+ EBML head
|+ EBML version: 1
|+ EBML read version: 1
|+ Maximum EBML ID length: 4
|+ Maximum EBML size length: 8
|+ Document type: webm
|+ Document type version: 4
|+ Document type read version: 2
+ Segment: size 3089099
|+ Seek head (subentries will be skipped)
|+ Segment information
| + Timestamp scale: 1000000
| + Duration: 00:03:08.301000000
| + Multiplexing application: google/video-file
| + Writing application: google/video-file
|+ Tracks
| + Track
|  + Track number: 1 (track ID for mkvmerge & mkvextract: 0)
|  + Track UID: 38626794114143486
|  + Track type: audio
|  + Lacing flag: 0
|  + Codec ID: A_OPUS
|  + Codec's private data: size 19
|  + Codec-inherent delay: 00:00:00.006500000
|  + Seek pre-roll: 00:00:00.080000000
|  + Audio track
|   + Sampling frequency: 48000
|   + Channels: 2
|   + Bit depth: 16
|+ Cues (subentries will be skipped)
|+ Cluster
| + Cluster timestamp: 00:00:00.000000000
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.000000000
|  + Frame with size 516
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.021000000
|  + Frame with size 320
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.041000000
|  + Frame with size 544
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.061000000
|  + Frame with size 573
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.081000000
|  + Frame with size 262
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.101000000
|  + Frame with size 256
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.121000000
|  + Frame with size 423
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.141000000

*
* skipped ~18k lines for readability
*

|  + Frame with size 258
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:03:08.181000000
|  + Frame with size 248
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:03:08.201000000
|  + Frame with size 269
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:03:08.221000000
|  + Frame with size 261
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:03:08.241000000
|  + Frame with size 411
| + Simple block: key, track number 1, 1 frame(s), timestamp 00:03:08.261000000
|  + Frame with size 3
| + Block group
|  + Discard padding: 2875000
|  + Block: track number 1, 1 frame(s), timestamp 00:03:08.281000000
|   + Frame with size 3
Statistics for track number 1: number of blocks: 9415; size in bytes: 3022437; duration in seconds: 188.281; approximate bitrate in bits/second: 128422