Mkvinfo for the WebM file generated on Trusty : $ mkvinfo P5270914-trusty.webm + EBML head |+ EBML version: 1 |+ EBML read version: 1 |+ EBML maximum ID length: 4 |+ EBML maximum size length: 8 |+ Doc type: webm |+ Doc type version: 2 |+ Doc type read version: 2 + Segment, size 217051 |+ Seek head (subentries will be skipped) |+ EbmlVoid (size: 163) |+ Segment information | + Timecode scale: 1000000 | + Muxing application: Lavf54.20.4 | + Writing application: Lavf54.20.4 | + Segment UID: 0x3e 0x93 0xba 0x8b 0xfd 0xdf 0xd6 0xff 0xd9 0x02 0xc0 0xaa 0xbd 0x1a 0x95 0xd2 | + Duration: 4.772s (00:00:04.772) |+ Segment tracks | + A track | + Track number: 1 (track ID for mkvmerge & mkvextract: 0) | + Track UID: 1 | + Lacing flag: 0 | + Language: eng | + Codec ID: V_VP8 | + Track type: video | + Default duration: 0.033ms (30000.300 frames/fields per second for a video track) | + Video track | + Pixel width: 1920 | + Pixel height: 1080 | + Display width: 1920 | + Display height: 1080 | + Display unit: 3 (aspect ratio) | + A track | + Track number: 2 (track ID for mkvmerge & mkvextract: 1) | + Track UID: 2 | + Lacing flag: 0 | + Language: eng | + Codec ID: A_VORBIS | + Track type: audio | + Audio track | + Channels: 2 | + Sampling frequency: 48000 | + Bit depth: 32 | + CodecPrivate, length 3949 |+ Cluster
** Attachment added: "WebM file generated on Trusty" https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1323822/+attachment/4120903/+files/P5270914-trusty.webm -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1323822 Title: Firefox can not play some WebM videos generated by avconv on Trusty Status in “firefox” package in Ubuntu: New Bug description: Steps to reproduce : - Download the source H.264 video attached to this bug - On a Trusty machine, convert this video to WebM with "avconv -i P5270914.MOV P5270914-trusty.webm". It should give the same result as attached - Open this webm file in Totem or in VLC : it plays correctly - Open this webm file in Firefox 29. When you click on play, it goes directly to the end and does not show anything - Open this same webm file in Chromium (tested with version 34) : it plays correctly If you generate the WebM file on Precise, with the same command-line, it plays correctly in Firefox (see attached P5270914-precise.webm). So I suppose it comes from a difference in the way avconv does the conversion, that is not correctly supported by Firefox All tests are made with Precise and Trusty amd64, with all current updates. Firefox version 29.0 on both avconv 9.13-0ubuntu0.14.04.1 on Trusty, and 0.8.10-0ubuntu0.12.04.1 on Precise To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1323822/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
