[mythtv] Possible playback scenarios for the iPhone
kkuphal at gmail.com
Mon Jul 21 15:56:26 UTC 2008
On Sun, Jul 20, 2008 at 2:13 PM, Chase Douglas <chasedouglas.lists at gmail.com>
> On Jul 19, 2008, at 5:19 PM, Kevin Kuphal wrote:
> On Fri, Jul 18, 2008 at 5:58 PM, Chase Douglas <
> chasedouglas.lists at gmail.com> wrote:
>> I am interested in developing a frontend for the iPhone with live tv
>> playback, but there are two hurdles along the way:
>> 1. Content is encoded in the format coming from the tuner device, and
>> as far as I am aware, no tuning device outputs an iPhone compatible
>> 2. The iPhone SDK (I'm trying to keep this under Apple's terms as
>> well) has no streaming video support. At best, it can take a static
>> file and stream that from a URL, but there's no support for streaming
>> mutable content like an rtsp:// stream. A further complication is
>> Apple's insistence that developers cannot access the framebuffer.
>> The first issue could be remedied through live transcoding before
>> streaming to the device. This isn't implemented yet, but is possible.
>> The second issue is a much higher hurdle. Without the ability to play
>> streaming content within the SDK, the only way this could work is
>> through software decoding and playback through either a quartz
>> graphics layer or an opengl layer. I've never written any rendering
>> software but I know it's possible. My question is: would the iPhone be
>> powerful enough for a reasonably encoded stream to be played back? By
>> reasonable, I'm thinking standard mpeg-2 or the mpeg-4 encoding, but
>> keeping in mind that I'll have no access to the hardware acceleration
>> already present on the iPhone.
> Have you seen this?
> That will only work with streaming static, recorded content. A
> live-streaming implementation is needed to be able to watch live tv
"Live" streaming is only streaming a recording in progress. It shouldn't be
that hard to browse the guide, kick off a recording, and then streaming
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