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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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Requirements:
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- ubuntu (< 18.04 for 375 . 39 nvidia driver or kernel < 4 . 15 )
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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:
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- 375.39 - http://download.nvidia.com/XFree86/Linux-x86_64/375.39/NVIDIA-Linux-x86_64-375.39.run
- 390.87 - http://download.nvidia.com/XFree86/Linux-x86_64/390.87/NVIDIA-Linux-x86_64-390.87.run
- 396.24 - http://download.nvidia.com/XFree86/Linux-x86_64/396.24/NVIDIA-Linux-x86_64-396.24.run
- 396.26 - http://download.nvidia.com/XFree86/Linux-x86_64/396.26/NVIDIA-Linux-x86_64-396.26.run
- 396.37 - http://download.nvidia.com/XFree86/Linux-x86_64/396.37/NVIDIA-Linux-x86_64-396.37.run
- 396.54 - http://download.nvidia.com/XFree86/Linux-x86_64/396.54/NVIDIA-Linux-x86_64-396.54.run
- 410.48 - http://download.nvidia.com/XFree86/Linux-x86_64/410.48/NVIDIA-Linux-x86_64-410.48.run
- 410.57 - http://download.nvidia.com/XFree86/Linux-x86_64/410.57/NVIDIA-Linux-x86_64-410.57.run
- 410.73 - http://download.nvidia.com/XFree86/Linux-x86_64/410.73/NVIDIA-Linux-x86_64-410.73.run
- 410.78 - http://download.nvidia.com/XFree86/Linux-x86_64/410.78/NVIDIA-Linux-x86_64-410.78.run
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Tested on Ubuntu 18.04 LTS (GNU/Linux 4.15.0-23-generic x86_64)
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## step-by-step :
### Download driver
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http://download.nvidia.com/XFree86/Linux-x86_64/410.78/NVIDIA-Linux-x86_64-410.78.run
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### Install driver (410.78)
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```bash
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mkdir /opt/nvidia & & cd /opt/nvidia
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wget http://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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### Patch libnvidia-encode.so (with backup)
```bash
bash ./patch.sh
```
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### Silent patch libnvidia-encode.so
```bash
bash ./patch.sh -s
```
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### Rollback libnvidia-encode.so (restore from backup)
```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` , consider using this [patch ](https://gist.github.com/Snawoot/70ae403716c698cb86ab015626d72bd4 ).
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