Fedora :: Video Is Choppy And The Audio Sync Is Off?
May 18, 2009
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.
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Jul 9, 2011
Audio 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.
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Mar 10, 2010
I switched from XP to Ubuntu a few days ago and I'm having a hard time getting flash to work properly in firefox. I can play videos and music in a non-flash format just fine, but flash videos play without sound and really choppily.
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Sep 28, 2010
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
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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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Dec 2, 2010
I 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?
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Mar 29, 2011
I 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....
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May 27, 2011
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.
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Jul 4, 2010
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
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Jan 7, 2010
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]....
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Aug 9, 2010
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.
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Aug 31, 2010
my 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?
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Jun 7, 2011
to start off, i'll post the specs of the machine:
dell inspiron e1505
3.2 gb ram
1.86 ghz intel core duo
ati x1400 gfx
opensuse 11.4 kde 32 bit.
okay, here are the details: can't play any audio with amarok when desktop effects are enabled because the minute a window is moved, it will distort the audio. even when disabling desktop effects, some applications still cause this. can't play videos videos even with desktop effects disabled because of the same reason.
i just switched from ubuntu and when i ran version 11.04, i had to disable kms to do anything. i tried on opensuse 11.4 and the audio was flawless but the gfx went all to hell.
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Nov 22, 2009
I 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.
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Jul 24, 2011
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.
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Apr 3, 2010
I'm using 9.10 on acer aspire one (not the netbook remix).im using the default messanger client empathy.everything else works fine but when i try to video chat the video chat begins but if the other person even moves a litte or even nods his head then the video becomes so choppy that u cant see anything and then after 5 min comes back to normal for a second or two.i have all the latest updates and gstreamer0.10-ugly-multiverse which is required for video chat b/w empathy and gtalk.
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Nov 22, 2010
Just installed Ubuntu 10.10 on an old Dell Dimension 8400 with an ATI RV370 Radeon X300 video card and 512MB of Ram. The video seems to go very fast and skips. I followed the Comprehensive Multimedia & Video Howto but still have the same issue. I have also read many posts but I have trouble understanding some of the responses. Could it be the low amount of RAM?
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Jan 23, 2011
When I play H.264 / AVC videos from my new camera in totem, the sound plays fine but the video looks like a slide show. I also tried it in xine, the video plays better, but the audio does not play. (the video seems to play in slow motion. the files are saved as *.mp4, and are the same resolution as the *.mp4 files from my old camera which play fine in totem. When I look at the properties of the files, the new ones say that the codec is H.264 / AVC and the ones from my old camera say that the codec is MPEG-4 video. the frame rate is the same for both files.
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Dec 4, 2010
I am having audio issues in my host operating system (Ubuntu 10.10 64bit) when running my Virtual machine (Windows Server 2008 R2) through VirtualBox. At the moment I need the virtual machine to run all the time my issue comes when trying to play a movie on the host OS, video is fine but audio is choppy to the point of not understanding what is being said.
I used gstreamer to test the audio outputs while the VM was running, ALSA is choppy but Pulseaudio is clear. I then change VLC to pulseaudio and I get no output what so ever. The VM does not need sound so I have it disabled in VirtualBox's settings (I have tried enabled, same issue).
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Oct 17, 2010
When I play large HD videos in mplayer, the video and sound frequently get out of sync, and the video plays a little strangely (occasionally speeding up and occasionally slowing down).
I think it's because mplayer is only running on a single core. As I've got a quad-core processor, it seems inefficient. I've seen that there is theoretically a way to get mplayer to work with multicore setups, but it requires compiling with different options. That'd take me a little while to work through.
Ideally there would be a pre-compiled version in the software centre, or a player which has support built in (again, ideally in the software centre). Is there such a thing available?
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Jun 19, 2010
I'm generally non-techy, but was able to do the install of Lucid on my iBookg4 ppc, and use terminal to cut/paste the fix for my airport extreme card off the ubuntu wiki. my current vexing problem is this: ALL video playback (mp4, .mov, swirly display thing when musicplayer is going, etc) is choppy looking. not pixilated, but kind of messily choppy & grated looking. I've searched all the forums & wikis ('natch) and cant find anything that describes this exact problem. is there a fix that dosen't involve confusing command line judo? something that wont require too much hand-holding? (I am def one of, "the rest of us" that ubuntu is for...)
