Majority of the videos I play with VLC the audo is out of sync, I have to delay it about 400ms to sync it. This only started happening after I upgraded to 10.04 64bit ( from 32bit ). Could it be a bug in the version of VLC I'm using (1.1.10)?
View 2 RepliesAudio sync method. "Stretches/squeezes" the audio stream to match the timestamps, the parameter is the maximum samples per second by which the audio is changed. -async 1 is a special case where only the start of the audio stream is corrected without any later correction.Searching the net makes one believe that this command is just some sort of magic.People just put it in the line and it just works. Isn't that nice?
It says nothing about how to change the TIME the audio starts syncing. Like do I want it to start 5 seconds delayed? Or what about 5 seconds sooner?What if the audio gets more out of sync as the video goes on? Can I slip it a little at a time? What? No magic?No one mentions a file that already has badly synced audio.So what -async 1 really does is simply start the audio at the beginning of the file. LIKE AS IF THAT ISN'T STANDARD PROCEDURE?So what is the exact solution to syncing a messed up video? And why can't it just do the proper "timestamp" sync in the first place?No docs, no info and you are left out in the cold.
i got all codecs from. ubuntu restricted software package. and i CAN play videos but with very bad quality. i cant even think of playing hd 1080p videos ..so lagy and out of sync.maybe the problem is with drivers for my ati mobility radeon hd 4250 ..i tried ati/amd proprientary fglrx graphic driver but everything gets worse .. when i move windows or drag and drop something everything is so slow, and video playback quality does not get any better ..maybe i need to install this :[URL]... but i have no idea how to do that
View 1 Replies View RelatedHere is my problem. Just installed Ubuntu 10.04 with Rivendell radio automation software built in (RRAbuntu). I installed it on an older machine, an HP XT919 (I know it's a bit older, but everything runs fine EXCEPT)...No audio. Audio was fine when I ran the live CD. I first installed Ubuntu 9.04 and had audio, but it kept locking up. I then installed 10.04 with Rivendell. No audio on CD's, no audio on Videos, nothing. I already ran terminal and raised all the levels in alsamixer. What else may be the problem?
View 3 Replies View RelatedI've upgraded Ubuntu 10.04 to Ubuntu 10.10 yesterday and I'm experiencing some issues now.
Audio is out of sync for all videos I'm trying to watch in VLC (sync was 100% fine in Ubuntu 10.04).
I was watching videos with audio literally minutes ago, and all of the sudden my laptop has absolutely no sound. I have no idea what could have caused it. I just ran a quick update and restarted, didn't fix it. I also went under Preferences > Sound > Hardware and did a speaker test, no sound. What could have possibly happened? Is this a common issue? Is my integrated audio burnt out or something? (No, I don't have mute on.)
View 4 Replies View RelatedI watch alot of news videos and within 1 - 2 minutes the video and audio become out of sync. The video is lagging the audio. I'm using 10.10 32 bit with Shock Flash 10.1 r102 on Firefox. Will the 10.2 beta flash fix this problem?
View 2 Replies View RelatedI put all my dvds on my "media center" by converting them to .MP4 with handbrake.
Recently I saw that with a MKV file you could do soft subtitles. I tested a part of a movie, and the audio and video are very out of sync.
With MP4/burned in audio everything is ok...
Edit: Ow yes I'm using XBMC for playing it. MP4 + MKV files are both H.264, they have the exact same settings except for subtitles...
Weirdly Enough: I tried another video and at this one the audio is in sync....
After upgrading to 11.04, video and audio are out of sync by about one second when playing movies in VLC, or opening a clip on the web. Reinstalling does nothing.
View 9 Replies View RelatedI am burning DVD iso's and they seem to work great I have video output and sound output however as the film goes on the audio gradually becomes more out of sync but if I hit the rewind button on my remote and then play the sound is in sync again for a few minuets. I am using DeVeDe and Gnome Baker to create and burn my iso images to disc and they work great on the computer but not so great on my dvd players I am burning onto Verbatim DVD-R using Ubuntu 10.04 lucid lynx.
View 3 Replies View RelatedI have found that if I change the FPS of a video, the audio is out of sync.
Is there a way in mencoder to have it correct this, and maintain the correct sync?
