[FFmpeg-devel] AC-3 error concealment

Michael Niedermayer michaelni
Sun Nov 9 13:46:19 CET 2008

On Sat, Nov 08, 2008 at 11:30:41AM -0800, Anduin Withers wrote:
> Changeset 13397 adopted the last know-good block duplication method for 
> error concealment.
> Below is a link to one actual result of this method, it is extremely 
> short but shows the original block and then it being duplicated over the 
> next two corrupt frames followed by a few good frames.
> http://www.anduin.com/ac3_last_good_dup_concealment.wav
> Would a change adding a new flag to error_concealment be acceptable 
> (either adding muting, whole frame duplication, or skipping)? Or some 
> other way to detect the use of block duplication for the returned samples?

once you explain what problem you have and once the problem is understood,
solutions can be considered.
If the error concealment used works poorly, it has to be fixed, a patch
and the results of listening tests are welcome.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Breaking DRM is a little like attempting to break through a door even
though the window is wide open and the only thing in the house is a bunch
of things you dont want and which you would get tomorrow for free anyway
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