Video Codec Test Guide
This guide shows how to generate test videos with FFmpeg and validate hardware video encode/decode on Radxa Dragon Q8B using GStreamer.
tip
It is recommended to test with the latest BIOS firmware and system image. Some sample videos in the test resources cannot be played correctly with GStreamer. To keep the test conditions consistent, generate all test videos with FFmpeg first, and then validate hardware decoding with GStreamer.
Preparation
Install GStreamer
Device
sudo apt update
sudo apt install gstreamer1.0-tools
Install FFmpeg
Device
sudo apt install ffmpeg
Decode Examples
The following examples use FFmpeg to generate a 10-second 1080p 30FPS test video, and then use GStreamer to validate hardware decoding.
AVC / H.264 Decode
Device
ffmpeg -f lavfi -i testsrc=duration=10:size=1920x1080:rate=30 -c:v libx264 -pix_fmt yuv420p -preset fast -crf 18 1080p-AVC-8bit-30FPS.mp4
gst-launch-1.0 filesrc location=./1080p-AVC-8bit-30FPS.mp4 ! qtdemux ! h264parse ! v4l2h264dec capture-io-mode=4 output-io-mode=4 ! video/x-raw,format=NV12 ! waylandsink fullscreen=true
HEVC / H.265 Decode
Device
ffmpeg -f lavfi -i testsrc=duration=10:size=1920x1080:rate=30 -c:v libx265 -preset fast -pix_fmt yuv420p -crf 14 1080p-HEVC-8bit-30FPS.mp4
gst-launch-1.0 filesrc location=./1080p-HEVC-8bit-30FPS.mp4 ! qtdemux ! h265parse ! v4l2h265dec capture-io-mode=4 output-io-mode=4 ! video/x-raw,format=NV12 ! waylandsink fullscreen=true
VP9 Decode
Device
ffmpeg -f lavfi -i testsrc=duration=10:size=1920x1080:rate=30 -c:v libvpx-vp9 -pix_fmt yuv420p -b:v 0 -crf 30 -row-mt 1 -threads 8 1080p-VP9-8bit-30FPS.webm
gst-launch-1.0 -e filesrc location=./1080p-VP9-8bit-30FPS.webm ! matroskademux ! v4l2vp9dec capture-io-mode=4 output-io-mode=4 ! video/x-raw,format=NV12 ! waylandsink fullscreen=true
GStreamer Hardware Encode Validation
Only the HEVC / H.265 1080p 30FPS encode validation example is kept below:
Device
gst-launch-1.0 -e videotestsrc num-buffers=150 ! video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1 ! v4l2h265enc ! h265parse ! mp4mux ! filesink location=1080p-HEVC-8bit-30FPS.mp4
gst-launch-1.0 filesrc location=./1080p-HEVC-8bit-30FPS.mp4 ! qtdemux ! h265parse ! v4l2h265dec capture-io-mode=4 output-io-mode=4 ! video/x-raw,format=NV12 ! waylandsink fullscreen=true