Hi,
the problem is vlc starts playing a file fine but looses audio after some minutes of playback. I found a thread but unfortunately no solution.
This is the vlc log:
mkv debug: Event Key
main debug: removing module "float32_mixer"
main debug: looking for audio mixer module: 3 candidates
main debug: using audio mixer module "float32_mixer"
main debug: TIMER module_need() : 0.193 ms - Total 0.193 ms / 1 intvls (Avg 0.193 ms)
freetype debug: using fontsize: 45
mkv debug: Event Key
main debug: removing module "float32_mixer"
main debug: looking for audio mixer module: 3 candidates
main debug: using audio mixer module "float32_mixer"
main debug: TIMER module_need() : 0.181 ms - Total 0.181 ms / 1 intvls (Avg 0.181 ms)
freetype debug: using fontsize: 45
mkv debug: Event Key
main debug: removing module "float32_mixer"
main debug: looking for audio mixer module: 3 candidates
main debug: using audio mixer module "float32_mixer"
main debug: TIMER module_need() : 0.185 ms - Total 0.185 ms / 1 intvls (Avg 0.185 ms)
freetype debug: using fontsize: 45
mkv debug: Event Key
main debug: removing module "float32_mixer"
main debug: looking for audio mixer module: 3 candidates
main debug: using audio mixer module "float32_mixer"
main debug: TIMER module_need() : 0.187 ms - Total 0.187 ms / 1 intvls (Avg 0.187 ms)
freetype debug: using fontsize: 45
xcb_xv debug: display is not visible
xcb_xv debug: display is visible
main debug: auto hidding mouse
main debug: auto hidding mouse
xcb_xv debug: display is visible
main debug: auto hidding mouse
xcb_xv debug: display is visible
xcb_xv debug: display is visible
xcb_xv debug: display is visible
xcb_xv debug: display is visible
xcb_xv debug: display is visible
main debug: auto hidding mouse
main debug: auto hidding mouse
xcb_xv debug: display is visible
main debug: auto hidding mouse
xcb_xv debug: display is visible
xcb_xv debug: display is visible
main debug: auto hidding mouse
xcb_xv debug: display is visible
main debug: audio output is starving (23229), playing silence
main debug: audio output is starving (23235), playing silence
main warning: output date isn't PTS date, requesting resampling (49129)
main warning: output date isn't PTS date, requesting resampling (46978)
main warning: buffer is 72890 late, triggering upsampling
main warning: output date isn't PTS date, requesting resampling (47050)
main warning: timing screwed, stopping resampling
main warning: buffer is 119895 late, triggering upsampling
main warning: output date isn't PTS date, requesting resampling (46974)
main warning: audio drift is too big (166846), dropping buffer
main warning: audio drift is too big (143626), dropping buffer
main warning: audio drift is too big (120165), dropping buffer
main warning: output date isn't PTS date, requesting resampling (105996)
main warning: audio drift is too big (202919), dropping buffer
main warning: audio drift is too big (179699), dropping buffer
main warning: audio drift is too big (156479), dropping buffer
main warning: audio drift is too big (133259), dropping buffer
main warning: output date isn't PTS date, requesting resampling (105516)
main warning: audio drift is too big (215532), dropping buffer
main warning: audio drift is too big (192071), dropping buffer
main warning: audio drift is too big (168852), dropping buffer
main warning: audio drift is too big (145632), dropping buffer
main warning: audio drift is too big (122412), dropping buffer
main warning: output date isn't PTS date, requesting resampling (141286)
main warning: audio drift is too big (240456), dropping buffer
main warning: audio drift is too big (217236), dropping buffer
main warning: audio drift is too big (194016), dropping buffer
main warning: audio drift is too big (171555), dropping buffer
main warning: audio drift is too big (148336), dropping buffer
main warning: audio drift is too big (125116), dropping buffer
main warning: output date isn't PTS date, requesting resampling (153256)
main warning: audio drift is too big (255129), dropping buffer
main warning: audio drift is too big (231909), dropping buffer
main warning: audio drift is too big (208689), dropping buffer
main warning: audio drift is too big (185469), dropping buffer
main warning: audio drift is too big (162008), dropping buffer
main warning: audio drift is too big (138789), dropping buffer
main warning: output date isn't PTS date, requesting resampling (200101)
main warning: audio drift is too big (315625), dropping buffer
main warning: audio drift is too big (292405), dropping buffer
main warning: audio drift is too big (269185), dropping buffer
main warning: audio drift is too big (245965), dropping buffer
