[Ffmpeg-devel] Question about parameters

[Michael Niedermayer]

Hi

On Sat, Dec 23, 2006 at 07:06:39PM -0800, Aaron Williams wrote:
> 
> 
> Robert Swain wrote:
> > Hello,
> >
> > On 24 Dec 2006, at 01:57, Aaron Williams wrote:
> >> Hi,
> >>
> >> I am writing a new audio "codec" which basically computes the peak RMS
> >> volume for normalizing audio in another pass and am wondering if there's
> >> a standard way for my codec to introduce a new parameter so I can
> >> specify the RMS window size?  What is the best way for me to add this
> >> parameter to pass to my module?  My goal is to use the output from this
> >> to adjust the -vol parameter in the transcoding pass.
> >>
> >> Sorry about my previous posting.
> >
> > Did you intend to quote yourself and reply to the old thread again to
> > make this apology or do you still think you're not hijacking the
> > thread with this second posting? Don't reply to a thread and change
> > the subject to start a new thread. Compose a completely new mail and
> > send it to the appropriate address.
> >
> > Thanks,
> > Rob
> >
> 
> I created a new thread and did not post to the old thread again. It is
> in no way an attempt to hijack the old thread.  My previous posting
> within the other thread was a mistake.  My new posting has no reference
> to my previous posting, hence trying to clean it up and keep it out of
> the other thread.
> 
> I consider the previous posting dead and will no longer respond to any
> more messages regarding my mistake in posting a new thread since I would
> rather see the discussion continue in a civilized and professional
> manner and try and keep on the topic of ffmpeg development. 
> 
> I will repeat my question:  How does one add codec specific parameters
> to the command line of ffmpeg without adding a general purpose option
> and without bloating AVCodecContext with new fields not needed for other
> codecs?  There are a number of parameters I wish to add for
> normalization such as RMS window size, target volume, thresholds and an
> output log filename.
> 
> Another audio feature I would like to add is the ability to adjust the
> level of individual channels.

what you describe are audio filters not audio codecs and while it should
be possible to implement filters as raw-pcm codecs that would cause
alot of problems (think of chains or networks of codecs) -> its not 
acceptable for ffmpeg svn and as its not acceptable for svn theres
no point in asking here how to solve the various problems ensuing
due to this missdesign

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The educated differ from the uneducated as much as the living from the
dead. -- Aristotle 
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