[nichiren]

First of all, I'm not sure if this is XvBA specific issue, I'm posting it here since I did not have this issue when I was using vanilla XBMCbuntu Eden and I've used XvBA branch for a while now. I've noticed the problem only pretty recently, I've mostly been watching newer videos mostly in H.264/MP4/MKV and only during these few weeks picked up again some old shows in XviD+MP3 in AVI.

The problem is that the audio sync seems to be off more or less in every AVI video I've watched lately, barely noticeable in some and really annoying in others, ie. different in every file. This by itself wouldn't be too much of an issue if I it weren't for another problem I'm having. It appears that the audio offset setting in OSD Audio Settings menu doesn't have any effect, I can set it to full 10 seconds delay/advance without any change in the audio/video sync.

Optimal solution would of course be if these older AVIs worked as well as new MP4/MKVs, but I'd be more than happy if I could just properly adjust the offset.

As for the setup I'm using, it's AMD Fusion (A8-3850) based hardware connected via HDMI straight to a flat TV.
Running XBMCbuntu (Oneiric), formerly official stable vanilla Eden, currently using ppa:wsnipex/xbmc-xvba. I've tried to use more up to date self-rolled fglrx drivers but as each has various kinds of playback issues, I've returned to using fglrx-updates drivers from oneiric-updates repository.

XBMC (hopefully) relevant video/audio settings:
Render method: auto detect
XVBA enabled
Adjust display refresh rate to match video: On
Pause during refresh rate change: 0.7
Sync playback to display: On
A/V sync method: Video clock(Drop/dupe) (though I've tried Audio clock, no effect)

Vertical blank sync: Always enabled

Audio output: HDMI
Speaker config: 2.0
DD (AC3) / DTS capable: Off
Audio output device: hdmi (ALSA)
Passthrough output device: (blank)

Further details follow.
advancedsettings.xml:

Code:

<advancedsettings>
  <loglevel hide="false">0</loglevel>
  <video>
    <!-- Compensate display latency (video lag). Latency is given in msecs. -->
    <latency>
      <!-- Global default display latency -->
      <delay>0</delay>
    </latency>
  </video>
  <gui>
    <algorithmdirtyregions>1</algorithmdirtyregions>
    <nofliptimeout>1000</nofliptimeout>
  </gui>
  <useddsfanart>true</useddsfanart>
  <cputempcommand>cputemp</cputempcommand>
  <gputempcommand>gputemp</gputempcommand>
  <samba>
    <clienttimeout>30</clienttimeout>
  </samba>
  <network>
    <disableipv6>true</disableipv6>
  </network>
  <lcd>
    <scrolldelay>4</scrolldelay>
    <rows>2</rows>
    <columns>16</columns>
  </lcd>
  <videodatabase>
    <type>mysql</type>
    <host>192.168.1.10</host>
    <port>3306</port>
    <user>herp</user>
    <pass>derp</pass>
    <name>xbmc_video</name>
  </videodatabase>
  <musicdatabase>
    <type>mysql</type>
    <host>192.168.1.10</host>
    <port>3306</port>
    <user>herp</user>
    <pass>derp</pass>
    <name>xbmc_music</name>
  </musicdatabase>
  <pathsubstitution>
    <substitute>
      <from>special://masterprofile/Thumbnails/</from>
      <to>smb://herp:[email protected]/Media/xbmc_thumbnails/fusion/</to>
    </substitute>
  </pathsubstitution>
  <videoextensions>
    <remove>.rar|.001|.zip|.bin</remove>
  </videoextensions>
<musicextensions>                                                                                                                    
    <remove>.rar|.001|.zip|.bin</remove>                                                                                                    
  </musicextensions>
  <pictureextensions>                                                                                                                    
    <remove>.rar|.001|.zip|.bin</remove>                                                                                                    
  </pictureextensions>
</advancedsettings>

xorg.conf:

Code:

Section "ServerLayout"
        Identifier     "aticonfig Layout"
        Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Module"
EndSection

Section "Monitor"
        Identifier   "aticonfig-Monitor[0]-0"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
EndSection

Section "Device"
        Identifier  "aticonfig-Device[0]-0"
        Driver      "fglrx"
        Option      "Capabilities" "0x00000800"
        Option      "TexturedVideoSync" "off"
        BusID       "PCI:0:1:0"
EndSection

Section "Screen"
        Identifier "aticonfig-Screen[0]-0"
        Device     "aticonfig-Device[0]-0"
        Monitor    "aticonfig-Monitor[0]-0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

.asoundrc:

Code:

pcm.!default {
    type plug
    slave {
       pcm "hdmi"
    }
}

Mediainfo from a video with noticeable audio offset, will post more later when I've got more time if needed:

Code:

General
Complete name                            : Angel - 5x11 - Damage.avi
Format                                   : AVI
Format/Info                              : Audio Video Interleave
File size                                : 315 MiB
Duration                                 : 42mn 30s
Overall bit rate mode                    : Variable
Overall bit rate                         : 1 035 Kbps
Writing application                      : HUH?

Video
ID                                       : 0
Format                                   : MPEG-4 Visual
Format profile                           : Simple@L3
Format settings, BVOP                    : No
Format settings, QPel                    : No
Format settings, GMC                     : No warppoints
Format settings, Matrix                  : Default (H.263)
Codec ID                                 : XVID
Codec ID/Hint                            : XviD
Duration                                 : 42mn 30s
Bit rate                                 : 844 Kbps
Width                                    : 640 pixels
Height                                   : 352 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 23.976 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.156
Stream size                              : 257 MiB (82%)
Writing library                          : XviD 1.0.0 Beta3 (Selam) (UTC 2003-12-27)

Audio
ID                                       : 1
Format                                   : MPEG Audio
Format version                           : Version 1
Format profile                           : Layer 3
Mode                                     : Joint stereo
Mode extension                           : MS Stereo
Codec ID                                 : 55
Codec ID/Hint                            : MP3
Duration                                 : 42mn 30s
Bit rate mode                            : Variable
Bit rate                                 : 178 Kbps
Minimum bit rate                         : 96.0 Kbps
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 KHz
Compression mode                         : Lossy
Delay relative to video                  : 384ms
Stream size                              : 54.0 MiB (17%)
Alignment                                : Aligned on interleaves
Interleave, duration                     : 24 ms (0.58 video frame)
Interleave, preload duration             : 920 ms
Writing library                          : LAME3.92
Encoding settings                        : -m j -V 0 -q 2 -lowpass 21.1 --vbr-old -b 96

I'm stumped here, anyone got an idea where to start poking?