Am Thu, 25 Jun 2009 07:36:32 +0200
schrieb Richard <[email protected]>:
> Hi!
>
> Maybe I have asome bad comprehension so please excuse my lack of
> knowledge if it appears that the problem comes from it.
Nah, it's just not all that user friendly.
> I try to do a conversion of a movie in Quicktime PNG/alac codec using
> transcode 1.1.2 to a Quicktime h264/AAC one using the mov export
> module with the x264 and faac options. libx264 is a git version a
> less than a month old. The goal is to have near perfect quality,
> whatever the size of the output file.
> It works perfectly well but whatever the bitrate settings I provide
> ("-w 10000", "-w 25000 --video_max_bitrate 25000", etc.), it seems
> stuck to a 8000 output and yields a file with the exact same amount
> of octets, even using one path or two.
[..]
> The thing is : there are still some part of the film where I see some
> blockiness, some moving block where the image should be still.
> I would have expected, a bit like the JPEG image file, to see the
> blockiness disappear when you ask for max quality.
> I guess that if the quality (and even the number of bytes of the
> output) doesn't change after I increase the bitrate, it must be
> because it's not possible with my current settings to get any better.
> Has anyone a suggestion that could improve my output?
>
The mov exporter uses libquicktime. Each libquicktime codecs has its
own set of options, but not all of them are mapped to transcode options.
IIRC none of the x264 ones are.
You can either pass those options via -F (-F ,,list returns the
available options) or set them globally with the libquicktime_config
tool that comes with libquicktime.
stefan
