DEF CON 17 Audio and Video now available!

[YenTheFirst]

Re: DEF CON 17 Audio and Video now available!

Even this far out from the initial launching of the archives, I still have trouble downloading the files. Most attempts are met with a TCP RST - I don't even get any HTTP response.

edit: also, this RST is about 600 seconds removed from the original SYN
edit2: manually bumping up the number of TCP SYN retries got it to download.

[TheCotMan]

Re: DEF CON 17 Audio and Video now available!

TheCotMan: I had already set the extension to run one download at a time.

Thanks for the feedback. Do you know if it issues a collection of HTTP "HEAD" requests all-at-once for each of items to download before serializing through the downloads one at a time? (Some download applications use HEAD to verify a network resource/file is available (with no date change for cache-check, or checksum change) before queuing up the item for a "GET".)

[fogus]

Re: DEF CON 17 Audio and Video now available!

TheCotMan: I had already set the extension to run one download at a time.

[TheCotMan]

Re: DEF CON 17 Audio and Video now available!

If that extension tries to connect for a download with a new session for each one, and runs each download at the same time, you probably are tripping one of the rules in the firewall. Either serialize your requests to request download and download one at a time, or experiment to find out how many connections are "too many connections."

(This was a problem before with users of various http proxies, which created a new session for each image, or included item from a web page. Normal web browsing, and browsing with modern proxies didn't seem to trigger the same response.)

DT would have more info on this, if this is the cause.

[fogus]

Re: DEF CON 17 Audio and Video now available!

The large files tend to give me "server error" messages inside the "DownThemAll!" Firefox extension. For example, https://media.defcon.org/dc-17/video...-%20Slides.m4v will not download (there is a 12 second (or so) timeout period in DownThemAll!). Smaller files (such as PDFs) seem to work. Any suggestions or similar experiences?

[Dark Tangent]

Re: DEF CON 17 Audio and Video now available!

I just downloaded a video from Defcon 17, and it is good to see them online. One suggestion for next year:

Could you de-interlace them before encoding them?

It will look better where motion is concerned on playback, and it will probably compress better. Thanks!

That will be a good experiment. I'll make sure to try it.

[TheCotMan]

Re: DEF CON 17 Audio and Video now available!

I just downloaded a video from Defcon 17, and it is good to see them online. One suggestion for next year:

Could you de-interlace them before encoding them?

It will look better where motion is concerned on playback, and it will probably compress better. Thanks!

[Nikita]

Re: DEF CON 17 Audio and Video now available!

Are .m4v video files being recoded to .rm files which cannot be downloaded? I am finding many older video files cannot be downloaded because they are in rm format and can only be viewed.

No, RM is being converted to m4v or m4b. The files you find in .rm have not been converted yet or the change hasn't been posted yet. Were working on it.

[number006]

Re: DEF CON 17 Audio and Video now available!

Are .m4v video files being recoded to .rm files which cannot be downloaded? I am finding many older video files cannot be downloaded because they are in rm format and can only be viewed.

[Dark Tangent]

Re: DEF CON 17 Audio and Video now available!

DT, can you post or PM me a changelog of the new URLs so we (I) don't have to dig through the RSS feeds to get them again?

NOTE: All older .mp4 video files have been renamed to .m4v to better reflect what they really are.

I think if you click on the busted links you posted, they should work now, just as .m4v.

We're in the middle of getting all the past content re-linked and fixed, so soon Neil will be posting specific archive pages per con with all working links for all the content we can find. Woot!

[CP99]

Re: DEF CON 17 Audio and Video now available!

DT, can you post or PM me a changelog of the new URLs so we (I) don't have to dig through the RSS feeds to get them again?

[Dark Tangent]

Re: DEF CON 17 Audio and Video now available!

DT, I have completed a local copy of all the video content and have found 404s for the following URLs.

https://media.defcon.org/dc-13/video...nicornscan.mp4
https://media.defcon.org/dc-13/video...n_Dark_P2P.mp4
https://media.defcon.org/dc-13/video...el_rootkit.mp4
https://media.defcon.org/dc-13/video...kstation_2.mp4
https://media.defcon.org/dc-13/video...Threat_Dev.mp4
https://media.defcon.org/dc-13/video..._Detection.mp4
https://media.defcon.org/dc-13/video...dow_Walker.mp4
https://media.defcon.org/dc-13/video...vivability.mp4
https://media.defcon.org/dc-13/video...t_Analysis.mp4
https://media.defcon.org/dc-13/video...rofit_Tech.mp4
https://media.defcon.org/dc-13/video...Hyperspace.mp4
https://media.defcon.org/dc-14/viDef...Weaknesses.mp4
https://media.defcon.org/dc-15/video...n_rule_all.mp4
https://media.defcon.org/dc-15/video..._Debugging.mp4

Once these are fixed the entire repository should be 404 free.

CP99, that is terrific. We'll start on fixing 'em.

[CP99]

Re: DEF CON 17 Audio and Video now available!

Any info you guys have might help..

DT, I have completed a local copy of all the video content and have found 404s for the following URLs.

https://media.defcon.org/dc-13/video...nicornscan.mp4
https://media.defcon.org/dc-13/video...n_Dark_P2P.mp4
https://media.defcon.org/dc-13/video...el_rootkit.mp4
https://media.defcon.org/dc-13/video...kstation_2.mp4
https://media.defcon.org/dc-13/video...Threat_Dev.mp4
https://media.defcon.org/dc-13/video..._Detection.mp4
https://media.defcon.org/dc-13/video...dow_Walker.mp4
https://media.defcon.org/dc-13/video...vivability.mp4
https://media.defcon.org/dc-13/video...t_Analysis.mp4
https://media.defcon.org/dc-13/video...rofit_Tech.mp4
https://media.defcon.org/dc-13/video...Hyperspace.mp4
https://media.defcon.org/dc-14/viDef...Weaknesses.mp4
https://media.defcon.org/dc-15/video...n_rule_all.mp4
https://media.defcon.org/dc-15/video..._Debugging.mp4

Once these are fixed the entire repository should be 404 free.

[Dark Tangent]

Re: DEF CON 17 Audio and Video now available!

I have noticed this too, I figure its due to the amount of traffic thats being pumped out/ https://twitter.com/thedarktangent/status/5751791329



I have been using wget to download all the videos into a local raided repository. Progress bar and ETC works fine.

Good to know these things. It seems like the files are getting completed (Watching the server logs) so I'm not sure how to troubleshoot it. Any info you guys have might help.

Also let me know what you find on the Gnutella 1 / 2 / eDonky2k networks. Searching for DEFCON 17 should get you results.

[CP99]

Re: DEF CON 17 Audio and Video now available!

but all downloads seem to either fail or break in the middle.

I have noticed this too, I figure its due to the amount of traffic thats being pumped out/ https://twitter.com/thedarktangent/status/5751791329

strangely, the downloads do not display a status of completion (how many megs remain, etc)

I have been using wget to download all the videos into a local raided repository. Progress bar and ETC works fine.