Just wondering...else I have to convert to 480p
Yes it supports 720p (and 1080p) movies.
you guys have to always remember that what it supports and what it can do flawlessly are two separate things....
720p videos films are playable but not the smoothest.
actually,For me,720p and 1080p vids played quite smoothly (maybe a tad slower than my iphone4 but nothing notable really)
Interesting, I didn't even try 720p. Good to know it works, but really it generally would be worth your time to convert. Huge waste of space if you don't plan on deleting it right after viewing.
Sent from my PI39100 using XDA Windows Phone 7 App
link68759 said:
Interesting, I didn't even try 720p. Good to know it works, but really it generally would be worth your time to convert. Huge waste of space if you don't plan on deleting it right after viewing.
Sent from my PI39100 using XDA Windows Phone 7 App
Click to expand...
Click to collapse
Yup I had to convert a 2.5 gb vid from avi to mp4 and it was about 3.7gb
VeryCoolAlan said:
Yup I had to convert a 2.5 gb vid from avi to mp4 and it was about 3.7gb
Click to expand...
Click to collapse
I assume you used Zune to convert it, if the end file ended up being bigger than the original.
A properly transcoded video would be significantly smaller: a 720p video has 921600 pixels per frame, as opposed to the resolution of our Titans; 480x800. A wvga video only needs 384000 pixels per frame. Therefore a 720p video is roughly 2.4x larger than it needs to be as our screens cannot display pixels it doesn't have (and that's not even taking bit rate into account). The quality will actually be slightly worse on a 720p video because it will have to be scaled down to play on the screen, whereas a properly transcoded video would be 1:1 with the pixels on the screen.
I mentioned bit rate; I don't really know what a good marker for bit rate is, but when transcoding to a smaller resolution, you don't want to keep the original bit rate: that has to go down too. Bit rate plays into file size significantly, so in reality any 720p video is much more than 2.4x bigger than it needs to be.
I guess one of these days I'll play around with a transcoder and make a thread about how to properly convert a video for WP7.
Related
My understanding is that the XDA2 BackPack has a TV output of 640x480 pixels, which compared to full PAL resolution of 720x576 (or 720x480 NTSC) isn't that far off.
I can encode a full length DivX movie from a DVD at 640x480 and it will fix on my soon to arrive 1GB Secure Digital card quite easily at superb quality. What I'm thinking is, will I be able to output from the XDA2, using the backpack, to the TV, and play a 640x480 DivX movie streaming from the XDA2? Or is the TV output restricted to applications that support it only? (Such as Powerpoint, etc)
Are you sure the XDA II can play a 640x480 movie smoothly?
Not at all; after creating this topic I've read multiple times that the XDA2 outputs 2-5fps via the backpack - I guess it only needs to create an output at that frequency when working with powerpoint presentations.
A little disappointing for a 400MHz processor, but I suppose it all comes down to the GPU, or lack of...
ya... I was looking at some benchmarks for the h6300 which included the XDA II; needless to say, the XDA II didn't do too well in the graphics benchmarks
Url ?
I think those graphic benchmarks focus on applications or games, otherwise I can't explain why the xda II is always getting bad marks. We shouldn't forget that the ati imageon chip is designed exactly for playing mpeg4, and if you got players like BetaPlayer you can see the difference when you switch the ati support on and off.
If the video is not much larger than 320x240, it can be downsized and is still running smoothly on the display. Sadly you have to reencode your movies, but it only takes one hour or so in virtual dub.
Now I think your 1 GB storage card won't be very useful when it comes to movies...
Another thing, I'm not entirely sure but I suspect the speed of the sd slot isn't fast enough to play movies beyond 800 kBit or so. So even if the cpu/gpu was fast enough, there would be no way to play most movies with variable bitrate, occasionally exceeding lets say 1200 kbit.
For those reasons, I think even if the backpack did it, I don't think you could watch movies on a big screen.
