Understanding manifest ( F4M )

Hi,
I want to be clear, i don't want any software-script or whatever for download a video, i want to learn how this can be done manually

The first thing i want to know is how many fragments is the video. I think the part has this information are "metadata" and "bootstrapInfo" ? The manifest don't have more, except <id> with the basic link.

Based on bitrate, this is the most high resolution:

Code:

<media bitrate="5104" url="1_39ca2412ac6bdfe0_" bootstrapInfoId="bootstrap_1">

<metadata>

AgAKb25NZXRhRGF0YQgAAAAMAAhkdXJhdGlvbgBApLjqfvnbIwAFd2lkdGgAQJ4AAAAAAAAABmhlaWdodABAkOAAAAAAAAANdmlkZW9kYXRhcmF0ZQBAs3EXpIipCwAJZnJhbWVyYXRlAEA4//Thrcu1AAx2aWRlb2NvZGVjaWQAQBwAAAAAAAAADWF1ZGlvZGF0YXJhdGUAQF/pLJd6KQQAD2F1ZGlvc2FtcGxlcmF0ZQBA53AAAAAAAAAPYXVkaW9zYW1wbGVzaXplAEAwAAAAAAAAAAZzdGVyZW8BAQAMYXVkaW9jb2RlY2lkAEAkAAAAAAAAAAhmaWxlc2l6ZQBB2Thr4MAAAAAACQ==

</metadata>

</media>

For what i have read this is encoded with Base64, if i'll try to decode that string ( using CP1256 ) i have this:

Code:

onMetaDataduration@¤¸?~?غ#width@*height@گ?

videodatarate@?q¤?©        framerate@8ےôل*ثµvideocodecid@

audiodatarate@_é,—z)audiosamplerate@çpaudiosamplesize@0stereoaudiocodecid@$filesizeAظ8k?ہ

Some information! But i don't see any "numbers", anyway nothing about how many fragments to download. That metadata is related to "bootstrap_1"

Code:

<bootstrapInfo profile="named" id="bootstrap_1">

AAAAi2Fic3QAAAAAAAAAAQAAAAPoAAAAAAAoeSoAAAAAAAAAAAAAAAAAAQAAABlhc3J0AAAAAAAAAAABAAAAAQAAAboBAAAARmFmcnQAAAAAAAAD6AAAAAADAAAAAQAAAAAAAAAAAAAXcAAAAboAAAAAAChf8AAAGToAAAAAAAAAAAAAAAAAAAAAAA==

</bootstrapInfo>

Base64:

Code:

‹abst?(y*asrt؛Fafrt?p؛(_ً:

Again, nothing useful

And here i'm stopped, waiting for help from someone knows something about this manifest
Thanks for help

Understanding manifest ( F4M )

Re: Understanding manifest ( F4M )

Re: Understanding manifest ( F4M )