Android How to stream Hikvision IP Camera with 2way audio communication

Question

I am looking for the code to live stream Hikvision cameras in Android App using RTSP stream to play video properly. However unable to find the 2-way Audio communication functionality just like IVMS Official App.

What protocol should be the to be used for same. I tried Hikvision IP Camera APIs but no use.

/ISAPI/System/TwoWayAudio/channels/ID
General Resource v2.0
GET
Description It is used to get a particular two way audio channel
Query None
Inbound Data None
Success Return TwoWayAudioChannel


/ISAPI/System/TwoWayAudio/channels/ID/open General Resource
v2.0
PUT
Description It is used to open the two way audio channel.
Query None
Inbound Data None
Success Return TwoWayAudioSession

Answer 1

this is the isapi url you need to use #define HTTP_TWOWAY_AUDIO_OPEN_URL "/ISAPI/System/TwoWayAudio/channels/1/open" #define HTTP_TWOWAY_AUDIO_CLOSE_URL "/ISAPI/System/TwoWayAudio/channels/1/close" #define HTTP_GET_TWOWAY_AUDIO_URL "/ISAPI/System/TwoWayAudio/channels/1/audioData"

Answer 2

I ended up figuring this out. My blog post on it is here and the source code for the android app I wrote to do it is here. You'll need to take a look at the ISAPI documentation to understand the code (here) but in short, the TwoWayAudio functionality does not use RTSP. Rather when you make the audioData calls to send and receive audio you need to make sure the TCP/IP connection underlying the HTTP call stays open, and then you just send/receive raw bytes over that. Just a warning on the code for the android app: There is a lot of stuff in there hardcoded for my own setup , so might require a bit of modification to get it working in another setup.