Hello,
I'm trying to create a good preset in Handbrake for Videos to play on my Nexus 7. Can anyone tell me if I would get better results settings the picture size to 1920 (width) or 1280 (width)?
I know the N7 has a resolution 1920 x 1200 but I want to keep the file sizes reasonable whilst retaining decent HD quality?
I'm guessing that if I were to use 1280 x 720 the video would then be stretched to fill the screen thus making the reduced file size pretty redundnt?
iamtherealmungo said:
I'm guessing that if I were to use 1280 x 720 the video would then be stretched to fill the screen thus making the reduced file size pretty redundnt?
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Click to collapse
I'm not really following you here.
The screen is 16:10, which means most stuff will run with small to medium sized black bars on the top and bottom of the screen while held in landscape. Old 4:3 AR stuff will have black bars at the sides.
If I personally were to make a trip where I wanted to take a lot of videos and didn't have a lot of storage capacity, I'd resize them to be 720p. Unless I were to output them to a TV later on. 1080p on that screen size, I can't really see the difference.
But my advice to you: try it out. Make some 1080p and 720p encodes and then have someone start a video and you have to try and guess if it is 1080p or 720p. If you guess right 50% of the time, do 720p.
I do all my videos at 720p with Handbrake and they look great on the N7. There is a lot of information out there about encoding settings. It comes down to personal preference and the amount of time you're willing to spend encoding videos.
I do most of my conversions at 720p with handbrake. The settings I change are: 1280 width loose / h.264 .mp4, check large file size if input is > 5GB / 18fps/ aac faacp & ac3 passthru (no need for the two audio tracks unless you use an Apple TV which will only use the 1st track)
Sent from my Nexus 7 using Tapatalk 4
iamtherealmungo said:
Hello,
I'm trying to create a good preset in Handbrake for Videos to play on my Nexus 7. Can anyone tell me if I would get better results settings the picture size to 1920 (width) or 1280 (width)?
I know the N7 has a resolution 1920 x 1200 but I want to keep the file sizes reasonable whilst retaining decent HD quality?
I'm guessing that if I were to use 1280 x 720 the video would then be stretched to fill the screen thus making the reduced file size pretty redundnt?
Click to expand...
Click to collapse
On a screen this size you will be fine with 720. I have a 1080p projector and an 84" screen and I only notice a big difference with animated movies such as pixars or DreamWorks in 720 vs 1080.
Sent from my Nexus 7 using Tapatalk 4
mertzi said:
On a screen this size you will be fine with 720. I have a 1080p projector and an 84" screen and I only notice a big difference with animated movies such as pixars or DreamWorks in 720 vs 1080.
Sent from my Nexus 7 using Tapatalk 4
Click to expand...
Click to collapse
Agreed. Even on my 40" LCD TV, 720p is plenty. So it is certainly enough for a tablet.
The extra resolution on these things is more useful for text based applications IMO. Video is fine at 720p.
Related
Ok, I present to you what I believe to be the best trade off between file-size and quality, given when I'm likely to watch a film on this thing. Feel free to disagree, everyone has their own preferences.
Why have I chosen these settings?
Well, given that I normally watch films on a television, watching them on the Tab is only gonna happen when I'm on the move. So a >1GB video seems pointless, as on a screen that size you'll barely notice the difference in quality. So I aimed to get a film in to ~500MB and to a quality that is still watchable. I went for 500MB as a target because a film that's ~700MB on a 15.6" laptop screen is perfectly watchable. On the Tab the screen is smaller, and the pixel density higher, so we can afford a smaller file size for a video of the same dimensions. I chose to upscale during the encode instead of during playback because the Tab does a really bad job of upscaling (horribly pixilated, especially in high contrast). I think that you could get a film to 400MB, but that's too far for my taste.
To reiterate, I use these settings to keep file size to a minimum while maintaining a watchable quality. I do not need a 2GB HD film when I can fit 4-5 films in that space. If I want to watch a film at a high quality I use my 42" TV, not a 7" tablet.
What you need:
A film to convert for use on your tablet
Handbrake
Time
How do I do it then?
Load up handbrake, and select your source and destination files.
