What is "Total bit rate"?

I have a reasonable idea of what bit rates are, measured in MB/sec or Kb/sec, but whenever I use "Get Info" on a video clip I get something like . . . . "Total bit rate: 26,571" . . . . just that - nothing else.
What exactly is it?
It's too low to be b/sec.
I am sure it is too high to be Kb/sec ?
What do they mean by "Total"?
I understand "Average" and "Maximum" but what is "Total"?

I can't tell you how many people use my studio and compress their video to fit exactly on a DVD-5, and then go over because they can't fit their audio or menu graphics, or subtitles, or anything else. They go over literally by about 1-2 MB, and don't understand that you can't just stuff it in there… One byte over is too big. That's a tough one for a lot of people to grasp, but always funny when they ask if there's anything they can do to make it fit without recompressing it. I just tell them to hit it with the hairdryer.

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What are the Bit Rates of the Music Store and Podcasts?

What is the bit rate quality and format of a song downloaded in the Music Store? And podcasts? Are they perfect, Apple Lossless quality or what...?

This might be true, but you won't experience any improvement in sound quality. Here's some info on bit rates:
This was originally posted by the incredible Sparky the wUnderdog
"As a general principle, you can fit more CDs on your iPod if you encode at lower bitrates (making smaller files), but at the cost of audio quality. Lossless promises to capture all the data on the original CD (thus preserving quality) but coded so the file takes half the space. MP3 and AAC (an implementation of variable bit rate MP4) both eliminate some of the information on the CD in order to compress the digital recording into ever smaller files--the lower the bitrate, the smaller the file, but smaller files mean more information lost and consequent poorer sound quality.
iTunes's MP3 encoder is so-so; the LAME encoder is better at preserving sound fidelity to the original. AAC files ripped in iTunes certainly sound better than its MP3s, with audio quality close to the best LAME MP3s at higher bitrates. With the type of music I listen to most often, sound quality declines substantially as bitrates fall below 256kbps, but LAME or AAC @ 256kbps sounds pretty darned good, and at 320kbps LAME alt-preset-insane is amazingly faithful to the original. However many users claim that with the music they listen to they can't hear the difference between 192 or even 128 kbps files and the original CD source, so they naturally choose higher compression rates to fit more "songs" on their iPods.
CDs take approximately 10MB per minute of music; Apple lossless takes 5MB/minute; LAME insane takes 2.5MB/min; AAC or MP3 at 256kbps take 2MB/min; and iTunes Store files (AAC@128kbps) take 1MB/min. At these rates, a 20GB iPod (really 18.6GB) can hold anywhere from 30 hours to over 300 hours of music. (iPod marketers express this potential playback capacity as "songs," figuring 4 minutes per song--thus 300 hours at 128kbps = 4500 "songs.") You will need to listen to samples ripped with different bitrates and codecs to determine the optimum tradeoff point for you between quality & quantity. It's worth taking some time to do this at the start as it sure beats reripping everything in your collection 2 or 3 times to get it right later.
So far as convenience goes, nothing beats iTunes's one-step process. To change bitrate as you import from CD, go to the iTunes menu > Edit > Preferences, select the Importing tab, choose AAC or MP3 encoder in the "import using" selection box, then choose "Custom" in the "setting" box, and the window permitting bitrate selection will pop up. If you choose iTunes MP3 encoder, at least use VBR (variable bit rate) to maximize the sound quality. (VBR increases sample size as data complexity increases.)
If you would prefer LAME MP3s, fear not, for the easy-to-use CDex ripping software is a free download and requires only one simple extra step to get the files into iTunes for transfer to your iPod. Now if AAC sound quality is comparable to LAME MP3, you might wonder why you should even consider LAME: Because of portability to other devices. At present, hardly anything but iPods can read AACs or Apple Lossless, but almost everything reads MP3s. So if you plan to burn CDs of your compressed files for playback on your home or car CD player (for instance), it would be wise to choose MP3.
One other consideration specific to the iPod: It has a 32MB cache. If you choose a compression rate that results in large files (i.e. lossless), then the cache won't hold very much 'music' and the hard drive will have to spin up frequently to fill it, and that will shorten your battery life somewhat."
JC

