Author Topic: 1080p video playback, frame rate fps>24 adn refframes  (Read 2517 times)

July 04, 2009, 10:15:13 AM
Read 2517 times

riverplate86

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Hi. I have a few quiestions about video playback on WDTV.
First of all, I'm in Argentina and hope you to understand my poor English.

1) If I look the specs of WDTV on WD website, it says that it can play 1080p videos of up to 24 fps, right?
I have a few 1080p videos in m2ts files with 29.970 fps. Will I be able to watch thoose files on WDTV?
As an example I copy the mediainfo output of one of my m2ts videos:


General
ID : 1
Complete name : C:\Documents and Settings\Julian\Escritorio\1080p\hd_other_samsung_karim_rashid.m2ts
Format : BDAV
Format/Info : BluRay Video
File size : 355 MiB
Duration : 5mn 36s
Overall bit rate : 8 864 Kbps
Maximum Overall bit rate : 35.5 Mbps

Video
ID : 4113 (0x1011)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Duration : 5mn 36s
Bit rate : 8 248 Kbps
Nominal bit rate : 8 158 Kbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16/9
Frame rate : 29.970 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.133
Stream size : 330 MiB (93%)
Writing library : x264 core 61
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=6 / psy_rd=1.000000 / brdo=1 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=0 / threads=3 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / bime=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=2pass / bitrate=8158 / ratetol=1.0 / rceq='blurCplx^(1-qComp)' / qcomp=1.00 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=24000 / vbv_bufsize=9000 / ip_ratio=1.40 / pb_ratio=1.30 / aq=2:1.00

Audio
ID : 4352 (0x1100)
Menu ID : 1 (0x1)
Format : AC-3
Format/Info : Audio Coding 3
Duration : 5mn 36s
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 48.0 KHz
Stream size : 10.3 MiB (3%)

2) I have read that WDTV has some pixalation problems with 1080p videos encoded with h264/x264 codec. I have many mkv fims encoded that way and I would like to know if I'll be able to play them flawlessly on WDTV. Has this issue (pixalation) been fixed? Has itsomthing to do with high bitrates or reffremes?

As an example I copy the mediainfo output of one MKK /H264 1080p film I would like to wath (5 reframes):

General
Complete name : E:\BitTorrent\Australia.2008.MULTi.1080p.BluRay.x264.DTS-FHD\fhd-australia.dts.1080p.mkv
Format : Matroska
File size : 13.1 GiB
Duration : 2h 45mn
Overall bit rate : 11.4 Mbps
Encoded date : UTC 2009-06-25 09:52:19
Writing application : mkvmerge v2.9.0 ('Moanin'') built on May 22 2009 17:46:31
Writing library : libebml v0.7.7 + libmatroska v0.8.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Muxing mode : Container profile=Unknown@4.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 2h 45mn
Bit rate : 8 863 Kbps
Nominal bit rate : 9 073 Kbps
Width : 1 920 pixels
Height : 816 pixels
Display aspect ratio : 2.35
Frame rate : 23.976 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.236
Stream size : 10.2 GiB (78%)
Title : Video
Writing library : x264 core 67 r1171M 2c7cb4c
Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x2 / me=umh / subme=7 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40 / rc=2pass / bitrate=9073 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Language : French

Audio #1
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 2h 45mn
Bit rate mode : Constant
Bit rate : 755 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Surround: L R, LFE
Sampling rate : 48.0 KHz
Resolution : 24 bits
Stream size : 893 MiB (7%)
Title : French DTS
Language : French

Audio #2
ID : 3
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 2h 45mn
Bit rate mode : Constant
Bit rate : 1 510 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Surround: L R, LFE
Sampling rate : 48.0 KHz
Resolution : 24 bits
Stream size : 1.74 GiB (13%)
Title : English DTS
Language : English

Text #1
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : French Forced
Language : French


3) Are still there DTS dropout issues or they have already fixed them?

4) (last) Are there audio/video sync issues with some files?

Hope you understand and help me! Sorry for this long post!
Thanks in advance.
riverplate86

July 06, 2009, 05:36:39 AM
Reply #1

riverplate86

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July 06, 2009, 10:53:55 AM
Reply #2

jayallan

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Welcome from Argentina!

The two sample files you posted specs on should both play no problem.  They are within the reference Frame limit and carry compatible audio tracks.  The reference frame limit is a function on the chip's power and will not be changed.  Any files you get that do have too many ref frames you can re-encode as well.  Best to encode everything yourself then you will have no issues.

There are no DTS dropout issues with properly encoded DTS tracks.   But you will need a DTS decoder to listen to them.

And finally, I have over 400 MKV files and dozens of AVI files, none of which has any sync issues. 

I hope this helps!
WDTV LIVE with current official FW > HDMI > DVDO > Sony CRT Projector 150" 16/9 screen.  Toslink audio to Yamaha DTS receiver. No Network set up yet.

July 06, 2009, 06:04:58 PM
Reply #3

riverplate86

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Welcome from Argentina!

The two sample files you posted specs on should both play no problem.  They are within the reference Frame limit and carry compatible audio tracks.  The reference frame limit is a function on the chip's power and will not be changed.  Any files you get that do have too many ref frames you can re-encode as well.  Best to encode everything yourself then you will have no issues.

There are no DTS dropout issues with properly encoded DTS tracks.   But you will need a DTS decoder to listen to them.

And finally, I have over 400 MKV files and dozens of AVI files, none of which has any sync issues. 

I hope this helps!


Thank you very very much jayallan!! Your answers were great! Im decided to buy WDTV!
BTW: I have external subtitles for some files and I have read that it causes more effort to the WDTV specially in1080p files playback. If I mux them into the mkv file will it be better?
Best regards.
riverplate86

July 06, 2009, 07:07:19 PM
Reply #4

jayallan

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I don't have any experience with subtitles, but we have a subtitle section on this site.  Post any specific questions there!

Enjoy your new toy!

WDTV LIVE with current official FW > HDMI > DVDO > Sony CRT Projector 150" 16/9 screen.  Toslink audio to Yamaha DTS receiver. No Network set up yet.

July 07, 2009, 08:09:05 AM
Reply #5

riverplate86

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July 09, 2009, 09:58:17 AM
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activoice

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The site below lists the number of reference frames that will playback at each given resolution (this is the only reference that I'm aware of)

http://wdtv.wetpaint.com/page/Conversion+&+Spec+Guide