Debian :: FFMPEG And Webcam With GRBG Pixel Format
Jun 10, 2015
I am trying to stream from a webcam to mp4 file with avconv/ffmpeg with the GRBG pixel format. I can find a lot of ffmpeg commands and other stuff on google about a webcam stream to file with ffmpeg, but none of them use GRBG pixel format and are working for me ...
I have never tried something like this before
Output of v4l2-ctl --list-formats-ext:
Code: Select allioctl: VIDIOC_ENUM_FMT
Index : 0
Type : Video Capture
Pixel Format: 'GRBG'
Name : GRBG
Size: Discrete 162x120
Size: Discrete 324x240
How to get this working?
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May 3, 2010
Where can i get linux drivers for my QHM 500 LM CAMERA (with 6 lights & microphone 500 K pixel). i had been using windows for 12 years.
The full details of my webcam are on this link [url]
I could not find the linux drivers on this link [url]
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Nov 6, 2010
I'm using a logitech quickcam pro 3000 on Ubuntu 10.04.
When I run a simple program with OpenCV to display the output from a camera I get the following output:
Code:
A window still opens with the output from the camera, but it seems very low quality and has far less pixels then it should. The camera built into my computer runs the same program with no problems.
My code for the program is simply:
Code:
One further note to make is that I still have the bad quality and low number of pixels with the logitech even when using webcam program. I can seem to find any drivers to update or anything though.
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Jan 22, 2011
I'm still trying to find out if my coby mp3 player will actually play mtv video files as is advertised.
ffmpeg -formats does list mtv but the only command I really ever used was one to convert a vid to an mp3 so I tried Code: ffmpeg -i test.mp4 -acodec copy output.mtv it returns Code: Unable to find a suitable output format for 'output.mtv' I can't find any mtv files online for purchase or free for that matter, so I know this is all pretty obscure but shouldn't there be a way to convert them since ffmpeg lists mtv format?
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Aug 9, 2011
I have some .mp4 files. While open this file using vlc-player the resolution is fine. Then I convert this .mp4 format to .avi format using "ffmpeg". While open the .avi file using vlc-player the resolution is not fine.
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Aug 30, 2010
Anybody had any success in getting ffmpeg to work as advertised with video capture from a webcam? I really want to convert the webcam output to VP8 or H264, but apparently ffmpeg can't even capture the webcam with a video4linux device.
Code:
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Jul 24, 2011
I am having problems with ffmpeg. My goal is to capture a video stream from my webcam and feed that into a webcam-capturing program. But to get that to work, I will need ffmpeg to work. I need the following command to work, but I get an error:
Code:
$ ffmpeg -b 100K -an -f video4linux2 -s 320x240 -r 10 -i $device -b 100K -f image2pipe -vcodec mjpeg - | perl -pi -e 's/\xFF\xD8/KIRSLESEP\xFF\xD8/ig'
ffmpeg: relocation error: /usr/lib/libavfilter.so.2: symbol avformat_find_stream_info, version LIBAVFORMAT_53 not defined in file libavformat.so.53 with link time reference
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Jul 31, 2011
command line option in ffmpeg to do this
I am told I need the output file to comply with this
Video Resolution: 480*320
Video Bitrate: 768 kbps
Audio Bitrate: 128 kbps
Video Format: MPEG-4 (be sure not to use H264, as it�s not supported in the current firmware)
[Code]....
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Feb 8, 2015
I have been happily running Wheezy on the Chromebook Pixel with little or not issues. Recently I needed to re-install and decided to try Jessie. Again I was following the excellent instructions at [URL] .... except with the Jessie image.
However everytime I went to install it (after adding in the mem=4G line) it just rebooted and brought me back to the same install screen again. I just downloaded the Wheezy image again and it is installing now perfectly.
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Oct 24, 2010
I'm having trouble with the webcam that comes installed on the 701SD linux. It records video in .ogg format. Is there a way I can get it to record in another format? Also no websites online will recognize this webcam. They always say there is no webcam installed, but there is one, it's right next to the sound recorder on the play tab
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Jul 20, 2010
Since ffmpeg 6 is out for some time, when will Ubuntu Lucid afford such a new ffmpeg package from its repository?
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Mar 26, 2016
I'm currently running ffmpeg from a windows machine and realized it's rather redundant as I could be running it from the Debian (headless server) machine instead. What I'm trying to achieve is to get ffmpeg running as a background job...
Effectively, as far as I've gathered, this should be enough:
Code: Select allffmpeg -re -hide_banner -i "LIVE_INPUT_1" -f "LIVE_OUTPUT_1" &
But it's not working - when I run the command from terminal to check it, it works fine... but when I try to run it as a background job it creates the job but no output is generated. According to posts around the web, other people have been successful at running background jobs like this for transcoding static files.Should it be done differently or is this an issue with ffmpeg itself?