Blu-ray Error: "file already exists", Code: "6", "Audio buffer underflows. Total bit rate too high

Hopefully someon can help me out here - I'm stuck in my tracks. I'm reading through lots of threads on this topic, but don't understand what is going wrong here. CS6. Note: I have used Encore prior to put this material on a disc. I presently have a separate sequence paired down with only about 1/5 of the whole production. 1920x1080i, 29.97, H.264 Blu-ray, VBR 2-pass, PCM inside PP to produce .m4v/.wav. Here is what is confusing me - I tried a target of 10 and a max of 20 and I still get this error. I have tried different max bit rate "Default Transcode" settings in Encore as well. Note the time code listed "0.000000" - maybe that tells someone something. I don't really understand Encore yet, so maybe it is something I set wrong in Encore vs. my exports?

There are many similar, but not identical errors. And I assume you had already followed John's advice to review older threads. It is true they never quite pin a single set of issues down.
What specific version of Encore? Updated to 6.0.2.004? Encore staff once said updates solved some of these errors.
You say .wav for source files in Encore. But what format in the project? ac3?
Your versiono f the error is different from other one I see because it has a "audio buffer" rather than "video buffer" underflow.

What is the bit rate for the songs streaming on iTunes Radio?

Is it 256kbps AAC file?

I have to agree with you. There are several forum discussions on bit rate being as high as 256 kbps but I don't see how it could be more than 96 kbps based on the poor sound quality I'm hearing. I'm comparing it to an internet radio station that is 128 kbps and sounds much better.
Am I missing something?

Video Bit Rate Too High-how to reduce quality

I have a Creative Zen Vision M Version .40.02. The problem is a few of my videos have a high bit rate, which from what I have read is the problem. These videos are from the free digital copy that comes with the movie. I would like to know how I can either change this, if there is a firmware that would let a higher bit rate play(from what I have looked into it doesn't appear so), or if I can't play them on my player. Thanks for any help.

I don't know exactly what the total length of the video is in minutes, but I do know that it is 6.8GB for a dual layer. Probably at least 3 hours. I don't know what the target bit rate is? Is what you are referring is to what the compression I used in compressor?
I am using the setting DVD Best Quality 150 minutes 3.7mbps for video and the AC3 for the audio.
I am recompressing all the videos again just in case there was a problem with one of the compressions. I don't understand why it isn't working this time when none of the settings or compression had changed.
Thanks!!

Video bit rate too high when try to build and burn. Audio is AC3

I am trying to burn a dual layer DVD and when I go to build/format the DVD it says that the video bit rate is too high. I am confused by this because this DVD was burned previously without a problem. Changes had to be made to the project and the files were compressed in compressor with the same settings and now they do not work. The audio is AC3 dolby. Is there some setting that needs to be changed in DVDSP? What am I missing here...
I am using FC Studio 2.
Thanks!
Natalie

I don't know exactly what the total length of the video is in minutes, but I do know that it is 6.8GB for a dual layer. Probably at least 3 hours. I don't know what the target bit rate is? Is what you are referring is to what the compression I used in compressor?
I am using the setting DVD Best Quality 150 minutes 3.7mbps for video and the AC3 for the audio.
I am recompressing all the videos again just in case there was a problem with one of the compressions. I don't understand why it isn't working this time when none of the settings or compression had changed.
Thanks!!

