[FFmpeg-devel] [RFC] additinal desc_type for dtshd mpeg-ts demuxer

[madshi]

M?ns Rullg?rd schrieb:
> madshi wrote:
>   
>>> Whatever it is, it specifies a number of additions to
>>> standard MPEG-TS, indicated by the HDMV registration
>>> descriptor.
>>>       
>> Nope, only some of the additions are marked by "HDMV".
>> E.g. TrueHD tracks have an "AC-3" registration descriptor
>> and no "HDMV". So when using your logic ffmpeg would
>> not be able to handle Blu-Ray TrueHD tracks properly.
>>     
>
> Stop nit-picking, please.  Had you bothered to read any
> of my previous mails, you'd have realised that I *any*
> registration descriptor sufficient to identify a stream
> should be used, not only HDMV.  This is not the problem
>
> The problem is with when a stream has a stream type
> in the private range, and there is *no* applicable
> registration descriptor present.  When this is the
> case, we *cannot* know what it is, and we should not
> be trying to guess it.
>   

If there's an "AC-3" registration descriptor how would you
come to the conclusion that this would be a TrueHD stream
and not a simple AC3 stream?

The only way to handle a Blu-Ray TrueHD stream correctly
is to make use of the new hard coded Blu-Ray stream type
IDs. That was the point I was trying to make. Looking at
the registration descriptor alone to identify a stream is
simply not good enough.


> I'm not talking about politics.  I'm talking about giving
> people at least some incentive to create valid streams.
> If invalid streams don't play, they'll have no choice but
> to create valid ones.  In the long run, this makes life
> much easier for everybody involved.
>   

If ffmpeg had some kind of monopol then that might
work. But the tools commonly used for Blu-Ray and HD DVD
demuxing, remuxing, reencoding and playing today are mostly
not based on ffmpeg, as far as I can say. So you guys deciding
that you don't want to support some specific "invalid" streams
won't have much effect. If at all, people might just say:
"Oh, ffmpeg doesn't work well for these new HD formats,
let's use something else".

Anyway, I know your opinion now and you know mine.
So maybe we should leave it as that. I'm not using ffmpeg's
splitters, anyway.

> The difference is that you try to please all the whining
> users, while I send them to the firing squad.
>   

My main interest is not in pleasing whining users. I'm interested
in making my software work as good as possible even if the
source may be "strange". I prefer software that just works
and doesn't try to lecture the user of what he should do.

Regards, madshi.