How do I find the bitrate and resolution?

I have numerous video files that I have successfully imported into iTunes for use on the Apple TV. But I can't figure out how to consistently find the birate and resolution. When I select "Get Info," files that I created with HandBrake (DVD rips) show the res but not the bitrate, and files I created with Quicktime (ie iMovie HD export) don't show either. There is probably an easy way but I can't find it. Thanks!

Mac Pro, Mac OS X (10.4.9)

Posted on Mar 24, 2007 1:15 PM

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5 replies

Mar 24, 2007 1:25 PM in response to OSU-Mac

When I select "Get Info," files that I created with HandBrake (DVD rips) show the res but not the bitrate, and files I created with Quicktime (ie iMovie HD export) don't show either. There is probably an easy way but I can't find it.
Since the files are, by definition, QT compatible, simply open them with the QT Player and check the "Show Movie Info" window. It will tell you the combined average "video + audio" data rate, as well as, the original encoded and current "scaled" display if modified. If you have QT Pro, you can also use the "Show Movie Properties" window to read individual video and audio data rates.


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Mar 24, 2007 1:58 PM in response to OSU-Mac

Surpisingly, I discovered that iMovies (created in 1080i with my Sony HD camcorder) exported using the Apple TV settings (Quicktime Pro) only exported to 960 X 540 resolution. Although they still look great on the Apple TV. Any idea why this resolution?
Sure. The "Movie to TV" export option employs a Context-Adaptive Variable Length Coding (CAVLC) approach which looks at both the current display dimensions and the frame rate. Since the max combination for TV is 720p24 (1280 x 720 @ 23.98/24 fps) and the frame rate from your Sony is 29.97 fps, QT Pro/iMovie reduces the display dimensions to 540p30 (960 x 540 @ 29.97/30 fps) which is the largest dimensions a 29.97/30 fps file can have under the current CAVLC algorithm. If you want to output your files at the full 1280 x 720 display resolution, then either reduce the frame rate before sending the files to QT Pro/iMovie or use an alternative compression application like MPEG Streamclip which can perform both operations in a single workflow.


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How do I find the bitrate and resolution?

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