Editing a compressed file

So say I have a project in 1080i60 and i compress it down to an MP4 or just a smaller .mov at H.264. Then I delete the original 1080i60 but I need to change the volume level or cut out a small part of the movie. If I put the compressed file in FCP and export it...will it have the same compressed quality? I know obviously it wont be better quality....what is the best way to export it to maintain the quality...knowing that since it is already compressed?
Or the basic question...should you even edit a compressed file or just take your loss and re-edit the original 1080i60?

If all you are doing is cutting, then you probably will not be recompressing. An easy way to tell is how long it takes to export. It it looks like it will take a long time, then it is probably conforming and recompressing the video. That is bad. But it might be possible to cut out a portion, and save as a self-contained movie rather quickly.
You could try doing that with QT Pro, as it is sometimes clearer than FCP about saving video versus compressing video. Some codecs require conforming in FCP if you look at them funny.
As far as audio, I'm guessing you would be able to extract the audio and video tracks, modify the audio, and add the tracks back together. Again, I personally would feel better about this kind of track manipulation in QT Pro.

Similar Messages

Trying to edit the .js file again, but...I now have TWO .js files

RE: Putting a song into my iweb page, following Mike Wong's instructions with considerable and valuable help along the way from James Tseng.
I have spent all day working at this and failing countless times.
I finally got to the point where I was supposed to edit/change the .js file with the changes in height from 32 to 16, the controllers from true to false, the autoplays from false to true, and the loop from false to true.
Although I was not totally clear on what was going on, I slogged through it and had to re-do it and still have to re-do it because thus far the song is not on the page. Meanwhile, due to a townhall meeting that I went to, the site will be getting more visitors, and I want a song on that page.
MY QUESTION AT THIS POINT:
I have TWO .js files for that particular page in my iDisk. Shouldn't I have just ONE .js file? I started out with only one .js file and I worked on it and have no idea how TWO .js files got there with the .html files and all the others.
I was under the impression that if I changed something on that particular page and then republished, I would end up with a brand new fresh, up to date .js file. But No. I still have TWO .js files and at this point when I have to go back and re-do the information changes that I listed above, I do not know which .js file to pick.
Beyond that, I am disturbed (1) that I have TWO of those .js files, and (2) why, when I changed the page and republished, I did not end up with just ONE .js file, new and up to date and unburdened by the other two pages that may be wrong or who knows what.
If this is an omen that I should just quit tryingto put another song on my page, then maybe for now I will just relax and give it a rest. I do have ONE song on my page, but that was with a lot of hand-holding help and although I did take notes, I apparently did not take sufficiently good notes to see me through a solitary run.
I would appreciate any input on the issue of why I have two .js files and why republishing did not resolve said problem.
I don't feel that I should try to edit html on the wrong page.
Lorna in Southern California

Hi Lorna,
Somehow you duplicated your js file. No big deal;
but I don't know which one to tell you to delete.
Would it be a big deal to just republish your site
and start over?
.......... Lorna says ................................................
I just now did that. You can read my report in the post.
When you edit your js file with an editor, all you
will do is "Save" the changes. You're not going to
"Republish" the changes. Just click "Save" and
that's it.
.......... Lorna says ................................................
And that is exactly what i did! I clicked Save. Didn't get me my song on the page, though.
Assuming you have successfully converted/compressed
the audio file and that part of it is done, for now,
let's just worry about changing SIX WORDS in the js
file. That's all you need to do...republish the
thing and well get it figured out.
.......... Lorna says ................................................
I did. I selected the .js file. I opened it with Text Edit (learning so many new things.) I went thru all the text between thet two words <object and object>. And I clicked Save.
No song.
Lorna in Southern California

Need instructions for downloading a CD in non-compressed file format

Friends, I have purchased some woo-woo brain wave meditation CD that requires it be downloaded to my ipod in a non-compressed file format -- either .wav or aiff. I have absolutely no idea what that means or how to do it. HELP!!

