simple_video_upscale

simple_video_upscale

Scales a 480p (854x480) video up to Full HD 1080p (1920x1080) using AVBlocks Transcoder with hardcoded input and output file paths.

This sample demonstrates the basic AVBlocks video upscaling workflow:

1. Initialize the AVBlocks library
2. Create a MediaInfo object to probe the input file
3. Create an input MediaSocket from the probed media info
4. Clone the input socket to start with an identical output configuration
5. Set the output frame size to 1920x1080 on the output video pin
6. Set the resize interpolation method to Cubic, best for upscaling quality
7. Configure a Transcoder with the input and output sockets
8. Run the transcode operation

No command line parsing is used — the input and output file paths are hardcoded in the source code.

Building (x64)

From the repository root:

mkdir -p build/debug_x64
cd build/debug_x64
cmake -G 'Ninja' -DCMAKE_BUILD_TYPE=debug -DPLATFORM=x64 ../../samples
ninja

The built executable will be placed in bin/x64/simple_video_upscale.

Building (arm64)

From the repository root:

mkdir -p build/debug_arm64
cd build/debug_arm64
cmake -G 'Ninja' -DCMAKE_BUILD_TYPE=debug -DPLATFORM=arm64 ../../samples
ninja

The built executable will be placed in bin/arm64/simple_video_upscale.

Running (x64)

1. Download the sample video, the MP4 file from the TED talk video What's the next window into our universe? by Andrew Connolly (480p, 854x480):

   curl -L -o AndrewConnolly_2014.mp4 \
       https://archive.org/download/AndrewConnolly_2014/AndrewConnolly_2014.mp4

2. Run the sample from the sample directory (the input/output file paths are relative to the working directory):

   cd samples/linux/simple_video_upscale
   ../../../bin/x64/simple_video_upscale

3. The upscaled output file AndrewConnolly_2014_1080p.mp4 will be created in the samples/linux/simple_video_upscale directory.

Running (arm64)

1. Download the sample video, the MP4 file from the TED talk video What's the next window into our universe? by Andrew Connolly (480p, 854x480):

   cd samples/linux/simple_video_upscale
   curl -L -o AndrewConnolly_2014.mp4 \
       https://archive.org/download/AndrewConnolly_2014/AndrewConnolly_2014.mp4

2. Run the sample from the sample directory (the input/output file paths are relative to the working directory):

   ../../../bin/arm64/simple_video_upscale

3. The upscaled output file AndrewConnolly_2014_1080p.mp4 will be created in the samples/linux/simple_video_upscale directory.

Notes

• The input file AndrewConnolly_2014.mp4 and output file AndrewConnolly_2014_1080p.mp4 paths are hardcoded in simple_video_upscale.cpp. They are relative to the working directory from which the executable is run.
• If transcoder->open() fails, it may be because AndrewConnolly_2014_1080p.mp4 already exists in the directory. Delete the output file and try again.
• The output video stream is resized to 1920x1080 (Full HD) using InterpolationMethod::Cubic, which gives the best upscaling quality at the cost of speed. The audio stream is copied from the source as is.