Debian Multimedia :: Avconv Downsizing Resolution - Can't Read Text
Dec 3, 2015
I have recently began to use libav and had an issue I was running into.. Not exactly how to word it so I will simply state the symptoms..
Goal: Create a screencast demo on linux, play it back on a windows machine.
I am running this command to record the screen, installed libav:
avconv -f x11grab -r 25 -s 1600x900 -i :0.0 -vcodec libx264 -threads 4 /home/sysadmin/Desktop/output.avi
The issue I am running into is, when I try to play this file in Windows Media Player or even VLC on the linux host, the default size of the video results in the text in the terminal to be unreadable..
When I re-size the video, as in blow it up to full screen, I can see the text clearly..
The playback device is running something like 1280x1020 resolution. Is there a way to make it so that the text will also be readable?
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Feb 5, 2015
I try to record video with my Win TV capture card with avconv. The exact same lines worked fine with Ubuntu 12 and with SUSE, but with Ubuntu 14, the audio is out of sync.
avconv -f video4linux2 -channel 1 -s 640x480 -i /dev/video0 -deinterlace -f alsa -i plughw:1,0 -ar 22050 -ab 64k -acodec ac3_fixed -vcodec mpeg4 -vb 2000k -y test.mp4
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Aug 12, 2015
I just converted a movie from mp4 to avi format and was away from the computer during the conversion. When I came back, the file had been properly converted but the computer was at the login prompt. I assume that it rebooted when the conversion was complete. Is this normal behavior? I don't see any avconv 'switches' to prevent that from happening.
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Sep 10, 2015
I have a problem with avconv. Most of the use cases work spledidly, but when I need to crop a segment and then splice multiple segments together, I get problems.
The process I use is this:
1. Raw recording of short segments in high-quality AVI, These are produced by avconv, some as screencast and some by combining a PNG file with flac audio from audacity.
2. Conversion segment by segment into mp4 and ogv
Options A: -acodec aac -strict experimental -ab 128k -ac 2 -vcodec libx264 -s 640x480 -pix_fmt yuv420p -movflags +faststart -crf 22
Options B: -acodec libvorbis -ab 128k -ac 2 -vcodec libtheora -s 640x480 -b 500k
3. Splicing of the segments using MP4Box or oggCat.
(I used to do this in ffmpeg, but I have not figured out how to do it in avconv.)
This works.
In some cases I need to crop the segments, using the copy codecs and the -ss and/or =t options.
If I crop the AVI segments (between 1 and 2) the sound is clipping (this also generates a spree of error messages `Non-monotonous DTS'). If I crop mp4/ogv segments, (between 2 and 3) the remaining video, after the cropped segment are out of sync. I get the same problems with both OGV and MP4 playing them in vlc. Playing the mp4 directly in iceweasel works as it should.
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Jan 11, 2016
I am trying to perform a 2-pass encoding of a video from .mov to .webm, but it looks like that the 2-pass encoding is much worse than doing a single pass encoding. Here are the two commands I use:
Code: Select allavconv -y -i input.mov -r:v 25/1 -c:v libvpx -minrate 400k -maxrate 600k -b:v 400k -s 640x360 -force_fps -b:a 80k -pass 1 output.webm
avconv -y -i input.mov -r:v 25/1 -c:v libvpx -minrate 400k -maxrate 600k -b:v 400k -s 640x360 -force_fps -b:a 80k -pass 2 output.webm
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Jan 29, 2011
I just installed Debian and I find it very difficult to read the text in the GUI windows. I cannot explain it well--which is one of the reason I probably cannot find the answer.But, it looks like some of the text was printed (it these were printed pages) from a printer that is running out of toner. If I switch to the ctrl-alt-F2 terminal then the text is easy to read. I have installed on other partitions Ubuntu and Windows in both of these operating systems everything looks fine
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Feb 17, 2015
I am running Debian Jessie with Gnome 3.14.2 on a Macbook Pro 15" with retina display. My resolution is currently set to 2880:1800 and any time I try to lower it, the whole screen goes to black (even if I change it to something in the 16:10 ratio) and I just have to keep force restarting when doing that. I want to lower it because a lot of stuff is really small. Certain aspects of windows in programs are so small, and in order to properly view stuff on my web browser I have to increase the magnification to around 250% for it to be reasonable.
Some things seem normally sized in the windows, and thus make things awkward on the screen, especially in chrome. Is there a way to fix this without having to change my resolution and/or font sizes? Making font sizes bigger on the gnome tweak tool makes things look a bit more awkward because it squeezes the text into small spaces. I would rather keep a higher resolution for a better picture, and changing it seems to mess things up. Here is what my browser looks like (without magnifying). Notice how the font size in the bookmark bar is disproportionately large compared to the buttons in the top right to close/max/min the window.