Change your import settings to AIFF or WAV and import the CD. Go to Edit>Preferences>Advanced>Importing and from the "import using" menu choose AIFF encoder or WAV encoder: How To Choose Import Settings

Append to a compressed file

I have some test results that I want to save into a test result file. Since I will be accumulating many test results, I want to keep overhead down, so I would like to simply append the result to the end of the file. Here is what I have done...
1) Create an empty array, flatten to XML and write to a file.
2) When I want to add a record, I take the record control, flatten to XML, and then overwrite the </Array> at the end of the file with the XML record. I then append another </Array> onto the end of that to properly close it out.
3) I can then read this XML file back into an array of test record structures at a later time.
I chose to do it this way, because when I am generating the test records, I do not want the overhead of "file read->XML Parse entire file->append code->XML export appended structure->File write". I figured that by simply appending the XML record to the end of the file, I could cut down on a lot of this IO overhead.
The problem is that XML is a bit "chatty". I'd like to be able to read, write and append to compressed files (since XML compresses very well). The lvzlib routines only have a read and a write, but no append. My understanding of the compression schemes is that it makes a table of the common byte patterns and replaces them with shorter tokens. If I compress each record, I will have a table of tokens for each record that will basically be the same as all the other records. I can get better compression if I use one table for all records.
Has anybody implemented this, or do I need to dig into the guts of zlib?
Alternatively, can the normal File I/O routines be configured to work on a file in a compressed archive (like a zip file) and let the OS handle all the compression?
Thanks,
Brian Rose

Mister Rose wrote:
I have some test results that I want to save into a test result file. Since I will be accumulating many test results, I want to keep overhead down, so I would like to simply append the result to the end of the file. Here is what I have done...
1) Create an empty array, flatten to XML and write to a file.
2) When I want to add a record, I take the record control, flatten to XML, and then overwrite the </Array> at the end of the file with the XML record. I then append another </Array> onto the end of that to properly close it out.
3) I can then read this XML file back into an array of test record structures at a later time.
I chose to do it this way, because when I am generating the test records, I do not want the overhead of "file read->XML Parse entire file->append code->XML export appended structure->File write". I figured that by simply appending the XML record to the end of the file, I could cut down on a lot of this IO overhead.
The problem is that XML is a bit "chatty". I'd like to be able to read, write and append to compressed files (since XML compresses very well). The lvzlib routines only have a read and a write, but no append. My understanding of the compression schemes is that it makes a table of the common byte patterns and replaces them with shorter tokens. If I compress each record, I will have a table of tokens for each record that will basically be the same as all the other records. I can get better compression if I use one table for all records.
Has anybody implemented this, or do I need to dig into the guts of zlib?
Alternatively, can the normal File I/O routines be configured to work on a file in a compressed archive (like a zip file) and let the OS handle all the compression?
Thanks,
I'm not sure what you mean by appending. If you mean appending new data to an existing file in a ZIP archive this can't be done in any way. The ZIP file is not structured in a way that would allow appending data to an internal file stream inside the archive. I'm not even sure there is any compression scheme that would allow that. The only way for all standard compression schemes for this is to extract the file append the new data and then replace the existing file in the archive with the new one.
If you mean appending a new file to an existing archive then the newest released version 2.3 of lvzlib can do it. The ZLIB Open Zip Archive.vi function has an append mode input. Previously this was a boolean that indicated if a new file was to be created or if the archive should be tacked to the end of an existing file. In the new version this is an enum with an additional entry (adding to existing archive).
Rolf Kalbermatter
Message Edited by rolfk on 10-04-2007 09:21 AM
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Pull compressed file (.gz format) via FTP and place on Application server

Hello!
Greetings.
We have a requirement where a compressed file in the format *.gz is to be pulled via FTP and saved to the application server after extracting.
I searched the forums and found options to pull text or XL files, but nothing about pulling a compressed file. I wished to know if there is any process for the same. After pulling the file, it is to be saved to Application server after extracting. My doubts are as below:
1. How to pull a *.gz file via FTP (Need batch processing)
2. Can I extract and rename th file before saving it to applciation server? Or I need a temporary location to place the file before extraction?
Any inputs are appreciated.
Thanks,
Shishir.

