我尝试安装该motion应用程序，但服务器上缺少大量依赖项，如下所示。我应该在哪里以及如何报告？
发行版：Ubuntu-mate 15.04
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavutil-ffmpeg54_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libswresample-ffmpeg1_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavcodec-ffmpeg56_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavformat-ffmpeg56_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavresample-ffmpeg2_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libpostproc-ffmpeg53_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libswscale-ffmpeg3_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavfilter-ffmpeg5_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavdevice-ffmpeg56_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/ffmpeg_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/qt-faststart_2.5.6-0ubuntu0.15.04.1_amd64.deb
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W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavutil-ffmpeg54_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libswresample-ffmpeg1_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavcodec-ffmpeg56_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavformat-ffmpeg56_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavresample-ffmpeg2_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libpostproc-ffmpeg53_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libswscale-ffmpeg3_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavfilter-ffmpeg5_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavdevice-ffmpeg56_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/ffmpeg_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/qt-faststart_2.5.6-0ubuntu0.15.04.1_amd64.deb
404 Not Found