[vlc] Re: optimum bitrate for streaming Mpeg2-ts

[Måns Rullgård]

Jean-Paul Saman <jean-paul.saman at planet.nl> writes:

> Chhaya, Harshal wrote:
>
>>> A general bitrate of about 3.5MBps / 4MBps (like in DVB streams)
>>> can easily go upto 8 MBps temporarily when using VBR (Variable
>>> Bitrate encoding). Which is general more used then CBR (Constant
>>> Bitrate encoding).
>>
>> I have seen the same behaviour when streaming a DVD. Is it possible
>> to transcode a DVD into a CBR MPEG-2? I tried the
>>most simple way of writing the stream to file and it resulted
>>in an MPEG-2 file whose rate ranged from ~6 Mbps to ~12 Mbps.
>
> Forcefully making a CBR stream from the file, by inserting so called
> NULL TS-Packets. The file will have the bitrate as its largest peak:

To do this, the file would have to be scanned to determine the peak
bitrate.  This may or may not be a problem.

> - A DVD bitrate that goes upto 6 Mpbs will have a 6 Mbps CBR.
> - A DVD bitrate that goes upto 12 Mbps will have a 12 Mbps CBR.

The maximum allowed mux rate of a DVD is 10.08 Mbps.

-- 
Måns Rullgård
mru at inprovide.com

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