Hi Sandra.
Thanks for the confirmation.
There is a change is the requirement. We need to Poll the FTP server for the file for the duration of one week every month.
When the file is found, we are to take the *.gz file, extract and put on the application server.
My question is how do we poll the application FTP server? I searched the forums and found a few threads that say that an FTP adapter is to be setup for polling the FTP server and then we can schedule it using u201CAvailability Time Planningu201D.
/people/shabarish.vijayakumar/blog/2006/11/26/adapter-scheduling--hail-sp-19-
I wished to know if that is the only way to approach this requirement.
Any help is appreciated.
Thanks and Regards,
Shishir.
Edited by: Shishir Kinkar on Apr 26, 2011 11:07 AM

Unable to view Multi-page Tif G4 Compressed files

Is any one aware of a product(free would be best); that will permit Mac (various operating system versions) desktops to view Tif image files?
Tif file format we are using, the viewer must be able to view:
G4 compression;
Multi-page tif,
Interestingly enough the Ipad's are able to view our compressed files without additional software, but the Preview application that comes on Mac's we have in house and employee's who have Mac's at home that tryingto use for work are not able to view our highly compressed images.
We have software for our PC systems that permit the viewing/editing of our images without problems. Unfortunately, the software is not compatible with Mac's.
No, their is no option to convert out TiF to a different compression, with our high volumn of scanning we need the high compression for our scanning of documents as is.
The only work around we have is for staff that are using Mac's in order for them to view documents at home, internal staff must take the time to convert the files to PDF format.

It's an HP P3005dn (duplex+network) printer. OS X simply recognized the printer on the network and set itself up accordingly (without the option of selecting PCL or Postscript). The Windows computers in the office, though, - ugh - it was ugly getting them set up. None of them would recognize the printer on the network, and couldn't even browse for it and find it. I wound up having to download Bonjour for windows, and set it up that way. I downloaded the drivers from HP.com, and believe I set them all up to print using PCL.
It sounds like PCL v. PostScript may be the issue; is it possible to print using PCL on Macs?

Advice for modifying a compressed file without expanding its size?

Hello. Fairly new to video editing, so your advice is appreciated.
I've got a 720x480 WMV3 .AVI video clip which runs about 1/2 hour at a rate of 666kbps. The file size is about 75MB.
In trying to adjust the brightness/contrast on the file and resave it, the file sizes for different formats all shoot way up. The file has a heavy amount of compression to start with. My thinking is that 'high-quality' settings within a codec will actually store too much information, while 'low-quality' settings will further compress the file and result in loss of quality.
Is there any rule of thumb to dealing with an already-compressed file, editing it, and resaving it (without a significant loss of quality) and without greatly increasing file size?
Thanks in advance,
John

John,
You are starting with a heavily-compressed file, the WMV, so original data has been lost.
When you output your Timeline, you will again need to apply heavy-compression, to keep the file size down, and also experiment with the Bit-Rate.
The only aspects, that will address file size, is Duration (pretty much already set), and Bit-Rate. The lower the Bit-Rate, the smaller the file, BUT at the expense of Quality. As you have already taken a hit on Quality, with the initial WMV compression, and you will loose even more Quality, when your re-compress, you need to study the output files, to make sure that they are still satisfactory for delivery.
If you can do the editing required in Windows Movie Maker, it might be a better program to use, as it is built around the WMV specs. Not sure if it has the Effects and control that you need, however.
Good luck,
Hunt

Compression File

Hi
How to compression file contain waveform in binary file.
I'm using zip tools put the file contain 61kbyte convert to 41kbyte, not good . I need another Technical .
Thanks

muks wrote:
I dont use text language all the time.To me conveying what we think is more important.
It's also important that the other person understands what u () say, and as has been noted previously, this forum is often frequented by people whose native language is not English, and would not know about such colloquialisms.
To poster: You will first need to indicate what's not good about the compression that you're already getting. For instance, what kind of compression are you trying to achieve? There are other compression schemes, and you can also vary the compression level with ZIP files, but you will not be able to do so with LabVIEW's ZIP functions. I'm not sure if the OpenG compression library allows you to set compression levels. You can always install a compression program on your computer (such as FilZip or 7-Zip) and simply call it using System Exec.
Message Edited by smercurio_fc on 08-24-2008 02:45 PM

Compressing files from CD

How do I compress files that I've saved to iTunes from CD? They are taking up lots of space on the iPod.

You need to convert them to a different format then update your iPod. Converting creates duplicate files in iTunes so you will either have to delete the larger ones or alternatively create a playlist specifically for the iPod that contains the compressed ones. If you go for a playlist, the simplest thing to do to manage the iPod would be to change the update setting to "automatically update selected playlists only" and select your list of compressed songs:
How to convert a song to a different format
For info:
The iPod offers three ways to transfer music from your computer. You can select one of the following update modes from the iPod Preferences menu in iTunes (Edit=>Preferences=>'iPod' tab):
1) Automatically update all songs and playlists. This is the default mode, in which your entire music library, including playlists, is automatically synced to your iPod. If the music library on your computer exceeds the iPod storage capacity, you are prompted to select a different update method.
2) Automatically update selected playlists only. With this option, iTunes automatically copies the playlists you have selected to the iPod when you connect it to the computer.
3) Manually manage songs and playlists. You can also choose to transfer music to the iPod manually. This allows you to drag and drop individual songs and playlists from iTunes to the iPod.

After Compressing file with Compressor when somthing move in the picture

After Compressing file with Compressor when somthing move in the picture , it will get a kinda interlaced in the edges of it , the orginal files was Uncompressed DV and I add subtitle on it and then used the 90 min best dvd preset for it .
I really need some help .
thanks a lot .

I would take a step back here before going further. William's suggestion might very well clean up the library but something obviously did not go right and to start mucking about in the library might make things worst.
For starters I'm surprised to see the folder structure you showed in your first post. Aperture stores managed masters (originals) by import date and time. The structure (in all libraries I've ever seen) looks like:
So something seems wrong with your master folder.
Also the three folders you showed the first and third are identical ( the middle one has the (1) added to which is how the OS handles duplicates in a folder) so this shouldn't even be possible, those folders should not be there.
I'm wondering if this is something left over from your using Duplicate Annihlator. Do you have a copy of the library before you ran the merge and used DA on it? Would be interested to see what the master folder looks like.
Finally when you ran the merge which library did you tell Aperture to use as the master, the one that was used to resolve conflicts?
Again William's suggestion might be all you need to do but it would be good to figure out want went wrong before proceeding.
regards
Message was edited by: Frank Caggiano - A better first step might be to run the Aperture first aid tools, repairing and possibly rebuilding the library.

Problem in Compresses file.Not able to see the data in file

Hi All,
I am downloading file into application server.
Using:
OPEN DATASET file FOR OUTPUT FILTER 'compress'.
OR
DATA: l_command(100) type c.
   CONCATENATE 'compress ' p_file INTO lw_command SEPARATED BY space.
    ENDIF.
    CALL 'SYSTEM' ID 'COMMAND' FIELD lw_command.
When I see the file content it contains junk characters.
If I want to see the data Do I need to uncompress the file.
con't we see the data without uncompressing the file?.
Regards,
vinod

Hi,
Uncompress is required to read the content of an Compressed file.
OPEN DATASET DSN FOR OUTPUT FILTER 'compress'.
OPEN DATASET DSN FOR INPUT FILTER 'uncompress'.
The first OPEN statement opens the file so that the displayed data can be read into it in compressed form.
The second OPEN statement opens the file so that the data is decompressed when it is read from the file.
http://www.sapnet.ru/abap_docu/ABAPOPEN_DATASET.htm#&ABAP_ADDITION_8@14@

Using Aperture 3.51 I am having frequent crashes and freez ups when editing Canon raw files?

