Entonces, ¿cómo puedo solucionar esto?, ¿se puede modificar el buffer de alguna manera?, ¿no debería actuar de la misma manera que lo haría desde disco?
En el log no veo que salga ningún problema de buffer:
00:31:17.616: vp [DEBUG]:Playing 'smb://xxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv', primary, resume:yes (overridden)
00:31:17.618: media [DEBUG]:Settings initialized for URL
smb://xxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv in folder: Películas [<unset>]
00:31:17.631: SVSYNC [DEBUG]:Set to 0s
00:31:17.640: AVSYNC [DEBUG]:Set to 0 ms
00:31:17.749: probe [DEBUG]:smb://xxxxxxxxx/Películas/Matrix [1080p-DTS].mkv: Probed as matroska,webm
00:31:17.948: Video [DEBUG]:Starting playback of
smb://xxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv (matroska,webm)
00:31:17.949: Probe [DEBUG]: Stream #0: Video: h264 (High), yuv420p, 1920x800
00:31:17.950: Probe [DEBUG]: Stream #1: Audio: dca (DTS), 48000 Hz, 5.1, fltp, 768 kb/s
00:31:17.950: Probe [DEBUG]: Stream #2: Subtitle: [0][0][0][0] / 0x0000
00:31:17.950: Probe [DEBUG]: Stream #3: Attachment: [0][0][0][0] / 0x0000
00:31:17.951: Probe [DEBUG]: Stream #4: Attachment: [0][0][0][0] / 0x0000
00:31:17.951: Probe [DEBUG]: Stream #5: Attachment: [0][0][0][0] / 0x0000
00:31:17.951: Probe [DEBUG]: Stream #6: Attachment: [0][0][0][0] / 0x0000
00:31:17.952: Probe [DEBUG]: Stream #7: Attachment: [0][0][0][0] / 0x0000
00:31:17.952: Probe [DEBUG]: Stream #8: Attachment: [0][0][0][0] / 0x0000
00:31:17.953: Probe [DEBUG]: Stream #9: Attachment: [0][0][0][0] / 0x0000
00:31:17.953: Probe [DEBUG]: Stream #10: Attachment: [0][0][0][0] / 0x0000
00:31:17.954: media [DEBUG]:Selecting track libav:1, best score 312
00:31:17.955: Media [DEBUG]:Selecting audio track libav:1
00:31:17.955: media [DEBUG]:Selecting track libav:2, best score 5305
00:31:17.956: Subscanner [DEBUG]:Starting subtitle scan for Matrix [1080p-DTS] (imdbid:<unknown>;) year:0 season:-1 episode:-1 duration:8177 opensubhash:f94f1b366ba575f4
00:31:17.956: Media [INFO ]:Selecting subtitle track libav:2
00:31:17.957: Video [DEBUG]:Scanning for subs in
smb://xxxxxxxxxxxx/Películas/ for Matrix [1080p-DTS]
00:31:17.957: Video [DEBUG]: Stream #0: Video: h264 (High), yuv420p, 1920x800
00:31:17.958: extradata [DEBUG]:0x000000: 01 64 00 29 ff e1 00 18 67 64 00 29 ac 34 e5 01 .d.)....gd.).4..
00:31:17.958: extradata [DEBUG]:0x000010: e0 19 68 40 00 65 d3 c0 13 12 d0 23 c6 0c 65 80 ..h@.e.....#..e.
00:31:17.959: extradata [DEBUG]:0x000020: 01 00 05 68 ee 8f 2c 8b ...h..,.