Best Bit Rate for Better sound

I’m new to the iTunes/iPod thing. A friend told me that he re-sets the bit rate from the default of 128 kpbs to the top of 320 kbps for better quality. [He plays everything off of his computer which is wired to speakers throughout his house and does not travel or drive much so hardly uses his iPod.] I played around a tad with the various rates on the same album and found that a fairly short one used 34.9 MB at 128 kbps, 52.1 MB at 192 kbps, 60.8 MB at 224 kbps and 86.6 MB at 340 kbps. Another friend told me that he noticed a big difference when he played a song off his iPod through his several thousand dollar system if it was imported at 128 kbps. While hard disc space is cheap and I would simply opt for the higher quality setting, the iPods are not so big when one almost triples the file size.
I tried to figure out what the max bit rates in the CDs are so that could guide the max import rate, but I could not and that question may make no sense at all anyway.
What is the max that a human can notice the difference at and what have folks found to be the best balance between sound quality and storage space?
Thanks for your help.
PC Windows XP

Monty, this is really going to be up to your ears to decide. All I can tell you is my experience during the 2+ years of owning an iPod. I initially thought AAC @ 128 was satisfactory. I then started experimenting with various bitrates, but kept the AAC format. I decided that 192 was a discernible improvement over the 128. Not to go into a lot of detail, but I, quite by accident, had one album download at 256 & thought, "Wow, this is unbelievably better sound, even over inexpensive computer speakers." At that point, I started importing everything in AAC @ 256 VBR which I feel is pretty darn close to CD quality sound. I have a 60GB iPod that I'm willing to sacrifice some capacity in order to ensure the best audio quality I can. This is also why I do not buy frequently from the iTunes store as I do not feel the 128 downloads are the best quality. I buy & my own CD's, now, to insure good quality. I will by the occasional song from the store when I do not care to buy the whole CD. Hope this helps!

Bit Rate Issues

Ok here is the problem, in both H.264 and Mpeg-4 If I set the Bit rate to say 300kbps the end file has a bit rate of 512 kbps with a total bit rate of around 700kbps. Any suggestions or solutions. My audio is set at Liner PCI at 32.kHz 16bit
its like Quicktime is overriding my bit rate

Your wondering why you bit rate is 700kbs? Probably because you using PMC for your audio. Try AAC...your audio file will be smaller...Remember you bit rate is your video and audio added together.
Open you finished video in Quicktime--->Windows-->Show Movies Properties. This will show you the bit rate for the audio and video separately.

Compressor: setting max bit rate for VBR audio

Hi,
I am using Compressor 3 to transcode DV to H.264. I want to encode the audio to AAC VBR wtih a max bitrate of 256. Under the Settings tab, under audio, for VBR there is a slider from good to best. what does this mean in terms of max bit rates? How can you use this slider in a meaninful way?
There is a setting for Average Bit Rate, where you can select a value. do we konw what the max bit rate would be?
thanks
dan

Good question about the slider…and I really don't know the answer. Why don't you try a test: crank it to one extreme and then the other with a representative source file and see what impact it actually makes on the properties of the respective output files.
Good luck.
Russ

Export failed to meet required bit rate and color space specs - ProRes 422 to MPEG2

Using Premiere Pro CC v7 I exported a ProRes 422(HQ) file to MPEG2 and selected the HD 1080p 23.976 preset. I needed the finished file to have a minimum bit rate of 50Mbps and the color space to be YUV422. I was way under the minimum bit rate and the color space was incorrect. Can someone please instruct me on how to achieve my desired results. Thanks!

The source frame rate is 23.976, so I guess I would go with 24p. My intention is to upload the file to a streaming video website. They have their specs laid out for me, I just happen to be new to all of this so I am having a tough time meeting them.
My question right now is, if i have selected the MXF OP1a XDCAM option with XDCAM 50 NTSC (4:2:2) video codec, will the export be in mpeg2 and what will my bit rate be? I have no way of viewing the bit rate with this configuration.
Here is a screen grab of their required specs:

If I have converted my purchased iTunes songs to a lower bit rate what will happen when I join iTunes match? Will they match up or will these be stored as duplicates of the same song?

