Playback buffering issues on certain videos

My issues is that on different films it plays some of it 3-5 minutes of the film before buffering and then loosing connection. This only happens on a couple of films. I can play the films fine directly from my PC but if I stream via any interface it freezes at the same point.

I am running Plex with the following Spec:
X5670 12 cores allocated
1GB Memory
1 Gbit/s connection
1TB spinning rust

Ive had a look through the logs and this is all I can see is happening.

ar 26, 2017 21:36:40.473 [0x7f9e8fbff700] DEBUG - Play progress on 1159 'The Walk' - got played 206987 ms by account 1! Mar 26, 2017 21:36:40.473 [0x7f9e8fbff700] DEBUG - [Now] User is Blacksmith95 (ID: 1) Mar 26, 2017 21:36:40.473 [0x7f9e8fbff700] DEBUG - [Now] Device is Chrome (Plex Web (Chrome)). Mar 26, 2017 21:36:40.473 [0x7f9e8fbff700] DEBUG - [Now] Profile is Web Mar 26, 2017 21:36:40.473 [0x7f9e8fbff700] DEBUG - [Now] Updated play state for /library/metadata/1159. Mar 26, 2017 21:36:40.474 [0x7f9e8fbff700] DEBUG - Statistics: () Reporting active playback in state 2 of type 1 (scrobble: 0) for account 1 Mar 26, 2017 21:36:40.474 [0x7f9e8fbff700] DEBUG - It took 0.0 sec to serialize a list with 0 elements. Mar 26, 2017 21:36:40.476 [0x7f9e913fe700] DEBUG - Completed: [x.x.x.x:55011] 200 GET /:/timeline?hasMDE=1&ratingKey=1159&key=%2Flibrary%2Fmetadata%2F1159&state=buffering&playQueueItemID=129&time=206987&duration=7391382 (5 live) TLS GZIP 6ms 470 bytes (pipelined: 47) Mar 26, 2017 21:36:41.886 [0x7f9e8abfe700] DEBUG - Streaming Resource: Updating client bandwidth to 10227kbps with most recent 12631kbps (3932160) Mar 26, 2017 21:36:50.488 [0x7f9e91bff700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication. Mar 26, 2017 21:36:50.488 [0x7f9e91bff700] DEBUG - Auth: authenticated user 1 as Blacksmith95 Mar 26, 2017 21:36:50.488 [0x7f9e91bff700] DEBUG - Auth: Came in with a super-token, authorization succeeded. Mar 26, 2017 21:36:50.489 [0x7f9e8fbff700] DEBUG - Request: [x.x.x.x:55011 (WAN)] GET /:/timeline?hasMDE=1&ratingKey=1159&key=%2Flibrary%2Fmetadata%2F1159&state=buffering&playQueueItemID=129&time=206987&duration=7391382 (5 live) TLS GZIP Signed-in Token (Blacksmith95) Mar 26, 2017 21:36:50.490 [0x7f9e8fbff700] DEBUG - Client [kcbwpd7efhygm2qmhrggb9yk] reporting timeline state buffering, progress of 206987/7391382ms for guid=, ratingKey=1159 url=, key=/library/metadata/1159, containerKey=, metadataId=1159 Mar 26, 2017 21:36:50.492 [0x7f9e8fbff700] DEBUG - Play progress on 1159 'The Walk' - got played 206987 ms by account 1! Mar 26, 2017 21:36:50.492 [0x7f9e8fbff700] DEBUG - [Now] User is Blacksmith95 (ID: 1) Mar 26, 2017 21:36:50.492 [0x7f9e8fbff700] DEBUG - [Now] Device is Chrome (Plex Web (Chrome)). Mar 26, 2017 21:36:50.493 [0x7f9e8fbff700] DEBUG - [Now] Profile is Web Mar 26, 2017 21:36:50.493 [0x7f9e8fbff700] DEBUG - [Now] Updated play state for /library/metadata/1159. Mar 26, 2017 21:36:50.494 [0x7f9e8fbff700] DEBUG - Statistics: (u9bwh81clc8hb4y8ty2cmzpv) Reporting active playback in state 2 of type 1 (scrobble: 0) for account 1 Mar 26, 2017 21:36:50.494 [0x7f9e8fbff700] DEBUG - It took 0.0 sec to serialize a list with 0 elements. Mar 26, 2017 21:36:50.495 [0x7f9e91bff700] DEBUG - Completed: [x.x.x.x:55011] 200 GET /:/timeline?hasMDE=1&ratingKey=1159&key=%2Flibrary%2Fmetadata%2F1159&state=buffering&playQueueItemID=129&time=206987&duration=7391382 (5 live) TLS GZIP 6ms 470 bytes (pipelined: 48) Mar 26, 2017 21:36:51.897 [0x7f9e83fff700] DEBUG - Streaming Resource: Updating client bandwidth to 10380kbps with most recent 10152kbps (3162112) Mar 26, 2017 21:36:58.939 [0x7f9e91bff700] DEBUG - Failed to stream media, client probably disconnected: 32 - Broken pipe Mar 26, 2017 21:36:58.939 [0x7f9e91bff700] DEBUG - Completed: [x.x.x.x:55044] 200 GET /library/parts/2849/1485298798/file.mp4 (5 live) TLS 274682ms 339050496 bytes (pipelined: 1) Mar 26, 2017 21:36:58.940 [0x7f9e92bff700] DEBUG - Streaming Resource: Updating client bandwidth to 9928kbps with most recent 9875kbps (339017728) Mar 26, 2017 21:36:59.290 [0x7f9e913fe700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication. Mar 26, 2017 21:36:59.290 [0x7f9e913fe700] DEBUG - Auth: authenticated user 1 as Blacksmith95 Mar 26, 2017 21:36:59.290 [0x7f9e913fe700] DEBUG - Auth: Came in with a super-token, authorization succeeded. Mar 26, 2017 21:36:59.290 [0x7f9e82fff700] DEBUG - Request: [x.x.x.x:55124 (WAN)] GET /library/parts/2849/1485298798/file.mp4 (5 live) TLS Signed-in Token (Blacksmith95) Mar 26, 2017 21:36:59.290 [0x7f9e82fff700] DEBUG - Request range: 378896384 to 0 Mar 26, 2017 21:36:59.296 [0x7f9e82fff700] DEBUG - Content-Length of /home/plex/movies/The Walk (2015) [1080p]/The.Walk.2015.1080p.BluRay.x264.[YTS.AG].mp4 is 1988957091. Mar 26, 2017 21:36:59.296 [0x7f9e8abfe700] DEBUG - Streaming Resource: Updating client bandwidth to 9931kbps with most recent 10700kbps (2342912) Mar 26, 2017 21:36:59.408 [0x7f9e913fe700] DEBUG - WebSocket: client initiated close Mar 26, 2017 21:36:59.408 [0x7f9e913fe700] DEBUG - WebSocket: processed 0 frame(s) Mar 26, 2017 21:36:59.409 [0x7f9e91bff700] DEBUG - NotificationStream: Removing because of close Mar 26, 2017 21:36:59.409 [0x7f9e913fe700] DEBUG - handleStreamRead code 335544539: short read Mar 26, 2017 21:36:59.410 [0x7f9e913fe700] DEBUG - Failed to stream media, client probably disconnected: 32 - Broken pipe

Could anyone help me with this issue?

upload the information of the files themselves that you are experiencing issues with.