Ubuntu Multimedia :: How Can I Half Video's Quality And Size
Aug 8, 2010
I have a 500MB video that is 720x400. I want to half the size of the video while retaining the same relative quality.My main goal is to half the filesize of the video, but to do that and keep the same relative quality I will have to also make the resolution smaller.I can't seem to find a way to do this.I would preferer to use ffmpeg, but any solution would be good at this point. I would really like to be able to do this from the command line, but if there is a gui program that will also give me the command line it uses, that's great too.Does any one know of a way to half the file size of a video while maintaining the same relative quality?
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Sep 5, 2010
I'm running SLackware64 13.1 and today I notice if I play a video in Mplayer and select half size, my box freezes.
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Sep 19, 2010
I am using ubuntu version Ubuntu 8.04 , it is observed that the video quality is poor as compared to windows os i am not sure it is driver problem or something different, below are detail of my system
CPU : 2.6 Mhz
RAM :1024 MB
board : Intel 845 chipset
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May 23, 2010
I've some videos with poor quality.It has pixelation and such problems.Can somebody suggest me some filters to be used with avidemux for correcting the pixelation and maybe deblocking it
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May 11, 2011
When I watch movies on Ubuntu I noticed that quality of reproduction is not good as in Windows. All movies seems to have some sort of contrast problem which I don't know how to fix. This problem is not present in Windows (XP/7) and stand-alone DVD players play them also correctly.
Here are images (AVI, DivX format)
Windows version: http://i52.tinypic.com/125hlis.png
Linux version: http://i56.tinypic.com/tz53t.png
Also here is MKV format which is noticeably even sharper in Windows:
Windows version: http://i53.tinypic.com/2lmqxqe.png
Linux version: http://i53.tinypic.com/15gfmlt.png
Note: I didn't wanted to include them in post since they are quite big and I didn't want to do JPG compress since they might lose quality. Try not to resize them.
On Ubuntu I installed some 'extra' codecs (might be proprietary) via Software center. I use standard movie player that comes with 10.10, but for MKV I use VLC since mkv don't run in standard movie player. On Windows I use k-lite codec pack and GOM player. My guess is that Windows solve those sharpness and contrast issues by using some playback filters (possibly contained in k-lite codec pack) that are unavailable in Ubuntu. I installed proprietary video driver for ATI RADEON 2600.
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Feb 4, 2010
I hooked up my laptop via monitor cable to the L.C.D. T.V. and ran a patch I found on Ubuntu forums because it wasn't showing up on the T.V. After that it asked me what screen resolution I wanted I entered it and then the screen worked! However, now when I play movies on either the T.V as a monitor or just on the laptop itself it comes out with bad video quality now. It sucks because that was the purpose of hooking up my T.V. as the monitor was to watch movies and videos I have downloaded.
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Nov 23, 2010
does anyone know of any FOSS program I can use to convert HD X.264 MKV video files to AVI or WMV without loss of quality. I wish to stream these videos from my linux box (yes u can do that via ushare)to my xbox 360 but unfortunaly it wont play MKV files.
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Jan 16, 2011
I installed Ubuntu 10.10 recently and I love it. Everything works great except for video playing. When I try to play DVD's with VLC or ANY video player, I get horizontal flickering and I can't seem to fix it. I re-downloaded and installed the most recent video drivers from Nvidia and it did not change anything.
My video card:
Code:
I don't know what else to do. When I run windows, the videos play smoothly, just fine. But when I play the same DVD's under Ubuntu, it's choppy.
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Jan 3, 2010
I spent about a half hour wrestling with different website tutorials about how to convert a file with ffmpeg and figuring out how to get all the video quality options right. Then I discovered you can just use the -sameq option and it figures it all out for you if you don't want to change the vid quality but just want it in another format. Thought I'd leave this on the site in case anyone else finds himself in the same boat.
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Feb 26, 2010
is there a way to zoom in on an image with out as much blur as normal?
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Jan 4, 2011
is there software for ubuntu 10.10 along the lines of windoze movie maker, that is able to reduce a wmv etc from 50 mib to 5mib ?
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Jun 7, 2010
I have rendered out less than two minutes of High Definition animation to Avi-Jpeg Format in Blender. Now, I have this 2 GB file. Going at this rate, it's going to take a whole DVD set to play a 15 min movie.
