SAN FRANCISCO (Dow Jones)- Adobe Systems Inc.'s (ADBE) popular media player for cellphones simply isn't good enough for Apple Inc.'s (AAPL) iPhone, Apple Chief Executive Steve Jobs said Tuesday in the most substantive comments to date about why the iPhone can't now be used to view a large percentage of videos on the Internet. Since its debut in June, the mobile Web browser inside the combo phone and digital media player hasn't been compatible with online videos based on Flash Player, an Adobe-made media player used to view most Internet videos. Web-based videos for the iPhone have to be specially formatted to a file type that Apple endorses. Google Inc.'s (GOOG) YouTube is the only video provider now doing this, and only a handful of videos are available. As Jobs put it Tuesday, Apple's iPhone, with all its cutting-edge mobile Internet trickery, needs something much better than the current Flash player that Adobe makes for cellphones. The Flash Player option that fits the bill is made for devices like laptops that are larger than the iPhone; as a consequence, it performs too slowly on the iPhone, he said. "There's this missing product in the middle," Jobs said. An Adobe spokesman didn't respond to a message seeking comment. Adobe's patience appears to be wearing thin. "No one aside from [Apple Chief Executive] Steve Jobs has any idea if or when it's coming," Ryan Stewart, Adobe's chief spokesman for its Internet-based applications, wrote on his blog last month. "Everyone I talk to doesn't know anything." Based on Jobs' comments, it appears developers and investors will be disappointed Thursday, when some believed Apple would release iPhone software tools that could be used to add Flash to the iPhone. Jobs' comments will only raise the volume on the issue and put even more strain on the companies' relationship. Adobe, which had about $3.2 billion in sales in 2007, hasn't disclosed how much of its business comes from Apple. Apple has a small share of the world-wide personal-computer market, however, so it isn't Adobe's biggest client. If the iPhone adds Flash, it could lift the pressure slightly on Adobe's stock, down around 19% for the year. Apple shares rose 2.4%, or $2.89, to $124.62 during Tuesday trading. Adobe shares traded 21 cents higher Tuesday to $33.07. The companies have a history of strained relations. Several years ago, Adobe dropped support for Apple's Macintosh computers and then introduced other software products that were only compatible with Microsoft Corp. (MSFT) software. They resolved their differences later on and were compatible again. Then, Apple made some product changes affecting the distribution of Adobe's software products. With the continuing tensions over the iPhone, it appears the two may be drifting further apart. "They've been drifting apart for years; Apple can make do, but the question is really what about Adobe?" said Rick Chapman, editor of software-industry newsletter Softletter.