Ubuntu Multimedia :: How To Increase Video Reproduction Quality

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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Ubuntu Multimedia :: Video Quality Is Poor

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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Ubuntu Multimedia :: Improve Quality Of Video Using Filters

May 23, 2010

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Aug 8, 2010

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Feb 4, 2010

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Ubuntu Multimedia :: Convert HD Mkv Video Files To AVI Or WMV Without Loss Of Quality

Nov 23, 2010

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Ubuntu Multimedia :: Choppy Video Quality - Horizontal Flickering

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

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Feb 26, 2010

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Ubuntu Multimedia :: Anything That Can Be Done To Increase Video Streaming Performance?

Jan 19, 2010

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Debian :: Increase Image & Font Rendering Quality?

Mar 23, 2011

Below are example screenshots of Freemind from Ubuntu Lucid and Debian Squeeze

Lucid

Squeeze

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and my question is.. how do i increase rendering quality in debian squeeze?

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Ubuntu Multimedia :: Twinview - Actual Video Size Does Not Increase

Jun 18, 2010

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General :: Change The Parameters Of In-built Gspca To Increase The Image Quality?

Mar 24, 2011

I'm using Logitech WebCam on fedora 11 and running webcam server to capture the images on the browser.. it works fine but the image quality is poor...could anyone suggest me how to change the image quality by passing parameters via command line??I tested Video quality on cheese as well, which is poor too..I searched a lot in google for a solution but no use... i got some patch but couldn't install that since the gspca driver on my fedora 11 is in-built..

Output of lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 020: ID 046d:092f Logitech, Inc. QuickCam Express Plus

[code]....

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Ubuntu :: Video Quality Is So Slow - Freezes Up?

Jun 15, 2010

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Software :: Ffmpeg Video Output Really Low Quality?

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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General :: Add Audio To A Video File Without Losing Quality?

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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Feb 19, 2011

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[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

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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.

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- In NVidia XVideo settings
- In NVidia OpenGLX settings
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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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Sep 20, 2010

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Dec 9, 2010

I'm still new to Ubuntu and I'm trying to get the sound working. I have a Satellite X205-SLi1 and just installed Lucid. Everything is okay, except for the sound. My laptop has 5.1 harman/kardon speakers and I think just some of them are being used and the quality is bad. I'm not sure what to do...

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Ubuntu Multimedia :: Low Sound Quality In Pod Casts

Jul 21, 2011

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Jan 8, 2010

I downloaded an HD video from ....., but my computer is not powerful enough to play it. Is it possible to convert it to standard quality in Handbrake? If not, what video converter would be best?

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Ubuntu Multimedia :: Splitting Videos And Maintaining Quality?

Feb 24, 2010

I am trying to use ffmpeg to split a number of videos of different types (WMV, MPG, AVI). I do not want to change anything else, just split them into smaller chunks. The video is split, but the quality of the output file is terrible. I would describe it as "blocky" (I think the correct term is "pixelated"). When I make the player (KMPlayer) much smaller the problem naturally goes away.

The command I am using:

ffmpeg -i original_vid.wmv -ss 00:00:00 -t 00:05:00 first_vid.wmv

The output:

FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis

[Code]....

"Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 25.00 (25/1)

Seems to mean something, but I couldn't find anything saying that this is the problem or what O should do to correct it.

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Ubuntu Multimedia :: Choose A High Quality Mp3 Player?

Apr 1, 2010

I am currently in the market for one that has ogg/flac support on my next paycheck.

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Jun 14, 2010

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Aug 4, 2010

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[code]...

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Ubuntu Multimedia :: Massive / Horrible Sound Quality

Nov 26, 2010

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Dec 24, 2010

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Ubuntu Multimedia :: Degradation Of Audio Quality By Reencoding

Jan 18, 2011

If I were to take a flac music file and convert it to alac using ffmpeg would there be any degradation of audio quality? I am also wondering how many people are actually able to tell the difference between a high quality MP3 and a lossless file. If I were to find a suitable place to upload a load of different files would people be willing to judge the audio quality?

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