My biggest gripe though is that ffmpeg does seem to value these sorts of reports highly. If i'm reading the timestamps right, they fixed this report within 1 day: https://github.com/FFmpeg/FFmpeg/commit/c41a70b6bb79707e1e3a...
How often do you get your bug reports fixed that fast? When i file bugs in open source projects it usually takes at least weeks if im lucky to get a response. People almost never respond within 1 day. I think that demonstrates how valuable ffmpeg views these reports.
If the report was a garbage report (like e.g. the ones the curl maintainer complains about) i'd have more sympathy, but clearly ffmpeg views this issue submission as valuable. The whole thing makes me think of choosing-beggars. They want the google report but also are trying to use social pressure to make google contribute even more.
If they didn't want google's reports that's one thing - just reject them, but both wanting them while also demanding more is scummy in my opinion. Either accept or reject them.