[vlc] Re: VLC TS ratio ?

[James Yates]

You are right, many applications do require constant bitrate TS. VBR TS 
makes perfect sense when streaming over RTP/UDP but in a broadcast 
quality environment, you need to know how big the stream is. I currently 
use the pixeltools muxer as it is the only one I have found that creates 
very good results.
Take a look at tcmplex which is part of the transcode utils. I however 
use transmux from pixeltools and I am obtaining source material via a 
DVB-T receiver and using dvbstream to output the multiplex to a file. 
This works very well.

Måns Rullgård wrote:

>James Yates <james.yates at packetvision.com> writes:
>
>  
>
>> From what I have seen of VLC after looking through the code, VLC no
>> longer supports constant Bitrate TS. So no NULL packet padding of the
>> stream is done, thus the bitrate of the stream changes
>> constantly. Look at the shaping_delay parameter within the
>> code. Sometime ago, VLC appeared to output constant bitrate TS but a
>> major re-write of the muxer was made and it now only supports
>> variable bitrate. Unless anyone disagrees.
>>    
>>
>
>This is very unfortunate.  Many applications require a constant
>bitrate TS.
>
>  
>
>>   I was trying to do exactly the same as this. My solution, take VLC,
>>   rip the part of the DVD either on the fly or to a VOB file. Get VLC
>>   to generate an MPEG2 ps. You can then use another programme to
>>   generate a constant bitrate TS. VLC is great but MPEG2 TS support
>>   isn't so you will have to find another solution. I use a windows
>>   programme called Transmux from pixeltools.com which is a really
>>   good muxer. There are lots of open source equivalents though.
>>    
>>
>
>There are not that many open source TS muxers that actually get it
>right.  Would you name a couple?
>
>  
>

-- 
James Yates
Software Systems Engineer
Packet Vision Ltd
Tel: +44 (0)118 935 7070
Fax: +44 (0)118 935 7330

www.packetvision.com

-- 
This is the vlc mailing-list, see http://www.videolan.org/vlc/
To unsubscribe, please read http://www.videolan.org/support/lists.html