Surely, this file doesn't need 2 GB just for 1:45 min/sec, right? Even at high def? How do I reduce this file size down to like a manageable number, say, 20 miB?
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Jun 6, 2011
I recently have bought a digital reflex. After a few shootings and so on it's now come the time to use my Ubuntu at best to work with my camera. Can you recommend to me some software (if it's an all in 1 product the better)
What I'm really interested in is handling RAW format (.cp2 if I'm correct?), tagging renaming and organizing my pictures (both with and without filters and so on applied on them). Also it would be great if it would allow me to bulk export images at the desired size and quality. (I've tried digiKam but it doesn't import pictures from my camera)
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Apr 30, 2010
Am running Ubuntu 9.10 with Skype 2.1. Incoming video comes in as a small window, with no capability of resizing. I don't see a way to control the size.
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Jun 11, 2010
I am running ubuntu 10.04 with the fglrx driver installed with apt-get. I have an ATI Radeon HD AGP with 512MB of video ram. My bios window size is 64MB. The Xorg.0.log file shows that 512MB is recognized. I also tried checking the /proc/mtrr file and it shows two values one I believe is my ram size which looks to be correct at 1.5GB the other is 512MB which I think is my video ram size, but when I do an lspci -v the video ram size shows 256MB. I am trying to run Doom 3 and it only allows me to use 256MB of memory.
X.Org X Server 1.7.6
Release Date: 2010-03-17
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-25-server i686 Ubuntu
Current Operating System: Linux Merlin 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 22:02:19 UTC 2010 i686
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=b72f83f8-a868-4098-9d87-2a082f698167 ro quiet splash
Build Date: 23 April 2010 05:11:50PM .....
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Jun 18, 2010
i have some issues running twinview through my laptop and an additional monitor. i currently have the nvidia settings such that the monitor is the primary screen. however, whenever i click full screen in videos or another application, it maximizes in my laptop screen. also - when i maximize videos videos, the screen fills up, but the actual video size doesn't tend to increase (it doesn't stretch to fit). is this an adobe problem? ubuntu 10.04, nvidia driver v195, dell latitude d630 laptop.
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Feb 3, 2011
i have an hp 110 mini running 10.10 laptop (not netbook. i prefer the laptop desktop). i use firefox as my default browser. i find that i must always scroll and center web pages with embedded video (e.g. videos), and even then, i may not see the entire video frame (off the page top and bottom)
i know i can "open up" the usable area of firefox with add-ons (but haven't done it yet). are there any other ways, either through ubuntu screen settings, firefox settings, or flash settings, to shrink or adjust the default video frame size on the page? or is this simply one of the limitations of a netbook i will have to deal with?
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Jun 14, 2010
How can I decrease the amount of video memory in a debian squeeze laptop? The amount of video memory is 1GB and I want to reduce it to 512MB or 256MB. How can I do this
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Feb 7, 2010
I have just noticed a nice feature in Windows 7 - when you drag a window to the edge of the screen (the mouse pointer must touch the edge), windows offers you to resize the window to exactly half of the screen size. This is actually very handy on the wide screen monitors.
Is it possible (and how) to configure Kde 4 to do the same thing?
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Jun 15, 2010
my girlfriend has a netbook(acer A0751h-1401) and always complains how slow it is on vista and how much it freezes up, so i put ubuntu netbook remix on it. The video qaulity is so slow i give up and install xubuntu thinking it will be better since it is for slower computers, wrong. So im thinking it is a video driver issue or something. it has the intel gma 500 in it but it is only allowed to use 8mb of memory for video and i cant change it in the bios. I mean it shouldnt have all the lag on xubntu that it does
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Aug 11, 2010
I was experimenting with transcoding video with ffmpeg. using the command
Code:
ffmpeg -i moviename.avi moviename.mkv
outputs the .avi into .mkv, but the output quality is very, very bad, while the original is dvd-quality.
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May 27, 2010
I just upgraded from 9.04 to 10.04 and so far I have those problems:
1. Before, everything in my system was in English. Now, half is in English, half in another language (PCManFM, some menus etc). I tried setting up Language Support but it changes nothing.
