Any way to force audio to stay on HDMI?
Any way to force audio to stay on HDMI and not go back to Internal Speakers once the a/v receiver is off?
To explain what is happening in more detail I have a mac mini hooked up to my TV and my computer monitor using an HDMI Distribution Amplifier. This way I can use the mac on my tv or at my desk. For some reason when the TV is shut off or if I switch the source of my desktop monitor to something else. The mac will go back to internal speakers. Is there any way to prevent this? I am assuming this is happening becuase the mac is losing the handshake with the monitor when I switch my source. If that is the case is there anything I can get to put before my DA that will make my mac think that something is always there?
It would be more ideal if I can just permanently set the audio output to hdmi from within the mac itself though.
The only really effective solution requires buying a Gefen HDMI Detective Plus this 'spoofs' the HDMI signal so the Mac thinks it is still there even if the AV receiver is turned off, or disconnected, or switched away from the Mac.
See http://www.gefen.com/kvm/dproduct.jsp?prod_id=8005
I bought a couple on eBay.
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Is there any way of storing audio- / video-elements in the browser cache in Safari in iOS?
Hi there,
I'm desperatly trying to find a solution for a web application that has to run on an iOS-Safari (e.g. on iPad, iPad2 and iPhone 4):
It's a web-application I wrote some time ago which lets the user search for and listen to short music samples (MP3s, all from ~100 kB to ~1.5 MB). The audio player is Flash-based, so it doesn't work on iOS-devices at the moment and I'll have to implement an alternative either in HTML 5 or with a "direct" QuickTime-object.
Both my HTML 5- and QuickTime-alternatives for iOS-devices work fine so far, but there's one major problem I can't find a solution to:
Unlike Flash and most HTML 5-capable browsers on Windows Safari on my iPad 2 won't store the audiofiles in the browsercache after loading and playing them - neither with HTML 5 audio-tags nor with a QuickTime-Object. Every time I load an audio file for playback from the server (with JavaScript-Commands, so without changing or reloading the whole page) it's downloaded again completely.
If a user listens to sample A and then to sample B, Safari forgot about having played sample A and downloads the whole MP3 again if I like to listen to it again. On a mobile device with a potentially narrow bandwith this behaviour is out of the question.
Is there a way of storing downloaded audiofiles opened by HTML 5 or QuickTime in Safari's cache so it remembers already having downloaded them - like it caches usual "web-files" like HTML, CSS or JPEG-images, or like Flash stores such objects in its local cache?
The Application Cache with a manifest-file is not an option - this only seems to work if the browser is offline, for example if the iOS-device is in "Airplane"-Mode.Yes, I watched it. It contains interesting stuff I have to admit I didn't know yet, but unfortunately I still can't find a solution to my problem:
My first attempt was trying to use the Application Cache with a manifest file - although this is not really the intended purpose for my application... I don't have a static set of files that I want to have cached or "available offline" - I just want to cache MP3s which the user has played yet.
It should be possible to use a "dynamic manifest": One that is parsed by the Apache PHP module and listing the files played so far from a PHP session - something like this:
<?php
session_start();
header("Content-Type: text/cache-manifest, charset=UTF-8");
echo "CACHE MANIFEST\n";
foreach($_SESSION['playedSongs'] as $song)
echo $song."\n";
?>
So whenever a song is loaded / played, I could access the PHP session with AJAX, insert the filename of the played file and manually update the manifest by calling window.applicationCache.update().
There are two problems with this:
First of all: It doesn't work. And I didn't even get to the point of trying to use a dynamic manifest:
<!DOCTYPE html>
<html manifest="cache.manifest">
<head>
<title>Test</title>
<script type="text/javascript">
function playStuff(id)
if(id == 1)
window.document.getElementById("audio").innerHTML = '<audio controls preload="automatic" autobuffer><source src="song01.mp3" type="audio/mp3" /></audio>';
else if(id == 2)
window.document.getElementById("audio").innerHTML = '<audio controls preload="automatic" autobuffer><source src="song02.mp3" type="audio/mp3" /></audio>';
</script>
</head>
<body>
<div id="audio"></div><br />
<br />
<input type="button" value="playStuff(1)" onclick="playStuff(1)" />
<input type="button" value="playStuff(2)" onclick="playStuff(2)" />
</body>
</html>
The cache.manifest looks like this:
CACHE MANIFEST
song01.mp3
song02.mp3
and is properly returned from Apache as "text/cache-manifest" by adding
AddType text/cache-manifest manifest
to the .htaccess of this directory.
The Apache-logs clearly show that the Safari (respectively "AppleCoreMedia") doesn't care about the application cache when it comes to audio-files:
Safari itself seems to acknowledge the manifest and indeed preload the files:
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/index2.html HTTP/1.1" 200 2619 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/cache.manifest HTTP/1.1" 200 79 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/cache.manifest?%3E HTTP/1.1" 200 79 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/song02.mp3 HTTP/1.1" 200 120525 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
192.168.0.40 - - [23/Jul/2011:12:45:46 +0200] "GET /websql/song01.mp3 HTTP/1.1" 200 120525 "-" "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; de-de) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5"
Up to this point I did nothing but opening my test-application in Safari.
