Add support for screenrecord about madb HOT 5 OPEN

That would be so insane.

I only test it a bit my self (simply use SendAdbRequest to get the data and output it to the Console). But i never worked before with VideoStreams. So i'm at point i dont how how to capture a "Frame" out of the stream.

The hole part could be even more complicated if we use H264. Because i think we would need a decoder.

I search for a projekt that simply accept a H264-Stream and do the work for us^^. But i dont find one :'(

from madb.

Yeah, H.264 is not something we do every day as.NET developers :)

You can have a look at (amongst others):

• FFmpeg
• Accord
• streamcoders.com

They tend to come with specific licenses so you may want to watch out for that.

You could, at first, try these things separately:

• Can you invoke screenrecord via SendAdbRequest and save the output to a file
• Is the file valid (e.g. can you open it with something like VLC)
• Can you use any of the H.264 decoders to extract the individual frames

And if that works, you could try to do it real time (although I’m not sure what the CPU overhead of that would be, though).

Let me know if you make any progress on this. I may have some time to look into this, but that will be a couple of sprints from now.

From: Viper2k4 [mailto:[email protected]]
Sent: Thursday, June 30, 2016 4:44 PM
To: quamotion/madb [email protected]
Cc: Frederik Carlier [email protected]; Author [email protected]
Subject: Re: [quamotion/madb] Add support for screenrecord (#55)

That would be insane.

I only test it a bit by my self (simply use SendAdbRequest to get the data and out put it to the Console). But i never worked before with VideoStreams. So i'm at point i dont how how to capture a "Frame" out of the stream.

The hole part could be even more complicated if we use H264. Because i think we would need a decoder.

I search for a projekt that simply accept a H264-Stream and do the work for us^^. But i dont finde one :'(

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from madb.

Cant get a valid video.

Saving to file is no problem (the file it self is not playable with VLC or so). FFmpeg can demuxe it but with many fragments. I try differnt options but every time the same result.

I god many error while decoding:

"P slice to large", "out if range intra chroma", "negative number of zero coeff" and so on.

The only valid file i got is if the screen is off and there are no frames^^

from madb.

I found the reason why the file is corrupted, if you send the screenrecorder output to stdout. Here you have the same issue only for screencap https://stackoverflow.com/questions/13578416/read-binary-stdout-data-from-adb-shell

I tested this with my windows10 pc and android phone.

adb shell screenrecord --output-format=h264 - > E:\ffmpeg\bin\testfile.h264

Afterwards i opened my testfile.h264 with a hexeditor and replaced the values 0d 0a with 0a.

from madb.

what about this -> https://github.com/secile/OpenH264Lib.NET

from madb.