Closed Bug 482641 Opened 16 years ago Closed 16 years ago

audio skips badly on ogg playback with medium-sized video (linux only)

Categories

(Core :: Audio/Video, defect)

Product:
Core
Component:
Audio/Video
Version:
1.9.1 Branch
Platform:
x86
Linux
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED FIXED

People

(Reporter: blizzard, Unassigned)

References

(
URL
)

Details

When playing the URL above video is reasonably smooth but audio skips out every second or so. Reproduced on Fedora 8 in a VMWare VM and on Ubuntu 8.10 on hardware. Seems to work OK on my OSX box.
Plays fine for me on Arch Linux. What sound platform are you using? I'm using Alsa on Arch.
Fedora 8 uses pulseaudio. Pretty sure that Ubuntu 8.10 does too.
Chris B, what kind of CPU use are you seeing during playback? It's actually a fairly demanding video: 720x480 at 30fps (1024kbps), but it's being scaled down to 480x390 with dimension attributes on the element. My Core Duo 1.6GHz running Fedora 10 (with PulseAudio disabled) isn't fast enough to play the video back without stuttering audio unless I set width/height on the <video> even smaller than 480x390. 240x160 works fine, and 480x390 and 720x480 work if I open another tab and leave it in the foreground. Are you seeing something similar? If so, the fix is probably solving bug 474748 and bug 474749.
It doesn't keep up in vmware on my mac and on my native linux machine it's barely keeping up (CPU usage is around 95% or so.) I'm going to guess this is bug 474748. Marking as such.
Depends on: 474748
That native machine is a mac mini with two cores running at 1.8Ghz. It does skip from time to time, too. Just very rare.
same problem here: * debian / alsa * dual core intel - 1.4Ghz. CPU usage: 80% Audio *and* video skip each second.
Now that bug 474748 and bug 474749 have had fixes landed, this bug should be fixed. Can the people that were seeing this please try a recent trunk build (or a 1.9.1 branch build after 11th April) please confirm that this is resolved?
A/V sync is a little off but the audio doesn't skip anymore, which makes it watchable. Declaring this bug fixed.
Status: NEW → RESOLVED
Closed: 16 years ago
Resolution: --- → FIXED
Can you give more detail on the A/V sync issue? Is the video lagging or the audio? Does it start off ok and drift or start off wrong? Linux? PulseAudio?
Testing on F8 in a VM with PulseAudio: So watching it the video gets a _little_ bit ahead of the audio from time to time. It's enough so you notice something is wrong but isn't too bad. And it does not drift. I suspect that the dropping frames is adding to the effect. But honestly for playing such a big video it's doing pretty well. Totally watchable. Testing on F10 on native hardware with PulseAudio: Works fine - synced well, keeping up. No drift that I can see. Same on Mac. Note that I'm using 1.9.1 here.
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