of tracks in a project, including the application of
effects, sends, settings, rendering to disk with effect and more...
Though its high level operations might be helpful, you might find Nama
a bit too high level and interactive for your purposes.
There are more solutions, but even though they allow for more power,
their learning curve is steeper. :( If you'd still like to know about
them, just shout. :)
Wow, thanks very much for this thorough answer, I'm going to look into
Ecasoud, It's about time now.
About my screencast, I had a lapse of reason and ended up using "live"
LV2 effects in calf-jack (and also completely changed my logic as I'm
now using pulse jack sink to mix everything down to stereo) and doing so
I accidentally discovered the killer "Patchbay" feature of QJackctl that
literally *locks* the jack connections in a fixed state, before that I
was only seeing it at a redundancy on top of the actual connections. The
time I lost not investigating this before is punition enough ;(
yPhil
Good luck!
...
Ta-ta
----
Ffanci
* Homepage: https://freeshell.de/~silvain
* Twitter: http://twitter.com/ffanci_silvain
* GitHub: https://github.com/fsilvain
--
Yassin "xaccrocheur" Philip
http://manyrecords.com
http://bitbucket.org/xaccrocheur / https://github.com/xaccrocheur
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