Mailing List Archive: MythTV: Dev

No video in OS X frontend

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msherman at dsbox

Jul 21, 2005, 7:19 PM

Post #1 of 3 (2352 views)
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No video in OS X frontend

OS X 10.4.2 (Tiger), current SVN pull (10pm EDT Thursday). When
watching live TV or recordings, I get audio but black for video.
This is on the console:

2005-07-21 22:12:54.513 mythfrontend[751] CFLog (21): Error loading /
System/Library/Components/IOQTComponents.component/Contents/MacOS/
IOQTComponents: error code 4, error number 0 (Symbol not found:
__cg_png_destroy_write_struct
Referenced from: /System/Library/Frameworks/
ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/
Versions/A/ImageIO
Expected in: /usr/local/lib/libPng.dylib
)
DecompressSequenceFrameWhen failed

I just upgraded to qt 3.3.4, but it was also happening with 3.3.3.
Anyone else seeing this?

-Mike

msherman at dsbox

Jul 24, 2005, 6:05 PM

Post #2 of 3 (2250 views)
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RE: No video in OS X frontend [In reply to]

As a follow-up, I've solved this no-video issue with OS X Tiger. If
anyone else has this issue, I'll just note this for the archives.
The error is caused by new png libraries provided by the new 10.4
Tiger release. If you have 10.4, you need to get rid of the libpng
libraries you may have compiled and installed into /usr/local/lib/.
Just remove those and it'll use the new system default libs, and
it'll work just fine.

nigel at ind

Jul 24, 2005, 6:42 PM

Post #3 of 3 (2247 views)
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Re: RE: No video in OS X frontend [In reply to]

> If you have 10.4, you need to get rid of the libpng libraries you may
> have compiled and installed into /usr/local/lib/. Just remove those
> and it'll use the new system default libs, and it'll work just fine.

Good find, Michael.

So, what you are saying is that QuickTime is trying to use
/usr/local/lib/libpng.dylib instead of the Apple one? Interesting.
I wonder if a custom DYLD_LIBRARY_PATH (either in the env,
or "compiled into" the binary) would be a better workaround?

--
Nigel Pearson, nigel [at] ind | "In this city I confess
Telstra BI&D, Sydney, Australia | god is mammon, more is less
Office: 8255 4222 Fax: 8255 3153 | off like lemmings at the gun
Mobile: 0408 664435 Home: 9792 6998 | I know better, still I run"

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