[XviD-devel] Project Idea

[Zepher]

On Fri, 28 Jan 2005 09:56:12 +0100 (CET), Christoph Lampert
<chl at math.uni-bonn.de> wrote:
> On Fri, 28 Jan 2005, JP wrote:
> > hi every1 thanks for your help.. :) that brings me to one conclusion..
> > it's hard to choose a project title for a BSc...  regards
> 
> 
> Hi,
> 
> how about a tool that parses the MPEG-4 stream (based on the XviD
> decoder) and outputs all relevant fields in ASCII or XML?
> If done right, it could be used as an intermediate format to "edit"
> MPEG-4 on the binary level without having to recompile the stream.
> It would also be great for research, e.g. to analyze motion fields.
> 
This is a great and useful idea. I believe that will be a great tool
for other projects development related to XviD. So if possible, I
would like to join it. :-)

Thanks and Regards,

Min


> Or, since the first is quite a task, how about a binary level editor for
> internal MPEG-4 header parts, like aspect-ratio?
> I _hate_ it when encoding a stream, and then after 5 hours notice that the
> aspect-ratio was set wrong. This is essentially just 1 bit thats wrong,
> but I have to encode the whole stream again, because there's no too to
> locate and change this bit. :-(
> 
> Next idea, which I don't know if it has been tried: An MPEG-4 to MPEG-4
> reencoder unit, just like there are available for MPEG-2 (DVD9->DVD5).
> It would come handy in 2 cases: First, when encoding on the fly in high
> quality (like fixed quant 2), to reencode to smaller bitrate later.
> Second, if e.g. a DVD rip turned out a few MB to be too large, one could
> use this to reencode certain parts at slightly lower bitrate without
> having to reencode everything else.
> 
> gruel
> 
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