VLC 2.1.0 - stuttering x264 playback

Alien Bob · 01-24-2014, 04:00 PM

Quote:

Originally Posted by rigelan

Regarding VLC & ffmpeg

Does VLC use a compiled-in ffmpeg library to decode? Yes.
Does it only need ffmpeg during compilation? It is built into my VLC package, so an external ffmpeg is not needed, and not used if present.
I use ffmpeg on my system, would this be interfering with the VLC in any way (in the current way it is compiled)? No.

rigelan · 01-24-2014, 09:20 PM

Okay Thanks.

bmarley83 · 01-24-2014, 09:23 PM

I think its only needed during compilation.

Oh, he beat me to it.

aaazen · 01-24-2014, 11:53 PM

Originally this posting was going to explain how well setting the audio device to stereo (2.1, front speakers) works as a work-around for vlc 2.1.12

But after setting the device in the "settings", saving the settings and restarting...
the video looks fine but the sound is distorted and extremely loud.

So again I'm sticking with vlc 2.0.9 for now.

vnovak · 01-29-2014, 06:31 AM

So today I did another build of vlc 2.1.2-build 3 just to see what happens if I disable sound as wrote comet.berkeley. And yes,video playback is then fluent.
Only switching sound device to front speakers doesn't solve the situation,but my subjective feel is that stuttering a bit dropped to a lower level.
"--disable-decoder=dca" in ffmpeg's configure doesn't help (in my case).

aaazen · 02-03-2014, 04:19 PM

Searching for answers on the VLC forum, one developer tends to think it is a hardware problem:
https://forum.videolan.org/viewtopic.php?f=13&t=116899

There are two sound cards and I am using the second (ACL662) card:

Code:

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Generic_1 [HD-Audio Generic], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

To get the second card to be the default for alsa, I created a
/etc/modprobe.d/soundcard.conf file:

Code:

options snd-hda-intel index=1,0

And then the sound card order is changed to put the ACL662 device first:

Code:

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Generic_1 [HD-Audio Generic], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Does anyone else have stuttering problems with vlc and two sound cards?

aaazen · 02-04-2014, 04:02 PM

This is not a hardware problem.

I just went back and tested both 2.0.8 and 2.1.2-3alien on 3 different platforms.

One intel pentium 4, one dual-core atom and 1 amd quad core system.

They all 3 have the exact same problem, where 2.0.8 works fine and 2.1.2-3alien (2.1.x) fails.