Learn Multimedia Framework(How Audio and Video playback occurs)
location: linuxquestions.com - date: June 28, 2013
I am searching for a good content on web for last few days to learn multimedia working. There are lots of documentation regarding it. But I want to setup a programming environment on my linux machine where I can see what I am learning i.e if I am learning about metadata of an mp3 file then I should be able to write a code using some API or Framework and work on it to extract metadata myself. I have used SDL API earlier, if there is another better API you can think please tell me as I will be working on Android and if some API is more close to this OS that I can setup on my machine then it will be good, otherwise I am going with SDL.
If you have any suggestion then please tell me.
VLC showing green screen during video playback; Audio works fine
location: ubuntuforums.com - date: June 30, 2013
I'm having an issue with VLC, Dragon Player, and Kamoso (KDE Webcam) where all are displaying green screens. This seems to be a display issue rather than a function issue; Webcam will take pictures, and I can listen to movies in VLC and Dragon. VLC snapshot also works and will return a screenshot of the movie. I was having this same issue in Ubuntu as well. I've checked to make sure all my codecs are up to date, and the System76 driver seems to be functioning normally.
This is more of an annoyance for me, as I don't watch many movies on my system, but I'd like to get it sorted. Has anyone else run into this issue, and if so, how did you fix it? Thanks very much!
System: Gazelle Professional (gazp9); Kubuntu 13.04; Intel HD Graphics 4600; IPS matte display
Disabling accelerated video output in VLC solved the problem, and video plays without an issue. In Kaffeine, editing the xine-config file to use the OpenGL video driver solved the problem. I still have not foun
Audio completely out of sync with video playback. (FFmpeg/Xine/VLC) 12.2/22.214.171.124smp
location: linuxquestions.com - date: February 3, 2009
Hello everyone. Well, I've been in Slack-paradise up until this point!
Been having no end of trouble with getting video playback to work properly. Either the video falls behind or the avi, et. al gets ahead. I've googled extensively, but still can't seem to find the issue. Using ffmpeg with the necessary codecs and sound-output is through alsa. Every player I've tried it with (Xine, gXine, VLC, Codeine) has fallen flat on its face. Mplayer won't install for some reason, saying it has an unmet dependency, which is actually met (cdparanoia).
Nothing seems to be especially strange in vlc's terminal output:
AMD HD Series Graphics Guide: Optimizing Video Playback for MythTV, Mplayer, & Others
location: linuxquestions.com - date: February 1, 2010
I originally created this guide on Ubuntu Forums' website under sports.car.guy. I am contemplating removing it from there thanks to an Op on a power trip and his treatment towards me. I tried to help someone, answered their question, and in the process stated how not searching could be why he received no reply and also how google is a great resource. I got written up for suggesting good habits when trying to solve a Linux problem, besides giving them the answer.
This noob did not like the response I gave or the one from another poster because we were the only two to reply and explained how it only really matters on the GPU itself not the card maker and the nVidia 8800 was well supported. So the noob blatently violated their COC went off about how we were jerks, etc. I replied that I gave him what he was looking for. I also stated because he brought up how he did search and found nothing that if he put in the GPU model and linux into a search engine it would come up, bu
no sound playback or video playback..on ubuntu 8.10
location: linuxquestions.com - date: April 20, 2009
Ok first...I started with a buzzing sound after updated codec to play mp3 using amarok....i have uninstalled amarok to try and get rid of problem but it did not help....next thing i tried change from alsa to oss...i got halfway there and i could not install file:///home/thelastquincy/Desktop/oss-linux-4.1-1052_i386.deb.....so i;m halfway between alsa and oss...i've tried going back to alsa but still no sound now...and i can't even play video...i get this when i click on the master volume [The volume control did not find any elements and/or devices to control. This means either that you don't have the right GStreamer plugins installed, or that you don't have a sound card configured. You can remove the volume control from the panel by right-clicking the speaker icon on the panel and selecting "Remove From Panel" from the menu.]
when i go to preferences and sound to try and test i get this..audiotestsrc wave=sine freq=512 !audioconvert ! audiosample ! gconfaudiosink: failed to
Video Playback on Blackberry 8830
location: ubuntuforums.com - date: June 5, 2008
Hey, I finally figured out how to do file transfers from my Ubuntu laptop to my Blackberry 8830 WorldPhone !!!
So here's the problem: Video will not play back.
I know that the Blackberry will only play .mp4 video, on windows I used the Blackberry manager app which in turn used Roxio to convert my avi files to mp4 on the fly while copying to the Blackberry. I followed a guide on the ubuntu forums to convert .avi to .mp4 using mencoder, but the file won't play. The Blackberry video player app just says "Loading..." and then after a minute it says "Error......."
It sees the file and tries to load it so I think the problem is the encoding, does anyone know how to encode an avi to mp4 so that it will play on the Blackberry?
All audio/ video running too fast (and no sound let me explain)
location: ubuntuforums.com - date: January 31, 2011
Hello there! Another mundane question:
When on YouTube watching a video or on VLC or movie player or rhythmbox there is no sound and the video plays at 2x or more speed. It was working before I restarted my computer so that must mean that one of the changes I made between then caused it, so:
I have messed about trying to install and remove desktop art plugin for rhythmbox, which, by the way, still isn't working so as an encore you could fix that for bonus points
I have also installed Compiz recently with the extras and something called subversion, which I apparently needed for the plugin...
If you need any more information then please ask and I shall set about finding it!
[SOLVED] ffmpeg audio/video sync issues
location: linuxquestions.com - date: October 20, 2013
I'm streaming to twitch.tv using the following code:
MPlayer Audio/Video out of sync
location: linuxquestions.com - date: September 24, 2005
Hi, I compiled the latest version of MPlayer(v1.0pre7try2) from source. And I downloaded the codecs from the MPlayer website, too.
Everything works as expected except this small irritation.
When I play a rmvb file, and try to fast-forward it with the "Page Up" button, the audio and video start to go out of sync and never come back. Luckily, if I watch it from the beginning to the end this problem doesn't happen. Xine works well, too.
I tried to specify these options and it works, but ugrily(it needs about 2 seconds to sync them back).
Bad video playback in Ubuntu
location: linuxquestions.com - date: January 21, 2008
When watching videos in VLC playback is not smooth. There is a thin horizontal line that flashes through the center of the screen. It usually happens during bright or fast-paced action scenes. It almost looks like a screen refresh problem but I don't think it is. Thats as best as I can describe it. It's watchable but very irritating. It is not a problem with VLC because every video player dose the same thing. I don't think its a codec problem (though it my be) because I see a similar issue with certain screen savers. I have a e-GeForce GS PCI Express Nvidia Card using the NVIDIA accelerated graphics driver (latest cards). Has anyone else seen this problem? is it a driver issue? is there a solution? I currently watch videos on Win XP and I want to abandon XP.
Thanks in advance.
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