2. Cursor themes work only when hovering the mouse over "X" buttons in the right top corner of the window. As soon as I move the mouse somewhere else, it goes back to default cursor theme, even though I tried selecting 5 different themes - same result.
4. Hibernation don't work anymore. s2disk saves image to disk and then it resumes it but computer stops on text message along the lines of "Resume completed successfully".
5. Changing volume with keyboard shotcuts no longer works.
6. Smplayer does not display picture anymore when playing movies. The view is just empty. I can only hear the soundtrack. It is using XV filter.
7. PCmanFM that used to worked flawlessly, now after going into 1 or 2 subdirectories stops reacting to clicks on file/folder list. Need to open new instance to be able to do anything and this again would become unusable after visiting 1-2 folders.
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Mar 13, 2010
how to get xsane to scan a document and have it display as a full 8.5x11 sized document instead of something half that size? I've been trying and trying and can't seem to figure it out.
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May 3, 2011
I have a vp6 codec flv. I have a wav file that I want to convert into mp3 and added to the vp6 flv. So when I play the flv the audio is added and the video quality is not changed.I tried:ffmpeg -i 20.flv -i 20.wav -vcodec copy -acodec libmp3lame new_file.flvbut I an error "Could not write header for output file #0 (incorrect codec parameters ?)". I'm guessing because it is a vp6 flv codec.Is there a way to just add an audio file to the flv? There is no audio in the current flv. I cannot lose any quality in the video.
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Jun 22, 2011
I'm not sure if this is the right place for this. I'm not sure which veraion of linux I have but it was the latest veraon bfor the recent update. I accidentally hit alt ctrl f11 and my comp went inyo the grub menu. I've tried startx and it does nothing. About half the commands I enter do nothing and the other half r not found or are incorrect. The only vommand thw actualley work is reboot. I searched for this and read a grub guide but it did no good.
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Feb 27, 2010
i have a problem with video.when i make full size video from browser or from video player i see only black screen.can anybody help me pls?
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Feb 19, 2011
I installed fedora 14 on Dell laptop but I am unable to change resolution on my laptop also video quality is poor , I think proper drivers are not installed. I am new to Fedora, so probably missing something.
[root@localhost qalandar]# lspci -nnk | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02)
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Jun 16, 2010
I am looking for a good alternative to Skype. I would like to have video and voice calls with a family member who uses MS XP but would like to avoid Skype if possible. Does anyone know of a good client with good video and voice quality that will work on both platforms. I'd like it to use open standards so at least we can use different OS specific clients if one is not available for both platforms. Googling hasn't yielded much and some of the results refer to really old (~2006) articles or apps. I hope I'm not doomed to using Skype. I've resisted so long with using SIP clients for voice but am stumped now that I want to include video.
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Jul 24, 2010
I'm trying to get the best performance/quality on my my 10.04 box and i have a few questions regarding 'sync to vblank'. My first question : I see 'sync to vblank' in 3 different locations.
- In compiz display settings
- In NVidia XVideo settings
- In NVidia OpenGLX settings
What is the difference between the 3 ?
Second question : I used to have problems watching movies where the picture seemed to be cut in half ( i'm not a native english speaker so i don't know the technical term). After reading some forums, i enabled sync to vblank everywhere i saw it. That solved the movie problem. But maybe that was overkill ?
So i did some benchmarking and noticed the following :
When i disable 'sync to vblank' in compiz my compiz benchmark drops from 60 to 30. But then my movies look worse.When i disable 'sync to vblank' in NVidia OpenGlx my GlxGears framerate jumps from 300 to 36000.I didn't notice anything when changing vsync in the NVidia XVideo setting. System specs below.
Ubuntu 10.04 64b
Nvidia GT 230 1536MB
NVIDIA Driver Version : 195.36.24
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Jul 11, 2010
When the opening little music plays during start up, the first half of it is loud, but halfway through, the sound cuts to about half volume. Everything else afterwards is also very quiet. After boosting the volume output to 150%, and boosting VLC's audio output to 200%, the audio is still barely audible on my laptop. I've gone into alsamixer, and it's at max. I once found how to reset the audio card, and the sound was normal again, but only until I shut the laptop off, and next time, it was the same as always.
I'm on Ubuntu 9.10, and using an old Toshiba Satellite laptop. Don't know what my sound card is.
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