[FFmpeg-devel] Massive memory leak in 6.1.1 (fixed on master)

[James Almer]

On 5/1/2024 1:52 PM, Ville Syrjälä wrote:
> Hi,
> 
> I ran into a massive memory leak while transcoding some audio
> books after upgrading to ffmpeg 6.1.1 from 6.0.1.
> 
> Instead of the normal ~100 MiB rss it now exceeds 10 GiB in about
> ten seconds and keeps on going up.
> 
> Command line used was approximately this:
> ffmpeg -activation_bytes XXX -i book.aax -map 0:a -map 0:v -c:a mp3 -c:v copy \
> -ss 0.000000 -to 909.038005 -metadata track="1/69" -metadata title="Chapter 1" book_01.mp3
> 
> Bisect points to:
> commit 90fba2774304 ("avfilter/trim: switch to activate")
> 
> I then tried master and discovered that the leak is has been
> fixed by these two commits:
> commit 84e400ae37b1 ("avfilter/buffersrc: switch to activate")
> commit d9e41ead8226 ("avfilter/avfilter: fix OOM case for default activate")
> 
> So those should be cherry-picked to the next 6.1 release (assuming
> there will be one). Both cherry-pick cleanly, and afterwards the
> leak is gone from the 6.1 branch as well.

Just backported both commits. Thanks.