Comment 3 for bug 1323822

Mkvinfo for the WebM file generated on Precise :
$ mkvinfo P5270914-precise.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 222861
|+ Seek head (subentries will be skipped)
|+ EbmlVoid (size: 163)
|+ Segment information
| + Timecode scale: 1000000
| + Muxing application: Lavf53.21.1
| + Writing application: Lavf53.21.1
| + Segment UID:0xc5 0xb6 0x30 0xdf 0xf7 0x71 0xf0 0xbd 0x47 0xf5 0x85 0x4b 0x4f 0x26 0x45 0xdc
| + Duration: 4.772s (00:00:04.772)
|+ Segment tracks
| + A track
| + Track number: 1
| + Track UID: 1
| + Lacing flag: 0
| + Language: eng
| + Codec ID: V_VP8
| + Track type: video
| + Default duration: 33.367ms (29.970 fps for a video track)
| + Video track
| + Pixel width: 1920
| + Pixel height: 1080
| + Display width: 1920
| + Display height: 1080
| + Display unit: 3
| + A track
| + Track number: 2
| + Track UID: 2
| + Lacing flag: 0
| + Language: eng
| + Codec ID: A_VORBIS
| + Track type: audio
| + Audio track
| + Channels: 2
| + Sampling frequency: 48000
| + Bit depth: 16
| + CodecPrivate, length 3949
|+ Cluster