[Ffmpeg-devel] [PATCH] x264 avc encoding, movenc avcC, ctts

Colin Ward lists
Mon Feb 20 10:01:56 CET 2006

M?ns Rullg?rd wrote:


> Yes, AVC = MPEG4 part 10 = H.264.  It is occasionally also referred to
> as JVT, and in some older sources as H.26L.  There seems to be a
> fairly widespread misbelief that AVC is a special variant of H.264
> found in quicktime files.  This is incorrect.  There seems to be a lot
> of confusion surrounding this codec.  In the broadcast industry, MPEG4
> has become synonymous with H.264, the old MPEG4 (part 2) being rarely
> used.

   Marketing types don't help, and neither does having codecs (MPEG4) 
and containers (MPEG4) referred to by the same name.  Whether it is 
correct to refer to the MPEG4 video codec as MPEG4 I am not sure but it 
certainly causes some confusion.

   Just to clarify something I have always wanted to clarify but never 
found the answer to on the Internet: The MPEG4 video codec and H.263 
video codec are *different* codecs aren't they?

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