Hi Sebastian, On Thu, Oct 08, 2026 at 09:55:53AM +0200, Sebastian Ramacher wrote: > Control: reassign -1 libmedia-convert-perl 1.5.2-1 > > Hi Wouter > > On 2026-10-04 17:39:28 +0200, Wouter Verhelst wrote: > > reassign -1 ffmpeg > > thanks > > > > On Sun, Sep 20, 2026 at 07:56:10AM +0200, Sebastian Ramacher wrote: > > > Source: libmedia-convert-perl > > > Version: 1.5.2-1 > > > Severity: serious > > > X-Debbugs-Cc: [email protected] > > > > > > Dear maintainer, > > > > > > libmedia-convert-perl fails its autopkgtests with ffmpeg 9.0: > > > > So, this happens only on armhf. > > No, it doesn't. See for example here > https://ci.debian.net/packages/libm/libmedia-convert-perl/testing/ppc64el/76474853/
I missed that, sorry. [...] > > As I don't expect an encoder to jump backwards in time, and as I don't > > see the problem occurring anywhere except on armhf, I believe this to be > > a bug in ffmpeg. As such, I'm reassigning this to ffmpeg, with the > > understanding that I might be wrong :) > > ffmpeg calculates the progress timestamp as the maximum DTS among > unfinished output streams. When the stream providing that maximum > finishes, it is excluded from the calculation, so the next reported > timestamp can be lower. In the case of this test, there are two streams: > the audio and the video stream. So one stream finishes early and then > out_time goes backwards. OK, that's a good explanation. It goes against what I intuited but that intuition obviously was wrong then. > I couldn't find any FFmpeg documentation. Therefore I don't think the > test should require it to increase monotonically. A consumer needing > monotonic progress will need to keep the maximum value seen so far. > > Reassining it back to libmedia-convert-perl. It is making assumptions on > out_time that are not documented and not guaranteed. Agreed. I disabled these tests and will upload a fixed package soon. Thanks for explaining. -- "I never had a C in history!" "Yeah, but there was so much less of it when you were my age!" -- Joe Brockmeier recounting a conversation with his father, cfgmgmtcamp 2026, Ghent
