# nvidia-patch
This patch removes restriction on maximum number of simultaneous NVENC video encoding sessions imposed by Nvidia to consumer-grade GPUs.
Requirements:
- x86\_64 system architecture
- ubuntu (< 18.04 for 375 . 39 nvidia driver or kernel < 4 . 15 ). Also known to work on Debian and CentOS , but not tested widely .
- nvenc-compatible gpu (https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Encoder)
- Nvidia driver. Patch availible for:
- [375.39 ](https://download.nvidia.com/XFree86/Linux-x86_64/375.39/NVIDIA-Linux-x86_64-375.39.run )
- [390.87 ](https://download.nvidia.com/XFree86/Linux-x86_64/390.87/NVIDIA-Linux-x86_64-390.87.run )
- [396.24 ](https://download.nvidia.com/XFree86/Linux-x86_64/396.24/NVIDIA-Linux-x86_64-396.24.run )
- [396.26 ](https://uk.download.nvidia.com/tesla/396.26/NVIDIA-Linux-x86_64-396.26.run )
- [396.37 ](https://uk.download.nvidia.com/tesla/396.37/NVIDIA-Linux-x86_64-396.37.run )
- [396.54 ](https://download.nvidia.com/XFree86/Linux-x86_64/396.54/NVIDIA-Linux-x86_64-396.54.run )
- 410.48
- [410.57 ](https://download.nvidia.com/XFree86/Linux-x86_64/410.57/NVIDIA-Linux-x86_64-410.57.run )
- [410.73 ](https://download.nvidia.com/XFree86/Linux-x86_64/410.73/NVIDIA-Linux-x86_64-410.73.run )
- [410.78 ](https://download.nvidia.com/XFree86/Linux-x86_64/410.78/NVIDIA-Linux-x86_64-410.78.run )
- [410.79 ](https://uk.download.nvidia.com/tesla/410.79/NVIDIA-Linux-x86_64-410.79.run )
- [415.18 ](https://download.nvidia.com/XFree86/Linux-x86_64/415.18/NVIDIA-Linux-x86_64-415.18.run )
- [415.25 ](https://download.nvidia.com/XFree86/Linux-x86_64/415.25/NVIDIA-Linux-x86_64-415.25.run )
Tested on Ubuntu 18.04 LTS (GNU/Linux 4.15.0-23-generic x86\_64)
## step-by-step :
### Download driver
[https://download.nvidia.com/XFree86/Linux-x86\_64/410.78/NVIDIA-Linux-x86\_64-410.78.run ](https://download.nvidia.com/XFree86/Linux-x86_64/410.78/NVIDIA-Linux-x86_64-410.78.run )
### Install driver (410.78)
```bash
mkdir /opt/nvidia & & cd /opt/nvidia
wget https://download.nvidia.com/XFree86/Linux-x86_64/410.78/NVIDIA-Linux-x86_64-410.78.run
chmod +x ./NVIDIA-Linux-x86_64-410.78.run
./NVIDIA-Linux-x86_64-410.78.run
```
### Check driver
```bash
nvidia-smi
```
### Patch libnvidia-encode.so (with backup)
```bash
bash ./patch.sh
```
### Silent patch libnvidia-encode.so
```bash
bash ./patch.sh -s
```
### Rollback libnvidia-encode.so (restore from backup)
```bash
bash ./patch.sh -r
```
## See also
https://habr.com/post/262563/
If you experience `CreateBitstreamBuffer failed: out of memory (10)` , then you have to lower buffers number used for every encoding session. If you are using `ffmpeg` , see option `-surfaces` ("Number of concurrent surfaces") and try value near `-surfaces 8` .