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Aug 8, 2010
When I play streaming video on hulu or other sites it is choppy. However, the sound is fine. Video files play fine when I download them.I experience this problem in both Firefox and Chrome. I have a 10MB connection on other Linux desktops the streaming video is fine.I imagine it is a flash issue, but I have the latest flash v10.1.The other solution would be a video downloader for streaming video. I have not found one that works on Linux.
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Nov 4, 2010
I have Ubuntu 10.04 fresh install, when i watch you tube or other vids it gets real choppy in full screen, being new I have no idea what to do.
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Feb 14, 2011
I've got a Lenovo T410 with just the onboard intel graphics, with the i7 620m and 10.04 64-bit installed.I've also added the xorg-edgers ppa and installed all the packages from there. When I try to watch a 720p video full-screen in ..... it is unwatchable, just too choppy. I haven't been able to find an answer to this elsewhere. I've tried disabling the hardware acceleration in flash but that does nothing.
It seems that the driver in use is i915. Is that the driver that should be used? From lspci: 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
Subsystem: Lenovo Device 215a
Flags: bus master, fast devsel, latency 0, IRQ 34
Memory at f2000000 (64-bit, non-prefetchable) [size=4M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 1800 [size=8]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
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Jul 11, 2011
I'm running Ubuntu 11.04, have 4GB of Memory, and an AMD Phenom II X4 840 Quad Core processor.When I play Hulu Desktop the video is choppy.Now, the odd thing is that I had this problem before. It's the whole reason I upgraded my processor. When I upgraded I noticed an improvement, but it was still a little choppy. I then went to the Adobe site and got the latest version of Flash, and lo and behold, I could watch Hulu Desktop on HD quality with no problem!
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Aug 23, 2009
To get multimedia working, or explain what I'm doing wrong.
The problem is that none of the video players doesn't play video, they show only black window and play audio.
I have Fedora 11 Leonidas, fully up-to-date.
I have installed rpmfusion and livna repository.
I have installed following packages:
When I try to play video with totem, it doesn't output any error, but just doesn't play video.
with mplayer:
xine and kaffeine just say:
vlc:
I tried several different files, which works perfectly in windows and ubuntu.
I installed windows binary codecs for mplayer to /usr/lib/codec/
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May 26, 2010
Im running Xubuntu 9.10 on my compaq v2000 laptop. My problem is that the video stream playback is very choppy. I have tried the method found here [url] but when i get to the part where I have to type "echo base....." when i hit enter my terminal replies with "bash: echo: write error: Invalid argument"...How to fix this choppy video streaming playback...
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Jun 14, 2010
I just upgraded from Karmic to Lucid. I've never had problems with playing video files before, but now that I've upgraded to Lucid, I am, regardless of Compiz and other visual effects being on. What I know of my hardware specs are in my sig. I have "NVIDIA accelerated graphics driver (version current) [Recommended]" activated (and in fact, one of my reasons for upgrading was the supposedly improved NVIDIA drivers in Lucid). VLC, MPlayer and Totem are all choppy playing .avi's: they play smoothly for several seconds, then start skipping (audio and visual, separately), though VLC does so less violently than the others. Similar problems, though slightly less severe, with watching flash movies in chromium.
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Oct 1, 2010
Specs:
AMD Quad Core
8GB RAM
HD3200 ATI Graphics (onboard)
1920*1080 resolution via VGA.
Whenever I play flash video or a video in VLC the pictures seems "choppy" and slow as if it was laggy. What could be causing this? I am guessing its a video issue? Maybe something todo with refresh rates and stuff like that.
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Oct 3, 2010
Just one little issue. I have noticed the video is choppy in full screen mode. I have found this problem discussed on other forums but have had no luck. I installed wubi over top of windows xp. My computer is a P4 3 Ghz with 1.5 G of ram. 80 Gig hard drive. I currently do not have a video card installed.
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