If some software in your windows OS wants avcodec_datastead_rtsp_x86-57.dll your operating system will ask for DLL file. When that DLL file is not available you will get this error.
If you have moved your file or changed the name of dll file you will get this error.
You will mostly see there errors when you dll file is missing:
avcodec_datastead_rtsp_x86-57.dll not found
This application failed to start because avcodec_datastead_rtsp_x86-57.dll was not found. Re-installing the application may fix this problem.
There was a problem opening avcodec_datastead_rtsp_x86-57.dll.
Windows failed to start the software because this avcodec_datastead_rtsp_x86-57.dll is missing.
avcodec_datastead_rtsp_x86-57.dll can not be started.
File execution can not start avcodec_datastead_rtsp_x86-57.dll not found.
How To Fix avcodec_datastead_rtsp_x86-57.dll error?
Reinstall the program that asked the avcodec_datastead_rtsp_x86-57.dll.
Update your application to new version.
Update your windows OS.
avcodec_datastead_rtsp_x86-57.dll Download and install in your windows.
Registry clear and optimize Windows OS.
If you need avcodec_datastead_rtsp_x86-57.dll Download it right now and install it into your system to fix the error as soon as possible. just Install avcodec_datastead_rtsp_x86-57.dll and fix your error.