main warning: audio drift is too big (222504), dropping buffer
main warning: audio drift is too big (199285), dropping buffer
main warning: audio drift is too big (176065), dropping buffer
main warning: audio drift is too big (152845), dropping buffer
main warning: audio drift is too big (129504), dropping buffer
main warning: output date isn't PTS date, requesting resampling (223352)
main warning: audio drift is too big (329614), dropping buffer
main warning: audio drift is too big (306394), dropping buffer
main warning: audio drift is too big (283174), dropping buffer
main warning: audio drift is too big (259954), dropping buffer
main warning: audio drift is too big (236734), dropping buffer
main warning: audio drift is too big (213514), dropping buffer
main warning: audio drift is too big (191053), dropping buffer
main warning: audio drift is too big (167834), dropping buffer
main warning: audio drift is too big (144614), dropping buffer
main warning: audio drift is too big (121394), dropping buffer
main warning: output date isn't PTS date, requesting resampling (258436)
main warning: audio drift is too big (356587), dropping buffer
main warning: audio drift is too big (333367), dropping buffer
main warning: audio drift is too big (310147), dropping buffer
main warning: audio drift is too big (286686), dropping buffer
main warning: audio drift is too big (263467), dropping buffer
main warning: audio drift is too big (240247), dropping buffer
main warning: audio drift is too big (217027), dropping buffer
main warning: audio drift is too big (193807), dropping buffer
main warning: audio drift is too big (170587), dropping buffer
main warning: audio drift is too big (147367), dropping buffer
main warning: audio drift is too big (124147), dropping buffer
main warning: output date isn't PTS date, requesting resampling (281861)
main warning: audio drift is too big (382525), dropping buffer
main warning: audio drift is too big (359305), dropping buffer
main warning: audio drift is too big (336085), dropping buffer
main warning: audio drift is too big (312865), dropping buffer
main warning: audio drift is too big (289645), dropping buffer
main warning: audio drift is too big (266425), dropping buffer
main warning: audio drift is too big (243205), dropping buffer
main warning: audio drift is too big (219744), dropping buffer
main warning: audio drift is too big (196525), dropping buffer
main warning: audio drift is too big (173305), dropping buffer
main warning: audio drift is too big (150085), dropping buffer
main warning: audio drift is too big (126865), dropping buffer
main warning: output date isn't PTS date, requesting resampling (295061)
main warning: audio drift is too big (398684), dropping buffer
main warning: audio drift is too big (375464), dropping buffer
main warning: audio drift is too big (353003), dropping buffer
main warning: audio drift is too big (329784), dropping buffer
main warning: audio drift is too big (306564), dropping buffer
main warning: audio drift is too big (283344), dropping buffer
main warning: audio drift is too big (260124), dropping buffer
main warning: audio drift is too big (236904), dropping buffer
xcb_xv debug: display is visible
main warning: audio drift is too big (213684), dropping buffer
main warning: audio drift is too big (190464), dropping buffer
main warning: audio drift is too big (167003), dropping buffer
main warning: audio drift is too big (143784), dropping buffer
main warning: audio drift is too big (120564), dropping buffer
main warning: output date isn't PTS date, requesting resampling (329601)
main warning: audio drift is too big (426922), dropping buffer
main warning: audio drift is too big (403702), dropping buffer
main warning: audio drift is too big (380482), dropping buffer
main warning: audio drift is too big (357262), dropping buffer
main warning: audio drift is too big (333801), dropping buffer
main warning: audio drift is too big (310582), dropping buffer
main warning: audio drift is too big (287362), dropping buffer
main warning: audio drift is too big (264142), dropping buffer
main warning: audio drift is too big (240922), dropping buffer
main warning: audio drift is too big (217702), dropping buffer
main warning: audio drift is too big (194482), dropping buffer
main warning: audio drift is too big (171262), dropping buffer
main warning: audio drift is too big (147801), dropping buffer
main warning: audio drift is too big (124582), dropping buffer
main warning: output date isn't PTS date, requesting resampling (376133)
main warning: audio drift is too big (477450), dropping buffer
main warning: audio drift is too big (454230), dropping buffer
main warning: audio drift is too big (431010), dropping buffer
