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iPhone, iPod compression

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Chris Blair
iPhone, iPod compression
on Sep 26, 2009 at 4:49:49 pm

We've been doing a lot more ipod/iphone compression for web sites and we've run into a problem where H264 files using either the m4v or mp4 extensions won't play (via a web link) on the iphone via safari, but if you simply change the extension to .mov on the file, iphone's play them fine.

We have the correct mime types setup on the various webservers so that's not the problem, and the mp4/m4v extensions play fine from any desktop or laptop computer browser (including safari on the Mac).

The encoding is correct because we're using iPhone or iPod presets from encoding apps and the exact same file plays fine by just changing the extension to .mov. We've tried using different encoding apps, including Quicktime, Handbrake, MPEG Streamclip, Carbon Coder and Procoder, and we cannot get the m4v or mp4 files to play from these various websites on iPhones.

We've checked all the preset specs and the settings on the resulting files against Apple's specs for both devices, which are found here:

http://support.apple.com/kb/SP2

I've found numerous posts on various Mac forums with others having the same problems since the iPhone update to version 3.x this summer, and there doesn't seem to be a definitive cause or solution. Many, if not all of these video files worked before this update. We only noticed it when my wife recently bought an iPhone and I went to show her a video file from our website and we got the error message "Cannot Play Movie, movie could not be played" within the mobile safari browser.

Ultimately, it's not a huge deal since they work by simply changing the extension. But it's a pain to go back and change extensions and recode links in websites.

Anyone on here have a solution for this issue?

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com


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Daniel Low
Re: iPhone, iPod compression
on Sep 28, 2009 at 1:36:35 pm

This may help?:

http://provideocoalition.com/index.php/webvideo/story/encoding_web_video_in...



__________________________________________________________________
"There's no chance that the iPhone is going to get any significant market share. No chance."

Steve Ballmer To USA Today


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Chris Blair
Re: iPhone, iPod compression
on Sep 28, 2009 at 6:28:02 pm

Something has changed since that article because we're finding the reverse is true. Since the iPhone OS update to version 3.x, files encoded with the mp4 extension are the least likely to play now.

We've spent hours testing, and we've gotten mov files to play consistently coming out of the encoders. But with the exact same settings, the mp4 files won't play, and most of the m4v's won't either. In fact, the mp4 files show up as unrecognized files to the iPhone safari browswer.

I've found a few other forum posts from web folks who've experienced the same issue, and found a post on Apple's iPhone discussion group that indicated it's a bug in the new iPhone OS update. According to that post, the problem has brought a few iPhone video sharing sites to their knees.

Very odd since all of those file would play fine before.

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com


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Andrew Saliga
Re: iPhone, iPod compression
on Sep 29, 2009 at 3:07:31 pm

Worth knowing Chris. Thanks for the link Daniel.

-Andrew Saliga

Steelehouse Productions
http://www.steelehouse.com


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