And this problem isn't just in the browser, but for example, in matlab everything is extremely tiny. I want to make everything larger, not just the text...
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Jun 27, 2011
My brand new DVD+RW disc can't be read by debian (6.0) after trying to erase and burn a new iso into it. I used brasero for this but it failed to burn it and left it in this bad state. It could be detected before the failed brasero session though.
However, whenever I introduce the dvd into the drive after the brasero session, the dvd drive makes the same noises all the time as if it can't read something on it and is going back to the beginning and doing this all the time over and over again. The data on the dvd is not important but what I want to know is if it is possible to stop the OS from trying to read what's in it so I can use some erasing software to make the dvd useful again.
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Jul 22, 2015
I have an Laptop Acer aspire one D250 with debian 8 and gnome3, actualy the screen resolution are 1024*600 pixels, i want to try to maximize resolution.I hope to win 1280*800 screen resolution but the control panel fix display maximum to 1024*600, how i can to put another large resolution ?which years ago, i'm editing the xorg.conf file to put that i want resolution !I forgot that can i do for maximise resolution, some on can tell me how fix manualy the screen resolution.
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Aug 25, 2010
I just installed Debian 5 onto an older PC and cannot get a better resolution than 800x600. The PC is currently dual booting with Windows XP and in Windows I can get the resolution to 1280x768 without any issues. I checked the device manager in Windows and the video card shows up as VIA/S3G Unichrome II. What do i need to do to get this working at 1280x768 in Debian? I had Mint installed previously and it got to this resolution fine until I upgraded it to a new version, then it was stuck at 1024x768.
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May 14, 2011
This system is basically working fine, but I'd like to change the video resolution. It has defaulted to the monitor's native resolution, which is 1920 x 1024. I'd like to set 1600 x 900. However, it's not in the list. In fact, the other resolutions listed in System => Preferences => Monitors aren't even the same ratio -they're more like the old 4:3.
Background: desktop pc with AMD64, 4GB RAM, etc.video is Nvidia Geforce 8200 or 8400installed debian 6.0 with the default "base" or "basic" or somesuch, plus "graphical environment". It's Gnome 2-series I believe.And it seems to be using the Nouveau driver as far as I can tell.So I Googled, and on various pages people said to edit the file: etc/X11/xorg.conf
However, there is no such file on my system. So I googled more, and posters give the following advice: kill the X server, kill the gdm, and then give command: Xorg -configure and this is supposed to generate the config file. However, for me it did not generate the file. Instead it failed with the error message: "Number of created screens does not match number of detected devices".
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Jul 11, 2011
FINALLY got my personal server up and running again after my GPU's fan died. i rigged a new fan/heatsink on it but i can't seem to get the resolution correct. nvidia-settings (version 195.36.31) says 1280x960 but i have to pan around the entire desktop (like having a huge image zoomed in on a small screen).
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Aug 16, 2011
I recently switched from a DVI cable to a HDMI cable (from the motherboard to the monitor) on my desktop. Everything was working flawlessly with the DVI cable, but when i switched to the HDMI cable the resolution became altered in a strange way. According to both the 'Monitor Preferences' and 'NVIDIA X Server Settings' my resolution is 1920x1080. Both the mouse and some icons looks to be in that resolution. However, the gnome panels, the rest of the icons, toolbars, etc. are huge and in a low resolution. While using Iceweasel, the top gnome panel and the Iceweasel toolbars take up half my screen! I can't find a way to alter the size of these since my resolution is set to maximum. I thought it might be a problem with gnome, so I tried Fluxbox, but the same problems were there. Have anybody else come across this, or perhaps know of a solution?
[Code]...
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Aug 24, 2011
A few weeks ago, I've noticed that my FullHD external LCD (LG Flatron W2243S), which was working without any flaw, can't be setup to reach 1920x1080 anymore, even after a fresh install. My graphics card is Nvidia G105M (I'm using Nvidia proprietary drivers), and I used to configure my monitor with nvidia-settings which usually took something like 30 seconds to setup twinview. However, this monitor is now detected as CRT, and resolution can't be setup to more than 1024x768, which is horrible. I've been trying to use xrandr to setup resolutions, but xrandr -q prints this line:
root@polaris:/home/user# xrandr -q
xrandr: Failed to get size of gamma for output default
(...)