00:31:17.959: VDEC [DEBUG]:Dumping SPS
00:31:17.959: VDEC [DEBUG]:SPS0: 1920 x 800 profile:100 level:4.1 ref-frames:4
00:31:17.959: VDEC [DEBUG]: crop: left:0 right:0 top:0 bottom:0
00:31:17.991: VDEC [DEBUG]:Opening codec h264 level 42 using 54157309 bytes of RAM
00:31:17.995: VDEC [DEBUG]:Cell accelerated codec created using 54157309 bytes of RAM
00:31:17.996: Video [DEBUG]: Stream #0: Codec created
00:31:17.996: Video [DEBUG]: Stream #1: Audio: dca (DTS), 48000 Hz, 5.1, fltp, 768 kb/s
00:31:17.998: Video [DEBUG]: Stream #1: Codec created
00:31:17.999: Video [DEBUG]: Stream #2: Subtitle: [0][0][0][0] / 0x0000
00:31:18.000: Video [DEBUG]: Stream #3: Attachment: [0][0][0][0] / 0x0000
00:31:18.000: Video [DEBUG]: filename: LFAX.TTF mimetype: application/x-truetype-font size: 61912
00:31:18.037: Freetype [DEBUG]:Loaded font family='lucida fax' fullname='lucida fax regular' style='Regular' from
smb://xxxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.038: Video [DEBUG]: Stream #4: Attachment: [0][0][0][0] / 0x0000
00:31:18.038: Video [DEBUG]: filename: LFAXD.TTF mimetype: application/x-truetype-font size: 62100
00:31:18.067: Freetype [DEBUG]:Loaded font family='lucida fax' fullname='lucida fax demibold' style='Demibold' from
smb://xxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.067: Video [DEBUG]: Stream #5: Attachment: [0][0][0][0] / 0x0000
00:31:18.068: Video [DEBUG]: filename: LFAXDI.TTF mimetype: application/x-truetype-font size: 71472
00:31:18.098: Freetype [DEBUG]:Loaded font family='lucida fax' fullname='lucida fax demibold italic' style='Demibold Italic' from
smb://xxxxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.098: Video [DEBUG]: Stream #6: Attachment: [0][0][0][0] / 0x0000
00:31:18.098: Video [DEBUG]: filename: LFAXI.TTF mimetype: application/x-truetype-font size: 67420
00:31:18.128: Freetype [DEBUG]:Loaded font family='lucida fax' fullname='lucida fax italic' style='Italic' from
smb://xxxxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.128: Video [DEBUG]: Stream #7: Attachment: [0][0][0][0] / 0x0000
00:31:18.129: Video [DEBUG]: filename: TIMES.TTF mimetype: application/x-truetype-font size: 409280
00:31:18.171: Freetype [DEBUG]:Loaded font family='times new roman' fullname='times new roman regular' style='Regular' from
smb://xxxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.172: Video [DEBUG]: Stream #8: Attachment: [0][0][0][0] / 0x0000
00:31:18.172: Video [DEBUG]: filename: TIMESBD.TTF mimetype: application/x-truetype-font size: 398372
00:31:18.216: Freetype [DEBUG]:Loaded font family='times new roman' fullname='times new roman bold' style='Bold' from
smb://xxxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.216: Video [DEBUG]: Stream #9: Attachment: [0][0][0][0] / 0x0000
00:31:18.216: Video [DEBUG]: filename: TIMESBI.TTF mimetype: application/x-truetype-font size: 239692
00:31:18.255: Freetype [DEBUG]:Loaded font family='times new roman' fullname='times new roman bold italic' style='Bold Italic' from
smb://xxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.255: Video [DEBUG]: Stream #10: Attachment: [0][0][0][0] / 0x0000
00:31:18.256: Video [DEBUG]: filename: TIMESI.TTF mimetype: application/x-truetype-font size: 248368
00:31:18.293: Freetype [DEBUG]:Loaded font family='times new roman' fullname='times new roman italic' style='Italic' from smbxxxxxxxxxxxxxxx/Películas/Matrix [1080p-DTS].mkv domain:17
00:31:18.316: audio [DEBUG]:Codec changed to dca (0x15004)
00:31:18.317: AUDIO [DEBUG]:The state is 0
00:31:18.319: AUDIO [DEBUG]:PS3 audio port 0 opened (8 channels)
00:31:18.319: Audio [DEBUG]:Converting from [5.1 48000Hz fltp] to [7.1 48000Hz flt]
00:32:26.725: Video [DEBUG]:Playback reached EOF: End of file (-1606004923)
00:32:44.312: Video [DEBUG]:Playback reached 1%, counting as played (
smb://xxxxxxxx/disco 2/Películas/Matrix [1080p-DTS].mkv)
00:32:44.313: Video [DEBUG]:Stopped playback of
smb://xxxxxxxxx/disco 2/Películas/Matrix [1080p-DTS].mkv
00:32:44.313: VDEC [DEBUG]:Waiting for end sequence
00:32:44.318: VDEC [DEBUG]:Waiting for end sequence -> done
00:32:44.323: VDEC [DEBUG]:Freeing picture list
00:32:44.323: VDEC [DEBUG]:Free picture 0x41cfc988
00:32:44.323: VDEC [DEBUG]:Free RSX mem 41cfc9a0 +2304000
00:32:44.324: VDEC [DEBUG]:Free picture 0x41c79388
00:32:44.324: VDEC [DEBUG]:Free RSX mem 41c793a0 +2304000
00:32:44.326: VDEC [DEBUG]:Cell decoder closed
Saludos.