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.

Similar Messages

When is the h.264 bit rate issue going to be fixed?

If you export a project in After Effects using the H.264 codec the file you export does not have the correct bitrate. Meaning if you export a video at 1mbps compression rate you will not get a video that has 1mbps bitrate. This has been an issue since day one along with header issues in the .mp4 file. Please do not tell me not to use AE to create H.264, this is what we used and works fine in CS4. The same issues arrises when you use Adobe Media Encoder CS5.
Does anyone have a solution or anyone from Adobe have any suggestions?

Thanks but that didn't help.
I believe I have found out the actual issue. CS5 will not render a project above the lowest bitrate of the source video for H.264. So if you have a video file at 300kbps it cannot be rendered above that point. This is a problem when you understand how bitrates\codecs work. Not all codecs need an extremely high bitrate in order for the quality of the content to look good. We use the TechSmith screen capture codec a lot. This codec is create for screen capturing, it provides a low bitrate file which is small in size and easy to handle. We have been using this combination with the CS package since before it was CS. The videos we procude look great in CS4 but awful in CS5. When using mediainfo to check out a video file compressed in CS5 it gives us a Bit Rate and a Normal Bit Rate. Normal bit rate is what is requested, say 1mbps and the actual Bit Rate is what the source material was.
In any case the video files look like crap because a 250kbps .mp4 looks awful compaired to a 250kbps video using the TSCC codec. So yeah, not using CS5 and most likely won't be doing any more upgrades in a while. I'm responsible for purchasing over 10 licenses. Just wanted to let Adobe know they won't be getting that money again for a while until they figure out there compression issues.

More bit rate issues

I am burning a reel on Studio Pro 3. However, the bit rate is too high. This doesn't make sense to me as it is only 5 minutes of mpeg-2 video from final cut pro. I have compressed the audio however that doesn't seem to help either. I need the quality of the image to be at it's highest so I assumed becaue it is such little runnning time that I could maximize the bit rate to 9 and put the motion estimator at best and do a two pass VBR. I am using a 4.7 GB dvd. Is there anything I can do to get the best quality image without the bit rate preventing the burning?

9mbps is overkill with VBR or CBR.
8mbps can be overkill sometimes too.
Using Compressor with DV footage, 7.0 average, with a 7.4 or 7.5 high is fine.
AC3 should be at 192 or 224kbps.
With Compressor, anything over 7.5 is just a waste of file size and doesn't make the file look any better.
See how that goes.
If you had 9mbps for video and 224 for audio, then you were maxing out the overall bitrate at 9.25mbps.
Even 8.25 might be too much on some players.
7.75 is your max, maybe 8.
Hope that helps.

Nokia E63 bit rate issue

Hi,
I have a mp4 file with high bitrate (561kbits) during playing, It pauses/stills for a while.
E63 supports up to how many bitrate per seconds?
Thanks in advance.
Nimesh T.
Solved!
Go to Solution.

There are two converters available; ImToo (Commercial) and AnyVideoConverter aka; AVC Free (they have a free version)
Both are pretty simple to use; Just select "MP4 Profile" set the bit-rate, Screen resolution and hit convert. (i don't see anything complicated using both)
So try those, Specially AVC, due to the fact its free.
Good Luck.
Previous Phones: 6600, 7610, 6230, 6230i, 1100, 1112, N70, N73, N95, N95 8GB, 5800XM, 5230, C5, iPhone 3GS, SE Xperia X10, N900, N8, SE Xperia Arc
Current Phones: Nokia N9, iPhone 4

Bit Rate AAC Issues

I have been having some issues / confusion : First off I'm not sure if my settings are set right or not. I am importing with the AAC Encoder set to custom.
Stereo Bit Rate : 192 kbps
Sample Rate : Auto
Channels : Auto
Check Mark in : Use VBR
Now is this a good setting? I want @ least cd quality in an AAC format.
Issue: Not just my Imported cd tracks but the tracks purchaced from the itunes store all seem to play @ a Quiet Volume having to crank up both the Machines Volume and iTunes to almost max, plus with the EQ Preamp put to +10dB. It could just be the headphones, they are old.
Any tips or help on settings would be great. Thanks!

You're welcome. I use the default import settings of AAC 128 Kbps. This works well for me, but each person is a little bit different. For example you like 192 better.
I also use Apple Lossless for the live music I download, but when I want to take that music on my iPod I transcode it to 128 AAc.

