On 8/17/2021 12:45 AM, Phil Rhodes via ffmpeg-user wrote:
I can't remember what the solution was, but I seem to recall that it was
something to do with the fact that ffmpeg writes most of its status
information not to standard output, but to standard error, presumably so
as to keep standard output free for the media data it's producing.
I should have thought about that myself- lots of subprocess implementations
assume that anything written to stderr is an actual error message and
terminates the subprocess, and that may appear as a 'hang'. At least in tcl,
you can use -ignorestderr to prevent this behavior or redirect stderr into
stdout by ending the exec command with '2>@1' (or both).
Later,
z!
_______________________________________________
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