I don't think it is just a matter of audio/video delay. I have tried many times to correct this via that method, and it doesn't come close. Although, if I encode the video to another format, but with the original fps, the audio is sync'd.
V.L.C. and all others - but Totem - video players that I have installed have audio out of sync. This occurs in both D.V.D. and .mkv & .avi. I had this problem with V.L.C. 1.1.10 & now with 1.1.11. I do not think that this is a problem with V.L.C. since I have had the same issue occur with gnome-mplayer. I tried to downgrade gstreamer*, and that did not correct my problem. It shouldn't be a problem with libdvd* since the problem still occurs with files on my drive. Handbrake doesn't fail to rip D.V.D correctly.
Because of all of this I figure that it must be a system library that Totem and HandBrake don't use ( or bundle most likely in the case of HandBrake ).I am using Fedora 15 x86_64 with all updates to date.
How to sync audio and video which is captured from a aeperate camera device and a microphone,how to relate timestamps to audio and video to syncing.I m capturinfg video at 30fps and audio 160 samples everytime so how these 2 should be related to sync and playback at a time
View 1 Replies View RelatedI'm able to get HDMI audio/video perfectly when I'm playing a dvd on mythbuntu. However, If I try to play the ripped version or any other video that is on the hard drive, I get no Audio?
I've checked alsamixer to make sure the device isn't muted.
If I use vlc media player I don't have any audio either. Is there a way to enable hdmi audio as default?
I am having a little problem with my flash player, the video plays fine but I can't get any sound. The sound card works properly with any other application, such as Amarok, but not with flash videos and my hardware is mostly Intel witch is linux-friendly from what I know, so I guess that it isn't a driver problem. Therefore, I switched from windows to linux only a couple days ago, so it may be a newbie issue as well.
I'm using Kubuntu 10.04 64-bit with HDA Intel audio chip set with flash player 10.0.45.2. If anyone have a solution/explanation,
I am attempting to backup DVDs that I own to .iso format so that I'm able to watch them using xbox media center. I've simply been copying the entire DVD to my HD in .iso using brasero.When I watch the .iso file in XBMC, the audio is a fraction of a second ahead of the video. The gap between the audio and video doesn't seem to change over the duration of the clip.
What are the likely causes of this issue? I've read that it could be a slow processor, little ram, or inadequate video card. If it's indeed a hardware issue, I suppose I'm SOL with my current laptop: a 2006 dell with a core 2 duo processor, 2GB ram, and a middle of the road video card at that time.Is there any software tweak I can explore to get the .iso file to sync properly?Also, I know it's customary for posters to list their system specifications, but I don't know how to call up my software or hardware setups.
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
I've been trying to use cheese to record greeting from my kids to grand parents etc. But every time I record a video, the video is choppy and the audio sync is off. I've used the one in the (F11) repos and built it from source. It behaves the same using other distros as well. Is this par for the course with cheese, or is it my hardware?[URL]... Any other applications/methods to record audio & video while providing a video.
View 2 Replies View RelatedI used this code ffmpeg -i video.flv -r 12.5 -s 320x240 -vcodec mpeg -ar 22050 -ab 128k -acodec ac3 out.mp4 for converting a flv to mp4. The output is all right, but in the ipod nano 3g 4GB it has no sound. What's wrong? Maybe I put the wrong -acodec ac3 options?
Code:
-acodec libfaac
Code:
-acodec aac
gives me
Code:
Unknown encoder 'libfaac'
I have a nokia phone with symbian. I installed the divx player and sample videos are ok, but when I try to encode other videos I get no sound.
I tried to recode a working with avidemux and it stoped working.
I have a couple of .avi clips in which the sound plays 2 seconds before the video, so I need a software that can re-sync the sound correctly with the video with affecting the video/audio quality, what program can I use? What is the name of this feature in video editing programs? I am using Ubuntu 10.04. I noted that the Multimedia & video forum have only threads about problems in playing videos & cards drivers problems.