Issues with bit rate on Itunes purchases

For some of my purchases I cannot seem to upgrade the bit rate from 128kbs? How do I do this. also, some of my album purchases seem to have disappeared. How do I get them back? regards Edward

I know that Itune sPlus ended but I understood that you could delete your downloaded files and redownload them and they would be at 256k. is that correct?
Edward, Yes, if you subscribe to iTunes Match. Look at this document, and read the section on "Can I upgrade my previously purchased music to iTunes Plus?":
http://support.apple.com/kb/HT1711
iTunes Match costs $24.99 in the USA iTunes Store, probably a bit higher in the UK Store.
I have an album that seems to have disappeared from my purchases on the itunes store. how do I get that back?
Do you mean that it disappeared from your library? If so, and assuming it is still available in the store, you can redownload fresh copies by following the link in my earlier post. This action does not require Match.

Issue with playing 320 k bit rate files on iOS 5

I was able to successfully update my iPhone 4 with the iOS 5 however to my (unpleasant) surprise I realized that all the music files of 320 K Bit rate that I had could not be played with this new OS. All other music files (of 128 K bits rate) was able to play normally.
When I attempt to play the higher bit rate ones, it doesn't give any warning or crashes. The Play symbol at the bottom changes to "Pause" indicating it's playing and when clicked again it changes to "Play" indicating it's paused. But the time slider stays at 0:00
It may be noted that the high bit rate files plays normally on the latest iTunes software on my PC running windows 7.
I haven't yet tried to remove all the paylists first and then add them back when syncing it next time. That might solve this problem but I am not sure. Even if it does, this is a major defect with iOS 5 that has gone un-tested. with the previous version, I had no problems playing the same high bit rate music files.

After I faced the above problem, I did the following:
1. Sync the iphone after unchecking the playlist having the 320 K Bit rate music files. As expected the playlist was removed from the iPhone.
2. Checked the playlist and then re-sync the iphone. This time when the music files were copied to the phone, all the files having a bit rate higher than 128 K were automatically converted to 128 K Bits.
The above process made these high bit rate files convert down to 128 K bits and playable on the iOS 5.
The question is why is iOS 5 not able to play the bit rate higher than 128 K Bits while the older version could? Does playing the high bit rate files offer any better sound quality on iPhone?
I have played the high bit rate on my car's audio system (Harmon Kardon premium speakers) and it definitely sounds better than it's 128 K bit equivalent.

Controlling output video bit rate in FCPX

I ran into a problem: I created a mp4 file with Share/Export File… (settings: Computer, H.264 Faster Encode, 1920x1080 - edited from an HD camera): its video always freezes at a definite point when played on my BD Player connected to my HDTV through HDMI (audio instead continues on the frozen image).
It seem that the issue is a sudden video bit rate pick of almost 50 Mbps while its average is around 20-30 Mbps. It is not clear to me if this freeze is caused by the BD Player or by the HDTV not being able to handle such pick.
As a test I used Compressor to control the output bit rate (settings: average 20 Mbps and pick 25 Mbps) and this seems to fix the problem. To be more certain I should do more tests, but I'm confident I found a possible solution.
I'd like to know if there is a way in FCPX to control such picks (without using Compressor), either in the Share commands (but it seems to me that they don't provide enough setting controls) or in the timeline. By watching the Video Scopes I can see a quite strong signal in the area where the output file has the bit rate pick. But I don't know any way to have a measure useful to identify them before sharing and avoid a trial and error approach...
Piero
Below the critical point...

Tried to upload a PDF instead of PNG, but no luck. The picture shows a quite standard (I'd say...) image but with highly dense graphic of Y' component in the Y'CbCr Parade (in the limits of 0-100 IRE): much more dense than most images in the rest of the movie. So I assume this might mean a higher bit rate... but it's just an assumption.
Let me summarize my tests:
1st test: FCPX: Share/Export File.. (settings: Computer, H.264 Faster Encode, 1920x1080)
- copied the .mp4 file to USB drive
- USB drive into a BD player connected to HDTV through HDMI >> freezing effect
2nd test: FCPX: Send to Compressor - Compressor: Create Blu-Ray Disk (on Hard Drive) and Video Job with standard Video settings (Automatically select bit rates = ON)
- Played the .img disk with "Mac Blu-Ray Player" on my iMac >> same freezing effect in same position as before on HDTV
3rd test: FCPX: Send to Compressor - Compressor: Create Blu-Ray Disk (on Hard Drive) and Video Job with customized Video settings: Automatically select bit rates = OFF - Average = 20 Mbps - Maximum = 25 Mbps
- Played the .img disk with "Mac Blu-Ray Player" on my iMac >> NO MORE freezing effect (and smaller file by 30%)
I might do more tests (mainly on my HDTV) but I believe the point is the bit rate... and the only way to control it is by using Compressor.
So now my question: is there a color setting that helps in controlling such situation ? e.g. lower saturation, or lower exposure, maybe in mid tones or highlights, or what ?
Thanks so much for your help
Piero

How Can I Make Encore Create a Bluray Image that uses a Bit Rate that Really Fills The Disc?

