[Ffmpeg-devel] Differences between mencoder and ffmpegwhenencoding using x264
Mon Feb 27 11:51:28 CET 2006
> I started looking at this. The libavcodec side of it is easy enough.
> The problem is making ffmpeg.c use it. More specifically, it sets all
> the parameters in AVCodecContext before deciding which codec to use.
I've looked at this yesterday and well -- ffmpeg.c shouldn't do this,
if only for preparation of the day when per-codec parameters arrive..
I would suggest for ffmpeg.c:
1. When parsing options and recognizing them as codec options, don't
do anything with them except storing them in opt_names,
opt_args arrays (this is already partially the case right
now, opt_names already exists).
2. For each input and output file, store an index into opt_names
which is one past the last option valid _for this file_
(important for per-file options)
3. avcodec_open() gets three new parameters, or at least a new
int avcodec_open(AVCodecContext *s, AVCodec *codec,
const char *opt_names, const char *opt_args, int opt_n)
In the future, this could also set options in contexts derived from
AVCodecContext, e.g. when a "parent" pointer is added to AVClass.
Unfortunately, I won't have time to actually implement this before
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