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Why is this file transcoded ?

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NX3

DLNA master

Posts: 578

Joined: Fri Jan 28, 2011 12:39 pm

Post Tue Jul 30, 2013 5:42 pm

Why is this file transcoded ?

Sony 2011 profile, this gets transcoded to mpeg2 but it appears at face value the same as all other HD videos that don't get fully transcoded.

  Code:
Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.1
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 5 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2h 41mn
Nominal bit rate                         : 10.4 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.209
Writing library                          : x264 core 135 r2345
Encoding settings                        : cabac=1 / ref=5 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=umh / subme=8 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=3 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=230 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=2pass / mbtree=1 / bitrate=10398 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=24000 / vbv_bufsize=24000 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
Language                                 : Spanish
Default                                  : Yes
Forced                                   : No
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DenyAll

DLNA master

Posts: 2257

Joined: Fri Mar 08, 2013 11:16 pm

Location: Adelaide, Australia

Post Wed Jul 31, 2013 1:13 am

Re: Why is this file transcoded ?

It's because the h264 profile level is High@L5 despite what the header of the file states - see http://wiki.serviio.org/doku.php?id=get_h264_level

This is then transcoded in accordance with the first rule in the Sony 2012 profile (which the 2011 profile inherits).
DenyAll
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NX3

DLNA master

Posts: 578

Joined: Fri Jan 28, 2011 12:39 pm

Post Wed Jul 31, 2013 6:55 pm

Re: Why is this file transcoded ?

How can you tell its level 5.1 ? It claims 4.1 which is why I was surprised to be transcoding...
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Illico

User avatar

DLNA master

Posts: 4646

Joined: Fri Jul 23, 2010 8:08 am

Location: France

Post Wed Jul 31, 2013 7:28 pm

Re: Why is this file transcoded ?

NX3 wrote:How can you tell its level 5.1 ? It claims 4.1 which is why I was surprised to be transcoding...

Do you read the wiki ? http://wiki.serviio.org/doku.php?id=get_h264_level

1920x1080x5/256=40500 ==> Level > 4.2 this is not a 4.1 level

if there were 4 refframe, it should be a 4.1 level...
Illico
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NX3

DLNA master

Posts: 578

Joined: Fri Jan 28, 2011 12:39 pm

Post Wed Jul 31, 2013 7:38 pm

Re: Why is this file transcoded ?

I have to admit I didn't full appreciate how the lv worked and was calculated. I do now so thank you.....
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DenyAll

DLNA master

Posts: 2257

Joined: Fri Mar 08, 2013 11:16 pm

Location: Adelaide, Australia

Post Wed Jul 31, 2013 11:33 pm

Re: Why is this file transcoded ?

Illico wrote:1920x1080x5/256=40500 ==> Level > 4.2 this is not a 4.1 level


Being pedantic but I also want to to double check my understanding (I make this a level 5.0) :

1920x1080x5/256=40500 ==> Level > 5.0 as the 40500 exceeds the Level 4.2 MaxDpbMbs of 34,816 (but is less than the level 5.0 MaxDpbMbs of 110,400)
DenyAll
Panasonic Viera FX800A | Panasonic Viera CS610A | Sony PS4 | Sony PS3 | Panasonic DMP-BD79 | Yamaha RX-V500D | iPad | Windows 10 | Serviio 1.10.1 Pro
WinHelper | MediaInfo

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Please do not PM me for support as any solution cannot be shared with others.
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Illico

User avatar

DLNA master

Posts: 4646

Joined: Fri Jul 23, 2010 8:08 am

Location: France

Post Thu Aug 01, 2013 10:24 am

Re: Why is this file transcoded ?

DenyAll wrote:
Illico wrote:1920x1080x5/256=40500 ==> Level > 4.2 this is not a 4.1 level


Being pedantic but I also want to to double check my understanding (I make this a level 5.0) :

1920x1080x5/256=40500 ==> Level > 5.0 as the 40500 exceeds the Level 4.2 MaxDpbMbs of 34,816 (but is less than the level 5.0 MaxDpbMbs of 110,400)


Oups,
Yes Maxbdp for 4.2 is 34816, so 40500 exceeds the level then, you are right level should be 5.0...
Illico
Sony 2010 KDL-46EX501 | BDP-S373 | SMP-N100 | Windows 8-i7 | Network DD HD-CE1.5TLU2 | Livebox2-UHD86 | ServiiDroid | ServiiGo | BubbleUPnP
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