HOW TO CONVERT system files to .img? - Android Q&A, Help & Troubleshooting

Is there anyway to convert my extracted system files to .img from computer?

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[Q] Lollipop Update Zip

I read somewhere that Google has changed the system used for the standard update zip file.
Therefore you have to convert some .dat files to .img files and .img files to a standard readable folder.
This I understand, however how do I reverse the process above to get back to the .dat file and get a lolipop compatible flashable zip?

[Q] Create system.img from firmware

Can I create system.img from firmware? I see in the firmware zip there is folder system that contain files and folders like the system.img.
How can I create system.img with that folder in firmware zip?
Sorry for my poor Enfglish.

Extract System TWRP Nandroid Backup

Hello. I created a backup of my system files in TWRP but when I want to extract them on PC, 7Zip give me this error: "Cannot open output file" and only extract a few files. I tried renaming the files but doesn't works. I have two files, system.ext4.win000 and system.ext4.win001. EXT4 unpacker does not working. Any way to extract them?

How to extract system.img.ext4?

I accidentally deleted DefaultContrainerService.apk and now I can't install apps. Can someone tell how can I extract system.img.ext4 to get it back?
I think Android Kitchen can do that.
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7-Zip
7-Zip cannot read .img.ext4 files. I used program called sgs2toext4 and now the file is .ext4.img and 7-Zip can read it but it can't extract any .so files. I need to get libdefcontrainer_jni.so from /system/priv-app/DefaultContrainerService/lib/arm.
PetteriM said:
I accidentally deleted DefaultContrainerService.apk and now I can't install apps. Can someone tell how can I extract system.img.ext4 to get it back?
Click to expand...
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Use for that the EXT2 unpacker tool,
https://androidfrog.com/5gt67f
Select Package and then the directory where you want to extract it.
Doesn't work. It can't save that .so file.
same problem here, i try to extract cache.img from S8 firmware (G950FXXU1AQJ1/G950FOXM1AQJ1/G950FXXU1AQJ1/G950FXXU1AQJ1 , 20171018104053) . using ImgExtractor 1.3.7 it extracts , but the extracted zip cannot be opened by any program, with ext4_unpacker (after i fix the img header 4 bytes using sgs4ext4fs) it gives 'list index out of bounds' when i try to extract the zip, using CacheRipperUX it extracts the zip from img but when i try to open the zip using 7-zip it only sees a few files, when i try to open with Winrar it sees full list but cannot extract any of them because it give archive corrupted.
i found a solution: convert the original cache.img (samsung sparse ext4) to raw ext4 using simg2img , and the resulted .img file open with 7-zip and extract the content. My zip content was extracted correctly.
Is there any app for android which can extract .img files like system.img?

kdz and dz files to system.img

hello, i used WindowsLGFirmwareExtractor to extract a kdz file to a dz file. then i merged into a system.img file. then opened that file in ext2explore. there is an app folder with all the apps in it. what i would like to know is first, can i delete the apps i dont want, and second, re-create a kdz file and flash that. and how do i make a new file to flash? would i delete the whole folder, or just the apk inside the folder?

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