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Videos Saved In Cache?

  • Hi. I just watched a video on Facebook which had audio. Just after I'd watched it, the page owner removed the video (himself, not via Facebook policy).

    I'm not bothered about the video, but I'd quite like to save the audio which I can easily extract from the video, so...........

    Is this video saved on my PC somewhere, like in Opera cache? If so, what would the file be called since when I look, all I'm seeing are a list of files such as 'f_00c7b1' nd so on.

    Any ideas, or isn't it here?

    TIA.

  • @popinjay01 You can try using Chrome Cache Viewer to look at Opera's cache and see if you find the video.

  • That was great, it works in Opera and I could see all the video files icons there except that when you select all and copy them, you can't paste them into a new folder. That would have been ideal because i could have enlarged the icons to see a thumbnail so I knew which video I was looking for.

    So, there are video icons there, they don't copy and they don't play in any media players that I have.

    Any other ideas?

  • If the video is an actual Facebook video and not one embedded from another site, the video is going to be streamed to Opera via blobs/chunks. Each one of these blobs/chunks will be stored separate in the cache (which you can see in the cache viewer). Each one will be an mp4 fragment with a moof header and data. You'd have to gather all of the files for the mp4 and find something that can put them back together so you can yank the audio out.

    The URL for each chunk will be the URL to the mp4 on the server with a timestamp and byte range etc. It'll also include some type of session id. If the video is still on the Facebook server and have a fresh session id for it, and you adjust the byte range in the URL, you might be able to download the whole mp4 at once. If you don't have things right though, the server will deny you.

    I'd look up on how to do all this for Chrome and it should work for Opera. People have probably already done it.

  • The thing with the Chrome Cache Viewer is that in Opera, it lets you see all the file types, but you can't do anything with them. For instance, you can select them all, then select copy (to move them to a separate folder for examination), but you can't paste them, delete them or do anything with them. Chrome Cache Viewer does exactly what it says on the tin, it lets you see what files are there and that's all.

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