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Nov 20, 2015
How do I convert an ovg to avi file?
Why was ffmpeg removed in Jessie?
I read through more of this thread than I wanted to. [URL] ....
Does libav provide command line utilities to do something like converting ovg to avi, or determining the length of an mp3 file? Why is there absolutely no explanation as to why libav was preferred over ffmeg?
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Mar 1, 2011
As I understand (and remember) debian does not package x264 with its ffmpeg. [I say remember because I have a debian-multimedia line in my sources.list that I believe I added when I wanted a x264 enabled ffmpeg]
Is this status still the same? Do we still need to compile ffmpeg by hand if we want x264?
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Aug 9, 2011
First when trying to play some video Totem (as was set as default application) asked about missing decoder then offered installing of gstreamer-version-xx, but it couldn't as described below. I removed Totem and installed MPlayer and Gnome-MPlayer interface and everything is perfect in regard of playing video files
Now I wanted to install other package and it again needs this gstreamer0.10-ffmpeg package:
Depends: gstreamer0.10-ffmpeg but it is not going to be installed
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Jan 12, 2015
I use ffmpeg to covert video files for the net.
Code: Select allffmpeg -i infile -vcodec libx264 -vpre ipod640 -b 250k -bt 50k -acodec libfaac -ab 56k -ac 2 -s res.mp4
which works good. I was wondering if I could use larger resolution presets, but
find /usr -iname '*.ffpreset' only gives
#/usr/share/ffmpeg/libvpx-360p.ffpreset
#/usr/share/ffmpeg/libvpx-1080p.ffpreset
#/usr/share/ffmpeg/libx264-ipod320.ffpreset
#/usr/share/ffmpeg/libvpx-1080p50_60.ffpreset
#/usr/share/ffmpeg/libx264-ipod640.ffpreset
#/usr/share/ffmpeg/libvpx-720p50_60.ffpreset
#/usr/share/ffmpeg/libvpx-720p.ffpreset
with only 2 presets for libx264.
I installed ffmpeg from deb-multimedia. Is there a package which provides further preset files? There should be e.g. hq, max etc..
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Jan 27, 2011
I use Kino to transfer dv from my camera and also use it for video editing, but there are very few GUI options when it comes to transcoding the edited files into, say, h264. Kino is using ffmpeg, and I know there are a plethora of options. For instance, here is the output of the logfile from a file I made with h264 and the best quality available in Kino.#options: 768x576 fps=25/1 cabac=0 ref=1 deblock=0:0:0 analyse=0x1:0 me=dia subme=8 psy_rd=1.0:0.0 mixed_ref=0 me_range=4 chroma_me=0 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 chroma_qp_offset=-2 threads=2 nr=0 decimate=1 mbaff=0 bframes=0 keyint=300 keyint_min=25 scenecut=0(pre) rc=abr bitrate=2048 ratetol=2.0 qcomp=0.50 qpmin=2 qpmax=31 qpstep=3 ip_ratio=1.25 aq=1:1.00Frankly, I am not that impressed with the result, and would like to use settings that give a better result, e.g. adjusting bitrate and more passes
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Feb 4, 2015
I've been trying to compile OpenCV3 beta for Debian Jessie, but I can't figure out how to compile support for video I/O .Tutorials that can be found on-line usually use ffmpeg library, but as I found out Debian 8 replace this library with libav (?). Of course I found tutorials how to remove libav and install ffmpeg, but I would rather try to find some another way.
I use OpenCV3 beta from URL...
When I use this switch
Code: Select all-DWITH_FFMPEG=0 compilation succeed, but there is no support for video.
When I don't use that switch, then I get this error:
Code: Select allIn file included from /home/sehny/Dokumenty/opencv-3.0.0-beta/modules/videoio/src/cap_ffmpeg_impl.hpp:65:0,
from /home/sehny/Dokumenty/opencv-3.0.0-beta/modules/videoio/src/cap_ffmpeg.cpp:45:
/home/sehny/Dokumenty/opencv-3.0.0-beta/modules/videoio/src/ffmpeg_codecs.hpp:98:7: error: ‘CODEC_ID_H264’ was not declared in this scope
{ CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
[code]...
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Mar 24, 2011
I am running a video script on my server and I am very new to running a dedicated server and commands. Most of our site was setup but other and someone has broke something and no one seems to know how to fix.
Here is the issue. We run a script that uses these requirements
[Mod edit]Adult content Link removed
requirements
Now our server guy ran a update inside webmin for debian and now our videos still convert but wont make thumbs. Here is what he did.
Now updating libsmbclient ..
Now the AVS script wont make thumbs and webmin still wants to do 3 more updates that get unmet dependencies errors. Here they are when we try to run another update.
Building complete list of updates ..
Now what we need to do is either undo the update he already did or maybe get the one its asking for now to work but not sure which one will fix our thumb generating problem? Here is the error in the log file of the AVS script.