I've been trying several solutions, but nothing worked until the moment. I can find many users reporting this kind of problem across the internet, but any solution.
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Apr 27, 2015
I've downloaded a cbr (comic book) file. But I couldn't manage to read it. Tried built-in Document Viewer, Comix and mcomix. Nothing worked. Document Viewer says the file is full of empty pages, others show broken paper instead of the images. But when I unpack it, the images are normally unpacked. I can't attach it because I get an "Internal Server Error". I can however upload to somewhere else if you want to check the file.
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Oct 23, 2015
I just installed Debian 8 (loving it so far) and everything its working right except for one thing: The monitor resolution!
I've got a LG 22 inch monitor and it supports up to 1360x768 but the display settings only shows 1024x768 as max resolution. Doing a little research i was able to get the desire resolution (1360x768) through the use of the tool "xrandr". The problem is that the resolution its not permanent and i need to invoke the xrandr script (i wrote a very basic "script" to set the resolution) on every restart or session logout and of course this is annoying. I've tried to use "crontab" to invoke the script on every restart but for some reason did not worked.
So, making more research i saw that apparently the correct way to set the resolution is by making use of "xorg.conf" but didn't quite get how to do....
Here's the xrandr script that i use:
Code: Select allOUTPUT=VGA1
MODE=1360x768
MODELINE=""1360x768"Â Â 84.75Â 1360 1432 1568 1776Â 768 771 781 798 -hsync +vsyn$
xrandr --newmode $MODELINE
xrandr --addmode $OUTPUT $MODE
xrandr --output $OUTPUT --mode $MODE
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Feb 14, 2016
I just changed the desktop on my thinkpad from awesome to i3. And now I have some very strange issues with the screen resolution. Because at home I use this x60 thinkpad on a dockingstation and a 19" display. As long as I used Awesome as my Desktop, the display manager as well as the desktop itself could handle the different screen resolution depending on if I'm out with just my 12" on my thinkpad or with the much bigger screen on my home 19" display.
I can understand that i3 maybe cannot handle this alone and I need xrandx to enforce the screen resolution. But why is the display manager (lightdm) also affected by this change? What is so different that even the DM cannot find the proper screen resolution?
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Mar 18, 2010
I'm running debian lenny and want to change the screen resolution from 640x480 to 1024x768. I'm using a nVidia Geforce FX 5800 and I installed the additional nvidia drivers with the help of this tutorial [URL]. Here is my xorg.conf
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "de"
Option "XkbVariant" "nodeadkeys"
EndSection .....
When I try to change the screen resolution via the gnome menu I just can choose the 640x480 resolution and 50Hz refresh rate.
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Sep 3, 2010
I've googled the issue and had a little luck, though I can't seem to change my xorg.conf file because permissions are defailed. This is the example xorg.conf file I wrote based upon my original and the modifications:
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
[Code].....
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Sep 11, 2011
On my netbook I run crunchbang in tty (because X isn't supported) and it looks rather ugly. I have made it look fairly nice with the .bashrc but the text size is way too large. Is there anyone here that knows how to change it?Also I was wondering whether a png could be used as a tty background. Though I am possibly pushing the limitations of tty with that one lol.
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Feb 3, 2016
How to enable native screen resolution in X using VESA driver? I have IBM/Lenovo ThinkPad T61 with a native screen resolution of 1680x1050, but I am getting 1024x768 instead.
This is a fresh install of Debian 8.3 (latest stable) (Jessie).
The root cause of this is that nouveau graphics driver (which I was using before) was causing me kernel crashes. Full story here: [URL] .....
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Oct 1, 2010
I recently installed Debian 5.0 (Lenny) on a Dell Inspiron 1545 laptop. I have been banging my head trying to figure out why my laptop display (15.6" optimum resolution 1366x768) is only running at 1024x768. This was not a problem in Ubuntu even as far back as 8.10 (Intrepid Ibex) which came pre-installed.
I am running kernel 2.6.32 (from Backports) to get WiFi to work and it still hasn't remedied the video oddities.
How do I either:
1) Letterbox the 1024x768 so that it isn't distorted?
or, more preferably,
2) Display in the full 1366x768?
My video card is:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
I also have the xserver-xorg-video-intel driver from the stable repositories installed.
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Feb 11, 2015
When trying to render text with kino on amd64, I get:
Kino experienced a segmentation fault.
Dumping stack from the offending thread
Obtained 2 stack frames.
kino() [0x43bdb0]
/lib/x86_64-linux-gnu/libc.so.6(+0x321e0) [0x7f844b8401e0]
Done dumping - exiting.
I tried 'rm -rf ~/.kino-history' but this did not work.
I realized what I could have done wrong. I added deb-multimedia.org as a repository and installed mythtv and avidemux. I also did an update with aptitude and an upgrade with aptitude.
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Apr 2, 2011
I've Squeeze with a minimal XFCE 4 installed and looking for a simple text editor running under XFCE.
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Oct 29, 2010
I burn a dvd with k3b or braseo and it says it completed the burn w/o error but when I go to put it back in to read it just keeps the read light on on the drive and wont read. I have tried to read the DVD on windows 7 as well and get the same result. I had this issue with Kubuntu 10.04 as well and wrote it off as a quirk of Kubuntu. Before that I had Gentoo installed for many years w/o issue. So I have a hard time believing that suddenly when I switch from Gentoo that I am having this problem with my drive.
The following is the dmesg |Tail from inserting a dvd burnt w/ k3b:
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May 22, 2011
I can not watch a DVD video using Movie Player. It gives the message: An Error Ocurred Can not read from resource. What does it want me to do ? Buy a new DVD player ? I have no trouble with this drive in another distribution on the same computer, or playing audio CDs in this very Debian OS. So I don't think there is anything wrong with the DVD drive. VLC won't do anything either.
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May 3, 2015
I'm now working to install Debian 8 on another computer since yesterday. Another Linux, and as always, endless list of problems.
- A computer that was freezing at every installation attempt (but never at the same moment) during installation when the Broacom cardbus adapter was connected (it's a chance that it is easy to remove and I found it quickly... and it is working once installation is finished)
- Turning to sleep mode after 15 seconds if I don't quickly try to login
- BOINC receive no work
- Tray icons are here but invisible - no icons, just gray space
- xserver-xorg-video-savage is installed, but I have resolution problems, and weird glittering horizontal lines when the computer is working (as on my other PC with the SiS video card).
On Debian 7.8, it was working fine for having the 1024x768 native resolution of this laptop screen.
But, with debian 8, the max resolution is now "800x600" and with this screen, there is no smooth effect : the image is a disaster.
Here is "lspci -nn" :
Code: Select all00:00.0 Host bridge [0600]: VIA Technologies, Inc. P/KN266 Host Bridge [1106:3156]
00:01.0 PCI bridge [0604]: VIA Technologies, Inc. VT8633 [Apollo Pro266 AGP] [1106:b091]
00:0a.0 CardBus bridge [0607]: O2 Micro, Inc. OZ601/6912/711E0 CardBus/SmartCardBus Controller [1217:6972]
00:0c.0 FireWire (IEEE 1394) [0c00]: Texas Instruments TSB43AB21 IEEE-1394a-2000 Controller (PHY/Link) [104c:8026]
00:10.0 USB controller [0c03]: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller [1106:3038] (rev 80)
[Code] ....
How to confirm that my Video card is included into xserver-xorg-video-savage package ? How do I know if the driver is loaded ? How to modify xorg confifugration files in this modern flavour of Linux in order to force adding the 1024x768 resolution ? I already succeed into /etc/default/grub and "update-grub" for the bootloader screen but I want it too in the desktop environment.
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Jul 13, 2015
I am wanting to try to change my normal user (bbq) to a different screen size within my secondary user (lfs). I was wondering how one would do that.
This happened when OpenClonk changed my screen resolution and when i changed it back my screen blacked out (and me being the idiot save it).
Debian 8 GNOME
Also (a bit unrelated) could a video card problem cause a user to log out? I have been having some severe problems with my monitor and I am thinking it is th video card. Sometimes when I am starting a program my monitor will lose connection to my computer (HDMI signal not found) and I will either have to wait a few seconds and it will turn on or it will just stay blacked out.
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Jun 21, 2010
Having been using squeeze on my primary system for some time, I decided to install it on my media center PC. After doing a clean install I lost sound (another post) and my maximum video resolution dropped to 1280x1024. I was previously getting 1920x1080 (native) resolution under lenny on this box. So it's a mystery to me why I'm not getting that now. As you can see, the nvidia module is loaded:
# lsmod | grep nvidia
nvidia 9821382 0
i2c_core 12570 2 i2c_piix4,nvidia
PS--This was installed the "debian way" via module assistant.
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Apr 18, 2011
I am running Debian on a g3 mac and when I set the screen resolution to 1024 by 768 I cannot see everything, for instance the scroll bar on iceweasal is hidden, so I switched the resolution to 800 by 600 and then i load up evolution and find that the forward button isn't visible, is there a way to get a custom resolution that works with everything
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