So I cleared all the logs and ran a test using two video files and it produced these logs. (Note, I have XXXXXXXX out my directories for privacy.
May 25, 2015 15:03:21 [0x48028c90] DEBUG - Opening 20 database sessions to library, SQLite 3.8.9, threadsafe=1
May 25, 2015 15:03:22 [0x48028c90] DEBUG - Analyzing media parts for item 1575 (Edge of Tomorrow)
May 25, 2015 15:03:22 [0x48028c90] DEBUG - Updating metadata item (save) (Edge of Tomorrow) with ID 1575
May 25, 2015 15:03:22 [0x48028c90] DEBUG - [ID 1516] Media part analysis: /volume1/XXXXXXX/Edge.of.Tomorrow.2014.1080p.mkv
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Opening input file: /volume1/XXXXXXXXX/Edge.of.Tomorrow.2014.1080p.mkv
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - Format matroska,webm probed with size=2048 and score=100
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - st:0 removing common factor 1000000 from timebase
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - st:1 removing common factor 1000000 from timebase
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - Before avformat_find_stream_info() pos: 6347 bytes read:32768 seeks:0
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - no picture
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - Stream with high frequencies VQ coding
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - All info found
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - After avformat_find_stream_info() pos: 39811 bytes read:65536 seeks:0 frames:20
May 25, 2015 15:03:23 [0x48028c90] INFO - Sample aspect ratio is 0:1
May 25, 2015 15:03:23 [0x48028c90] DEBUG - * bc748491fd9fe7b4aa5edf33c2ef94897b10d82a [mkv h264/dca] Duration: 6809000ms, 1920x800 (2.400000) 23.976fps, bitrate=10016kbps, audio channels=6, optimizedForStreaming=0 (/volume1/XXXXXXXXXX/Edge.of.Tomorrow.2014.1080p.mkv)
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Enriching 1 video stream(s) with MediaInfo
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Enriching 1 audio stream(s) with MediaInfo
May 25, 2015 15:03:23 [0x48028c90] INFO - Matched video stream: FFmpeg index 0 (id 0x00) -> MediaInfo stream index 0 (id 1)
May 25, 2015 15:03:23 [0x48028c90] INFO - * MediaInfo: format=AVC, bitrate=8508000
May 25, 2015 15:03:23 [0x48028c90] INFO - * FFmpeg: codec=h264, bitrate=0
May 25, 2015 15:03:23 [0x48028c90] INFO - Matched audio stream: FFmpeg index 1 (id 0x00) -> MediaInfo stream index 0 (id 2)
May 25, 2015 15:03:23 [0x48028c90] INFO - * MediaInfo: format=DTS, language=eng, bitrate=1509000, channels=6
May 25, 2015 15:03:23 [0x48028c90] INFO - * FFmpeg: codec=dca, language=eng, bitrate=1536000, channels=6
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Importing 13 media chapters.
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Chapters had generic titles, clearing.
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Updating metadata item (save) (Edge of Tomorrow) with ID 1575
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Doing expensive tags write for 'Edge of Tomorrow' because something changed.
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Closing input file: /volume1/XXXXXXXXX/Edge.of.Tomorrow.2014.1080p.mkv
May 25, 2015 15:03:23 [0x48028c90] DEBUG - [FFMPEG] - Statistics: 65536 bytes read, 0 seeks
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Committing media stream changes for part 1516
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Updating media item 1516, size=8525836430, metadata_item_id=1575
May 25, 2015 15:03:23 [0x48028c90] DEBUG - Updating part with ID=1516 [/volume1/XXXXXXXXXXX/Edge.of.Tomorrow.2014.1080p.mkv]
May 25, 2015 15:01:40 [0x48028c90] DEBUG - Opening 20 database sessions to library, SQLite 3.8.9, threadsafe=1
May 25, 2015 15:01:43 [0x48028c90] DEBUG - Analyzing media parts for item 1551 (A Million Ways to Die in the West)
May 25, 2015 15:01:43 [0x48028c90] DEBUG - Updating metadata item (save) (A Million Ways to Die in the West) with ID 1551
May 25, 2015 15:01:44 [0x48028c90] DEBUG - [ID 1492] Media part analysis: /volume1/XXXXXXXX/A.Million.Ways.to.Die.in.the.West.2014.1080p.mkv
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Opening input file: /volume1/XXXXXXXXXXXX/A.Million.Ways.to.Die.in.the.West.2014.1080p.mkv
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - Format matroska,webm probed with size=2048 and score=100
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - st:0 removing common factor 1000000 from timebase
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - st:1 removing common factor 1000000 from timebase
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - Before avformat_find_stream_info() pos: 4649 bytes read:32800 seeks:2
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - no picture
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - All info found
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - After avformat_find_stream_info() pos: 22198 bytes read:65568 seeks:2 frames:9
May 25, 2015 15:01:49 [0x48028c90] INFO - Sample aspect ratio is 0:1
May 25, 2015 15:01:49 [0x48028c90] DEBUG - * 7e086ee43a6874de7b19f4581d16df789a399a3c [mkv h264/ac3] Duration: 6955000ms, 1916x784 (2.443877) 23.976fps, bitrate=4842kbps, audio channels=6, optimizedForStreaming=0 (/volume1/XXXXXX/A.Million.Ways.to.Die.in.the.West.2014.1080p.mkv)
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Enriching 1 video stream(s) with MediaInfo
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Enriching 1 audio stream(s) with MediaInfo
May 25, 2015 15:01:49 [0x48028c90] INFO - Matched video stream: FFmpeg index 0 (id 0x00) -> MediaInfo stream index 0 (id 1)
May 25, 2015 15:01:49 [0x48028c90] INFO - * MediaInfo: format=AVC, bitrate=4442000
May 25, 2015 15:01:49 [0x48028c90] INFO - * FFmpeg: codec=h264, bitrate=0
May 25, 2015 15:01:49 [0x48028c90] INFO - Matched audio stream: FFmpeg index 1 (id 0x00) -> MediaInfo stream index 0 (id 2)
May 25, 2015 15:01:49 [0x48028c90] INFO - * MediaInfo: format=AC-3, language=, bitrate=384000, channels=6
May 25, 2015 15:01:49 [0x48028c90] INFO - * FFmpeg: codec=ac3, language=, bitrate=384000, channels=6
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Chapters had generic titles, clearing.
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Updating metadata item (save) (A Million Ways to Die in the West) with ID 1551
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Closing input file: /volume1/XXXXXXXX/A.Million.Ways.to.Die.in.the.West.2014.1080p.mkv
May 25, 2015 15:01:49 [0x48028c90] DEBUG - [FFMPEG] - Statistics: 65568 bytes read, 2 seeks
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Committing media stream changes for part 1492
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Updating media item 1492, size=4210252472, metadata_item_id=1551
May 25, 2015 15:01:49 [0x48028c90] DEBUG - Updating part with ID=1492 [/volume1/XXXXXXXX/A.Million.Ways.to.Die.in.the.West.2014.1080p.mkv]