However, it's disappointing if even the 320x240 don't work, which run smoothly on the ppc display and are comparable to vhs quality. I can't test it but I get this impression from what I read here.
so is the backpack not a good investment if i wana play some videos on a tv/monitor? dose wmv make any diffrence? and would it work better on a xda 3? sounds silly but @ £60+ i wana know what ill be getting.
xdaIIi
So if the Vibrant is only 800X480, why does a 720p movie look better than a 480 movie, it seems like the max is 480..... Also, if the Iphone 4 has 960x640, even though it looks amazing, way better than any android, it isnt actually playing a 720p video in full either is it? yes i realize how stupid that question seems to many of you. I couldnt figure out how to search google for the question. So enlighten me if you can. After you give me crap for not searching of course...thanks
DMaverick50 said:
So if the Vibrant is only 800X480, why does a 720p movie look better than a 480 movie, it seems like the max is 480..... Also, if the Iphone 4 has 960x640, even though it looks amazing, way better than any android, it isnt actually playing a 720p video in full either is it? yes i realize how stupid that question seems to many of you. I couldnt figure out how to search google for the question. So enlighten me if you can. After you give me crap for not searching of course...thanks
Click to expand...
Click to collapse
What is the resolution of the movie you are comparing it to? What is the format of the movie? How was it compressed? All of this and more affects the resolution of the video. If you have a 720p movie, it my be down-converted to 480 on playback, but because it was compressed at a higher quality (and maybe in a less lossy format), it's going to look better than a movie compressed in standard-definition (and more than likely at lower data rates).
because 720 is bigger than 480, the image size is bigger and usually has a higher bitrate too than a regular 480 video, so if 720 is played on anything smaller than a 720display, it gets resized (downsized) to fit the screen (without any quality loss), in this case a 480 screen. So all those pixels on the 720 video get pushed closer together thus showing more detail on the 480 screen.
a 480 video usually looks just fine on a 480 display, but since a 720 video is bigger and was meant for higher resolution screens, it has a higher bitrate which makes it store more detail than a 480 video, that's why it looks better
thanks for the replies, that makes perfect sense. if its 720 pixels i didnt understand how they could all be on a screen capable of only 480 but i guess compressing the video maintains the quality.
And to answer the questions, i just dl a movie, and drag and drop to my vibrant through doubletwist which takes care of the conversion. Although ive noticed none of the videos i download look nearly as good as default Avatar. I dl 1080/720 movies and they always have the very pronounced, large pixels when there is action and bright colors. But Avatar looks great so i guess maybe i could use something other than doubletwist and get a better quality conversion? Because the Vibrant is clearly capable of displaying fast action and huge varieties of colors like in Avatar
That said im ready for HTC/Moto/Samsung to start popping out some high res displays to rival the I4. The Vibrant has a nice screen but put it next to the damn I4 and it looks downright dull. I guess that tiny 3.5" screen next to the Vibrant's perfectly sized 4" display benefits the I4 visually as well...
DMaverick50 said:
thanks for the replies, that makes perfect sense. if its 720 pixels i didnt understand how they could all be on a screen capable of only 480 but i guess compressing the video maintains the quality.
And to answer the questions, i just dl a movie, and drag and drop to my vibrant through doubletwist which takes care of the conversion. Although ive noticed none of the videos i download look nearly as good as default Avatar. I dl 1080/720 movies and they always have the very pronounced, large pixels when there is action and bright colors. But Avatar looks great so i guess maybe i could use something other than doubletwist and get a better quality conversion? Because the Vibrant is clearly capable of displaying fast action and huge varieties of colors like in Avatar
That said im ready for HTC/Moto/Samsung to start popping out some high res displays to rival the I4. The Vibrant has a nice screen but put it next to the damn I4 and it looks downright dull. I guess that tiny 3.5" screen next to the Vibrant's perfectly sized 4" display benefits the I4 visually as well...
Click to expand...