main warning: audio drift is too big (407790), dropping buffer
main warning: audio drift is too big (384329), dropping buffer
main warning: audio drift is too big (361110), dropping buffer
main warning: audio drift is too big (337890), dropping buffer
main warning: audio drift is too big (314670), dropping buffer
main warning: audio drift is too big (291450), dropping buffer
main warning: audio drift is too big (268230), dropping buffer
main warning: audio drift is too big (245010), dropping buffer
main warning: audio drift is too big (221790), dropping buffer
main warning: audio drift is too big (199329), dropping buffer
main warning: audio drift is too big (176110), dropping buffer
main warning: audio drift is too big (152890), dropping buffer
main warning: audio drift is too big (129670), dropping buffer
main warning: output date isn't PTS date, requesting resampling (387911)
main warning: audio drift is too big (494338), dropping buffer
main warning: audio drift is too big (471118), dropping buffer
main warning: audio drift is too big (447898), dropping buffer
main warning: audio drift is too big (424437), dropping buffer
main warning: audio drift is too big (401218), dropping buffer
main warning: audio drift is too big (377998), dropping buffer
main warning: audio drift is too big (354778), dropping buffer
main warning: audio drift is too big (331558), dropping buffer
main warning: audio drift is too big (308338), dropping buffer
main warning: audio drift is too big (285118), dropping buffer
main warning: audio drift is too big (261898), dropping buffer
main warning: audio drift is too big (238437), dropping buffer
main warning: audio drift is too big (215218), dropping buffer
main warning: audio drift is too big (191998), dropping buffer
main warning: audio drift is too big (168778), dropping buffer
main debug: auto hidding mouse
main warning: audio drift is too big (145558), dropping buffer
main warning: audio drift is too big (122338), dropping buffer
main warning: output date isn't PTS date, requesting resampling (414980)
main warning: audio drift is too big (514614), dropping buffer
main warning: audio drift is too big (491395), dropping buffer
main warning: audio drift is too big (468175), dropping buffer
main warning: audio drift is too big (444955), dropping buffer
main warning: audio drift is too big (421735), dropping buffer
main warning: audio drift is too big (398515), dropping buffer
main warning: audio drift is too big (375295), dropping buffer
main warning: audio drift is too big (352075), dropping buffer
main warning: audio drift is too big (328614), dropping buffer
xcb_xv debug: display is visible
xcb_xv debug: display is visible
main warning: audio drift is too big (305395), dropping buffer
main warning: audio drift is too big (282175), dropping buffer
main warning: audio drift is too big (258955), dropping buffer
main warning: audio drift is too big (235735), dropping buffer
main warning: audio drift is too big (212515), dropping buffer
main warning: audio drift is too big (189295), dropping buffer
main warning: audio drift is too big (166075), dropping buffer
main warning: audio drift is too big (142614), dropping buffer
main warning: output date isn't PTS date, requesting resampling (420766)
main warning: audio drift is too big (540138), dropping buffer
main warning: audio drift is too big (516918), dropping buffer
main warning: audio drift is too big (493698), dropping buffer
main warning: audio drift is too big (470478), dropping buffer
main warning: audio drift is too big (447258), dropping buffer
main warning: audio drift is too big (424038), dropping buffer
main warning: audio drift is too big (400577), dropping buffer
main warning: audio drift is too big (377358), dropping buffer
main warning: audio drift is too big (354138), dropping buffer
main warning: audio drift is too big (330918), dropping buffer
main warning: audio drift is too big (307698), dropping buffer
main warning: audio drift is too big (284478), dropping buffer
main warning: audio drift is too big (261258), dropping buffer
main warning: audio drift is too big (238038), dropping buffer
main warning: audio drift is too big (215577), dropping buffer
main warning: audio drift is too big (192358), dropping buffer
main warning: audio drift is too big (169138), dropping buffer
main warning: audio drift is too big (145918), dropping buffer
main warning: audio drift is too big (122698), dropping buffer
main warning: output date isn't PTS date, requesting resampling (465073)
main warning: audio drift is too big (564529), dropping buffer
main warning: audio drift is too big (541309), dropping buffer