Ask Justin Frankel

justin = { main feed , music , code , askjf , pubkey };

Ask Justin Frankel
No reasonable question unanswered since 2009!

Suggested topics: programming, music, sleep, coffee, etc.

Note: please do not ask questions about REAPER features, bugs or scheduling, use the forums instead.

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[older questions]

Question: Hi Justin! Asked earlier about how a small team like yours can write better code than a larger one and you answered you might have different goals. I think this is very interesting! What is your main goal and what do you think their’s is?
Asked by Hans Rohdin (94.234.94.x) on January 17 2026, 12:25am

Question: Will this JSFX @gfx line format work in older REAPER versions like version 4: gfx_clear = 0xFF101010;
Asked by gfx_clear (102.176.65.x) on January 14 2026, 4:13pm
Reply on January 14 2026, 7:36pm (edited at January 14 2026, 7:37pm):

yeah @gfx and gfx_clear go back to like REAPER 2.x or earlier, but 0xFF101010 might be problematic, could be a negative value. no need to specify an alpha channel value anyway. 11 Comments...

Question: Me again. Do you know this one? My favorite video on the internet probablay: youtube.com/watch?v=U4FNBMZsqrY&pp...
Asked by Seven (141.91.18.x) on January 13 2026, 10:22am
Reply on January 14 2026, 7:34pm:

haven't gotten around to watching that yet Comment...

Question: Why haven't you switched to nginx?
Asked by Will (99.100.219.x) on January 12 2026, 12:43am
Reply on January 12 2026, 2:33pm:

if it ain't broke... Comment...

Question: Is H.264 actually supported in reaper or is it MJPEG in disguise? Are there plans to support ffmpeg higher than 4.4.1?
Asked by Rachel Yearst (159.118.61.x) on January 10 2026, 10:30pm
Reply on January 11 2026, 5:18pm:

If you install a version of ffmpeg that supports h264 then REAPER will render to it. as far as more recent ffmpeg versions, it's on our list but it's a huge pain in the ass to figure out. For macOS/Windows users, you can use the avfoundation/wmf encoders instead. For linux, deal with the old ffmpeg versions for now. 2 Comments...

Question: Hello, hope you are doing fine! I just read the blog post you wrote yesterday (about the death by a million papercuts). Then I got Anubis (anubis.techaro.lol/ in my head (which is basically a FOSS "AI Firewall"). Just wanted to point you to it in case you didn't know it.
Asked by anonymous (62.227.184.x) on January 8 2026, 7:37pm
Reply on January 8 2026, 7:47pm (edited at January 8 2026, 7:53pm):

yeah, that's too much for me though (dependencies, supply chain, integration requirements, etc). prefer to keep it simple. Comment...

Question: How is it that a small team like yours can make much better software, with more efficient code, than a large company, like AVID for example?
Asked by Hans Rohdin (81.226.28.x) on January 8 2026, 7:32pm
Reply on January 8 2026, 7:47pm:

different goals, I imagine. Comment...

Question: How did you learned/learn the math that you use for DSP / REAPER development
Asked by Yonk (76.191.24.x) on January 8 2026, 7:00am
Reply on January 8 2026, 7:48pm:

a day at a time I guess ;)

The Scientist and Engineer's Guide to Digital Signal Processing

Comment...

Question: Spot on Justin. Jesus, assuming he existed, is likely to have been short and swarthy.
Asked by Tony (125.237.76.x) on January 5 2026, 6:21am
Reply on January 6 2026, 9:18pm:

who knows! Comment...

Question: Pls don't ask me if I've ever seen Jesus. But did you know that you looked like Jesus here? 1014.org/?article=6 Not surprised you are Jewish.
Asked by Question (154.161.45.x) on January 4 2026, 2:08pm
Reply on January 4 2026, 9:01pm:

hah or at least popular culture's interpretation of jesus Comment...

Question: What's your pc specs?
Asked by Long Name (2.147.103.x) on January 4 2026, 5:32am
Reply on January 4 2026, 9:01pm: