Ask HN: Is there a site providing example files for “all” media types?

I've used this site for videos of different sizes/filetypes before: http://www.sample-videos.com/

http://www.h264info.com/clips.html

I've used it before when I built a system that processed video files.

https://samples.ffmpeg.org/

Not nearly complete, of course. I can't find a set of test images from the imagemagick project.

This would be a awesome github project; it wouldn't even need an associated web page. You'd be amazed at all the different varieties of "legal" JPEG images, for example.

In my own side projects, I'm often dealing with old, badly-documented formats with limited examples (like data files for games). I usually start with the "file" command to try to identify the filetype, then look on Wikipedia and filext.com to find links to format specifications. Usually, I can also find the name of any programs that create/edit/view that file type, and that's a jumping-off point to find examples (given the domain, it'll be anything from another game that uses the format to a 90s-era fan page with modified or fan-created data files).

I've used this site before too: https://wiki.multimedia.cx/index.php?title=Main_Page

It provides links to a lot of format specifications, codec information, sometimes the mplayer samples that other comments here have linked to, etc.

On the same site, http://fileformats.archiveteam.org/wiki/Encyclopedia_of_Grap... points to an archive.org copy of a CD ROM with sample images.

Via its BMP page, I found http://entropymine.com/jason/bmpsuite/, which looks like the definite resource on that format.

It is basically the "Big Buck Bunny" video in many sizes, durations and formats.

https://github.com/nbeaver/mimetype-menagerie

It organizes files by mimetype. It's not complete, but it might be a good starting point.

You can also look at the testcase folder for afl-fuzz, which includes archives, images, and even an H264 compressed video:

https://github.com/arisada/afl-fuzz/tree/master/testcases

For large sets of some common media types take a look at the govdocs1 corpus: http://digitalcorpora.org/corp/files/govdocs1/by_type/

For an odd example, sometimes a google search will turn something up.: https://www.google.com/?q=filetype:xlsx

Here was my stab at that problem. Somewhere near 70 files, many are variants on text files/code files iirc but a lot of data centric files as well. There is a small neglected WordPress site linked to it.