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# nvidia-patch
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This patch removes restriction on maximum number of simultaneous NVENC video encoding sessions imposed by Nvidia to consumer-grade GPUs.
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Main target operating system is GNU/Linux, but for experimental Windows support see [win ](win ).
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Requirements:
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- 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 .
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- nvenc-compatible gpu (https://developer.nvidia.com/video-encode-decode-gpu-support-matrix#Encoder)
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- 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 )
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- [396.26 ](https://international.download.nvidia.com/tesla/396.26/NVIDIA-Linux-x86_64-396.26.run )
- [396.37 ](https://international.download.nvidia.com/tesla/396.37/NVIDIA-Linux-x86_64-396.37.run )
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- [396.54 ](https://download.nvidia.com/XFree86/Linux-x86_64/396.54/NVIDIA-Linux-x86_64-396.54.run )
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- 410.48
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- [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 )
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- [410.79 ](https://international.download.nvidia.com/tesla/410.79/NVIDIA-Linux-x86_64-410.79.run )
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- [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 )
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Tested on Ubuntu 18.04 LTS (GNU/Linux 4.15.0-23-generic x86\_64)
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## Synopsis
```
# bash ./patch.sh -h
SYNOPSIS
patch.sh [OPTION]...
DESCRIPTION
The patch for Nvidia drivers to increase encoder sessions
-s Silent mode (No output)
-r Rollback to original (Restore lib from backup)
-h Print this help message
```
## Step-by-Step guide
Examples are provided for driver version 410.78. All commands are runned as root.
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### Download driver
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[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 )
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### Install driver
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```bash
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mkdir /opt/nvidia & & cd /opt/nvidia
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wget https://download.nvidia.com/XFree86/Linux-x86_64/410.78/NVIDIA-Linux-x86_64-410.78.run
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chmod +x ./NVIDIA-Linux-x86_64-410.78.run
./NVIDIA-Linux-x86_64-410.78.run
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```
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### Check driver
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```bash
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nvidia-smi
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```
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Output should show no errors and details about your driver and GPU.
### Patch driver
This patch performs backup of original file prior to making changes.
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```bash
bash ./patch.sh
```
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You're all set!
## Rollback
If something got broken you may restore patched driver from backup:
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```bash
bash ./patch.sh -r
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```
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## See also
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https://habr.com/post/262563/
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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` .
