That red wiggly line should never exceed 80Mbps. The XT3, XD3 and 4K players since FW 6.2+ have a media analysis tool built-in that calculates an ABR over 1 second time period (green wiggly line) and over 12 frames (red wiggly line) which is more meaningful for assessing whether or not a file bitrate is within spec for the player.Īs far as the bitrate is concerned, the important data here is the red wiggly line under the "Graph of average bitrates" ( See below diagram) which is as previously mentioned a calculation of the average bit rate over 12 frames. It is important to understand that the Media info ABR is calculated over the entire duration of the file which does not help much in assessing whether or not a file reported by Media info with a bitrate of 30Mbps will playback as smoothly as expected on a BrightSign player. To illustrate this, see below for the Media Info specs of a file encoded at 30Mbps CBR with Adobe Encoder:Ĭomplete name : \\Mac\Home\Downloads\video_Analysis\Brightsign-CBR 30 MAIN 10 LEVEL 5.1-April 18-2017.mp4įormat/Info : High Efficiency Video CodingĬodec ID/Info : High Efficiency Video CodingĪccording to Media info, this 30Mbps (ABR) file is within spec and should play fine without any stuttering (at least this is what the user in question thought). Typically after encoding a video file the most basic check would be to use a tool like Media info to check the file specs: So, I'm going to try to illustrate why a file that seems "good" isn't really. We often get users complaining about their video file, which is apparently within specs but failing to playback as flawlessly as expected. BrightSign players can support higher bitrates than this, but the bitrate can be lower in some situations (see OptimizingVideoQuality). Update: This article was written assuming a target maximum bitrate of 80Mbps.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |