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The big question for anyone considering purchasing a video ipod is, 'what sort of videos can I watch on it?' The answer is that just about any video can be converted into an ipod-compatable format, but there are also a growing number of videos being released specifically for the video ipod. According to the Apple website, the new video iPod can screen video that comes in either H.264 or MPEG-4 formats. It has all the things you can get with advanced mobiles like o2 mobile phones. It does have different specifications though. To be more exact, the specifications are as follows: * H.264 video: up to 768 Kbps, 320 x 240, 30 frames per sec, Baseline Profile up to Level 1.3 with AAC-LC up to 160 Kbps, 48 Khz, stereo audio in .m4v, .mp4, and .mov file formats. * MPEG-4 video: up to 2.5 mbps, 480 x 480, 30 frames per sec, Simple Profile with AAC-LC up to 160 Kbps, 48 Khz, stereo audio in .m4v, .mp4, and .mov file formats. For those unfamiliar with the specifications of digital video, this probably all sound a bit confusing, but you need not be too concerned, as you only really need to remember a few of these numbers and specifications in order to get the most out of your new iPod. We'll start with H.264 video. The highest video bitrate with the H.264 codec is 768 kilobits per second. The biggest picture size for your H.264 movie is 320 pixels wide by 240 pixels high, which is incidentally the exact dimension of your iPod’s screen. Your iPod can play H.364 video at framerates up to 30 frames per second. Most iPod applications do their encoding in accordance with this profile. As to the audio, it needs to be encoded as AAC audio up to 160 Kbps, 48 KHz, and can be in either stereo or mono. Note that the audio format is the same for both QuickTime movie and MPEG-4 formats. The other video option you have is the MPEG-4 video, which supports a much higher bitrate than H.264 video – 2500 kilobits per second to be exact! Using higher bitrates naturally also creates much larger files, which means that you end up with less space for the storage of additional songs and movies. It comes down to a decision of trading off quality over quantity, though obviously how critical this is depends on the storage capacity of your unit. The larger picture size for the MPEG-4 video is 480 pixels wide by 480 pixels high – three times as many pixels than your iPod’s screen in capable of displaying. Your iPod will shrink the picture proportionally so that everything fits on the screen. Again, the iPod can play videos up to 30 frames per second and your audio and file format options are the same as H.264 video. So the important question that remains is which format is Better – H.264 or MPEG-4? In truth, it's a tough question, as each format has its ups and downs. Many would argue that the H.264 format is better because it offers a high quality video at a file size that is much smaller compared to MPEG-4, and when it comes to picture quality both formats are indeed comparable, especially when encoded at the higher supported video settings. As for the speed of encoding however, most people agree that H.264 video takes longer than standard MPEG-4. If we take a two-hour movie, for example, when you convert that to iPod using H.264 codec, the process can take considerably longer (especially with QuickTime Pro’s haphazard Export function: 'Movie to iPod video'). In short, which ever format you decide on, you'll need to take into consideration a number of factors, including the number of movies and songs you are likely to want to store on your video ipod, the projected size of the individual files, the actual storage capacity of your video ipod, and your patience when it comes to the encoding process. In truth though, deciding on an appropriate video format for your ipod is one of the more pleasant decisions that need to be made in life, and shouldn't prove too much of a stress. This is just an intro click here for the complete ipod article
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