[FFmpeg-devel] [PATCH] Increase to 4K the initial size of the probe.

Giovanni Motta giovanni.motta at gmail.com
Wed May 7 02:07:04 CEST 2014


Hi Michael,
I've emailed you two short files privately, at the same time I've submitted
the patch.
Thanks
G.



On Tue, May 6, 2014 at 4:59 PM, Michael Niedermayer <michaelni at gmx.at>wrote:

> On Tue, May 06, 2014 at 03:48:01PM -0700, Giovanni Motta wrote:
> > In a 320Kbps MP3, a 2K buffer contains roughly 2 frames. If there is a
> > misidentification in the initial 2K bytes mp3_read_probe() doesn't have a
> > chance to decode the headers of the minimum 4 frames that are necessary
> to
> > return a meaningful score for a MP3.
>
> If you have a file that gets misdetected by ffmpeg, please provide
> a link.
>
> [...]
> --
> 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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