IPad compression parameters

We use Final Cut Pro 7 - and frequently compress our HD videos we make using Compressor. We use high end HD cameras, etc., and have beautiful results when compressing at, say 20 - 30mbs for display on HD monitors and televisions. We know how to compress for iPod and Apple TV, and various web sizes . . . but what parameters should we be using for the iPad?
I've read it plays up to 2.5mbs??
I hope I'm WRONG, because with fast moving subjects, you'll see a lot of pixelation at that low data rate.
I looked in the Compressor templates, but don't see one for iPad. Anyone know what settings we should be using? Or what's the highest data rate an iPad will play?
Thanks,
Larry

Hey Larry,
Another User has posted his own Compressor settings for iPad encoding here:
http://forums.macrumors.com/showthread.php?t=888988
Sorenson has already released a iPad codec for use with its Squeeze family of encoding software, so I bet Apple won't be far behind. Kinda surprising they didn't have one ready before the release.
Here is a download of the Sorenson codec:
<http://click.icptrack.com/icp/relay.php?r=15410390&msgid=298711&act=HP8L&c=1639 98&destination=http%3A%2F%2Fpresets.sorensonmedia.com%2Fapi%2FgetPresetXmlDirect %3FpresetId%3D58e7bb23-561c-4c9b-ac40-33d82b628acb>
Please post back here if you find anything else for Compressor.
I am in the hunt myself.
Best of luck.

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Data Pump Export Parameters

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Can you please explain me about CONSISTENT and COMPRESS parameters in Data Pump Export.
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Hi,
I'm currently trying to code an applet that will load a JPEG (or lossless image maybe), let you choose a new compression (quality) setting and then show the results.
I'm having a really hard time trying to figure out how to get this to work as I know there are firstly a few issues with an Applet and security when it comes to trying to put a loader in. Also how I'm going to either update, or show the new compression (quality) setting is a problem.
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I think you should be able to do this using the ImageIO functionality.
You'd need to do something like this,
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Actually -monitor- compression?

On Netware 6.5 -- does anyone know of a way to actually *monitor* file
compression activity?
The documentation says to do it via SET or MONITOR, but both of these seem to
only allow setting compression parameters.
Reason for the inquiry is that we have a volume that lost a huge amount of
diskspace overnight. 135GB just gone, only 15GB of that was newly-created
files, small number modified ... but we were doing a migration and 600GB+of
the compressed volume was "accessed" in the copy process. The access includes
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monitor or even log compression activity.
Am I missing something, or is the documentation wrong?
i.e.
https://www.novell.com/documentation...a.html#bbavwxb
> How to Monitor Compression Activity
>
> Monitor compression activity via the set commands Compress Screen parameter.
> For instructions on how to use the set command, see "SET" in the NW 6.5SP8:
> Utilities Reference.

Hi.
On 07.05.2014 03:59, DE wrote:
> On Netware 6.5 -- does anyone know of a way to actually *monitor* file
> compression activity?
nss /compscreen
But you have to watch it "live".
> but we were doing a
> migration
How, e.g what tool(s)?
CU,
Massimo Rosen
Novell Knowledge Partner
No emails please!
http://www.cfc-it.de

Unable to create iPod-playable h.264 files using Compressor

I've been running some video compression work for iPod, and have been able to do "quick & dirty" exports to iPod via QuickTime Pro (standalone & from within FCP).
To get more of a handle on the compression parameters than the default "Export to iPod" setting allows, I have had success using 3'rd party tools, and using customized settings in QuickTime Pro (most excellently discussed in Ken Stone's page here: http://www.kenstone.net/fcphomepage/video_to_ipodstone.html)
So far so good: successfully creating iPod-friendly files that meet the requirements: http://www.apple.com/ipod/specs.html
What I really want to do, though, is create a saved Compressor setting for setting up batches of iPod conversions, and so I don't have to hand-tweak each export in QT Pro.
I am running current version of QT and Compressor, but CANNOT create MPEG 4/h.264 files that will load onto an iPod for the life of me.
Here's how it goes down for some different Compressor settings, with their results:
1.)
File format: QT
File extension: .mov
Video: 320x240 15 fps MPEG-4 Video (note for those playing along at home that there is **no way** to specify h.264 nor "Baseline Low Complexity" in the Compressor dialog)
Audio: AAC
Result: a quick to encode, plain old MPEG4 file with only so-so quality that will load and play on an iPod
2.)
File format: QT
File extension: .mov
Video: 320x240 15fps h.264 (again: no way to select "Baseline Low Complexity" within Compressor)
Audio: AAC
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3.)
File format MPEG4
Extension: mp4
Video: 320x240 15fps Basic (0) ISMA profile, Medium VBR. Note that there is no way to specify h.264
Audio: 44.1/128 kbps
Results: Same as in #1 above
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Anyone have any thoughts?
Thanks-
John

