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Full Version: Video playback quality issue with .m2ts files
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I have bought a new QNAP TS-469L NAS featuring XBMC to Play my thousands of privately recorded Camcorder videos (every video section is stored as a file ending with .m2ts)

However, the Quality of the Video is really bad. Symptoms are:
- auido stutters
- Video stutters or has artifacts when pans are shown

I first thought it could be a Hardware issue so I upgraded the RAM Memory of the NAS to 3GB, which is the Maximum. Without improvement.

I have also tried via the twonkey media Server Feature and streamed the files via my PS3 - but the Quality is even worse.

What can I do to enjoy my home Videos in full HD Quality?

Show us the output of mediainfo on one of the files, and an xbmc debug log (wiki) of playing one.
How do I get to see the mediainfo Output (files)? I have xmbc installed on my NAS and therefore can't really look into it. All I see on my NAS directory are folders, such as "multimedia", "download", etc. containing my Video files and Pictures. Sorry, am not familiar with the Software yet...
Ahh ok . What sort of nas and is such a machine really tuned for hd playback?

Mediainfo is a commandline program. Can you ssh into the nas?
It is a QNAP TS-469L with Intel® Atom™ 2.13 GHz Dual-core Processor and upgraded 3GB RAM. According to QNAP one of the latest HD capable NAS, see: http://www.qnap.com/en/index.php?lang=en...=13444&g=1

Don't know how to ssh into the nas. Is there an instruction for this anywhere?
What graphics hardware does it have?
Copy a small video clip from the camcorder to your PC in order to run MediaInfo (wiki).
Here's the logfile: http://forum.xbmc.org/showthread.php?tid...on=newpost

For Hardware specs see the link posted above. However, no graphics Hardware is mentioned...

And finally here the mediainfo of one of the home Video sequences (hope this is what you need):
ID : 0 (0x0)
Complete name : C:\Users\migron\Videos\2013\30130331 Schlitteln Angie & Mäsi\00000.m2ts
Format : BDAV
Format/Info : Blu-ray Video
File size : 64.3 MiB
Duration : 20s 605ms
Overall bit rate mode : Variable
Overall bit rate : 26.2 Mbps
Maximum Overall bit rate : 28.0 Mbps

ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Format settings, GOP : M=1, N=12
Codec ID : 27
Duration : 20s 160ms
Bit rate mode : Variable
Bit rate : 24.9 Mbps
Maximum bit rate : 26.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.240
Stream size : 59.8 MiB (93%)

ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 129
Duration : 20s 160ms
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 630 KiB (1%)

ID : 4608 (0x1200)
Menu ID : 1 (0x1)
Format : PGS
Codec ID : 144
Duration : 19s 615ms
try a deinterlacer. the video is interlaced and your display is progressive (if you dont know the terms i give them so you can use your fav search engine to educate yourself). i know the media info claims it is progressive but dont trust it..
Thanks for sharing, I think I found the answer I needed.
(2013-06-04, 05:03)kittyshen2013 Wrote: [ -> ]Thanks for sharing, I think I found the answer I needed.
Please share what the answer was for the elucidation of future readers.
Arrrgghhhh fooled again, sorry for the noise.
above entry seems to be a spambot.

In fact I have not solved the issue to date but am awaiting an answer from QNAP Support. They have acknowledged the issue more than a month ago but are not responding anymore.

Looks like the Hardware cannot cope with 18Mbps comprimation of my Camcorder....