%LOCALAPPDATA%\Rockstar Games\GTA V\videos\rendered
Safe use in GTA Online not guaranteed - dsound.dll injection was used before by ASI Loader and Scripthook 
Run this program as an administrator
The error message usually means corrupted data files. A manual action is required to solve the issue.
Unplug other USB attachments. The Mayflash DolphinBar will cause this problem.
Faulting application name: GTA5.exe
Faulting module name: 811EZFRD64.DLL
If you have mods, and you renamed mods folder to have stock game (the method could just stop working properly - you can delete dinput8.dll instead in some cases)
Or make sure you have folders mpchristmas2 and mppatchesng with dlc.rpf file inside, in location \update\x64\dlcpacks.
Manual download available in description of the video
Locks FPS on 30 FPS, or 60 FPS if performance is high enough.
"-framelimit 2" command is just 30 FPS cap.
These settings can reduce CPU/GPU load and increase game stability if game oscilates near these FPS values.
Make sure you have deleted all newer updates than patchday5ng and older in \update\x64\dlcpacks\. Leave previous patchdayXng folders.
metadata.dat, update.rpf, GTAV.exe, GTAVLauncher.exe, and Social Club specific version have to be gathered from external source, relevant to the files of update 5. Also preserve previous mp_xxx folders until the update 5, otherwise, some missions may be unplayable (eg. Tonya will not appear outside the Franklin's house - christmas2 and mppatchesng).
For 8GB/16GB RAM users it can be set: in field initial size - 400, and in maximum - 16000, for 4GB RAM - 8192.
The best setting for game beeing installed on eg. D: drive is to have page file disabled on all partions except C: (system's partition will be used for page file globally - make sure you have enough space). If you possess second HDD beside the one on which you had installed the game, use it instead of C: for pagefile. Besides, SSD may behave as the fastest for this purpose. If you have slow HDD with 4GB RAM, set ~6GB in the field "initial size". 
Further instructions here
And also be aware that 5400 RPM 2.5" HDDs on 4GB cause textures disapering during gameplay.
If works, FPS boost will be most noticeable nearby the area of grass.
Working confirmed by Nvidia users (so far).
Plug in pendrive, and RBM on it in My Computer, go to ReadyBoost, then click "Dedicate this device to ReadyBoost". Since now, game may stutter less on 4GB RAM configurations (mostly during intensive using HDD and page file during the game).
Before playing, make sure that process System, SysMain, or svhost.exe (LocalServiceNetworkRestricted -p) stopped using disk. The last one can be closed in Resource Monitor.
Play on Windows 7 (x64 required) when using low amounts of RAM (2 or 3GB). Game stutters much less on 7 than on 10 on 2 and 3GB of RAM (e.g. while running on low details).
It is a script which closes certain process and changes priorities until the close of the game.
Just load the game world before running the script.
The tool can be useful to improve game stability.
Script for offline mode users (subprocess.exe termination command added).
The issue is due to N versions of Windows, because it has no built-in Media Features Pack.
Go to %USERPROFILE%\Documents\Rockstar Games\Social Club\Profiles\ and delete all folders except the one with GTA V folder inside \Titles.
Full instructions here