OK.. first, thanks for the reply. Sort have had given up on finding an answer here and just checked back here yesterday. Lo and behold I do see the iPod setting on a newer machine- and started to look into why exactly it isn't on the main workstation here.
Turns out that you don't get updates unless the software is registered. Maybe it's just me, but I never bother with product registations (until today I guess).
So a word up to anyone else who does the same. You won't get FCP automatically updated unless you register.
I assume after I update everything I should be AOK
Also- I should have marked your reply as SOLVING my problem- but my first instinct was to say to myself "Of course I'm using current versions- what kind of jamoke does this guy think I am, anyway?" So, feeling very charitable, I marked your reply as merely helpful.
And now I have to eat my words! Sorry about that. Guess you'll get good karma points somehow. Maybe I'll look into that some more while I'm downloading updates this AM.
Thanks again!
-John

Error when merging large clips in QuickTime

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I am trying to merge two 2-hour clips into a 4-hour clip in QuickTime (OS X 10.7.2). If I combine very short clips and export for iPad all works. But the long clip combination generates an error "The operation not supported for this media." What is the problem? Is there a size limit I don't know about?
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If true, then depending on the original source files' compression format(s) and apps available, I might try one of the following:
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How do I convert a Quicktime file into an MPG2 in Compressor?

Every time I try to export my movie as an MPG2 in FCP, it locks up on me.
So I exported the movie as a regular Quicktime file in FCP and now I'm wondering what all the steps are to make the file into an MPG2 so that I can burn it to a DVD in DVD Studio Pro.

Just open Compressor and import the QT file.
Click on the 'Settings' button and choose a preset that matches your source meda format and gives you the compression parameters you want to use.
Click on the 'Destination' buttons for each and tell it where to send the file.
Change the 'Output file name'(s) if you wish.
Hit 'Submit'
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K

Better Photoshop integration for exported jpegs

Hi
Jpegs exported by LR have to be saved with new compression parameters if opened & then worked on in Photoshop. This can be very annoying & time consuming when working with numerous files which need a minor correction (such as dodging & burning which I would also like to see as part of LR) in Photoshop but which are not worthy of creating Tiffs or PSDs as intermediaries. Saving with new parameters cannot be automated with a Photoshop action (I've tried).
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Minor irritations on an absolutely fabulous program !

Color profiles, metadata or some such thing. There is a known issue where Preview will not work with images when they contain such data, but not always. Depends on which kinds of information are stored.
Mylenium

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Share photos, videos, and more
You can send photos, videos, locations, contact info, and voice memos. The size limit of attachments is determined by your service provider—iPad compresses photo and video attachments if necessary.

No use for tuner - Is MSI PVS necessary?

I have decided not to use the TV tuner on my TV@nyshere-Master card. Do I need to have MSI PVS installed for other capture programs to work off the composite or SVHS inputs?
Can the Radio be installed without the TVtuner part of the software?
I have basically gotten everything to work but the PVS software caused some problems. It seems that WinDVD Creator which came with my card works well and is more stable, though it does not seem to have the many compression parameters that PVS has.
Is there any other capture software that can be recommended?
It seems, except for the PVS software, this card is quite good. I just want to use it as a capture card for analog video!
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BMann

The card works great as long as you don`t use MSIPVS.
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Error while recording multiple screens using AVFoundation