If I have converted my purchased iTunes songs to a lower bit rate what will happen when I join iTunes match? Will they match up or will these be stored as duplicates of the same song?
I ask because I primarily use my work laptop which has limited space so I usually convert my purchases to 160k from 256k in order to save space. I want to sign up for iTunes Match but I'd like to know before I do so I can understand how I will have to set up my library.

crichton007 wrote:
What I may do is start a brand new library there, copy my tracks from my work laptop using Home Share and then the script to get things in sync before starting over again there too.
Why create a new library? Just add the tracks from the laptop to the existing library on the Mac.
crichton007 wrote:
I was just hoping to hear definitively whether or not there was some sort of intelligence built into iTunes Match that would match these up...
How do you mean? If you down-convert purchased tracks you've fundamentally changed the files so iTunes can no longer recoginize them as "purchased." And, indeed, they no longer are since they are brand new files. Of course these new files will only be "matched" or "uploaded."

Is it possible to raise the bit rate of songs higher than 256 on iTunes? If not what should i use or do to raise the bit rate of songs?

Is it possible to raise the bit rate of songs higher than 256 on iTunes? If not what should i use or do to raise the bit rate of songs?

Songs you rip from CD can have their bitrate increased to a maximum of 320Kbps from the iTunes preferences; alternatively, the default encoder can be changed to a lossless one. Songs from other sources have a fixed maximum bitrate.
(67928)

What are the best data and bit rate setting for uploading from final cut express to Youtube?

Can anyone suggest the best data rate and bit rate presets for uploading footage from final cut express 4 to Youtube? What settings will provide the best resolution, quality, and match the current youtube requirements?
Thank you in advance for your help,
Susan Kayne

It depends on whether you are using aspect ratios of 4:3 or 16:9.
Below is some simple guidance that will provide good quality with reasonably small file sizes.
The first part is for 4:3 video:-
1. File>Export Using QT Conversion.
2. The "Format" window should say, "QT Movie".
3. In "Use" select "LAN/Intranet" from the dropdown menu.
4. Click "Save" and when it has finished encoding, upload it to YouTube.
If you are making 16:9 video (Standard or High Definition) do steps 1 to 3 above.
Then when you have selected "LAN/Intranet" press the "Options" button and in the new
window that opens press the "Size" button and change the "640x480" to "853x480"
To do this you will have to click on the 640x480 and a dropdown menu appears.
Select "Custom" from the bottom of the menu and in the window that opens
you will see 2 boxes.
Put 853 in the first box and 480 in the second.
Click OK.
Then Save it.

What is the maximum bit rate for a short NTSC standard def DVD?

I have about 30 minutes of content from FCP that I want to put on a DVD.
At first I tried iDVD and had problems with burning (although I did somehow make one DVD). So I built the project on DVD SP and made a DVD. However, the iDVD version looked much better. I checked out the file sizes and saw that there was 2 gigs on iDVD and only 1.6 DVD SP. Then I discovered the encoding options on DVD SP and I was curious what is the recommended average and maximum bit rate should be for the highest quality, yet still works in most DVD players?
Thanks.

DVD Bandwidth
The rate is not based on running time.
Some thoughts on rates
7.2 - 8.0 seems to be the general consensus for discs from computers. I play more conservative for the reasson listed in that link

What bit rate to record for editing with iMovie?

I just bought a Sony hd pj260 video cam and need to know what to set the bit rate for shooting to edit on a MacBook pro using iMovie (snow leopard). I have a choice of 60p (28 M), 60i (24 M) or 60i (17M). I'm sure these will mean something to someone. They currently are Greek to me. Can someone advise me please. Leaving for vacation in a couple of days....
Thanks
DJ

60P wlll not work with iMovie, unless you are comfortable hacking the internals of iMovie.
60i will work and the higher bit rate, the better.
Best would be 30P.

What is "Total bit rate"?

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