[Ffmpeg-devel] Differences between mencoder and ffmpeg when encoding using x264

[Erik Slagter]

On Sun, 2006-02-19 at 16:50 +0100, Michael Niedermayer wrote:

> > I've got this weird problem, it's probably something I overlooked, so
> > I'd appreciate some help.
> > 
> > This command line:
> > 
> > ffmpeg -bf 16 -deinterlace -t 24 -nr 800 -y -coder 1 -threads 2 -i $1 -qmin 1 -qmax 51 -lmin 1 -lmax 51 -aspect 4:3 -minrate 0 -maxrate 9000 -b 3000 -bufsize 8000 -vcodec h264 -f h264 "$video" -acodec aac -ab 128 "$audio"
> > 
> > and this command line:
> > 
> > mencoder -frames 610 -nosound -ovc x264 -of rawvideo -vf "lavcdeint" -mc 0 -x264encopts "bitrate=3000:nr=800:bframes=16:cabac:vbv_maxrate=9000:vbv_bufsize=8000:threads=2" -o $video $vob
> > 
> > Give very different results, although as far as I can see the relevant
> > options are the same. The mencoder command line gives much better
> > quality (visually) using the same bit rate, almost no blockyness, while
> > the ffmpeg output is full of blocks.
> 
> well, remove one option at a time until no removial is possible anymore witout
> reducing the diffence in quality

That would be logical yeah. I figured it had to be something really
stupid, but apparently not that stupid ;-)
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