diff --git a/compile-ffmpeg.md b/technical-notes.md
similarity index 65%
rename from compile-ffmpeg.md
rename to technical-notes.md
index a380e5a..eeac437 100644
--- a/compile-ffmpeg.md
+++ b/technical-notes.md
@@ -1,21 +1,26 @@
-# Compile FFmpeg for ffmpeg-api
+# Techinical notes for ffmpeg-api
+
+## high444 profile of the H264 codec
+The high444 profile of the H264 codec is not supported in the latest version of Firefox and some Safari releases as of May 2024. In this project, we included the option `-fix_fmt yuv420p` along with the `high` profile.
+
+## Compile FFmpeg for ffmpeg-api
 
 This article is an FFmpeg compilation guide that is used as a reference when you want to run it in a non-container environment.
 
-## Required packages
+### Required packages
 * X264-devel (yum), libx264-dev (apt): available in major Linux distributions
 * [Fraunhofer FDK AAC](https://github.com/mstorsjo/fdk-aac) (No GPL, Need compile from the source code)
 
-## Download FFmpeg source code
+### Download FFmpeg source code
 * https://ffmpeg.org/download.html
 * Direct link: https://ffmpeg.org/releases/ffmpeg-7.0.tar.xz
 
-## Compile FFmpeg (Minimal options)
+### Compile FFmpeg (Minimal options)
 
 ```bash
 wget https://ffmpeg.org/releases/ffmpeg-7.0.tar.xz
 tar xvf ffmpeg-7.0.tar.xz
-cd FFmpeg-7.0
+cd ffmpeg-7.0
 mkdir build
 cd build
 ../configure --enable-gpl --enable-libx264 --enable-nonfree --enable-libfdk-aac