Ensure the preset is set to "Normal"
On the "Picture" tab make sure "Anamorphic" is set to "None"
Ensure "Keep aspect ratio" is ticked
Set the height of the output to the max it'll allow (assuming you're using an SD film. If not, set the width to 1024)
Switch to the "Video" tab
Ensure "Constant Quality" is used, and set the RF value to ~27. Larger numbers mean lower quality, and it's a logarithmic scale.
Switch to the "Audio" tab
Change the mixdown to stereo and the sampling rate to 48
Hit "Start"
After a number of hours (at least the length of the film you're converting) you'll have a ~500MB video file (depends on the length of the film, and genre) ready for playback on your tab. When you hit play tap the screen, then tap the zoom setting button (top right) once. This will correct the aspect ratio.
For higher quality (and larger file sizes) make the RF lower (eg: 22).
Feedback is welcomed, I want to know how you guys do it.
Interesting posts
A few interesting posts are littered through the thread, here are a few:
http://forum.xda-developers.com/showpost.php?p=10934317&postcount=5
http://forum.xda-developers.com/showpost.php?p=11021354&postcount=28
http://forum.xda-developers.com/showpost.php?p=11022128&postcount=30
http://forum.xda-developers.com/showpost.php?p=11044836&postcount=35
http://forum.xda-developers.com/showpost.php?p=11046438&postcount=38
Sounds like pretty solid advice to me. When I convert I just use a freeware converter called iWisoft which has a ton of preset options for different media devices.
I've never worried too much about trying to cut their size down though because you're right, a 700 mb movie on a laptop is perfectly watchable. And to this day, with multiple movies, backed up images and ROMs, pics, backed up apps, etc, I've yet to run out of space on my 16 gig SD.
Sent from my SCH-I800 using XDA App
Thumbs up on the howto. This is how I've been converting videos for my SGS and SGT. Handbrake is great software.
Cool. Glad you like this.
I've just done a few more and the lowest I've seen is 306 MB. Lol (short film, not action) EDIT: And I forgot to upscale. Damn
Well. On Linux (Ubuntu 10.10) this is what I do..
Had a load of .ogm files that won't play on default player.. so...
I have a file called convert_vids.sh
Code:
> touch convert_vids.sh
Make sure you can run it..
Code:
> chmod +x convert_vids.sh
Open in a text editor
Code:
> nano convert_vids.sh
Then copy & paste this into it..
Code:
#!/bin/sh
for z in *.ogm
do
echo Converting file "$z" to "$z".avi
mencoder "$z" -aid 1 -slang en -ovc xvid -oac mp3lame -lameopts br=192 -mc 0 -xvidencopts pass=1:bitrate=1000 -o "$z".avi
done
And run it in the directory you wish to convert
Just use the main function if you only want to convert a single file or to test it works first!
Code:
mencoder thefilm.ogm -aid 1 -slang en -ovc xvid -oac mp3lame -lameopts br=192 -mc 0 -xvidencopts pass=1:bitrate=1000 -o thefilm.avi
You can play with the settings but basically it'll pick the first audio track, English subtitles, and encode it to xvid with a video bitrate of 1000kbps and mp3 audio of 192kbps and output the file with the same name as before but .avi added to the end. (These settings might be higher than some people want, but I like to future proof them..)
I like my manga in the original language with subs..
Enjoy.
A very elegant solution.
(mac only) Or downliad the handvrake nightly and update the presets. remove it and download and open 0.9.4 and use the ipad preset (tab has a 1024 * 600 screen compared to the ipads 1024*768)
Sent from my GT-P1000 using XDA App
Is there any way to upscale standard DVDs using Handbrake or something else? I'm less concerned about the size of the file as I am with the quality of the video.
Everything I do rips only to 720 wide. It always looks pretty junky on the Tab's screen.
Sent from my SCH-I800 using XDA App
Ripbot264 is an excellant tool. With a lot of features and simple to use.
slamorte said:
Is there any way to upscale standard DVDs using Handbrake or something else? I'm less concerned about the size of the file as I am with the quality of the video.
Everything I do rips only to 720 wide. It always looks pretty junky on the Tab's screen.
