[Vorbis-dev] ogginfo writes errors to stdout

[Ray Kohler]

On Wed, Mar 17, 2010 at 8:22 PM, Conrad Parker <conrad at metadecks.org> wrote:
> On 18 March 2010 04:16, Ray Kohler <ataraxia937 at gmail.com> wrote:
>> The ogginfo tool writes its errors to stdout instead of stderr.
>> Shouldn't that change? (Warnings also go to stdout, but that's more of
>> a gray area.) The other vorbis-tools don't have this problem, with the
>> possible exception of vcut, which writes the usage message to stdout,
>> another edge case.
>
> I think it would make sense for operational errors (eg. file not
> found, unreadable etc.) to go to stderr, and surely that's what's
> happening with the other vorbis-tools. For conformance errors (ogg
> framing, comment format, vorbis headers etc.) it might make sense to
> write them to stdout so that they are part of the same output stream
> as warnings and general info, ie. so they form a coherent report, and
> aren't re-ordered.

ogginfo uses its error() function for three cases:
- can't open input file
- don't know how to handle stream
- not an Ogg file

so it's a bit of a mixed case.