问题
Tried almost everything, spent almost 4-5 days trying and still counting.
The reason I want to compile recent version of ffmpeg is because https://github.com/WritingMinds/ffmpeg-android-java doesn't work for video rotation. For this also I tried multiple answers, different versions of answer (transpose=1, transpose=dir=cclock, etc)
Somewhere it was mentioned that rotate command wont work with previous versions of ffmpeg, so after a lot of trials, I started working on compilation of new ffmpeg. But all the tutorials for ffmpeg belong to earlier versions (of Android NDk, ffmpeg) which wont work with ffmpeg 3.2 and NDK r13b (I also tried with NDK downloaded by studio itself but no luck). In case it worked for you, please help.
After a lot of frustrating experience I am writing this. Please help with a workflow or a clear direction. Thanks
Wasnt able to tag ffmpeg3.2 because of reputation.
来源：https://stackoverflow.com/questions/40723256/cant-use-ffmpeg-3-2-in-android-project