Public bug reported: Seems like avconf and kdenlive disagree about the format of the command- line arguments. Deinterlacing is important for proxy-clips, anyway. The log tells:
avconv version 11-6:11-2, Copyright (c) 2000-2014 the Libav developers built on Oct 24 2014 21:37:42 with gcc 4.9.1 (Ubuntu 4.9.1-19ubuntu1) Unrecognized option 'deinterlace'. Error splitting the argument list: Option not found ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: kdenlive 0.9.8-1ubuntu2 Uname: Linux 3.18.0-031800rc3-lowlatency x86_64 ApportVersion: 2.14.7-0ubuntu9 Architecture: amd64 Date: Tue Nov 4 06:45:55 2014 EcryptfsInUse: Yes SourcePackage: kdenlive UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: kdenlive (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug vivid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1389093 Title: Failed to create Proxy Clip To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kdenlive/+bug/1389093/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs