MPEG-1 bit rates

I'm making up an MPEG-1 file in Cleaner 6 for a CDROM.
With a 2-Pass, Variable Bit Rate setting, what should I be setting as my Bit rate, (which I'm assuming is the max rate in the variable option I've chosen...?)
Default is 1.5 Mbps, but it can go up to 3 Mbps.
I'm assuming a higher bit rate will make quite a difference in final quality?
Is the limitation for playing back off the CDROM directly or are there other considerations.
I could have my client download the file from the CDROM to his hard drive if that would give better playback.
Thanks,
LEE

All very valid points...
We've had all this out with a very stuborn client who insists that the file must be playable from any laptop even if its only equipped with a basic CD reader.
Programme length is 30 mins and there's no other acceptable way of getting the media into people's computers than via CD.
I hate MPEG-1 and if you could see our beautifully crafted and graded pictures you'd see why...!
Alas it's all I'm going to be allowed to do. I've tried a 1.5 and 3Mbps transfer - both with 2-pass VBR and can't see a whole lot of difference so I'll probably use the lower rate.
If I change the size of the image at transfer will that give a better result than letting my client view the pictures larger by stretching the QT box bigger. It would be nice to have the programme start a bit bigger than just a thumbnail - although I appreciate that will degrade the quality.
LEE

Similar Messages

How to encode 50 MB constant bit rate I Frame only MPEG-2 Program Stream

I want to do a test upload to a digital programme delivery service. I'll be encoding a short clip for FTP upload.
The specs the company sent says material should be encoded as follows:
"50 MB constant bit rate I Frame only MPEG-2 Program Stream direct from digital source."
Can anyone translate this into Compressor settings?
Material also must have timecode.
Thanks

50MB constant bitrate? I hope you meant 50 Mbps... hehe. Hmmm... 29 Mbps seems to be max, using Compressor.
To get a constant bit rate (CBR), choose One Pass CBR under the Quality tab in the Inspector.
I am not sure if Compressor can do I-Frame only, but it can give you an IP GOP structure. Setting the GOP Structure to IP, and the GOP Size to the lowest possible gives you the best possible quality, but also the largest file size.
For audio, choose AIFF, and make sure it gets the same name as the .m2v, but of course with the right .aif suffix.
To make an MPEG-2 Program Stream, you need to use MPEG Streamclip (freeware).
Open the .m2v file in MPEG Streamclip (the audio should automaticly load with the video file if they have the same file name). Choose the file menu and choose Covnvert To MPEG Using MP2 Audio.

How do I adjust audio bit rate in MPEG-2 Program Stream?

I don't see any way to adjust the audio bit rate in the MPEG-2 Program Stream setting in Compressor 3.5.3. I need a specific bit rate of 224 KBps within an MPEG 1 Layer 2.
Thank you.

AFIAK, there is no way within the preset adjustments to change the audio – either in 3.5 or 4.0
Try this for a work-around. Choose the MPG-1 setting, open Inspector and disable Video. Adjust the audio rate to 224 in the Audio tab. Submit and you should get an audio stream. In a separate job choose the MPEG-2 settings. Open the Inspector>Encoder Tab>Extras and deselect multiplex. Submit and Compressor should spit out an MPEG-2 video stream. You should be able to multiplex them in Mpeg Streamclip. (The files need to have the exact same name prior to their respective extensions.)
Good luck.
Russ

50 MB constant bit rate I Frame only MPEG-2 Program

'50 MB constant bit rate I Frame only MPEG-2 Program'
What does that all mean, and how do I go about to find all these settings?
It's for a commercial.
Niel

You're going to have a much easier time doing this in Compressor 3 than in 2, but what I'm assuming you're talking about here is a Program stream (multiplexed file) very similar to a transport stream.
These MPEG-2 encoded files are used for broadcast and have both the audio and video contained in one file as opposed to DVD which requires those assets separated into elementary streams.
If you're using Compressor 2, create a custom MPEG-2 setting and in the extras tab of the Encoder Pane select the Multiplexed option. Note though, that you will only be able to take the bit rate up to 20Mbps and it will only create a transport stream.
In Compressor 3 you can choose between Program and Transport streams and you can increase the bit rate up to 40Mbps.
BG

Problem with bit rate ?

Hi there,
Using FCP7.
After compressing a FCP project with Compressor and burning DVDSP with DVDSP, I realized that scenes containing objects or people in rapid movement where showing jerked images.
The slow motion scenes are fine.
I checked the following
settings for DVDSP burning: VBR two pass;
averageBit rate 4,0,
max rate 7,0
1) the self-contained QT that I started with is not showing this problem.
2) the m2v file obtained from compressor (I use preset setting for high quality compression) does not show this problem when I view it with MPEG streamclip
3) I tried to burn directly the QT file with Toast 10 …get same problem if not worse !.
settings for Toast
automatic re-encoding
average rate 4,0 Mbps
max bit rate 8,0 Mbps
MPEG-2
I guess my problem comes from the bit rate I used ?
I am now confused and I am not sure I understood the impact of the bit rate setting on the quality of the resulting DVD, and I believe that using a high bit rate in DVDSP might result in problems for some clients to play the DVD on their player ?
Could it be something else ?
could someone please give me advice ?
Many thanks in advance
Ivan

I can only think of two possibilities based on the info available:
1. Old DVD player (choking on the bitrate spike)
2. You need to set some compression markers around the scenes while in FCP. This would flag Compressor to pay extra attention to that area. After you output the new clip, I suggest you use the standard High Quality preset (in Compressor) for your program duration e.g., "Highest Quality 90 minute". Don't get creative with the encoding set-up. And ALWAYS used AC-3 audio.

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

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.

How change bit rate

I use Compressor to compress video from FCP. I select dvd best 90 min 4.3 (mpeg-2, two pass VCR best average 5.0 mbps - maximum bit rate 5.8 mbps). After compressing, file show 6.2mpbs. I want to reduce file size. I could not figure out how to reduce even I reduce more on average bit rate and maximum. Is there other place I might oversee. Compressor, I still learn how to use.

Hi
You'll find this tutorial very useful: Building Custom Presets in Compressor 2 , no matter you run version 2 or 3.
Hope that helps !
Alberto

Encoding error- Muxing bit rate too high

hi,
i am trying to burn my project which has 2 videos of 10 minutes each.
one of those videos has 19 subtitled tracks and simple sub-menus. All the video was encoded in compressor and i tried both a VBR and CBR. I am only using audio that is AC3. For bit rate setting i am using 6 and a max at 7. The muxing craps out about 33% though. When i open the last file in MPEG Clipstream, i can see it dumps out at about 8 minutes but there is nothing on any of the subtitle streams that appears out of place. Total project is under 1 gig in terms of space so i am not sure why i having problems. i also posted this on the dvdsp forum but so far, no one has been able to help solve the issue. please help. thanks.

Eric suggested:
"Try trashing your preference and getting rid of any PAR file associated with the disc and rebuild. Delete your old asset from the import window and trash it on your computer as well. If that doesn't work I would build the project from scratch and try again. Im looking for the data rates for a subtitle but I cant find it right now. But 6 mb/s CBr should be good."
What happened when you tried this?

How to determine the bit rate with button over video subtitles?

I have a project where I've got several questions that come up on the screen. The DVD is subtitled in 14 languages, so depending on the language chosen, it will show the question in the proper language along with navigation buttons to go to the next question or track.
The problem is this: I added several new questions that each have a black only video that runs about 1min with 14 subtitle tracks made from photoshop psds. When I try to build, it fails saying "bit rate too high." When I removed all but 5 of the subtitle tracks, then it would build. I came up with a workaround, but then hit the limit of 99 tracks, menus or stories on a DVD.
I went back and tried combining all 3 questions in to one slide, but now with more information on the psd, it will only allow 3 subtitle tracks before it reaches the max bit rate.
How does it determine the bit rate? What can I do to lower the rate? I tried compressing the video at the lowest bitrate, but it didn't' help. I tried changing the psds to much smaller jpg files, but it didn't change anything. If anyone has any suggestions, please let me know!
Thanks.

