High Bitrate Bitstream Decoding - 2023.1 English

H.264/H.265 Video Codec Unit v1.2 Solutions LogiCORE IP Product Guide (PG252)

Document ID
Release Date
2023.1 English

To reduce frame decoding time for bitstreams greater than 100 Mb/s at 4kP30, use the following options:

  • Increase internal decoder buffers (internal-entropy-buffers parameter) to 9 or 10.
  • Add a queue at the decoder input side

The following command decodes an H.264 MP4 file using an increased number of internal entropy buffers and displays it via DisplayPort.

gst-launch-1.0 filesrc location="input-file.mp4" ! qtdemux name=demux demux.video_0 ! h264parse ! queue max-size-bytes=0 ! omxh264dec internal-entropy-buffers=10 ! queue max-size-bytes=0 ! kmssink bus-id=fd4a0000.display fullscreen-overlay=1