channeladam / channeladam.hevc

Change the metadata encoded into an HEVC / H.265 video stream

ChannelAdam.Hevc

DEPRECATION NOTE

FFmpeg 4.0 (2018-04-20) now has an HEVC bitstream filter with functionality to manipulate the HEVC metadata.

This is still good sample C# code...

Overview

An HEVC / H.265 C# library.

Provides an INCOMPLETE implementation for parsing and manipulating the data in an HEVC / H.265 byte stream, WITHOUT re-encoding and changing the video quality.

The .NET Core console application can currently change the Sample Aspect Ratio (SAR) that is encoded into the video stream.

Usage

To change the Sample Aspect Ratio of a HEVC video:

1. You need to de-mux or extract the raw HEVC / H.265 video stream - using a tool such as FFMpeg or MkvExtract.

   • e.g. ffmpeg -i "myvideo.h265.mkv" -vcodec copy -an "myvideo.hevc"
   • e.g. mkvextract tracks "myvideo.h265.mkv" 0:"myvideo.hevc"

2. Run this console application to change the SAR enbedded within that video stream. e.g. C:\ChannelAdam.Hevc\ChannelAdam.Hevc.NalUnitChanger.Console> dotnet run /in="myvideo.hevc" /out="out.hevc" /sarWidth=1 /sarHeight=1

3. Use your favourite tool (e.g. FFMPeg, MkvMerge, Mkvtoolnix-gui, etc) to re-mux the video stream with your original audio stream to bring it all back together again.