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Re: MPEG encoder
On Tue, 13 Jan 2004, Gregor Mückl wrote:
> > Please consult http://mjpeg.sourceforge.net/ and clarify this - I will
> > greatly appreciate that.
> Yep, mjpeg is "Motion JPEG", a format where each frame is a compressed JPEG
> image. This differs a lot from MPEG.
Yes, but, I believe this is historically. Here is a snippet from the
mpeg2enc tool that is part of the mjpegtools package:
mpeg2enc is heavily enhanced derivative of the MPEG Software Simulation
Group's MPEG-2 reference encoder. It accepts streams in a simple pla-
nar YUV format "YUV4MPEG" produced by the lav2yuv and related filters
(e.g. yuvscaler(1)) from the mjpegtools(1) package. A output plug-in
to the mpeg2dec(1) MPEG decoder is available to permit its use in
transcoding applications. The encoder currently fully supports the gen-
eration of elementary MPEG-1, progressive and interlaced frame MPEG-2
streams. Field encoded MPEG-2 is also possible but is not currently
maintained or supported.
Reading the website and man pages for the different tools definitively
leaves me with the impression that mjpegtools produce both mjpeg and
I would like to know if I am wrong.
> And the mpegtools I mentioned *do* exist as an entirely different package. I
> just don't have an URL right now. It's a project of the Berkley University
I think part of this package has been integrated into mjpegtools.
I may very well be wrong though.
> However, a short glance at the mjpegtools homepage shows that they seem to be
> able to handle mpeg streams in some way or another. But I haven't understood
> in what way (it's 2 o'clock in the morning and I actually belong to bed now).
I know the feeling ;-)
Mads Bondo Dydensborg. email@example.com
Value your freedom, or you will lose it, teaches history. "Don't bother us
with politics," respond those who don't want to learn.
- Free software proponent, Richard M. Stallman