I have searched and browsed but have not seen this specific issue.
I realize that if you leave the bit rate alone, Encore will use the best bitrate. In my experience, it doesnt. I have also found that the Disc Info on the Build tab is never correct. The final transcoded size of the ISO is always very different from what is shown.
With the current disc I am making, I am encoding 4 HD m2t video files that total 20 GB on disk. The total running time is about 1hr 50m. Leaving everything set to defaults, the final size of the ISO file is 12 GB. I would like the final size to be around 20GB. I would expect that Encore would do this automatically. Changing bitrate in the project settings and re-transcoding does not change the final size. If I manually set the encoding, the size does change but since the Disc Info is unusable, it is excruciating trial and error. You have to pick settings that you think will work, wait hours for it to transcode, then it is way to big or way to small. I cant figure out how to get it to my target size.
Also, when I transcode the files, Encore never lists the bit rates of the transcoded files. The field is always blank.
It may also be note worthy that I have to first transcode the files, then build the disc. If I dont do that, the transcoding will hang. Even when I do separate the steps, sometimes when I build the disc from the transcoded files, the build of the disc still hangs.
I am running a 3 GHz Quad CPU with 4 GB of Ram in 32 bit XP Pro. I have 5 physical drives of 500 GB each. I also use separate physical drives for the source files vs the target ISO. Disk space is not an issue.
Also, is there any timeframe for when Adobe is going to release a new update? I have also run into other problems on this forum like the wonderful error 6 and the hanging transcoding, although my solutions to both problems were different than what was posted. It is all hit or miss.
Does anyone know if Adobe going to add a feature like on other disc authoring programs where you click a Fit to disc button and it then calculates the best bit rate for the specified disc size? That would make me very happy.
I would appreciate any help here.

Encore does have a fit-to-disc feature, called "automatic transcoding", which chooses the bit rate based upon how much media there is to encode, how much room is currently on the disc, and applying format-legal restrictions (minimum and maximum bit rates allowable by the format).
So for instance, 30 minutes of video will never fill a disc because the required bit rate to do so would be higher than allowable by the format.

ITunes 7 and Shuffle:"Convert higher bit rate songs to 128kbps AAC" broken

This has become unusably slow in iTunes 7. Is this fixed yet? Does anyone have a workaround?

I have the same issue but with my iPad 2 and iPhone 3GS. Songs play fine in iTunes. If is uncheck Convert higher bit rate songs to 128kbps AAC the no more scratching sounds on my devices.

320 & 128 bit rate in iPhone.

I haven't found an option that lets you choose the bit rate you want to convert your music to in my iPhone. All my music is 320 bit rate or lossless... So it's going to take a chunk of space. I'm converting the music I want on my iPhone to a 128 bit rate and throwing that in a playlist to sync to my phone... which I really don't want to do because now I have the same albums twice and it's makes my library messy. Any quick fix or solutions?

I can't speak for iPods cause I never bought one. I've always been the kind of person who rather have one device (Moto Razr V3i w/ iTunes) then two devices (reg. phone and an iPod). My phone would covert the music to 128 bit rate to optimize space. It would make sense that apple would give us an option to convert the size of our music files to optimize space as well. This making duplicate albums in two different bit rates is a hassle! Unless you've gone into Edit > Preferences > Advanced > Importing... the music you rip on your computer is going to be a defult ACC 128 bit rate format. Which there is nothing wrong with. If you share music with friends and they don't have iTunes there's going to be an issue. So I changed my encoder to MP3 and also adjusted the audio quality. You tend to lose lower frequencies when music is ripped at a low bit rate.

