saving mp4s

[JulianDay-Cooney]

Hi, I want to save long videos (>24 hours) and uncompressed avi format videos are way too large. Is there a way to save them as mp4s?

Thanks!

[bruno-f-cruz]

You can use ffmpeg to save your videos in a variety of formats.
How to install ffmpeg
To save the videos you can use the attached workflow or you can play around with the recent VideoWriter(ffmpeg) node that takes care of all the pipeline for you :)

To save in .mp4, the following settings have worked for me in the past:
-y -f rawvideo -vcodec rawvideo -s 640x480 -r 30 -pix_fmt bgr24 -i \\.\pipe\video -c:v libx264 -b:v 2M -maxrate 2M -bufsize 1M output.mp4
ffmpegmp4.zip

[bruno-f-cruz]

If you want to save multiple files simultaneously, you will have to create new pipes and filenames for each one.
As for the ffmpeg node, can you send me your workflow so I can take a look? thanks

[JulianDay-Cooney]

Github doesn't seem to like workflow attachments. Any idea how to attach a .bonsai file? But the workflow I'm testing is simply VideoCaptureDevice-->VideoWriter(ffmpeg). The full output argument I use is:
-y -f rawvideo -vcodec rawvideo -s 640x480 -r 30 -pix_fmt bgr24 -i \.\pipe\video -c:v libx264 -b:v 2M -maxrate 2M -bufsize 1M C:\Users\BehaviorRig\Desktop\LocalData\test.mp4

With regard to creating a new "pipe", I'm not sure exactly what that means. Am I switching out this bit: \.\pipe\video for a new naming convention?

[bruno-f-cruz]

You need to zip the bonsai file, as GitHub only allows a few selected file extensions to be attached unfortunately.

You can change to pipe name by replacing the path after the last "". Eg. Video2.

[bruno-f-cruz]

Sorry I didnt even look at your screenshot, my bad.
Can you try to use the attached workflow? It should save a .mp4 from a camera stream.

FFMPEG_example.zip

[JulianDay-Cooney]

That worked great! Thanks so much for your help.