to occasionally stream times of the PS4 or take smaller Lets Plays I've bought the new Elgato Game Capture HD60.
I'm really excited what this little device makes!
The recorded material has a very good quality. Both the image and sound from her.
sher nice is the accompanying software with which you can integrate additional frames in the live image in the live stream. Here integrate a webcam with as a logo and there maybe a banner. This option is, however, only available on Windows systems! Otherwise, the Game Capture software works fine on Mac OS X Yosemite.
Side note:
For shooting the PS4 the HDCP encryption of HDMI signal must be disabled in the menu Playstation. Otherwise, the Elgato Game Capture HD60 receive no signal.
If the HDCP encryption is disabled, however, streaming services such as Amazon Instant Video, etc. no longer work. These require HDCP encryption. So there you have whenever you need time off back and forth.
To record a material PS3 HDMI Splitter has to be bought, which the HDCP signal can break and forwards unencrypted. A good and effective splitter can be found at folgedem Link:
(HDMI 1x2 Splitter Full HD 1 IN 2 OUT for 3D 1080P HDTV PC from WINGONEER)
For me, these are a great tool for beginners and advanced players in the world of Lets Plays and streaming.