File sizes and bit rate slider

Hi,
I'm having two issues I'm hoping someone can help me with..
1) My file sizes are much bigger than they're apparently supposed to be. A 10 second clip at 720x576 takes up 32 MB. I've tried both quicktime h.264 and various avi codecs with roughly the same results. A larger 3 minute clip takes up over 500 MB. This is at 100% quality setting. I was told that they shouldn't take up more than 10% of that size so I'm not sure what's going on..
2) In order to solve it I've been told to use quicktime h.264 and adjust the bit rate slider to specific values, but PE7 won't give me that option, I can only move the quality slider. Setting that to a low value gives me extremely poor quality video. Using Sorenson codec allows me to set a bit rate, but at the recommended 1800 k/s I still end up with 22 MB for 10 seconds.
These videos were made through stills and transitions.. When I make similar stuff with windows movie maker the files are much smaller so something weird is going on for sure.
Hopefully I'm making a really obvious error that is easy to point out :D

This is for web use, but mind you there are plenty of sites that offer hd video so it's not a particularly high resolution..
I just don't understand why these files are so big considering the maths.
I've had 1800 kbit/s recommended as a decent compression level for web use. That's 225 kbyte/s or roughly 2.5 MB for 10 seconds. Yet as described above the files are 10 times that size. I don't understand why this is when I actually used this exact compression level.
Further, I was only able to specify bitrate compression with the Sorenson codec, not h.264, which is the one I actually want to use (and which I've been told should have adjustable bitrate in PE7 making me doubly confused..)

Encoding at different bit-rate that preset says?

Greetings,
I've run into a strange issue where Compressor 2 seems to be encoding at a different bit rate than that which I selected.
I have a 113min video sequence from FCP 5 that I am trying to encode to Mpeg-2 for a DVD5. I originally went in and selected the Best Quality 120min preset. I ended up with a 6.1GB .m2v file. I then went back in and customized a preset which brought the bit rate down to 3.9Mbps and max at 7.0Mbps, 2 pass VBR, best motion estimation. I then ended up with a 5.94GB file. THis was driving me nuts! When I pulled the m2v file up in an inspector window I noticed that it said it was actually encoded at 7.43Mbps not 3.9??
Has anyone seen this issue? This sequence takes 5hrs to encode on my G5 and I need to deliver this project on Wednesday. I'm running out of window's to test it out!
Many thanks!
Regards,
Dave Mungai
G5 Mac OS X (10.4.7) Dual 2.7 GHX PowerPC G5, 3.5GB RAM

never answered. Marking to get off my list

Video bit rate after conversion

Hello everyone,
Im wondering, if i have a file of x format, with 50Mb video bitrate, and I convert it using compresor 4 to ProRess 422, the result will give me a video with .mov extentin with video bitrate around 120 Mb, if I convert it to Proress (LT) it will give a result of around 70Mb video bit rate.
Will the new outputs have true clean bit rate, I mean the margine btwn 50Mb and 120 or 70, will it be showed , so will the new video show a better result, or it will just show same result at 50Mb. 2nd, in case I reconvert from Proress 422 (LT) (70 Mb) to anyformat (not necessarly using cpmpressor 4) to any format havn video bit rate again 50 Mb, will the output be the same of the original 50Mb that had the x

If you are concerned about this issue, do your own tests.
Make a copy of a representative sample of your original material in ProResHQ, one in ProRes422 and one in ProResLT
Put your original in a ProRes4444 timeline in V1 and one of the copies in V2. Apply the difference matte.
Do you see anything? Do the same process for all three variants of ProRes.
Now, convert the material to your delivery format and put it back in the ProRes4444 timeline on V1 and one of the ProRes copies on V2 and apply a difference matte. Again, what do you see?
If you see a solid screen of black, there is no measurable difference between the files.
If you do see artifacts, do an A/B comparison on a good grading monitor - sometimes stuff that shows up in the difference matte can not be seen by the eye even in dedicated A/B testing.
Have fun.
x
fwiw - all ProRes varients are 10 bit codecs. They are designed to absorb a great deal of editing/compositing without degrading. This is why you want to get any material that was acquired in a long GOP, compressed format OUT of that format as soon as possible if you will be grading, compositing or doing any work beyond simple cuts.

24 bit-16bit issue!

This is odd!
I have a project with all 24 bit regions. Then, If I import a 16 bit loop everything play in slow motion. Am I missing something obvious?
Then even if I erase the 16bit loop it keep playing slower then before.
All the audio files are 44.1 and there is no automation in Tempo Track.
Any suggestion?
Thanks Thanks
Higgins
MacBook Pro 2.33 160Gb 2Gb Mac OS X (10.4.8)

It does sound very much like a sample rate issue rather than a bit depth one, but if all your audio files (including the one you are trying to import) are 44.1KHz then that shouldn't be an issue...
I can think of one possible workaround. The exs24 is able to handle samples at a different sample rate or bit depth to the overall settings for the project, so try this: Import the loop you want to import as a sample into the EXS24 - if it is at the right tempo to begin with you can import the whole loop as a single zone and play it as one held note (ie a long sustain) then bounce the output as a new audio region and insert that into the arrangement.
I hope that might help you a bit.

Bit Rate Issues

Similar Messages

Maybe you are looking for