Sent from my SCH-I800 using XDA App
Click to expand...
Click to collapse
Yeah, follow these instructions. Use the arrows on the height field, and click the up one until it maxes out
Sent from my Legend using XDA App
slamorte said:
Is there any way to upscale standard DVDs using Handbrake or something else? I'm less concerned about the size of the file as I am with the quality of the video.
Everything I do rips only to 720 wide. It always looks pretty junky on the Tab's screen.
Sent from my SCH-I800 using XDA App
Click to expand...
Click to collapse
Why would you want to upscale for the Tab?
DVD's are 1024x576 (480 US), so its the perfect size for the Tab, just throw it into a decent x264 front end like Handbrake or Ripbot and set video quality to 21, AAC 160kb audio and it should a transparent copy.
TheGrammarFreak said:
Cool. Glad you like this.
I've just done a few more and the lowest I've seen is 306 MB. Lol (short film, not action) EDIT: And I forgot to upscale. Damn
Click to expand...
Click to collapse
Size means nothing, just quality.
If you set it to constant quality of around 21, it will be pretty transparent and the size will be whatever it will be.
dansus72 said:
Size means nothing, just quality.
If you set it to constant quality of around 21, it will be pretty transparent and the size will be whatever it will be.
Click to expand...
Click to collapse
The size doesn't bother me too much, as long as it's below 600mb. That example threw me, as I was expecting about 450mb for the film. With upscaling it was 430
dansus72 said:
Why would you want to upscale for the Tab?
DVD's are 1024x576 (480 US), so its the perfect size for the Tab, just throw it into a decent x264 front end like Handbrake or Ripbot and set video quality to 21, AAC 160kb audio and it should a transparent copy.
Click to expand...
Click to collapse
I upscale because, in the UK, films are stored in a frame that is 720*480, so widescreen films are squashed into that. When played back it's stretched lengthways to restore the aspect ratio, resulting in a display size of ~1024*480. Seeing as Android ignores PAR and just stretches the footage to fullscreen, actual size or full width we need to fix the aspect ratio in Handbrake. However, this results in films that are 720*3xx. Which looks awful, especially when you let the Tab scale it up to fullscreen. So I upscale in handbrake, because it does a better job of it, and it results in a film that's about the same size as the Tab's screen
Sent from my Legend using XDA App
TheGrammarFreak said:
I upscale because, in the UK, films are stored in a frame that is 720*480, so widescreen films are squashed into that. When played back it's stretched lengthways to restore the aspect ratio, resulting in a display size of ~1024*480. Seeing as Android ignores PAR and just stretched footage to fullscreen, actual size or full width we need to fix the aspect ratio in Handbrake. However, this results in films that are 720*3xx. Which looks awful, especially when you let the Tab scale it up to fullscreen. So I upscale in handbrake, because it does a better job of it, and it results in a film that's about the same size as the Tab's screen
Click to expand...
Click to collapse
If your encoding a 16:9 pixel (Anamorphic), and Android doesnt read the PAR, just force 1024x576 (PAL) or x480 (NTSC) in the settings and it should be fine.
If you cant force 1:1 pixel in your program of choice, i suggest you try Megui.
That forcing it essentially what I'm doing. Handbrake doesn't add padding though, which is why I max out the height
Do me a favor, go dl bourne ultimatum hd trailer u will know y
Sent from my GT-P1000 using XDA App
I'd much rather you explained why. I assume you're wanting me to witness the joy of 1080p footage on the tab? My answer to this would be thus: if I wanted to watch 1080p footage I'd watch it on my 42" TV with surround sound
To each of his own. My point is it doesn't matter where I watch it (TV or the tab), I always have the highest quality video and it looks gorgeous on either output
Upscale in handbrake
I must be thick cos I can't get Handbrake (0.9.5 on Win 7 64 bit) to upscale at all. If I load a film which is say 720x304, then (turning anamorphic to none) use the arrows to up the height (or width) it just defaults back to the original width and height. Am I missing something?
{EDIT.. If you use custom in the Anamorphic setttings it lets you upscale}
quattr0 said:
To each of his own. My point is it doesn't matter where I watch it (TV or the tab), I always have the highest quality video and it looks gorgeous on either output
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Click to collapse
And twice the battery drain.
Check it out , from minute 1:51 http://www.youtube.com/watch?v=bxeFQ6U4uRM&feature=player_embedded
The iPhone 4 does the same,i wonder what is the reason for that...
darksaber73 said:
The iPhone 4 does the same,i wonder what is the reason for that...
Click to expand...
Click to collapse
i read about the iphone doing the same but i have no clue
ya read that too on gsmarena.. hope they fix it by release time.
It isn't a really terrible issue,but i can't help but keep wondering what's the reason for that zoom.
It wasn't solved on iphone 4 so i guess there's a "deep and technical" reason beyond that.
Maybe the 1080p doesn't divide well into the 8 megapixel camera for easy conversion, so they make the viewable area slightly smaller so it is a nice multiple of the 1080p, because the processor can't handle the load otherwise. Shot in the dark.
Could it be that you can't display a full 1920x1080 video in a 800x480 screen?
Sent from my Captivate.
MikeyMike01 said:
Could it be that you can't display a full 1920x1080 video in a 800x480 screen?
Sent from my Captivate.
Click to expand...
Click to collapse
i doubt it because you cannot display full 720p either ie 1280x720 but it doesnt crop/zoom that image when you video record..
darksaber73 said:
The iPhone 4 does the same,i wonder what is the reason for that...
Click to expand...
Click to collapse
No it doesnt. Double tap your screen and it zooms out.
MikeyMike01 said:
Could it be that you can't display a full 1920x1080 video in a 800x480 screen?
Sent from my Captivate.
Click to expand...
Click to collapse
Naturally it is so and also logical !
How should a 800 x 480 pixel screen show full resolution of 1080 p ? It is not possible physically. Only via HML on the TV-screen You will have full HD res.
troed said:
Naturally it is so and also logical !
How should a 800 x 480 pixel screen show full resolution of 1080 p ? It is not possible physically. Only via HML on the TV-screen You will have full HD res.
Click to expand...
Click to collapse
but how can it display 1280x720?
Chad_Petree said:
but how can it display 1280x720?
Click to expand...
Click to collapse
1) Scale 1280x720 to 800x480, in which case you get an aspect ratio error of 1% which is more than acceptable.
2) Scale 1280x720 to 800x450 and pad the rest with black bars.
Is that what was asked?
For comparison purposes, my Captivate does this also. 720x480 is zoomed; 1280x720 is zoomed further.
martino2k6 said:
1) Scale 1280x720 to 800x480, in which case you get an aspect ratio error of 1% which is more than acceptable.
2) Scale 1280x720 to 800x450 and pad the rest with black bars.
Is that what was asked?
Click to expand...
Click to collapse
450? did you watch the video? the problem seems to be only in 1080p and as far i know 720p and 1080p have the same aspect ratio
Chad_Petree said:
450? did you watch the video? the problem seems to be only in 1080p and as far i know 720p and 1080p have the same aspect ratio
Click to expand...
Click to collapse
450 because it will be the same AR. Anyway, apologies. I should have read further back to see what the actual problem behind the discussion was.
Do we know the reason for this? All of the retail units are doing it.
Its simply a lower viewing angle at higher resolutions, its not that uncommon on video recording devices.
not sure I understand?
The youtube video in the OP shows RECORDING, not playback, right?
When it records in 1080p, the screen shows a zoomed in picture.
This is because the phone cannot take raw 1920x1080 video stream from the camera, and at the same time be encoding it as 1080p and saving it to memory, and downscaling that raw 1920x1080 stream to 800x480 to display on screen. This phone is powerful, but not that powerful. Or maybe that youtube video was of not final software.
Yes it's zoomed, and that's a hack to make it possible to record 1080p.
They've basically just cut off the pixels on the side, and are using 1920x1080 pixels from the centre of the camera's sensor.
This way, it doesn't have to process the "extra" pixels on the side, do pixel binning etc. The sensor is decent enough that 1080p still looks crisp at native res.
Rawat said:
Yes it's zoomed, and that's a hack to make it possible to record 1080p.
They've basically just cut off the pixels on the side, and are using 1920x1080 pixels from the centre of the camera's sensor.
This way, it doesn't have to process the "extra" pixels on the side, do pixel binning etc. The sensor is decent enough that 1080p still looks crisp at native res.
Click to expand...
Click to collapse
Ahh that is what they were showing Makes sense, just like the iP4 then - thanks for the explanation.
What settings do you guys use for decoding bluray or DVD to 1080p on this device using handbrake? I know since it is 16:10 then it doesn't have to be scaled like the iPad to fit on a 4:3.
I would assume HD decoding w/ mpeg4 and regular 1920x1080 resolution (no cropping)?
No one?
htowngator said:
No one?
Click to expand...
Click to collapse
I've just been using the apple tv 3 preset and then manually correcting the resolution to 1920 x 1080. Anyone else have any suggestions?
Using "android high" on a regular DVD rip resulted in pretty poor quality for me
Hey I just got my Nexus 10 and am excited. This weekend I will be traveling and have a ton of 1080P MKV files in my Media Server.
Are there any good free applications out there to convert some of the these movies to High Quality MP4 specifically for the 10" screens? Or maybe an app with a 30 days Trial?
I tried Handbrake and saw High Quality Android however i am completely confused. The new Width would be 720x800 however display size shows 729x304. That doesnt seem right for the 10".
Any help or better programs with a Nexus 10 setting you can point me too would be great.
ffactoryxx said:
Hey I just got my Nexus 10 and am excited. This weekend I will be traveling and have a ton of 1080P MKV files in my Media Server.
Are there any good free applications out there to convert some of the these movies to High Quality MP4 specifically for the 10" screens? Or maybe an app with a 30 days Trial?
I tried Handbrake and saw High Quality Android however i am completely confused. The new Width would be 720x800 however display size shows 729x304. That doesnt seem right for the 10".
Any help or better programs with a Nexus 10 setting you can point me too would be great.
Click to expand...
Click to collapse
I use the apple tv 3 settings in handbrake, and I hit custom on display size and zero everything out to get back to 1080p. It plays beautifully on the Nexus 10.
AndroidLonghorn said:
I use the apple tv 3 settings in handbrake, and I hit custom on display size and zero everything out to get back to 1080p. It plays beautifully on the Nexus 10.
Click to expand...
Click to collapse
I chose the Ipad setting and saw this.
Source : 1920 x 1080
Width : 1280 Height 800 < --- What does this mean? Do you zero this out?
Display Size: 1267 x 528 < --- What does this mean? Do you zero this out?
Anamorphic Loose < --- Do you keep that?
Modulus : 16
Also how big would a uncompressed Bluray be using your settings?
ffactoryxx said:
I chose the Ipad setting and saw this.
Source : 1920 x 1080
Width : 1280 Height 800 < --- What does this mean? Do you zero this out?
Display Size: 1267 x 528 < --- What does this mean? Do you zero this out?
Anamorphic Loose < --- Do you keep that?
Modulus : 16
Also how big would a uncompressed Bluray be using your settings?
Click to expand...
Click to collapse
Sorry can't answer all your questions but I have input on one:
"Also how big would a uncompressed Bluray be using your settings?"
Source file doesn't affect anything other than processing time - the output file size is dependent on your quality settings, resolution, play time, and bitrate - all things you configure to fine tune your video for balance between file size and image quality.
If he were to give an answer he would have to note exactly what settings he changed for you to replicate the same filesize per minute of video.
So the NExus 7 has a resolution of 1200x800, which is very close to the native 720p resolution size.
My question is, when streaming a 1080p video file on the nexus 7, will it look any better than a video size with a resolution of 1200x800 or 720p?
Wouldn't it be better to convert the resolution of 1080p videos to 1200x800 so reduce file size yet reduce absolutely no quality?
During this video http://www.youtube.com/watch?v=sOqn62m49S0#t=11m55s the guy plays a 720p file and 1080p file, they are streamed from a usb drive but how does the performance differ on the two even though they are playing on the nexus 7 screen, so are being outputted at 1200x800?
Another question I have is can I stream a 1080p video file using micro HDMI cable from the Nexus7 to a 1080p capable TV? Will the Nexus 7 GPU output 1080p on the TV full screen?
Help is very much appreciated!
Lanky09 said:
So the NExus 7 has a resolution of 1200x800, which is very close to the native 720p resolution size.
My question is, when streaming a 1080p video file on the nexus 7, will it look any better than a video size with a resolution of 1200x800 or 720p?
Wouldn't it be better to convert the resolution of 1080p videos to 1200x800 so reduce file size yet reduce absolutely no quality?
During this video http://www.youtube.com/watch?v=sOqn62m49S0#t=11m55s the guy plays a 720p file and 1080p file, they are streamed from a usb drive but how does the performance differ on the two even though they are playing on the nexus 7 screen, so are being outputted at 1200x800?
Another question I have is can I stream a 1080p video file using micro HDMI cable from the Nexus7 to a 1080p capable TV? Will the Nexus 7 GPU output 1080p on the TV full screen?
Help is very much appreciated!
Click to expand...
Click to collapse
The nexus 7 doesn't have a micro hdmi. So that's not gonna work. Only a mini USB but you can use an otg (on the go) cable to attach a flashdrive with movies you would like to watch. 1080P and 720P are compressed differently. 1080P is a much heavier format so if you really want the full 1080P experience your gonna have to stream the full size video which can be around 10gb. By reducing a 1080P video you can stream it easier and it will still be HD but quality will be less. 1080P is always going to look better than 720P because it is compressed so many times so the picture is literally made tighter increasing clarity. Lets say you took a 5mp picture and a 8mp picture and looked at them on the nexus 7 when you look closely at the pictures you can see the clarity difference between the 5 and 8 MP. Compression is what makes the biggest difference. You are cramming more and more information into a tiny place. So 1080P will look nicer on the nexus 7 but so will 720 but the details will be clearer on 1080P even though the nexus 7 outputs in a lesser resolution. But the difference will be harder to see on a smaller screen but much more noticeable in a bigger screen. But streaming a 1080P can be choppy because eventhough they are being displayed at the same resolution they are being input differently. Sorry for the long explanation
Sent from my HTC Holiday using xda app-developers app
zippox180 said:
The nexus 7 doesn't have a micro hdmi. So that's not gonna work. Only a mini USB but you can use an otg (on the go) cable to attach a flashdrive with movies you would like to watch. 1080P and 720P are compressed differently. 1080P is a much heavier format so if you really want the full 1080P experience your gonna have to stream the full size video which can be around 10gb. By reducing a 1080P video you can stream it easier and it will still be HD but quality will be less. 1080P is always going to look better than 720P because it is compressed so many times so the picture is literally made tighter increasing clarity. Lets say you took a 5mp picture and a 8mp picture and looked at them on the nexus 7 when you look closely at the pictures you can see the clarity difference between the 5 and 8 MP. Compression is what makes the biggest difference. You are cramming more and more information into a tiny place. So 1080P will look nicer on the nexus 7 but so will 720 but the details will be clearer on 1080P even though the nexus 7 outputs in a lesser resolution. But the difference will be harder to see on a smaller screen but much more noticeable in a bigger screen. But streaming a 1080P can be choppy because eventhough they are being displayed at the same resolution they are being input differently. Sorry for the long explanation
Sent from my HTC Holiday using xda app-developers app
Click to expand...
Click to collapse
Ok so is it possible to make a 1080p file reduced in resolution but not as compressed? So it still includes the detail you are talking about?
I thought that the pixel resolution was the main quality aspect of a video being outputted.
For the micro usb, i meant a micro usb to hdmi cable you can buy? http://www.amazon.co.uk/Kitvision-Micro-HDMI-Adapter-Cable/dp/B005TF2F2W
Lanky09 said:
Ok so is it possible to make a 1080p file reduced in resolution but not as compressed? So it still includes the detail you are talking about?
I thought that the pixel resolution was the main quality aspect of a video being outputted.
For the micro usb, i meant a micro usb to hdmi cable you can buy? http://www.amazon.co.uk/Kitvision-Micro-HDMI-Adapter-Cable/dp/B005TF2F2W
Click to expand...
Click to collapse
Mhl is not currently supported on the nexus 7. So no micro USB to hdmi. 1080 P is the resolution so if your going to reduce that then it wouldn't be 1080P. It might be 1080 I which is less but 720 P and 1080 I equal out to the same resolution. Honestly 720P is going to give you plenty of clarity and I wouldn't stress about 1080 P. Unless you have 1080 P movies downloaded I wouldn't worry about it.
Sent from my HTC Holiday using xda app-developers app
zippox180 said:
The nexus 7 doesn't have a micro hdmi. So that's not gonna work. Only a mini USB but you can use an otg (on the go) cable to attach a flashdrive with movies you would like to watch. 1080P and 720P are compressed differently. 1080P is a much heavier format so if you really want the full 1080P experience your gonna have to stream the full size video which can be around 10gb. By reducing a 1080P video you can stream it easier and it will still be HD but quality will be less. 1080P is always going to look better than 720P because it is compressed so many times so the picture is literally made tighter increasing clarity. Lets say you took a 5mp picture and a 8mp picture and looked at them on the nexus 7 when you look closely at the pictures you can see the clarity difference between the 5 and 8 MP. Compression is what makes the biggest difference. You are cramming more and more information into a tiny place. So 1080P will look nicer on the nexus 7 but so will 720 but the details will be clearer on 1080P even though the nexus 7 outputs in a lesser resolution. But the difference will be harder to see on a smaller screen but much more noticeable in a bigger screen. But streaming a 1080P can be choppy because eventhough they are being displayed at the same resolution they are being input differently. Sorry for the long explanation
Sent from my HTC Holiday using xda app-developers app
Click to expand...
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Zippox your making a mistake. You are confusing scaling and compression. Compression determines files size, clarity (less pixels). Scaling which is done by your set top box, DVD/blu-ray player, computer, smart phone, tablet just makes it fit to screen or what ever size it needs to be. Will 1080p look better on nexus then a 720p that's a yes/no answer. It will depend on how much each file was compressed. Generally a 1080p file is compressed much less then a 720p. Why? Cause its resolution is too huge. Which means compression (blocks aka pixels, seeing weird shadow/dark areas move, blurry images) can be easily seen if its not done right. If you set a 1080p file and 720p file and compress them the same bit rate as the 1080 and view it on a 7" native 720p screen you will not notice a difference. Why one will be scaled down and the other will not be scaled at all. Clarity will be equal at that point. Now once that 720p file has to scale up then its defects will be shown regardless of actual screen size. And trust me you will never stream a 10gb file. You can download a 10gb file but you will never stream that. Those stream sites actually offer two completely different files. The streaming file is much more compressed. Why server load, then actual internet speeds. That would have too much strain on the server. This is why streaming is not an alternative to actually owning the file. And the digital download is not as good as its blu-ray medium.
But scaling and compression are not the same. And you were getting them confused. There is no point in a 1080p file for the nexus 7. Unless you have it 1" from your face and straining your eyes you will not see the difference if its encoded (compressed) properly. 1080p scaled down to 1280x720 will look just how its supposed to at 1920x1080 you just need to be closer to the screen. But then make that fit on 7" and 720p scaled down. That's just waisting space on the nexus7. a 30 minute anime file at 720p is generally 250-350mb. Its 1080p counterpart is usually 700mb. And it will look the same on your tablet. The only difference will be based on source material. TV capture vs blu-ray rip.
Then there is compressors. H264 8bit, h264 10 bit, divx, xvid, wmv, mpeg2. This will also define how the video looks. H264 10bit is the current best compressor. You can have a h264 10bit compressed lower (in megabytes) then h264 8bit and it will look just as good as its higher filer size h264 8bit. But naturally they will compress it less to completely blow h264 8bit out the water.
None of this has anything to do with scaling. Scaling down you see less but still looks very clean, and clear. Scaling up makes for a sloppy mess. And lesser you compress the less of a mess it will look but it will not ever look as good as native or less. And scaling of actual screen you should never see a difference as long as resolution of screen isn't touch.
There are two meanings for scaling and 1 for compression. Scaling resolution, scaling actual TV. Compression is only for file size which determines the actual quality. Overly compress it will look horrible. There is no under compress. Scale up from files resolution will degrade any image.
