pipe is broken while using VideoWritter(ffmpeg)

[yqwang1]

Hi everyone,
Sorry as a new beginner of Bonsai, I am trying to get a higher resolution of video, so I installed package VideoWriter(ffmpeg) and installed ffmpeg on my own computer( in the Bonsai extension folder with ffmpeg-7.1 and ffmpeg.exe).
However I got a error msg "pipe is broken", my output arguement for VideoWriter is just "-s 2560x1440 -c:v h264_nvenc"
anyone has a clue about it? Appreciated in advance.

[banchan86]

Several things to check

1. I believe but i may be wrong, that the Bonsai.FFMPEG library uses the ffmpeg found in the system path rather than the extensions folder. You can check if this is available by typing ffmpeg into the command line.
2. You want to check if h264_nvenc is available using ffmpeg -encoders.
3. Record a short snippet of video with your CameraCapture , and test if you can transcode that file offline with those parameters ie
   ffmpeg -i input.avi -s 2560x1440 -c:v h264_nvenc output.avi you might be missing some parameters

[bruno-f-cruz]

On top of @banchan86 suggestions, proving the bonsai console output may also be useful. Ffmpeg diagnosis should be piped to the console by default.

[yqwang1]

thank you all, it seems i do not have that encoders, and thanks for letting me know I can check the console for error msg as well!