View 3 Replies View Relatedmy goal is to record video using a canon powershot camera, edit the avi file on my ubuntu 10.04 computer, then upload the rendered file to videos.
problem is that when i cut the video, the audio is no longer in sync with the video, it's off by about 1-2 seconds. this happens with both openshot and pitivi, so i suspect that it's caused by a bug with the codec. (files are avi with mjpeg codec). after searching launchpad, this is apparently a "known issue". that's great but for now i need a workaround.
i do have an old g4 powerbook with imovie hd v6 on it that i can use, but i'd prefer not to because:
1. the powerpc mac is much slower than my new dual core laptop
2. imovie compresses my videos too much so the rendered file is lower quality
3. i simply prefer openshot to imovie
i was thinking of preprocessing my avi files by converting them to another format with a non-buggy codec on linux. i downloaded ffmpeg, but not sure how to use it and what format to use. would mpeg2 be a safe one to use?
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.
So I got myself a USB capture card (EasyCap) to use for capturing gaming, digitizing my kids' old VHS movies, etc. It works fine, I've been using VLC to view and record stuff from it, but I've noticed one issue. When recording streams via VLC, even with no other programs running to give VLC as much CPU time as it wants, the audio slowly falls out of sync. I've tried the MP4 (H264/MP3) container and the OGG (Vorbis/Theora) container.
Early on you can't hardly tell, but the further into a movie you get the more out of sync the audio gets, so that by the end of the movie the audio is a good 1-2 seconds off. It's not a set amount either so I can't just split the audio to a separate file then shift it one direction or the other to make up for the difference, because like I said, the offset starts out at nothing and gets progressively larger as the movie goes on. When I select "display locally", the video/audio that is displayed stays in sync, only the video/audio that gets committed to the output file falls out of sync, and it doesn't matter if I play the file with Totem or VLC.
i've been experiencing an issue with audio playback for certain flash videos that stream from the web. most play smoothly, like the videos at videos. others have this strange background noise that is only present when there is audio (usually on news websites that host their own videos). when there is sound, there is a strange stuttering noise that disappears during the silent pauses.
here's a perfect example: [url]
the videos video at the top plays just fine. if you scroll down and watch the other video in the small box, you'll hear the stuttering. i have fedora 14 kde, adobe flash player 64 bit preview release 3 and rpm fusion codecs installed. the problem is also present in fedora 14 with gnome, same setup. the problematic videos play without the stuttering in ubuntu.
How can one adjust/sync audio and video in gnome-mplayer while watching video
The following is my configuration :-
OS : Opensuse 11.2
Media Player : gnome-mplayer 0.9.9
I am trying to use ffmpeg and mencoder to slice a portion of my video out but the audio is always 2 seconds out of sync.
ffmpeg -i bird.avs.MP4 -acodec copy -vcodec copy -ss 00:08:40 -t 00:01:00 test.mp4
mencoder -ss 00:08:40 -endpos 00:01:00 -oac copy -ovc copy bird.avs.MP4 -o test.mp4
mencoder -ss 00:08:40 -endpos 00:01:00 -oac copy -ovc copy -noskip bird.avs.MP4 -o test.mp4
[Code]....
I've been playing around with the latest RC of 11.4. Overall, it works great, but just have 1 issue. No flash videos have audio. Video works just fine. I've tried installing both the flash-player package so that it loads the official 32-bit plugin through ndiswrapper, and tried downloading the Adobe Square 64-bit plugin and installing it. Doesn't make a difference, either way I have working video but not audio. Audio itself on the laptop works with no issues, I listen to Amarok all the time on it. Laptop in question is a Dell Latitude E5500. I've also had Debian Wheezy and Kubuntu 10.10 on here, both had no issues.
View 6 Replies View Relatedhere's some background info: purchased a brand new netbook last week (samsung n130) and thought i'd set up a dual-boot to accompany the pre-installed windows xp sp3, and after a bit of research i decided upon installing ubuntu as my preferred linux os, which i believe at the time was and still is version 10.10.
but the problem is: when i attempt to watch flash videos (from videos for example) the video streams fine, but the audio is very jumpy and skips back and forth every few seconds. occasionally there are periods of say 10-15 seconds where the audio is ok. the problem exists on both firefox and chrome, and is exclusive to ubuntu. keep in mind that i'm an absolute novice when it comes to linux/ubuntu, etc.
I'm a new openSUSE 11.2 user and lately I've been getting repeated notifications from KDE saying that "the audio playback device HDA Intel(AD198x Analog) does not work" I get audio if I stream videos off the Internet but Amarok can't seem to play audio.
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