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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

"new Ipad" (3) , how do I get highest quality demo video on it ?

Justin O'Neill said:
Command click on the file in the Dropbox folder and then select the dropbox menu and copy public link. The file has to be in your "public" folder.
Click to expand...

Thank you Justin.

2560p 550MB file is stil loading.
I suspect that DropBox is converting it to .mov file since it is mp4 file.
Maybe I should use Goodreader to play it.

Justin, did you try to play TimeScapes 2560 file in Goodreader?
 
Yes, it will be, I just wanted to know if it loads at original resollution or it is transcoded to ?? what 2048 or 1980?
Also it is mp4 file not mov.

I still can't load it from my dropbox, showing loading...... since one hour or so.

Could you try to load it?

Justin O'Neill said:
I didn't because I had to lower my own 2048 footage to 60% quality...I'm sure 2560 will be at best super stuttery.
Click to expand...
 
The ultimate would be to load and play a 3K or 4K file and have it scale it to fit the 2K screen. Then, be able to pinch-zoom in and see the full 1:1 sized pixels and pan around it to see all the detail that is not visible when it's at the 2K size. You would see a 2K window in the 4K media, for example.
 
So 2560p file that is actually 1440p file is playing on iPad3 without the video, just audio.
It is mp4 file.
Exporting it to 2048 mov plays both video and audio.
I used mp4 codec in mov file.

I can try to export it to mp4 "pass through" and reduce size to 2048 but if it will not play it will be just the build in playear in DropBox I think.

So forget to play anything bigger than 2048 for now. Will need custom player. (two weekends job for good iPad apps developer)
That is fine with me, screen is 2048 but it would be good to have option to zoom out to 1:1 for details.
 
Here is another one for you guys to check out. I rendered this one at 2k 16x9 or 2048x1152. Works great on my iPad! http://dl.dropbox.com/u/5673574/retina-pan-16x9.mov

A little compression weirdness in the shadows though...this one might look better at 1920 with a super high bitrate.
 
Justin, plays perfect on my iPod3, very smooth even when you pan.
12Mbits/sec stream.

So looks like we can go higher with the data rate.

Can you export it again to 2050 or 2560 horizontal?
I want to see if more than 2048 pixels will not play like the other experiment I did.
You can also increase data rate to 15Mbit/sec if you want.
 
Justin O'Neill said:
I will try rendering at 2560 shortly. Here is one of my tests at 75% quality: http://dl.dropbox.com/u/5673574/retinga-16x9-75.mov

I will switch to Mbit/sec now that I am getting the hang of this.
Click to expand...

Justin, I don't know how you decoded it but it peaks to 88MBits/sec.
I don't know if I am getting all the frames since it is too short clip.
Can you do the same but bit longer including pan sequence please.

Give me 100-150 MB of this file at the same quality (75% you said?)
 
Andrew M. said:
Playing it perfect, no drop frames 14MBits/sec stream even when upscalled to 2048 or original pixels count.
Sound is good too.
Click to expand...

Well, that's impressive. Therefore, the new iPad is capable of playing H.264 with an LPCM audio track. That's LPCM!

Wow.


EDIT:
By the way Andrew, what app did you use to play the file?
 
Last edited:
I use the player that DropBox is invoking to play.
Since DropBox is dated Nov, 2011 Ver 1.4.6 I don't think the player is part of the DropBox.
DropBox is probably using run command for specific extenssion of the file .mov or .mp4 and I think iPad does the rest.
But I have seen all the overimposed lines on the sample above here so if it is standard player of iPad3 the player must be supporting 2048 mov files?
 
Justin, it plays perfectly smooth at full 32MBits/sec.
I use DropBox to invoke the file for playing and what I am reading on the net DB is using iPad3 (or any other default iPad) .mov player.
I just wonder if iPad3 when playing the video file with the default (resident) mov player is not converting your MPEG4 to some other format that is more iPad GPU friendly format.
Whatever it is doing we should not be concern since we know that iPad3 plays all the pixels when width is set to 2048.
We also see that at 32MBs it can play/convert/decode/whatever at real time and I do not see any visually noticeable dropped frames during the pan.
Also I did try my old laptop Dell XPS with GeForce 8800M GTX to play your 32MBsec file and laptop is not playing as smooth (your 32MBits/sec file) as iPad3 when pan is at the mid point to the left, I see noticable few dropped frames on my old Dell.
As far as I remember 8800M GTX is playing mov files with acceptable quality up to 50MBsec and without any dropped frames up to 15MBsec.

So iPad 3 when it comes to playing video .mov files is better than 8800M on dual core 2.8G Intel X7900 based Dell computer and Dell screen is only 1980 not 2048 :-)
Not bad at all.

Do you want to push farther to 50MBsec?

I have all aps closed on my iPad3 including cell wireless that I disabled. Only WiFi is enabled.
64GB memory and I wait till all the files are loaded in before playing the video file.
 
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