Playing song01.mp3:
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 2 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:25 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:29 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:47:29 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Playing song2.mp3:
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 2 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:04 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:05 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:05 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Playing song1.mp3 again:
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:38 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:40 +0200] "GET /websql/song01.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:48:40 +0200] "GET /websql/song01.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Playing song2.mp3 again:
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:12 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:13 +0200] "GET /websql/song02.mp3 HTTP/1.1" 304 - "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
192.168.0.40 - - [23/Jul/2011:12:49:13 +0200] "GET /websql/song02.mp3 HTTP/1.1" 206 120525 "-" "AppleCoreMedia/1.0.0.8J2 (iPad; U; CPU OS 4_3_3 like Mac OS X; de_de)"
Every file is downloaded again completely when playing it. So "AppleCoreMedia" (whatever this may be exactly, the QuickTime-plugin that is triggered by the HTML 5 audio-element I suppose?) either doesn't have access to the Application Cache or simply just doesn't realize the files in it. So if I switch my iPad to "Airplane Mode" now, the Safari is unable to access / load / play the files.
I also tried using a QuickTime-object instead of an HTML 5 audio-tag (as far as I know HTML 5 audio and video in Safari always use QuickTime?) and controlling it with something like:
document.movie1.SetURL('song02.mp3');
Nothing changes, it's just like using HTML 5 audio and everything gets downloaded again when loading/playing it.
And even if this would work there'd still be a problem:
To properly implement that I would have to load the MP3-file in the Application Cache before playing it. When doing this it seems impossible to show a "real" progress: The ProgressEvent that is fired from the Application Cache after updating it doesn't seem to provide any information about data loaded so far and the complete size of a file. It's just "File 1 from 2" and so on, and not a "real" progress where I could determine something like: "100 kB of 1.2 MB loaded" as I can with the audio-element.
All the other storage-approaches like Web SQL / Web Database or Local Storage are no help either:
I don't see any way of getting the MP3 data into Local Storage or Web Database or getting it out again to play it. The HTML 5 Canvas-element has a toDataURL()-function to produce a Base64-encoded representation and use it for storage - the Audio-element doesn't seem to have anything like this.
My last really "dirty" approach was trying to load "manually" Base64-encoded-MP3s with a combination of AJAX and PHP: A PHP-script outputs a Base64-representation of a MP3-file and is loaded by AJAX, so I could store the Base64-representation e.g. as Local Storage or in Web Database:
<?php
$infile = 'song01.mp3';
$contents = file_get_contents($infile);
$base64 = base64_encode($contents);
$audio = 'data:audio/mp3;base64,'.$base64.'';
echo $audio;
?>
I tried using the resulting AJAX responseText as the source-argument in an audio-source-tag. Suprise: It doesn't work in Safari on my iPad 2, the player just fails to load the "file", although this works fine in Chrome on Windows. Possibly a size limitation for Base64-URIs on Safari / iOS.
And again: Even if this was working in iOS/Safari I don't know of a way to determine a real progress from an AJAX-query...
The last thing I could think of is not replacing the audio- or source-tags when loading a song but leaving them in the DOM-structure, check if it's already there when a song is loaded and just add a new audio-tag if a song hasn't been loaded yet.
This solution would be my last resort: I'd have to rewrite nearly the whole application to completely operate on JavaScript / AJAX to stay on one site in the browser - else the "cached" audio data would be lost again when changing to another site in Safari.
Furthermore I think there'll be a small cache limit somewhere when doing this?
Any ideas? -
Is there a way to force audio out through the Thunderbolt port?
I am trying to connect a 15" MacBook Pro to an InFocus 3916 using a Mini DisplayPort to HDMI adapter.
I know that the computer, adapters, and cables I am using support audio over HDMI.
I have tested 4 separate adapters, 2 cables, and 2 computers, all of them work when hooked up to a Samsung HD TV.
I know the Projector supports audio over HDMI, because I plugged a Apple TV into the projector using the same cable, and it worked fine.
When I am using the Samsung HD TV: System Preferences->Sound->Output shows "Samsung" in the choices of outputs.
When I try using any of the three Infocus Projectors, it only shows the internal audio.
I have tried resetting the PRAM, and SMC. I have tried plugging in an audio cable to my computer to force a refresh of the Sound Preference Pane... I have tried turning on and off the projector.
At this point I am trying to find a way to force Mac OS X to recognize the Projector as an audio output... Or at least to force the computer to think there is something there, so that it will push sound out the thunderbolt port.
MBP Hardware Configuration:
15" MacBook Pro, Late 2011
2.2 GHz Intel Core i7
AMD Radeon HD 6750M 512 MB
OS X Lion 10.7.2
Latest updates except Apple Remote Desktop 3.5.1mjs1138 wrote:
endasil, Thanks for the reply. I'm currenlty running the program from within the NetBeans IDE. It is the output displayed by in NetBeans "output" that I'm looking at.
--- MikeI don't use Netbeans, but I would guess that it too pipes Standard Out and Standard Error to the same console. You didn't address my comment. Are you printing to System.err as well? This happens implicitly if you use Exception.printStackTrace(), for example.
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