I have a KDL-32W705C TV, and am using the media player to play video files from both an DLNA server and a USB thumb drive. Some files play perfectly, but others cut out at around the 25 minute mark: playback stops, the screen goes black and eventually the player returns to the start of the file when I press play again. This also occurs when fast forwarding through the video: at around the 25 minute mark the fast forward stops and returns to 0:00:00.
These videos are in an MP4 container. The output of mediainfo is given below for one of the files:
```
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.2
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 h 52 min
Bit rate : 5 061 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 50.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.110
Stream size : 3.99 GiB (97%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 h 52 min
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 103 MiB (2%)
Language : English
Default : Yes
Alternate group : 1
```
Not all MP4 files with H264/AAC have this problem. I can transcode to VP8 and the files play OK, but am reluctant to do this as it increases the file size for the videos, and the DLNA server has slow enough throughput that there is occasionally buffering from VP8 encoded files with comparable quality to the original.
Is there any way to find out what is causing these errors? Perhaps a log file is stored somewhere? Given the age of the TV I'm not expecting Sony to release a fix, but I would like to find out what the problem is as it would help in finding a better workaround.
