Le quartidi 14 thermidor, an CCXXIII, Michael Niedermayer a écrit : > > ffmpeg -lavfi testsrc -f framecrc | head > Thats interresting, i tried this and it did not trash my terminal > also ive almost never seen ffmpeg trash my terminal with the current > code. No matter how i run it
As Ganesh noticed, I forgot the output "-" in my example, but you probably noticed that on your own, and that is not the issue. I just ran some tests and it appears that bash restores the tty state if the command was killed by a signal but not if it exited normally. Therefore, "ffmpeg ... - | head" will have the tty restored because ffmpeg dies by SIGPIPE, but "strace ffmpeg ... - | head" will trash the tty state because bash does not know of the SIGPIPE. The same goes for anything that runs ffmpeg as a sub-process, from "sh -c ..." to the FATE harness. Well, bash does part of its job, but I consider it should do more: leaving the tty trashed just because you inserted strace in front of the command is bad policy. Regards, -- Nicolas George
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