CS,
Almost all DVD SP Tracks should first be completely constructed in a Sequence in FCP, the markers placed there, and then everything encoded into a single Mpeg 2 clip with matching length audio (even if just low bit rate AC3 silent audio, as the case may be, because all Mpeg 2 clips in the Title domain should be accompanied by an audio stream), and then imported into DVD SP.
Lay your subtitles under that and see what happens.
Take care,
Trai
TFDVD Research Labs

Mediainfo wont give me the Max Bit Rate Capability all the time. Is there other information I can use to convert to obtain this? Thank you

Below is the information I received from Mediainfo. Is there a way I can figure out the the maximum Bit Rate Capability with this? Lately I have have had movies stop half way through and I think I think the MBPS is too large on some of them. On some moveies Mediainfo will give me the MBPS.
Thank you
Video
ID : 0
Format : MPEG-4 Visual
Format profile : Advanced Simple@L5
Format settings, BVOP : 2
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Muxing mode : Packed bitstream
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 1h 54mn
Bit rate : 2 060 Kbps
Width : 720 pixels
Height : 304 pixels
Display aspect ratio : 2.35:1
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.314
Stream size : 1.65 GiB (90%)
Writing library : XviD 64

Hi, I just watched the video for the Microcell and you have to use your broadband connection to get it to work and the problem is my broadband connection is down the times I'm using my 3G. That's why I use it, because my broadband connection is not working so much of the time.
Any other suggestions? :-)
Martha

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.

Is my bit rate too high?!

I'm new to DVDSP but thought I'd figured it out. I'm burning a 30 minute film, with 13 chapters, to HD-DVD. The simulation works fine, and the build and format seems to go through fine, but the resulting dvd works only on my computer (that I burnt it on).
It suddenly occurred to me that maybe by encoding settings are wrong, that perhaps the bit rate is too high? So only my computer can play it...?
The video file is a full 1920x1080 quicktime movie, and the MPEG-2 HD encoding was on about 18mbps, with a max bit rate of around 26mbps. (The footage itself is orginially 35mbps, but that's enormous for an encoded DVD, no?) Perhaps that's why it's saying that the DVD wil be 4.6GB, even though it's only 30 minutes.
I've knocked the bit rate down to 13mbps, with a max of 16mbps. I'll try another burn with those new settings.
Does it sound like I'm onto something here?!
Thanks,
Jamie Kennerley

From your master sequence, you should be exporting an uncompressed (or lossless) 720x480 (NTSC) 16x9 Anamorphic 23.98 file. Bring this into Compressor and adjust your bitrate according to time. The best way is to get a good bitrate calculator. Here's a simple one thats works good:
http://www.videohelp.com/calc.htm
Based on the amount of TIME of your piece you would adjust your bitrate and encode.
1. Export out an uncompressed or lossless 720x480 16x9 Anammorphic @ 23.98 (4444 is a waste since you're not dealing with any Alpha Channel for the encoding)
2. Determine how many minutes you have and find the optimum bitrate with the calculator
3. Plug your file into Compressor and set the correct bitrate and Encode
DVD has a max bitrate of 9.8 for Video so you need to keep it well below this. The only reason you should be going above 8mb/s is if you plan to replicate your disc. Even with that you should be checking your bitrates with a bitrate viewer to make sure every things Ok

Bit Rate too high Error - have specific details about files - please help

Hello-
Just finished a project and went to burn the first DVD. It starts muxing the first mpeg2 video file and comes up with this error. Below are the specs for all the files on the DVD. Please take a look and let me know where I went wrong. Thanks a lot.
Tom J
All video files are:
MPEG-2 60 Min High Quality Encodes out of compressor
All Audio is:
AIFF Stereo 16bit 44.1KHZ
All video and audio lengths are the same, some video tracks have multiple audio tracks
Title---------Video Length--------# of Audio Tracks--------
Main Menu----1:34:27--------------1-----------
Sub Menu 1---30:00----------------1----------
Sub Menu 2---30:00----------------1-----------
Video 1------4:32:00--------------1-----------
Video 2------3:09:00--------------3----------
Video 3------6:25:08--------------3----------
Using my superdrive to burn on a Imation DVD-R 8x
Disc Meter in DVDSP reads 1.3 GB

