I've run avprobe on the videos that are not displaying and notice the following warnings:
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x1315320] multiple edit list entries, a/v desync might occur, patch welcome If I use a later version of HandBrake (0.10.3) to convert the videos, I don't get the warnings with avprobe and the videos display ok on my BQ 4.5 (the originals were created using HandBrake 0.10.0 according to avprobe). The output from avprobe for the non-displaying and the displaying videos are shown below. Video no longer displaying: avprobe version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2007-2014 the Libav developers built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1315320] multiple edit list entries, a/v desync might occur, patch welcome [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1315320] multiple edit list entries, a/v desync might occur, patch welcome Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'not_displaying.mp4': Metadata: major_brand : mp42 minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : HandBrake 0.10.0 2014112200 Duration: 00:02:44.87, start: 0.125011, bitrate: 649 kb/s Stream #0.0(und): Video: h264 (Main), yuv420p, 854x480 [PAR 1280:1281 DAR 16:9], 561 kb/s, 23.96 fps, 23.98 tbr, 90k tbn, 180k tbc Stream #0.1(eng): Audio: aac, 44100 Hz, mono, fltp, 81 kb/s # avprobe output Video converted using HandBrake 0.10.3, which displays ok: avprobe version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2007-2014 the Libav developers built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'displaying.mp4': Metadata: major_brand : mp42 minor_version : 512 compatible_brands: isomiso2avc1mp41 creation_time : 2016-02-08 19:09:56 encoder : HandBrake 0.10.3 2016012200 Duration: 00:02:44.99, start: 0.000000, bitrate: 682 kb/s Stream #0.0(und): Video: h264 (Main), yuv420p, 854x480 [PAR 1280:1281 DAR 16:9], 511 kb/s, 23.93 fps, 23.98 tbr, 90k tbn, 180k tbc Metadata: creation_time : 2016-02-08 19:09:56 Stream #0.1(eng): Audio: aac, 44100 Hz, mono, fltp, 164 kb/s Metadata: creation_time : 2016-02-08 19:09:56 # avprobe output -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1541079 Title: mp4 video not displaying after ota-9 update To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1541079/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs