I use my Vero 4k+ for all media playing. I still have Servioo on my Samsung TV from before I bought the vero. I have a group of files that the Vero does not like (video lags way behind the audio).
To my suprise Servioo plays it perfectly. Its not a problem as I can use Servioo fine, but below is media info if it helps find the issue.
General
Complete name : D:\bit_down\Soviet Storm - WW2 in the East\3. Soviet Storm World War II In The East. ep.3. The Defence of Sevastopol.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 796 MiB
Duration : 43mn 58s
Overall bit rate mode : Variable
Overall bit rate : 2 533 Kbps
Encoded date : UTC 2014-04-18 00:20:42
Tagged date : UTC 2014-04-18 00:20:42
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 43mn 58s
Bit rate : 2 337 Kbps
Maximum bit rate : 6 302 Kbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 25.000 fps
Minimum frame rate : 25.000 fps
Maximum frame rate : 1 000.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.045
Stream size : 735 MiB (92%)
Encoded date : UTC 2014-03-07 23:57:53
Tagged date : UTC 2014-04-18 00:22:16
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 43mn 58s
Bit rate mode : Variable
Bit rate : 192 Kbps
Maximum bit rate : 202 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
Stream size : 60.4 MiB (8%)
Language : English
Encoded date : UTC 2014-03-08 00:13:05
Tagged date : UTC 2014-04-18 00:22:16