[mythtv-users] transcoded nuv/mpeg4: really mpeg4?

[Brian J. Murrell]

On Thu, 2005-08-18 at 13:43 -0400, Isaac Richards wrote:
> 
> AVI assumes that audio + video data is at a constant framerate.

Ahhh.  OK.

> It doesn't 
> have any concept of timestamps.  For regular TV, that's just not true.  For 
> stuff recorded by a soundcard, that's even less true - the soundcard's clock 
> varies over time.

Indeed.

> You ask for 48000 samples per second, and what you get 
> won't be that exactly, and will change over time as well.

Right.

> In a nuv file, each frame of video, and each packet of audio has a timestamp 
> associated with it.

I don't know much about OGG either, but would NUV re-contain into an OGG
container any better?

> There are also additional constructs for dealing with 
> skipping individual frames (for exact frame-level cuts during a transcode 
> without reencoding), and other various things that make it rather ideal for 
> dealing with stuff recorded from a tuner card.

Are those in the MPEG4 stream or the NUV container?  They probably could
be dropped assuming OGG were better suited to re-containing (i.e. if it
has timestamps, etc.)

b.

-- 
My other computer is your Microsoft Windows server.

Brian J. Murrell
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : http://mythtv.org/pipermail/mythtv-users/attachments/20050818/52c2c9da/attachment.pgp