 
[NvFBC patch](patch-fbc.sh) allows to use NvFBC on consumer-grade GPUs. It should be applied same way as NVENC `patch.sh`, except you have to use `patch-fbc.sh` instead.
Skip this step if you already have installed driver with version supported by this patch (from distro packages, for example).
Make sure you have kernel headers and compiler installed before running Nvidia driver installer. Kernel headers and compiler are required to build nvidia kernel module. Recommended way to do this is to install `dkms` package, if it is available in your distro. This way `dkms` package will pull all required dependencies to allow building kernel modules and kernel module builds will be automated in a reliable fashion.
```bash
mkdir /opt/nvidia && cd /opt/nvidia
wget ${example_driver_url}
chmod +x ./${example_driver_file}
./${example_driver_file}
```
### Check driver
```bash
nvidia-smi
```
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.
```bash
bash ./patch.sh
```
You're all set!
## Rollback
If something got broken you may restore patched driver from backup:
```bash
bash ./patch.sh -r
```
## Docker support
It is possible to use this patch with nvidia-docker containers, even if host machine hasn't patched drivers. See `Dockerfile` for example.
Essentially all you need to do during build is:
* `COPY` the `patch.sh` and `docker-entrypoint.sh` files into your container.
* Make sure `docker-entrypoint.sh` is invoked on container start.
`docker-entrypoint.sh` script does on-the-fly patching by means of manipulating dynamic linker to workaround read-only mount of Nvidia runtime. Finally it passes original docker command to shell, like if entrypoint was not restricted by `ENTRYPOINT` directive. So `docker run --runtime=nvidia -it mycontainer echo 123` will print `123`. Also it can be just invoked from your entrypoint script, if you have any.
## Benchmarks
* [Plex Media Server: nVidia Hardware Transcoding Calculator for Plex Estimates](https://www.elpamsoft.com/?p=Plex-Hardware-Transcoding) - useful benchmark of achieved simultaneous transcodes with various stream quality and hardware with patched drivers.
* [Original post in Russian](https://habr.com/post/262563/)
* [3rd party English translation](https://weekly-geekly.github.io/articles/262563/index.html)
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`.
