Video stops playin on WDTV Live after a few minutes playback

Merry Christmas everybody!

Would you please help, I've been having this problem with a number of video files lately (though not all); I'll report it here for a specific file.

I'm running Serviio 1.5.2 on Linux Mint 17.2, with a wired connection to a WDTV Live box for the living room TV. The problem is that a file will start playing normally but after a few minutes' playback (I'd guess 3-10 minutes, not the same for every video file) playback stops and WDTV Live returns to the folder view (same screen you click on the video to play it). I also notice that under the preview windows where some file data is mentioned, the file size is misrepresented. File size for this 3.1 GB (as reported by Nemo file manager) video is shown as 100MB in WDTV Live.

My system is current on OS updates, WDTV Live runs the latest official firmware (that has been pushed to the device). Transcoding is off in the Serviio console.

Any other info needed I'll be glad to provide.

The file data from Mediainfo is as follows, if it helps:

General
Complete name : /home/nkostaki/music-movies/xxxxxxxx LIMITED 720p BRRip XviD AC3-RARBG.avi
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 2.93 GiB
Duration : 1h 33mn
Overall bit rate : 4 464 Kbps
Writing library : VirtualDub build 32842/release

Video
ID : 0
Format : MPEG-4 Visual
Format profile : Advanced Simple@L5
Format settings, BVOP : 2
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Muxing mode : Packed bitstream
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 1h 33mn
Bit rate : 3 814 Kbps
Width : 1 280 pixels
Height : 688 pixels
Display aspect ratio : 1.85:1
Frame rate : 23.976 (24000/1001) fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.181
Stream size : 2.50 GiB (85%)
Writing library : XviD 64

Audio
ID : 1
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 2000
Duration : 1h 33mn
Bit rate mode : Constant
Bit rate : 640 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Frame rate : 31.250 fps (1536 spf)
Compression mode : Lossy
Stream size : 430 MiB (14%)
Alignment : Aligned on interleaves
Interleave, duration : 42 ms (1.00 video frame)
Interleave, preload duration : 512 ms

Also, ffmpeg -i

ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
libavutil 55. 11.100 / 55. 11.100
libavcodec 57. 20.100 / 57. 20.100
libavformat 57. 20.100 / 57. 20.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 21.101 / 6. 21.101
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[avi @ 0x3b7a2e0] non-interleaved AVI
Input #0, avi, from 'song.avi':
Duration: 01:33:59.59, start: 0.000000, bitrate: 4464 kb/s
Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 1280x688 [SAR 1:1 DAR 80:43], 3813 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side), fltp, 640 kb/s
At least one output file must be specified