Hey David-
The total running time of all video (including video
for motion menus) is 1001 seconds (the book told me
to break it down into secon ds).
As far as the bit rate, I checked it and am exporting
currently to a max of 5 with an average of 4.5 (for
the video).
The audio is AIFF all the way, I think encoding in
Dolby is something a newer version fo compressor
does. I have FCP 4.5 with DVDSP 3.
I did export the audio as PCM AIFF, didn't shrin kthe
size in fact enlarged it slightly.
Do you figure if I have a bit rate max of 5 on video
with 3 1.5 bit rate audio tracks, I'll be all right?
Tom J
With your version of FCP & DVDSP, you'll need to encode the audio into Dolby Digital 2.0 with A.Pack, which is a separate program on your hard drive. With Final Cut Studio, Apple did away with A.Pack and merged its functionality into Compressor.

Bit rate too high DVDSP, build stops.

DVD Studio Pro used to be DVD Maestro from Discreet, but I was thinking since Apple bought it long ago, it would have a forum. I searched for DVD and DVDSP and only came up with this forum.
If anybody in here uses DVDSP and if you know the solution I would appreciate help with this.
Upon building this, I did lower the bit rate to a lower size after getting the error message.
As of now I have the BR between 4.2 and 5.2 as the max br.
I'm concerned if I lower it anymore it will start looking like a pixelated mess. Does anybody know how low you can take the rate and still have a good looking project?
The project was taped in HDV. However I encoded it using compressor so I don't think it's an HD file anymore that DVDSP can't read. In the settings you'll see "SD".
I'm using DVD Studio Pro 4.
The settings I used for compressor were:
Video:
Name: MPEG-2 6.2Mbps 2-pass
Description: Fits up to 90 minutes of video with Dolby Digital audio at 192 Kbps or 60 minutes with AIFF audio on a DVD-5
File Extension: m2v
Estimated size: 2.79 GB/hour of source
Type: MPEG-2 video elementary stream
          Usage:SD DVD
Video Encoder
          Format: M2V
          Width and Height: Automatic
                    Selected: 720 x 480
          Pixel aspect ratio: NTSC CCIR 601/DV (16:9)
          Crop: None
          Padding: None
          Frame rate: (100% of source)
                    Selected: 29.97
          Frame Controls Automatically selected:
                    Retiming: (Fast) Nearest Frame
                    Resize Filter: Linear Filter
                    Deinterlace Filter: Fast (Line Averaging)
                    Adaptive Details: On
                    Antialias: 0
                    Detail Level: 0
                    Field Output: Same as Source
          Start timecode from source
          Aspect ratio: Automatic
                    Selected 16:9
          Field dominance: Automatic:
                     Selected Progressive
          Average bit rate: 6.2 (Mbps)
          2 Pass VBR enabled
                    Maximum bit rate: 7.7 (Mbps)
          High quality
          Best motion estimation
          Closed GOP Size: 15, Structure: IBBP
          DVD Studio Pro meta-data enabled
Audio:
Name: AIFF 48:16
Description: 48kHz, 16-bit AIFF stereo audio
File Extension: aiff
Estimated size: unknown
Audio Encoder
          16-bit Integer (Big Endian), Stereo (L R), 48.000 kHz
Error message from DVDSP
Starting DVD Build BIG_DADDY_DVD...
Compiler Initializing...
Precompiling Project BIG_DADDY_DVD
Compiling VMG Information...
Created 8 PGCs in VTSM1
Created 8 PGCs in VMG.
1 Menu(s) will be created...
Compiling Menu PGCs...
Compiling Menu#1 (Menu 1)...
Rendering Menu:Menu 1,Language:1...
Generating Transition: VTSM #01, VOB #1...
Writing VIDEO_TS.VOB
1 VTSs and 1 Titles will be created...
Compiling VTS#1 (Big Daddy compress video)...
Muxing VTS_01_1.VOB
Video Bitrate Too High
Build cancelled
Building was not successful. See log.
I tried the same project in IDVD and it worked like a charm the first time

There is still a DVDSP Forum - it's under Final Cut Studio at https://discussions.apple.com/community/professional_applications/final_cut_stud io
Select "refine this list" in the blue button to nake it easier to find DVDSP related issues.

MPEG-1 bit rates

Similar Messages

Maybe you are looking for