Well this is for bluray / 1080p. This is the max a bluray can do, but as someone else suggested the average bluray might be more like 30 Mbps.
The iPhone 4 is only 720p, 1080p is a bit more than 2x as big.
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iPhone 4 HD Video File Size
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Well this is for bluray / 1080p. This is the max a bluray can do, but as someone else suggested the average bluray might be more like 30 Mbps.
The iPhone 4 is only 720p, 1080p is a bit more than 2x as big.
In a typical Xacti/Flip HD type video camera 8GB will yield about 1hr. 30min @ 720/30, 9mbps. I can't imagine the iPhone video will be less compressed than a Xacti so seems to be a good rule of thumb.
Also unknown is if the iPhone 4 has a limit to how much video can be recorded in a single session. For example many cameras w/ HD video capability are limited to 5 min or so of continuous shooting -- even my $800 Nikon D90. If that holds w/ the iPhone then its not really a video camera replacement, and more of a video camera of last resort, or convenience. Unfortunately Apple tends to withhold the "oh btw, sorry but..." details until release.
Also unknown is if the iPhone 4 has a limit to how much video can be recorded in a single session. For example many cameras w/ HD video capability are limited to 5 min or so of continuous shooting -- even my $800 Nikon D90. If that holds w/ the iPhone then its not really a video camera replacement, and more of a video camera of last resort, or convenience. Unfortunately Apple tends to withhold the "oh btw, sorry but..." details until release.
BR movies clock in around 3 MB/s for the length of a movie.
A BR movie is high quality, top end encoding. It's basically the pinnacle of what everyone can expect from a movie. Lopping off about 90% of the bit rate and you can still get VERY exceptional quality from a 720p movie. So...
I invite you to watch that movie I linked above on youtube. That is a pretty high quality movie too, plus I can tell you that that movie is 210 MB and 14:11 long. That makes it 1/12 the bitrate of a BR movie, still very high quality and very very acceptable for video shot from a mobile phone.
It would be so much easier to just compare it to video that is in the same resolution. Find a good 720p movie, get it's bitrate.
Or wait for some videos to be leaked out!
Sample video comes out to 83.4 MB / min. So it seems iPhone 4 does step up the compression ratio closer to 60:1.
http://whenwillapple.com/blog/2010/...es-confirmed-gets-upgraded-video-compression/
Yeah. Every video will be a bit different depending on what is being shot, how much stuff is moving around, etc. but I think 5GB / hour is a good estimate based of this video sample.
Check the description for this iPhone 4 native video to get an idea of file size. 9 seconds, 12.5mb
http://www.youtube.com/watch?v=KDXIll1Rt34
http://www.youtube.com/watch?v=KDXIll1Rt34
This is the same video I downloaded and checked out to come up with my 83.4 MB / min figure.
I downloaded the original .mov file, not the YouTube version and it shows the size as 12.5 MB (13,151,596 bytes).
I was talking with an Apple.com rep the other day on the phone (she was from the tech dept that they moved into sales for the day to handle preorders.) We were talking about the new phone while trying to figure out a mess-up on my pre-orders/reservation status and we got on the topic of with the HD video why someone wouldn't go for the 32GB model.
Anyways....she said that 1 min of video comes out to around 80 MB. Which means a little over 10 minutes would be 1GB. If you plan on shooting any video it would be safer to go with the 32GB model.
I downloaded the native .mov video and it was 10 sec 13.2 MB.
So that would mean 1 minute of video will be roughly 79.2 MB
1 hour of video will be roughly 4.75 GB.
It looks like the 32 GB is the way to go.
So that would mean 1 minute of video will be roughly 79.2 MB
1 hour of video will be roughly 4.75 GB.
It looks like the 32 GB is the way to go.
I must say, the quality of the sample clip is pretty spectacular. And that bit rate is pretty darn high, especially for a phone. 1.25MB/s for a video on a phone? Yikes, looks like my guess is a little off then (from above 
).
Well, looks like I won't be disappointed about this phone replacing my rarely used camera.
).Well, looks like I won't be disappointed about this phone replacing my rarely used camera.
Damn everybody here talking megabytes and gigabytes, you guys are really convincing me to get the 32GB model lol, I never thought an HD movie would take up that space...20 min video is over 1Gb wow than I really need the 32GB model.
When you're talking HD content, you need to be talking GBs. (MBs is just foolish.) There are some confusion on HD content here and Apple's compressions, etc. So let's just clear a few things up using Apple product examples:
- Apple TV can handle a maximum of 720p. It cannot play videos any larger than 1280x720. This resolution is 720p, or HD.
- The maximum bitrate AppleTV can handle (on average) is 5MB/s. Yes, 5 MB/s for 720p. 1080p would be even larger, and to be honest, 720p can be too.
- Basic math tells us a 1.5 hour film in 720p for Apple TV comes in at around 3-4GBs. (And 1080p around 7 or 8GBs. And this is a really lossy conversion we're talking about here, not "true HD".)
So applying this across to Apple's HD video claim for the new iPhone, while I wouldn't expect the crazy quality of 5MB/s, you can expect a steep file size. I would expect to see around 100MB/min, or around 1.5mb/s. Seems reasonable to me. That won't be exact, but likely a good ballpark.
tl;dr: If you plan on shooting much video, get a 32GB iPhone. You'll want it.
if you get a 32 GB you'll be able to shoot 5 hours of video and still have 7-8 GB for music and apps.
that's without syncing to take videos off the phone for more space.
that's without syncing to take videos off the phone for more space.