[x264-devel] Re: debug/error messages

[Måns Rullgård]

snacky at ikaruga.co.uk writes:

> On Tue, Aug 10, 2004 at 01:51:40AM +0200, Måns Rullgård wrote:
>> There are quite a few messages printed by x264.  These do not always
>> mix well with other output from programs using x264.  It is also
>> inconvenient to recompile x264 and relink programs just to change
>> which messages get printed.
>> 
>> To solve this problem, we could use a callback function for printing
>> messages, instead of plain fprintf.  See how libavcodec does it.  The
>> default could still be to print to the terminal, but applications
>> would have a chance to intercept messages and display them selectively
>> based on whatever rules it might have.
>> 
>> What are peoples' opinions on this matter?  If we could agree on an
>> interface to use for the callback I could do the implementation,
>> unless someone else has a great desire to do it.
>
> As an end user, I think this would be a benefit. I also wonder if
> there isn't some better way to control whether or not fdec.yuv is
> output. Currently, it too requires a recompile and relink to change.

None currently, but we could add something.

> I don't want to derail this topic, but are any of you familiar
> with the unofficial patch to mplayer which interfaces with
> x264? If you're interested, the patch can be downloaded here:
> http://article.gmane.org/gmane.comp.video.mplayer.devel/19396/
>
> There are some pretty major limitations, like muxing issues and the fact
> that mplayer won't even play any files generated by x264 where bframe!=0,

That's a libavcodec bug, I think.

> but it's been a reasonably handy way for me to test out x264 through
> mencoder as an interface.

I use TCVP instead.

> I should add that on certain kinds of source material, I've been
> absolutely blown away by the results.

Quite so.

> As long as I'm making impertinent end-user comments on a development list,
> may I also ask if anyone has archives of this list for me to read?

Most likely, but I don't think there's much there yet.

BTW, someone should update the web page a bit, now that we have rate
control.

-- 
Måns Rullgård
mru at mru.ath.cx

-- 
This is the x264-devel mailing-list
If you are in trouble, please contact <postmaster at videolan.org>