HI,
I have an IMac with 4 G of Ram and am using Apeture 3.51. When trying to edit CS2 raw files I experience frequent crashes and freez ups of the whole computer. Any suggestions?

You didn't mention any color calibration being done on your monitor. This is an essential part of any color-correct workflow. What are you using to calibrate your monitor (and your printer)?
Print profiles (for soft-proofing as well as printing) are for specific combinations of paper & printer. The nine you have are each, most likely, for a common paper (perhaps mfr'd by Canon) to be used with your printer.
I don't know what you mean when you say "I choose a high standard print option".
Have you read the User Manual chapter on printing?
Printing Your Images
There is also a good appendix on calibration:
Calibrating Your Aperture System

How can I edit an html file in Firefox using View Source?

I have created an html webpage and saved it to my pc. I can't edit the html file in firefox when I right click on the page and select "View Source". I can view the code but I can't edit it. I can do this in IE9.
I thought I was able to do this before in Firefox.
Did my settings change somewhere that I can no longer do this?
Do I have to have something checked in the Web Developer extensions for it to work?
I'm using Firefox 24.0
Thank you for any help with this. :)

The View Source window in Firefox cannot be used to change computer codes. Nor can the Web Developer tools.
Sorry for any inconvenience.
I suggest using Programmer's Notepad.

Problems with compressing files with right hand click. it does not work.

Problems with compressing files with right hand click.
I am using the compress function in the Mac OS (File > Compress XX) from time to time. Today it does not work anymore. OS 10.5.6
I get a message: The content list cannot be created for compressing.
I tried it with files and folders and keep getting this message. Anybody any idea as to how to fix this

Thanks I love my macbook!!!!
I also got further problems such as copy-paste not working etc.
so I fixed it just this morning by running Applejack 1.5 and am back up running noticing your post.
thanks for helping though!

Is editing HD (.mts files) on a laptop possible?

Hi folks,
I have recently purchased a CANON Vixia HF20 camcorder with an internal harddrive that outputs ".mts" files.
I own a DELL Inspiron 1525.
My processor is an: Intel(R) Pentium(R) Dual CPU T3400 @2.16GHz 2.17GHz
Memory (RAM): 3.00Gb
System type: 32-bit operating system
Windows Vista Home Premium
I've used Adobe Premiere Pro in the past (non-HD files not on this computer) and enjoy it thouroughly.
I was hoping to use it again, but the specifications seem to suggest my processor speed is too slow.
I'm looking for some advice:
1) Will CS4 operate on this computer? And if so, would I be able to edit the .mts files?
2) Is there anything I can do to this laptop (upgrades/hardware purchases) that I can do that would enable me to edit these files?
3) If this isn't going to work, do you know of other editing software that I could use to edit .mts files on this computer? (I'm reluctant to purchase a desktop after recently buying this computer).
Your insights would be most appreciated. My thanks in advance.
Kind regards,
Kyle

Hi Bill,
Thanks so much for your great suggestions. I am a bit confused about your hard drive suggestion: Is "A 3x I/O w/ SATA connections and 7200 RPM speed" an internal or external drive? I bought the laptop with an eSATA external drive connection. If I hook up an external 7200 rpm eSATA hdd, could I expect better performance? Should I copy the avchd files to it for editing? Where would you write the preview and other temp files, and does it matter? do I have control over that? Other page and virtual memory assignments?
Finally, if I pre-process the AVCHD files through Adobe Media Encoder and convert them to some other HD format first, will I have better luck editing? Which formats -- of those available in Premiere/Encoder -- would you recommend? I know transcoding is an extra step, but that might be the price of remote editing with the laptop.
Thanks again,
Lance

Editing a compressed file

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