Questions tagged [file-format]

A file format is a particular way that information is encoded for storage in a computer file.

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53 views

What file format to use for photos? I will edit them. Then I will add text and make a PDF

I want to shoot a few photos using the smartphone. I will receive JPEG files. Next step I will move this photos to desktop computer (Windows 10 Home 64-bit). Now I want to edit this photos: some of ...
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48 views

Should files with the “hdr” file extension end with newline characters?

I'm writing a script that enforces file formatting. One of the things it does is ensures that all text files end with newline characters. One area which I'm unsure of is with .hdr files. These are ...
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Reading/exporting WhereIsIt catalogs on Linux

I have some media catalog files (.ctf) created using WhereIsIt (probably version 3.83.405), on Windows. I am running Linux, and need to now read, and hopefully export/convert, those catalogs. How can ...
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38 views

Deal with reserved characters when syncing volumes with different formatting

I have a NAS and I want to copy some directories on it to an exfat formatted external HDD. Problem is paths / filenames may contain reserved characters for exfat (see https://en.wikipedia.org/wiki/...
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47 views

Identifying and decoding apparent proprietary email storage format (possibly AOL)

I have many email messages, one per file, which appear to be in some kind of proprietary format. I have reason to believe that it is some kind of AOL format, but I don't have any copies of AOL to test ...
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15 views

Must every XML file/stream/etc begin with either a “<” character, or with a BOM followed by a “<” character?

I'm doing some filetype detection stuff and wanted to handle XML detection more robustly. I added support for an optional initial Unicode BOM (Byte Order Mark) followed by a < character in either ...
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1answer
188 views

What is the unit of Margin in Advanced SubStation Alpha (ASS) subtitles file format?

I can't find a good documentation for the Advanced SubStation Alpha (ASS) subtitles file format on internet and I am wondering, what is the unit of margin? My intuition tells me it's a percentage but ...
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126 views

Office 2003 can't open newer Office files

I installed the Office Compatibility Pack for Office 2003 so that I would be able to open, edit, and save newer Office files. I even installed up through Service Pack 3. However, it doesn't seem to ...
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88 views

What is the sturcture of RW2 file?

Can any one tell me that the Panasonic's RW2(RAW Format) is based on TIFF or not ? The header is same as of old format (RAW).
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Why different hex editors show different binary for a file?

When I open a binary(in this case it is C:\\Windows\\System32\\notepad.exe), different hex editors show different result each other, for the one same file. I tested it on starting point of section ...
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Are all PDF readers compatible with PDF/A

I was exploring the setting for my printer/scanner, and there is an option to make all scans PDF/A Compliant. Having never heard of this, I looked it up. I understand that PDF/A is a method of ...
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Is there a standard for this file format?

I run an Ubiquity Edge router which itself is based upon Vyatta (it does not matter, it is just in case someone knew the product). The configuration file looks like that (...) service { dhcp-...
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416 views

Does any picture file format embed author, title etc.?

Does any picture file format embed author, title etc.? I'm currently playing with ffmpeg and such info ships with a video file and I thought it useful. I was wondering if an image file can also ...
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269 views

Why are MS Office files actually ZIP files with another extension? [closed]

I has been trying to reverse-engineer the Microsoft Office file formats and I've found they are actually Open XML and the "Open XML" file format is actually a ZIP format. When I open the Office files ...
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“MP4” files unreadable in TV/Video players but readable in my PC and phone

I download series(.mp4 files) with my phone and copy them into the USB flash memory using OTG adapter and see them in the TV or the video player. But this week I downloaded 3 files as always but got ...
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How do I open a file with the file extension “FILE?”

From time to time someone sends a file that comes in the extension of .FILE. How do I change this or open this? I think they might be using Microsoft Word or something like at the office. I don't ...
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File Format - How to open this extension

I received several images with the .irt file extension that I am unable to open. I am not familiar with this file format. How can I open them?
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Why can't I send a large file to a FAT32 formatted USB Drive? [duplicate]

Why can't my USB drive accept a large file, as in bigger than 3.50 gb, when it is formatted in FAT32? My drive is a (16 gb) drive, but when I tried to send an ISO file to it while it was formatted in ...
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123 views

Why do tabs in YAML work some but not at all times?

We've used tab-characters in some of YAML-files here: host: "foo" port: 8011 p: "bar" For some reason, the same version of Ansible running the same playbook works just fine with these files ...
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573 views

How can I create a .prn file from a TIFF?

I have an industrial printer that requires .prn files to print. I'd like to automate generation of these files using software I write. We start with TIFF files, and then we use special software from ...
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2k views

Is ISO 32000-2:2017 (PDF 2.0) really a non-open and non-Free format? [closed]

Is it open? According to Wikipedia, PDF is an open format. But the ISO charges 198 Swiss francs for you to download the PDF 2.0 specification. Now according to free_file_format (first ref in the ...
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119 views

Why binary files like this snippet of a PNG has all this whitespace in it

Here is a snippet of the first part of a PNG file viewed just by opening it up in Sublime Text and viewing the hex code directly. 8950 4e47 0d0a 1a0a 0000 000d 4948 4452 0000 02e7 0000 0155 0806 0000 ...
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108 views

How to compress a bunch of files efficiently?

Let's say you have a lot of files to archive. They are in several different file formats (txt, docx, pdf, png, jpg, mp3, zip, etc.). What are the best practices to compress them all, so that they ...
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418 views

How do I open a *.app file in linux terminal?

I am trying to run the xeoma app provided as xeoma.app in Linux via terminal so I can run some switches but Linux keeps telling me xeoma.app: command not found. The general term "app" is flooding my ...
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How to tell if an internet video is flash or html5 (or something else if there is such thing)?

I have some problems with Opera and Chromium browsers playing some streams and I want to debug that. But I cannot tell what works and what does not because I cannot tell what format a given stream is ...
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How do I convert from .mp4 to .part? [duplicate]

I have a partially downloaded video file (the download was paused). It is a large file and a significant portion has already been downloaded. I accidentally renamed it to .mp4 and its format got ...
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7k views

Which file format starts with “45 52 02” bytes?

I've got .cdr file format (not CorelDRAW file), however I've trouble opening/burning it. I expect it to be the disk image. Here are the first few lines: $ hexdump -C *.cdr | head 00000000 45 52 02 ...
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12k views

What does Matroska have which WebM doesn't, that made the differentiation necessary?

I've read that WebM is essentially a subset of the Matroska format. What does Matroska support that WebM doesn't, which necessitated "christening" a new format rather than just saying "WebM = Matroska ...
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33 views

How to save JPEGs for MAC OSX?

I am pretty sure that's a simple question, but I am not acquainted with MAC and its files formats at all, so: How to make a copy of exported JPEGs from Photoshop for MAC users or is there relevant ...
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4k views

LibreOffice: How to save in Git friendly format?

LibreOffice saves into files that are zip files. Zip files are generally suboptimal to use with Git: A small change in the document can change most of the zip-file, thus making it impossible for Git ...
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1k views

What Format is this File (starting with “!R! SEM 9;EXIT;”) and how to display it onscreen

I have the following file found on a customer system and i need to figure out what format it is and (if possible) how to open it in Windows (Win7 or upwards would be perfectly fine). It sould be ...
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5k views

Is it ok to rename webm (audio-only) files to .opus?

For .webm files obtained with youtube-dl-f bestaudio containing no video stream, is it preferable to run ffmpeg -i input.webm -vn -c:a copy output.opus or can one simply rename the source file, ...
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842 views

Binary encoding formats

echo random text > text_file Saves text_file in text format with ASCII encoding. To check the encoding, I do chardetect text_file which tells me that the file is ASCII encoded. Now I have a jpg ...
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330 views

What font format is this?

An E Ink display I bought supports displaying text using a built-in command. According to the documentation, it also allows me to load a different "font library" for Chinese characters: Font ...
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1answer
368 views

How can I read very old iChat transcripts?

Sometime in 2005, Apple's iChat switched to writing its logs as binary plists. But before that, it was another format that I don't know how to read. > file some-early-2005-log.chat some-early-2005-...
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101 views

Opening Office 2013 files in Office 2010

I have Office 2010 and I need to look at an Excel 2013 file.  How do I do this?  Excel 2010 tells me it is a corrupt file and cannot open it.  Is there a technique that will allow me to view newer ...
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1answer
473 views

How does Audible's .aa file format work?

When I download an audiobook from Audible, I get a bookname.aa file. When I open it with iTunes, iTunes shows me an authentication prompt where I need to enter my audible credentials. I presume the ...
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158 views

What is the file-format of an email message that is stored in on Apache server?

I have made a backup of my Windows LiveMail messages directly from the server (Apache / Linux). The files have strange long names and I can open them in a text editor although the result is not very ...
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2answers
817 views

GIMP 2.8.16 unable to open ORA files

I'm trying to edit/combine paintings I did in Krita with GIMP. Because GIMP can't open .kra files I saved them as .ora files. However, GIMP is unable to open any .ora files, including ones I made ...
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24 views

How do I fix this file that has become partially hex?

I had a Java file that was part of a project; it went missing after running fsck. I later found it in /lost+found but now it seems to be part-hex and part-text: How can I restore this to normal text? ...
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7k views

Inspect serialized file content

I have a file which apparently contains serialized structures. The first 26 bytes contain the string "java.util.HashMap", so I am sure that this file holds serialized data. Is there is nice tool ...
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636 views

Is there a spreadsheet version of .rtf?

For a text document, there's multiple format options: .doc, .docx, .odt, .rtf, etc. I use .rtf for all text documents, because its compatible with nearly everything. My question is, is there a ...
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1answer
272 views

Windows recognzie file format as a zip archive

Windows Explorer will automatically open .zip archives as a file folder. I'm making a custom file format for some data analysis that is nothing more than a zip archive of text files. However, I want ...
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1answer
5k views

Convert powerpoint to markdown

Can I convert powerpoint to markdown? My ultimate goal is to create an easily versionable version of the powerpoint. (Maybe reveal.js or something)
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2answers
795 views

Can PDF Annotations Be Exported and Then Imported Back?

I have a few hundred pages of highly annotated PDF file, which is mostly text, in the form of underlines, highlights, and (more) text annotations. After two years, a updated version of that document ...
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239 views

Sngrep Unknown File Format Error

I am attempting to use the sngrep utility on a Mac OSX El Capitan 10.11.4 and getting an error when I try to open any pcap file. The error is as follows: Johns-MacBook-Pro:Downloads gojira$ sngrep -...
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open a text file such as xml or markdown as plain text without interpreting the formatinstruction in MS-Word

Is there a key combination or 'open as...' plain text menu option that can be used? Subsidiary double question: will it also work with anz file (with random byte contatint) AND what are the ...
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527 views

File-based loop device with writing support and dynamic size

Usually loop device (v-node disk) is based on a file with pre-allocated size (e.g. an image of a floppy drive or ISO disk). The device is then treated as a block device and can be formatted with any ...
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2answers
1k views

Saving Skype voicemail messages on a Mac

I would like to save two voicemail messages that I received today through Skype. I would like to do this quickly and get the source file if possible, or at least get the source file to open in an ...
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2answers
249 views

Do lossless audio files keep original quality when played (or only when converted back)?

I see a "lossless format" like FLAC defined often as one in which there is no loss of quality compared to the source file from which it was converted. But does that mean that the original quality is (...

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