Sent from my Nexus 7 using xda app-developers app
N7's resolution is 1280*800 and you should use 720p video as 1080p would just be a waste of space.
densetsu86 said:
Zippox your making a mistake. You are confusing scaling and compression. Compression determines files size, clarity (less pixels). Scaling which is done by your set top box, DVD/blu-ray player, computer, smart phone, tablet just makes it fit to screen or what ever size it needs to be. Will 1080p look better on nexus then a 720p that's a yes/no answer. It will depend on how much each file was compressed. Generally a 1080p file is compressed much less then a 720p. Why? Cause its resolution is too huge. Which means compression (blocks aka pixels, seeing weird shadow/dark areas move, blurry images) can be easily seen if its not done right. If you set a 1080p file and 720p file and compress them the same bit rate as the 1080 and view it on a 7" native 720p screen you will not notice a difference. Why one will be scaled down and the other will not be scaled at all. Clarity will be equal at that point. Now once that 720p file has to scale up then its defects will be shown regardless of actual screen size. And trust me you will never stream a 10gb file. You can download a 10gb file but you will never stream that. Those stream sites actually offer two completely different files. The streaming file is much more compressed. Why server load, then actual internet speeds. That would have too much strain on the server. This is why streaming is not an alternative to actually owning the file. And the digital download is not as good as its blu-ray medium.
But scaling and compression are not the same. And you were getting them confused. There is no point in a 1080p file for the nexus 7. Unless you have it 1" from your face and straining your eyes you will not see the difference if its encoded (compressed) properly. 1080p scaled down to 1280x720 will look just how its supposed to at 1920x1080 you just need to be closer to the screen. But then make that fit on 7" and 720p scaled down. That's just waisting space on the nexus7. a 30 minute anime file at 720p is generally 250-350mb. Its 1080p counterpart is usually 700mb. And it will look the same on your tablet. The only difference will be based on source material. TV capture vs blu-ray rip.
Then there is compressors. H264 8bit, h264 10 bit, divx, xvid, wmv, mpeg2. This will also define how the video looks. H264 10bit is the current best compressor. You can have a h264 10bit compressed lower (in megabytes) then h264 8bit and it will look just as good as its higher filer size h264 8bit. But naturally they will compress it less to completely blow h264 8bit out the water.
None of this has anything to do with scaling. Scaling down you see less but still looks very clean, and clear. Scaling up makes for a sloppy mess. And lesser you compress the less of a mess it will look but it will not ever look as good as native or less. And scaling of actual screen you should never see a difference as long as resolution of screen isn't touch.
There are two meanings for scaling and 1 for compression. Scaling resolution, scaling actual TV. Compression is only for file size which determines the actual quality. Overly compress it will look horrible. There is no under compress. Scale up from files resolution will degrade any image.
Sent from my Nexus 7 using xda app-developers app
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Maybe I should have made it clearer. Compression and scaling are different yes. Compression is taking a file size that is large and compressing it into a smaller size to fit. So taking a 1080P picture and watching it on the nexus 7 will look great. SCALING that 1080P picture to fit a 720P picture will change its resolution so that a 1920x1080 will fit on a 1280x720 size screen. Clarity will always go down regardless. Unless you are upstaging in which case it depends on your source. ENCODING is taking that same picture and converting into a different codec say xvid to avi. How you encode that picture (bitrate, codec,resolution) will determine the output quality. So bottom line 1080P will look better than 720P. But that's why I said don't sweat it on the nexus 7 because the difference will be minor. On a last note I stream Blu-ray rips at 10gb-15gb from my PC to my xbox all the time but unless your internet has an extremely high upload you will get choppy playback. Again sorry if I wasn't clear.
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---------- Post added at 10:00 AM ---------- Previous post was at 09:13 AM ----------
galax_ said:
N7's resolution is 1280*800 and you should use 720p video as 1080p would just be a waste of space.
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That's pretty much what I was trying to say lol but i load my movies on a flash and use an otg so I never actually lose my space on my nexus 7
Sent from my HTC Holiday using xda app-developers app