So my friend wants to stream on Twitch.
So I wanted to ask him something: What exactly do you need to transfer the stream from a PS4 to Twitch (with capture card to PC).
What exactly do you have to consider.
The next thing is he needs a more powerful streaming PC or a laptop is enough because the capture card relieves the laptop.
As you already wrote, you need a capture card to record the image signal from the PS4. That would be the best and easiest method.
Another option would be to use the PS4 Remote Play program to transfer a screen transfer from the PS4 to the PC and then record this using screen capture software. However, this method requires a good network connection, a strong PC and the quality can be influenced somewhat.
With both methods, however, a strong PC is still required, because the video stream must be encoded in real time before it can be streamed.