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szatmary
Print debug output to stderr in vtt.c
Polluting to stderr from a library isn't much better than polluting stdout.
A real solution would be to have an API to provide a logging callback and opaque user pointer to pass to that callback.
If a program outputs actual data to stdout, then "polluting" stderr is the only option. This fix was made because the example program flv+srt can output the processed media stream to stdout. If stdout also contains debug messages, the resulting stream will be invalid.
This is untrue. stderr is not the only option - did you read what I wrote? I provided exactly what the correct option is.
Yes, you are right. I should have rewritten the library that I used today for the first time, that I needed for a small thing, by implementing an API with callbacks and user pointers. Thank you for pointing out what is exactly the correct option.
I merely contested that it was the "only" option, which is what you said. Please settle down.
I think if you have no interest in correcting the behavior, it is preferable to comment out or remove them instead - @szatmary's approval pending, of course.