Support has ended, due to the possibility of pixel formats changing from each recovery update you receive.
But I did make a better Recovery Screenshot that handles this problem, and it can be found here or below.
This is a tool to get screenshots from Recovery or the Aroma Installer!
It's no big secret in the XDA community that you can use ffmpeg to convert your framebuffer to an image on some devices. I've found the ffmpeg values for the Nexus 7 2013, and made a batch script that lets you save as many screenshots as you would like in recovery or the aroma installer. This should work on all versions of Windows. I have only tested in Windows 7 and running the modified TWRP for multirom, which is based off of TWRP 188.8.131.52. It should work with regular TWRP as well as other recoveries. Please let me know if it works or not and what set up you have!!!
Why would anyone use this or do this?
Most people have actually no use for it whatsoever. It's pretty much useful for tutorials, showing anomalies, and showing off custom recovery themes. I needed to do it one time to show what I thought was an error in my recovery, but hadn't seen anyone post how to do it on the Nexus 7 2013, or any 1200x1920 device for that matter. While searching how to do this I came across this thread by @Whiskey103 I learned a lot of useful information.
You have to have the adb drivers installed before you can do anything. Go here for more information.
This rar file contains the programs adb and ffmpeg. This ffmpeg is the newest 32-bit version from their downloads page. You must have adb.exe, ffmpeg.exe, and the two dll files for adb in the same directory as this batch when you run it. The easiest thing to do is just extract the rar to a new directory, then run the file named RUNrs.bat. The screenshots will be saved in the same folder you unzip everything as 'timestamp'.png.
Download Recovery Screenshot.rar
To see whats in the batch script hit the show more content button below. I don't recommend viewing it if you've ever used the phrase "cat your buffer" before
@ECHO OFF CLS TITLE Recovery Screenshot MODE CON:COLS=54 LINES=40 COLOR 0B SET TS=0 set "ffshowb=-hide_banner" set "ffdebug=-loglevel fatal" if "%~1"=="-d" ( REM @ECHO ON set "ffdebug=-loglevel debug" set "ffshowb=%" MODE CON:COLS=140 LINES=250 COLOR 07 ECHO __________________________________________________________________ ECHO DEBUG INFO ECHO __________________________________________________________________ ) :START ECHO[ ECHO ______________________________________________________ ECHO This will pull a screenshot from your Nexus 7 2013 ECHO and save it to the directory that you ran this bat ECHO file in. Connect USB ^& reboot into your recovery. ECHO ______________________________________________________ ECHO Thanks to Whiskey103 for the idea!! ECHO Written by makers_mark ECHO ______________________________________________________ IF NOT EXIST ffmpeg.exe GOTO NOFILES IF NOT EXIST adb.exe GOTO NOFILES ADB kill-server -d >nul 2>&1 IF %TS%=="NOGOOD" GOTO SKIPPEDthatPause ECHO Press any key when you are ready. PAUSE >nul :SKIPPEDthatPause ECHO[ ECHO Pulling framebuffer from /dev/graphics/fb0 adb pull /dev/graphics/fb0 frmbfr >nul IF ERRORLEVEL 1 (cls SET TS="NOGOOD" ECHO ______________________________________________________ ECHO Adb is not properly connected. ECHO Try "Safely Removing" your N7 from your computer ECHO Then unplug your usb cable, and reinsert it. ECHO ______________________________________________________ ECHO[ ECHO[ ECHO Press any key to try again. ECHO[ ECHO[ PAUSE >nul CLS GOTO START ) SET TS=%DATE:/=%_%TIME::=_% SET TS=%TS:.=% SET TS=%TS: =%.png FFMPEG %ffdebug% %ffshowb% -f rawvideo -vcodec rawvideo -pix_fmt rgb565 -s 1216x1920 -i frmbfr -vf crop=1200:1920:0:0 -vframes 1 -y %TS% IF NOT EXIST %TS% GOTO ERRNE DEL frmbfr >nul ECHO ______________________________________________________ ECHO Screenshot saved as %TS% ECHO ______________________________________________________ ECHO Press 1 or 2 ECHO 1 - Save another screenshot ECHO 2 - Exit ECHO ______________________________________________________ CHOICE /C:12 >nul IF ERRORLEVEL 1 SET K=1 IF ERRORLEVEL 2 SET K=2 IF %K%==1 GOTO SKIPPEDthatPause IF %K%==2 GOTO FINISH :NOFILES CLS ECHO The directory that you are running this script in is: ECHO %~dp0 ECHO[ ECHO You must run this script in the same directory as ECHO adb.exe and ffmpeg.exe. Press any key to exit PAUSE >nul EXIT :ERRNE CLS MODE CON:COLS=108 LINES=200 COLOR 07 FFMPEG -loglevel debug -f rawvideo -vcodec rawvideo -pix_fmt rgb565 -s 1216x1920 -i frmbfr -vf crop=1200:1920:0:0 -vframes 1 -y %TS% ECHO ____________________________________________________________________________________________________________ ECHO There was a problem converting the framebuffer to a png file. ECHO[ ECHO To capture the screen of the cmd window, hold down the alt key and press PrtSc on your keyboard. This ECHO will save an image of the current window in memory on your clipboard. Then open paint or photoshop or ECHO whatever program you use and hit ctrl+N to open a new file, then ctrl+V to paste an image. Save it and ECHO please message me it or post in the XDA forum thread. ECHO[ ECHO[ ECHO If you got to this screen and are not using a Nexus 7 2013, congratulations for successfully pulling ECHO the framebuffer. To figure out the resolution to use, try adding 4,8,16, or 32 to your native width to ECHO make room for the extra data, ioctrls?, at the end of each pixel row. Experiment with different pixel ECHO formats also. ECHO[ ECHO To see a list of all of the pix_fmts supported by ffmpeg, run ffmpeg -pix_fmts ECHO[ ECHO Press 1 or 2 ECHO 1 - Show available pixel formats ECHO 2 - Exit CHOICE /C:12 IF ERRORLEVEL 1 SET K=1 IF ERRORLEVEL 2 SET K=2 IF %K%==1 (cls MODE CON:COLS=52 LINES=200 ffmpeg -hide_banner -pix_fmts pause GOTO FINISH) IF %K%==2 GOTO FINISH :FINISH ADB kill-server -d EXIT