Normal iPhone Video Recording App vs HLT Difference?

[Dubbedown]

Is there a difference between how recordings are done between the normal iPhone video app vs HLT?

Reason I ask is because with the normal built-in app from iOS I'm able to record using an external microphone. However it seems whenever I record video with HLT, it defaults to the phone's internal microphone.

[Harry]

Hi,

LapTimer selects the so called default audio device when recording. This seems to be the internal mic usually. As I do not have experience with connecting external mics, how do you do it and how do you select the device? There is a pretty generic interface to select devices, it does probably allow more than what LT does currently...

- Harry

[Dubbedown]

Hi Harry

So as you know there's no separate microphone jack so you basically plug a microphone in the headphone jack and one of these adapters (depending your mic is powered or not)

http://www.kvconnection.com/product-p/km-iphone-mic.htm
http://www.kvconnection.com/product-p/k ... ic-ecm.htm

Here's a test using iPhones standard video internal mic vs external mic with adapter:

Internal (you hear music playing)
http://www.youtube.com/watch?v=l_U9AbyLnlE

External (no music only exhaust!)
http://www.youtube.com/watch?v=SnT88MAJAYQ

[Harry]

Hi again,

When connecting to the so called audio capture device, LapTimer asks for the "default" capture device. I have tested availability of alternative devices - iOS has a service to request the full list of available devices here.

When plugging in the stock headset, the audio capture devices(!) change from

Code: Select all

    "<AVCaptureFigAudioDevice: 0x21323240 [Microphone][com.apple.avfoundation.avcapturedevice.built-in_audio:0]>"

to

Code: Select all

    "<AVCaptureFigAudioDevice: 0x21323240 [Headphones][com.apple.avfoundation.avcapturedevice.built-in_audio:0]>"

The iPhone reports these devices alternating - only one at a time. In this configuration LT has no chance selecting anything...
I thought I would find something like

Code: Select all

    "<AVCaptureFigAudioDevice: 0x21323240 [Microphone][com.apple.avfoundation.avcapturedevice.built-in_audio:0]>"

without an external device connected and

Code: Select all

    "<AVCaptureFigAudioDevice: 0x21323240 [Microphone][com.apple.avfoundation.avcapturedevice.built-in_audio:0]>"
    "<AVCaptureFigAudioDevice: 0x21323240 [Headphones][com.apple.avfoundation.avcapturedevice.built-in_audio:1]>"

with an external device connected... Maybe your mic plug is connected in a different way than the headset resulting in both the internal microphone above and an external one... And the Video app selects the no standard device if available... I need to further investigate here.

I have not found an adaptor like yours here in Germany so far - for testing. Need to further check

- Harald

P.S. For documentation purpose, here is the spec of the iPhone plug: http://pinouts.ru/HeadsetsHeadphones/ip ... nout.shtml

[Dubbedown]

Thanks Harry, it's honestly not a big deal so don't go crazy looking into this. I'm quite content with everything as is but figured itd be a nice additional feature.