plato-messaging / frame-grabber

Frame Grabber

A little program that grabs the first frame of a video and returns it in a JPEG format

Video is provided as a byte buffer and returns the frame as a byte buffer as well

Usage

macOS

• Run build.sh
• Copy out/libfgrabber.dylib to /usr/local/lib

Linux

• Make sure to set JAVA_HOME as env variable
• sudo apt install clang
• Run build_linux.sh or build_and_deploy_linux.sh

NB: .vscode intentionally added to repo to help whoever struggles setting up VSCode

Ffmpeg dylib generation

See: Compilation guide

• Run following command to deploy libraries in prefix directory (enable-shared to generate *.dylib)

./configure --prefix=/usr/local --enable-shared

• Run

make install

frame-grabber's Issues

Some MP4 h.264 movie cannot be decoded due to "Unspecified pixel format" error

Some MP4 h.264 movie cannot be decoded due to "Unspecified pixel format" error

This prevents from being able to grab frame.
Although the following command works successfully

ffprobe <file_name>

Upgrade dependency to latest FFMpeg

Upgrade dependency to latest FFMpeg

5.1 seems to be latest