Control: tags -1 moreinfo Hi,
On 20/07/18 23:14, Dirk Lehmann wrote: > Package: libavcodec-extra57 > Version: 7:3.4.3-1 > Severity: normal > Tags: d-i > > Dear Maintainer, > > I try to install a backport package which is depending on package > 'libavcodec57'. But I have installed the package libavcodec-extra57 > on my machine. If I try to install it, I get the following error: > > ---------------------------------------------------------------------- > root$> apt-get install jitsi > Reading package lists... Done > Building dependency tree > Reading state information... Done > Some packages could not be installed. This may mean that you have > requested an impossible situation or if you are using the unstable > distribution that some required packages have not yet been created > or been moved out of Incoming. > The following information may help to resolve the situation: > > The following packages have unmet dependencies: > jitsi : Depends: libavcodec57 but it is not going to be installed or > libavcodec-ffmpeg56 but it is not installable > E: Unable to correct problems, you have held broken packages. > ---------------------------------------------------------------------- Where is this package from? There is no "jitsi" in Debian (anymore) so it must be unofficial. When packages are built against ffmpeg they should get a dependency like this which should work with libavcodec-extra: libavcodec57 (>= 7:3.4.3) | libavcodec-extra57 (>= 7:3.4.3) Probably the jitsi packages itself is at fault, or something else is preventing the installation. > I'm not really familiar with DPKG, but I think it could be solved if > the manifest of dpkg-archive from 'libavcodec-extra57' includes a > > ---------------------------------------------------------------------- > [...] > Provides: libavcodec57 > [...] > ---------------------------------------------------------------------- Unfortunately this won't work because it won't satisfy versioned dependencies. If versioned provides was working properly everywhere then possibly it could be used, but I don't think it does yet (although I'm happy to be corrected!). James
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