synced video from itunes doesnt work

[trynix]

Hi all,

I have just downloaded some iTunes university lectures onto my macbook, just as a sample, one of these lectures has the following specs:

Kind: MPEG-4
Codec: H.264
Dimensions: 320x240
Total bitrate: 416kbps
Channels: stereo
Profile Low Complexity
Bitrate: 99kbps
Size: 129.5


I synced the video onto my iphone 3g, and now when I play it on my iphone I only see a blank screen and the audio of the lecture plays.

It plays fine on my macbook though, and just to clarify, those lectures are considered as Movies on my iTunes/iPhone.

Can anyone help me please on that.

 

[trynix]

In order to stress the issue a bit more, I am now giving more details:

Programming paradigm (lect 1 for example): http://deimos3.apple.com/WebObjects...617348111.01617348114.1607366371?i=2093660149

Programming methodology(lect 1 for example): http://deimos3.apple.com/WebObjects...615329425.01615329428.1611703847?i=1348717488

The only differences between them are size bitrate and total bitrate.

* Both are:

MPEG-4 Video files (H.264)
320x240

* Programming paradigm (plays ok):

Size: 53.4 MB
Bit rate: 100 kbps
Total bit rate: 424 kbps

* Programming methodology (only audio plays, screen stays blank):

Size: 160.2 MB
Bit rate: 125 kbps
Total bit rate: 446 kbps

* Official iphone specs:

Baseline Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4 and .mov file formats; H.264 video, up to 768 Kbps, 320 by 240 pixels, 30 frames per second.

If we see the official iphone specs, then both the videos are within the playable range. But for some reason, the paradigms video plays well, while methodology one only plays sound but no video (blank screen).

Can anyone guide me on why this is happening? and how to fix it?

PS: iPhone 3G

 

[9822679]

i had a similar problem with some of my lectures as well

the first slide will show, but only the audio will play


to be fair i think researching and solving this problem is not worth the time and effort ( just watch it on a computer)


if you can fix the problem, send me a PM