[Ffmpeg-devel] [PATCH] configure.c: CONFIG_ENCODERS

Michael Niedermayer michaelni
Sun May 8 01:05:15 CEST 2005


On Sunday 08 May 2005 00:09, M?ns Rullg?rd wrote:

> I'd still also like to know how to -acodec copy an AC3 stream from one
> MPEG file to another, without --enable-a52.

mpeg needs a decoder or parser to split things into packets and find the 
timestamps for each, not to mention that stuff like the samplingrate is 
stored in the AC3 stream
there shouldnt be a problem with just extracting the raw AC3 stream without 
--enable-a52, but putting it back into any file wont work, even for 
mpeg-ps/ts you need to know the packet boundaries so the pts/dts values are 
correct unless of course you somehow ensure that the same set of bytes which 
was in a mpeg system packet ends up again in exactly one
thats not really a ffmpeg problem but a fundamental problem with mpeg-ps/ts, 
the easiest solution would be to make the existing ac3 AVParser independant 
from the ac3 decoder


"nothing is evil in the beginning. Even Sauron was not so." -- Elrond

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