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|
# `hello-encode` Sample
This sample shows how to use the oneAPI Video Processing Library (oneVPL) to
perform simple video encode.
| Optimized for | Description
|----------------- | ----------------------------------------
| OS | Ubuntu* 20.04; Windows* 10
| Hardware | Compatible with Intel® oneAPI Video Processing Library(oneVPL) GPU implementation, which can be found at https://github.com/oneapi-src/oneVPL-intel-gpu
| | and Intel® Media SDK GPU implementation, which can be found at https://github.com/Intel-Media-SDK/MediaSDK
| Software | Intel® oneAPI Video Processing Library(oneVPL)
| What You Will Learn | How to use oneVPL to encode a raw video file to H.265
| Time to Complete | 5 minutes
## Purpose
This sample is a command line application that takes a file containing a raw
format video elementary stream as an argument. Using oneVPL, the application encodes and
writes the encoded output to `a out.h265` in H.265 format.
Native raw frame input format: CPU=I420, GPU=NV12.
## Key Implementation details
| Configuration | Default setting
| ----------------- | ----------------------------------
| Target device | CPU
| Input format | I420
| Output format | H.265 video elementary stream
| Output resolution | same as the input
## License
Code samples are licensed under the MIT license. See
[License.txt](https://github.com/oneapi-src/oneAPI-samples/blob/master/License.txt) for details.
## Building the `hello-encode` Program
### Include Files
The oneVPL include folder is located at these locations on your development system:
- Windows: %ONEAPI_ROOT%\vpl\latest\include
- Linux: $ONEAPI_ROOT/vpl/latest/include
### On a Linux* System
Perform the following steps:
1. Install the prerequisite software. To build and run the sample you need to
install prerequisite software and set up your environment:
- Intel® oneAPI Base Toolkit for Linux*
- [CMake](https://cmake.org)
2. Set up your environment using the following command.
```
source <oneapi_install_dir>/setvars.sh
```
Here `<oneapi_install_dir>` represents the root folder of your oneAPI
installation, which is `/opt/intel/oneapi/` when installed as root, and
`~/intel/oneapi/` when installed as a normal user. If you customized the
installation folder, it is in your custom location.
3. Build the program using the following commands:
```
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
cmake --build .
```
4. Run the program with default arguments using the following command:
```
./hello-encode -sw -i ../../../content/cars_320x240.i420 -w 320 -h 240
```
### On a Windows* System Using Visual Studio* Version 2017 or Newer
#### Building the program using CMake
1. These instructions assume you can read and write to the location
the examples are stored. If the examples have been installed in a
protected folder such as "Program Files" copy the entire `examples`
folder to a location with Read/Write access such as the Desktop
(%USERPROFILE%\Desktop) and resume these instruictions from that copy.
2. Install the prerequisite software. To build and run the sample you need to
install prerequisite software and set up your environment:
- Intel® oneAPI Base Toolkit for Windows*
- [CMake](https://cmake.org)
3. Set up your environment using the following command.
```
<oneapi_install_dir>\setvars.bat
```
Here `<oneapi_install_dir>` represents the root folder of your oneAPI
installation, which is which is `C:\Program Files (x86)\Intel\oneAPI\`
when installed using default options. If you customized the installation
folder, the `setvars.bat` is in your custom location. Note that if a
compiler is not part of your oneAPI installation you should run in a Visual
Studio 64-bit command prompt.
4. Build the program with default arguments using the following commands:
```
mkdir build
cd build
cmake ..
cmake --build . --config Release
```
5. Run the program using the following command:
```
Release\hello-encode -sw -i ..\..\..\content\cars_320x240.i420 -w 320 -h 240
```
## Running the Sample
### Example Output
```
Implementation details:
ApiVersion: 2.5
Implementation type: SW
AccelerationMode via: NA
Path: /opt/intel/oneapi/vpl/2021.6.0/lib/libvplswref64.so.1
Encoding /home/test/intel_innersource/frameworks.media.onevpl.dispatcher/examples/hello/hello-encode/content/cars_320x240.i420 -> out.h265
Input colorspace: I420 (aka yuv420p)
Encoded 30 frames
```
You can find the output file `out.h265` in the build directory.
You can display the output with a video player that supports raw streams such as
FFplay. You can use the following command to display the output with FFplay:
```
ffplay out.h265
```
|