Seems stream 0 codec frame rate differs from container frame rate:
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Apr 9, 2011
I am running 64 Bit Debian, 6.0 install with VLC and libavcodec52, libavformat52, and libavdevice52 installed. I also installed recordmydesktop which creates an ogv file, and I would like to use VLC to convert the file to an MP4. Then I can add it to a project under Open Shot Video Editor.
I get the following errors when I try to convert the file: Streaming / Transcoding failed: It seems your FFMPEG (libavcodec) installation lacks the following encoder: H264 - MPEG-4 AVC (part 10). If you don't know how to fix this, ask for support from your distribution. This is not an error inside VLC media player.Do not contact the VideoLAN project about this issue.
Streaming / Transcoding failed: It seems your FFMPEG (libavcodec) installation lacks the following encoder: MPEG AAC Audio. If you don't know how to fix this, ask for support from your distribution. This is not an error inside VLC media player. Do not contact the VideoLAN project about this issue. I've used Google to search for the error message, searched on the forum.videolan.org, and searched on this forum. So far, I've not found a lead to the solution. What am I overlooking/missing?
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Mar 18, 2010
I'm wondering if anyone distributes mplayer, mencoder, and ffmpeg, up-to-date builds of each and their associated dependencies (x264, faac, xvid, etc).I had to compile all that stuff myself and fought with it, and finally got it working.
If no one distributes latest builds, then I was thinking of going further with what I've done to help others: virtualbox lenny and automated compiles of all packages and putting up the builds, with latest revisions of mplayer and ffmpeg from their source code repos. Using LD_LIBRARY_PATH to isolate the build so any modern linux can run the produced binaries, with only glibc as a dependency.
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May 11, 2010
I received a few updates today, one of which is mplayer. Now mplayer is broken and from what I can gather it's because it's incompatible with the version of ffmpeg I have installed. But the real problem is that mplayer and ffmpeg were originally installed from the debian-multimedia repo but the update for mplayer is from the debian repo. I can't go back because this new mplayer is dependent on libdirectfb-1.2-9 whereas mplayer from debian-multimedia is dependent on libdirectfb-1,2-0.
In case you want the error from mplayer:
mplayer: relocation error: mplayer: symbol codec_wav_tags, version LIBAVFORMAT_52 not defined in file libavformat.so.52 with link time reference
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Nov 20, 2010
I thought it was just a normal stuck pixel the first day I saw it, but then I noticed if I move opera around the screen they stay with opera. It doesn't occur with any other programs, only opera. These pixels also show up when I take a screenshot. Is there a way to get rid of these pixels (or whatever they are)?
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Jan 20, 2011
How do you create a 1x1 pixel jpg file in ubuntu?
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May 9, 2011
Does anyone know the pixel dimensions for the panels.I want to design a panel background image in gimp for the entire panel but I don't know how many pixels they are from left to right. I know (or I think) that they are 24 pixels from top to bottom but how many across?
I have designed images to use as panel backgrounds but they tile so it's like one consistent thing as I don't know the dimensions for the length of panels, only the 24 pixel height. I've attached a couple so try them out, they're pretty cool.
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Jan 28, 2010
I've just installed Ubuntu 9.10 on my wife's old notebook, a Sony Vaio PCG-FX705, by wiping the HDD (i.e. no more Windows ). The problem is that there's some weird display error that reminds of a TFT with pixel errors, although that's no the cause. I got a screenshot of it here (made with a digicam), and here is a close-up of it.
One thing I've noticed is that this error starts at the mouse pointer's tip and goes right when the computer is booted. Also, when using Blank Screen as screensaver, the error disappears once the screen went blank until I press a key or move the mouse, at which point the error will re-appear at the mouse pointer's current location. The only way I found so far to temporarily fix this problem is to change display resolution. It doesn't matter which resolution I use, all that matters is that I change it.
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Jun 3, 2011
How to determine the best sub pixel order of the screen?
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Jan 3, 2010
This is the first time I have pixel errors when using my setup in linux, have resently installed the debian squeeze rlz, with rglrx drivers from the debian wiki how to.
Now I have pixelerrors in pictures and they are static for the pictures aka, the pixels are static in the picture even if I move a webpage for instance.
Any buggreport on this? Or how to fix it, its hard to make a screendump but I could take a picture of the screen with a cam if someone like to see it
In win7 or ubuntu there is no indications of this problem.
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Jun 7, 2010
the tv card =37 pll=11 tunner=5 is recognised but not woking in fedora13dmesg gives
bttv0: unloading
Linux video capture interface: v2.00
bttv: driver version 0.9.18 loaded
[code]...
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Apr 24, 2010
Did anyone else notice in the 10.04 RC that it is very difficult to expand a window from the left or right side? The threshold is one pixel long before the arrow disappears.
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