Click to collapse
don't use doubletwist to put videos on your phone if they are already compatible with the vibrant, like a 720 video, vibrant can handle that..and all I explained was about the vibrant playing back the 720 video without conversion (just dragging and dropping the 720 video to the phone)
you have been playing the wrong movies or using the wrong convesion settings cause my movies look amazing, up to par and sometimes even better than the iphone 4. Have a look at one of my threads and download the video i uploaded (just drag and drop to phone don't use doubletwist or any other conversion method) and you will see what the vibrant screen is capable of.
thread: http://forum.xda-developers.com/showthread.php?t=780155
Thanks. Avatar looks great so I realize movies can look amazing, like you said I'm just doing something wrong. Ill check your link, thanks again
Hello guys I've been converting my videos to 800x480 for awhile and their all fine. I was wondering if I convert them to 1920x1080 would there be a significant difference since the SGSII's native resolution is 800x480. Thanks for answering my question. Oh yeah the resolution the videos come in are usually low quality like 704x400 usually in .rmvb format. Sometimes I do download 720p videos and convert them to 800x480.
Sent from my GT-I9100 using XDA App
I've been converting mine as well, no difference at all. I just maintain the bitrate and it also reduces the file size.
GS II's screen resolution is 480x800. So anything above that resolution is practically meaningless, let alone 720P or 1080P.
Regards.
I can argue about that.
1689600
couldnt resist
Hi all
What is the general consensus for the best resolution for playing movies on the tablet considering the screen it comes with?
I am heading overseas shortly and so wanted to look at whether I convert some of my large movies to a smaller filesize and if I do what resolution is ideal.
That of course could lead on to the app people use for said conversion (but that is very subjective to each individual).
Cheers
Well since our screen supports 1080P i would say that is also the ideal resolution now I don't think that your movies are any higher resolution than that so it is also very subjective what resolution is 'optimal' it will always be a tradeoff between quality and filesize, personally I don't really see that much difference between 1080 and 720. With 480p I do really see a difference. But I would say that is sufficient for your trip.
Sent from my SGP311 using Tapatalk 4 Beta
The ideal format for the XPERIA Tablet Z (and well any other modern tablet) is h.264 .mp4 AVC. The tablet's screen is WUXGA (1920x1200), so itnis perfect for 1080p. Sony's official whitepaper states the device supports up to 20Mbps, somI recommend encoding your video to that bit rate for maximum quality. A bit rate of 15Mbps is also a good compromise if you still want high quality, while 11.5Mbps is still ideal. 7.5Mbps 720p is also suitable if you dont mind sacrificing some quality.
I have an eye for low quality, but if you are dealing with feature length live action movies here, handbraking them to 10Mbps h264 1070p should do.
I myself use 15Mbps. I can provide a screencap of a 15Mbps video on the tablet if you want one.
So I just bought a Homido to use with the nexus 6p. It's fun but the resulting image isnt too sharp. I think this is because demo movies are 1080p generally and since our phone is quite big, the resulting image isnt too sharp. I wonder if someone knows a source for 1440p or 4k SBS movies to demo ? I couldnt find any myself. Not youtube but real movies for download, shot in QHD or UHD. Please share if you've found something in this thread, thanks !
Actually I'm starting to think there's currently just *no* SBS content higher than 1080p, even on the torrents I can't find anything higher than 1080p, that's quite a bummer ... Still, if someone knows a demo or something >1080p, please do share !
Actually so it seems the SBS format only goes up to 1080p24 ... Just starting to look into this, but wondering now if there's a format that supports higher resolutions ?
*EDIT* also just found this article, the makers of the Oculus rift say that 8k resolution per eye is needed to truely get rid of pixelation: http://arstechnica.com/gaming/2013/...esolution-per-eye-isnt-enough-for-perfect-vr/ and the article makes a point that you need even a multiple of that to get rid of aliasing.
Oh and 500 fps, hehe.
That seems still quite a few years away, lol.
Currently virtual reality is interesting but I understand now we're still quite a few (probably 10) years away from hardware that can generate a really good VR experience. 1080p24 just isn't it....
To answer my own question:
Full SBS = 3840 x 1080 which exists but requires specialist playback equipment
Half SBS = 1920 x 1080 which is very widespread and also of course broadcast-able.
So Full SBS is actually 1080p *per eye*, so our display cant yield true full SBS unfortunately.