Re: [YouTube-API] Sniffing YouTube-API controls (with wireshark)

Hi Dave,

I wouldn't expect any kind of official response as this is probably
internal information.

However I believe that YouTube uses the underlying flash video
components - so I would start by writing a simple flash video player
yourself and then analysing how flash player returns the data.

HTML5 playback will be different and varies wildly depending on
browser / platform / plugins available.

Tim Wintle

On Wed, 2011-09-21 at 06:17 -0700, dave wrote:
> Hi @all,
>
> I am currently working on my bachelor thesis: I want to analyze the
> packet stream of YouTube-Videos with wireshark. I can see the various
> requests on the beginning and I can also follow the TCP stream of the
> video, containing the video-header (encoded in AMF), but now I'm
> stuck:
>
> I want to identify the packets, where the user sends a feedback to
> YouTube - that means, e.g., playing Pause/Start. I also want to
> identify the packets, where YouTube itself realizes it's gonna stall
> the video. So the problem is, to find that information in the packet
> stream without using the YouTube-API itself!
>
> I've tried to spot the packets, but I am not sure about the results.
> It seems like there are only some HTTP answers from YouTube with
> status 204 No Content - but I don't know if that's a respond to
> pressing Pause.. Can anyone help me?
>
> (I do know that YouTube will open a new TCP connection if the user
> jumps to a part of the video which hasn't streamed yet.)
>
> At least I guess I've found the packet, where I pressed play again
> (because that should be the packets where a new GET request gets
> sent?):
>
> GET: Request URI [truncated]: /s?
> sd=B4A7DDA24HH1316609848492094&nsivbblmax=184767.000&plid=AAStcx412R5h-
> naI&hcbd=1175016&nsivbblc=59&hcbt=1.7&bd=3863120&h=360&sourceid=y&nsiabblc=59&bt=8.512&sdetail=f
> %3Atopvideos_music%2Cp%3A%2F&cfps=23.9234449
>
> Best regards,
> Dave
>

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