Error: Ffmpeg exited with error code: null

[mrsalhaoui]

Hello!

I'm trying to control the drone to an IoT gateway that has a Yocto system, I added the FFMPEG package to it, but this time I have got this Error :

Error: Ffmpeg exited with error code: null

Does someone know please what does it mean this error ?

and which options PngEncoder.js passes to ffmpeg when the problem occurs ?