[FFmpeg-devel] [PATCH] avformat/mov: validate chunk_count vs stsc_data

Michael Niedermayer michael at niedermayer.cc
Wed Feb 6 17:57:34 EET 2019

On Mon, Feb 04, 2019 at 04:30:29PM -0800, chcunningham wrote:
> Bad content may contain stsc boxes with a first_chunk index that
> exceeds stco.entries (chunk_count). This ammends the existing check to
> include cases where chunk_count == 0.
> ---
>  libavformat/mov.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)

This seems to break GF9720Repeal20the20Eighth20with20Helen20Linehan.m4a
Thats a sample from chromium issue 822666


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Many things microsoft did are stupid, but not doing something just because
microsoft did it is even more stupid. If everything ms did were stupid they
would be bankrupt already.
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