Hi All,
I am trying to record primary and secondary monitor screens into two separate files using below code.
const uint32_t MAX_DISPLAY = 2;
CGDirectDisplayID displays[MAX_DISPLAY] = {0};
CGGetActiveDisplayList(MAX_DISPLAY, displays, &m_nDisplays);
NSString* dest_file[2] = {0};
NSURL* dest_path[2] = {0};
AVCaptureConnection *CaptureConnection[2] = {0};
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nil];
NSDictionary *videoAspectRatioSettings = [NSDictionary dictionaryWithObjectsAndKeys:
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nil];
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NSDictionary *codecSettings = [NSDictionary dictionaryWithObjectsAndKeys:
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videoCleanApertureSettings, AVVideoCleanApertureKey,
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nil];
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codecSettings,AVVideoCompressionPropertiesKey,
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dest_file[nIdx] = [NSString stringWithFormat:@"%@_%d.MOV",destination_path,nIdx];
dest_path[nIdx] = [NSURL fileURLWithPath: dest_file[nIdx] ];
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m_movie_file_input[nIdx] = [[[AVCaptureScreenInput alloc] initWithDisplayID:displays[nIdx]] autorelease];
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I am getting both the screens saved into two separate files. But while calling startRecordingToOutputFileURL API for the secondary monitor i.e. for the second pass of loop, I am getting an error as shown below :
VTCompressionSessionCreate signalled err=-8973 (err) (VTVideoEncoderStartSession failed) at /SourceCache/CoreMedia_frameworks/CoreMedia-1562.19/Sources/VideoToolbox/VTComp ressionSession.c line 897
Also compression parameters(bitrate) are not setting properly for Secondary monitor, it takes some different values other than the one I have specified in the program.
Can somebody please help me on this ? Also please let me know this is the proper way of doing this.
Thanks in Advance
George

Hi,
Check the following link:
http://www.sap-img.com/bapi.htm
Regards,
Bhaskar

Viewing Quality Factor of JPEG in Photoshop

Hi All,
I have a JPEG file which I am opening in Photoshop. I would like to know if there is any option in Photoshop which I can use to find out the quality factor with which this JPEG file has been compressed. I want to see the quality factor of already compressed file. Thanks in advance.
Thanks,
Sham

art by accident wrote:
The compression level sticks as an association. So if you try to resave it you'll see.
Edit: Never mind, I was wrong, it doesn't. (don't know where I heard that).
You weren't wrong. Photoshop DOES extract and reuse the JPEG quality level you saved an image with previously as the default for the next save, as long as the image was previously saved from Photoshop.
But since JPEG quality isn't really just a simple number under the covers, but a complex combination of several compression factors, it can't always be reduced to a simple "Photoshop equivalent" number, if the image is from a source other than a previous Photoshop save.
During its own saves, Photoshop simplifies the selection of the multiple compression parameters down to a single number between 1 and 10 or 1 and 12 (depending on which save function you use).
The answer to Sham is this: You can't expect to get a single quality "factor" for all JPEG files from every source. As an example, the parameters used to compress a JPEG file in your camera may not correspond to any of Photoshop's numeric values.
Paul's script looks like the best answer you're going to get, short of finding a full-on JPEG analysis application somewhere.
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Export Sequences for DVD/Continuous Play

Hello fine folks,
I've just finished my opus in FCP. It's 1 hour 45 minutes.
I edited it in 18 sequences. Now, I'm exporting into iDVD, and I want it be able to played continuously, as one long movie.
Or, of course, selectable by chapter (sequence).
Do I need to prepare my export files in FCP in a special way, or can iDVD handle it with regular (no compression) QT files?
Would you recommend I use DVD SP for this, as I have both (but am more familiar with iDVD).
Thanks.
John
Mac Pro 2.6 Mac OS X (10.4.7) 2 gb ram
Mac Pro 2.6 Mac OS X (10.4.7) 2 gb ram

Hello John,
you'll need to place your 18 sequences in a "Master Sequence" and add chapter markers for each chapter (sequence). Next export the movie to QT movie (do not use QT conversion). Make sure you check "self contained" and "include chapter markers".
Now import the QT movie into an iDVD project. In preferences, "Automatically create chapter sub-menu" should be checked.
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Would you recommend I use DVD SP for this, as I have both
The route via DVDSP gives you the possibility to do the MPEG-2 compression in Compressor, meaning you'll have greater control over compression parameters, thus improving video quality on your finished DVD.
hope this helps
mish

Video compression for iPad?

We use Final Cut Pro 7 - and frequently compress our HD videos we make using Compressor. We use high end HD cameras, etc., and have beautiful results when compressing at, say 20 - 30mbs for display on HD monitors and televisions. We know how to compress for iPod and Apple TV, and various web sizes . . . but what parameters should we be using for the iPad?
I've read it plays up to 2.5mbs??
I hope I'm WRONG, because with fast moving subjects, you'll see a lot of pixelation at that low data rate.
I looked in the Compressor templates, but don't see one for iPad. Anyone know what settings we should be using? Or what's the highest data rate an iPad will play?
Thanks,
Larry

Here's what the specs say is supported:
H.264 video up to 720p, 30 frames per second, Main Profile level 3.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats
MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file format
Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format
My unit hasn't arrived yet for me to do any testing.

IPad compression parameters

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