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Audio out of sync after fast-forward on latest nightly
Posted: 02 Mar 2014 17:31
by tranle
On the latest nightly build after you fast-forward, the audio seems to be delayed. And it is cumulative, so if you click once fast-forward it is delayed 1s, after 10 fast-forward it would be 10s.
The last build that is working fine for me is: vlc-2.2.0-git-20140203-0402-win64.exe
And all the builds after that one has the sound problem.
Thanks.
Re: Audio out of sync after fast-forward on latest nightly
Posted: 02 Mar 2014 20:00
by Rémi Denis-Courmont
No matter how many times I seek forward, the time correlation of audio and video seems the same to me.
VLC keeps 2 seconds internally at most, and requests Windows do the same, so 4 seconds is the theoretical worst delay. So I don't think it's even possible to experience 10 seconds delay, unless a filter or device driver is broken.
What's your OS version and audio hardware?
Re: Audio out of sync after fast-forward on latest nightly
Posted: 02 Mar 2014 20:42
by tranle
I am running on Win8.1 with Creative Soundblaster ZxR, Cpu: I7-3770K
I will try to find a different machine and re-test it to see if it is something specific to just that machine.
Re: Audio out of sync after fast-forward on latest nightly
Posted: 02 Mar 2014 21:09
by tranle
So I just tried a new test (different hardware but same windows) on a notebook Lenovo T400s with also Win8.1 and the builtin speaker and it has the same problem.
And delay that I mentioned in my first message was a bit exaggerated, it must be around 0.2 seconds.
The way I did the test was to take a TV recording .tp
mediainfo says it is:
Complete name : G:\Downloads\The Vampire Diaries-140227-2000.tp
Format : MPEG-TS
File size : 6.09 GiB
Duration : 59mn 56s
Overall bit rate mode : Variable
Overall bit rate : 14.6 Mbps
Video
ID : 2176 (0x880)
Menu ID : 5 (0x5)
Format : MPEG Video
Format version : Version 2
Audio #1
ID : 2177 (0x881)
Menu ID : 5 (0x5)
Format : AC-3
Format/Info : Audio Coding 3
Then I fast forward using multiple: <CTRL-Right-Arrow> (I think it jump 2 minutes)
After 10 or more jumps you will notice that image of people talking is not synchronized to the audio you are hearing.
Out Of Control
Posted: 03 Mar 2014 14:00
by Ludrax
After 10 or more jumps you will notice that image of people talking is not synchronized to the audio you are hearing.
here same with singing
Code: Select all
core warning: playback way too late (5383116): flushing buffers
core warning: playback too late (5383116): up-sampling
core warning: playback way too late (5383116): flushing buffers
core warning: playback too late (5383116): up-sampling
Re: Audio out of sync after fast-forward on latest nightly
Posted: 12 Mar 2014 21:47
by Rémi Denis-Courmont
Flushing the buffers works fine here. If the problem still occurs with builds from March 13th onward, consider filing a bug with full debug logs.
Jump
Posted: 13 Mar 2014 22:28
by Ludrax
now is even worse
Code: Select all
wasapi debug: buffer size : 96000 frames
wasapi debug: maximum latency: 10666600 ns
wasapi debug: default period : 10000000 ns
wasapi debug: minimum period : 3000000 nsCode: Select all
core debug: Stream buffering done (315 ms in 15 ms)
core debug: End of video preroll
core debug: Received first picture
core debug: Decoder wait done in 95 ms
core debug: playback too late (13087498): flushing buffers
wasapi warning: cannot reset stream (error 0x0)
core warning: playback too late (13087500): up-sampling
mmdevice debug: state changed: 1
core warning: playback way too late (13092499): flushing buffers
mmdevice debug: state changed: 0everything is fine until seek...
Re: Audio out of sync after fast-forward on latest nightly
Posted: 15 Mar 2014 18:11
by tranle
Flushing the buffers works fine here. If the problem still occurs with builds from March 13th onward, consider filing a bug with full debug logs.
I have just tried it with the build: vlc-2.2.0-git-20140315-0402-win64.exe
After you fast-forward / skip you get these warnings:
Code: Select all
core warning: early picture skipped
ts warning: discontinuity received 0xd instead of 0x2 (pid=1986)
ts warning: discontinuity received 0x6 instead of 0x0 (pid=1984)
core warning: buffer too late (-59495067 us): dropped
core warning: buffer too late (-59463067 us): dropped
core warning: buffer too late (-59431067 us): dropped
core warning: buffer too late (-59399067 us): dropped
But it recovers and there no delay in the audio. Thanks.