OpenELEC Testbuilds for RaspberryPi Part 2
(2013-10-04, 11:25)hudo Wrote: You should find it under System > Appearance > International
Gotham settings are being reworked . Still somewhat confusing to new users. You have to change the settings level to "Advanced", if I remember correctly.

Thankyou! - Haha, I like the first post in your link: "I fear many of us will simply go insane answering "where is X setting?" questions." Yep .. I'm totally not helping.

(2013-10-04, 12:17)popcornmix Wrote:
(2013-10-04, 03:11)theneverstill Wrote: My CPU is at 100% the whole time. Changing my output fps between 60 and 24 didn't seem to make a difference either.

Thoughts / suggestions?

Are you overclocking? That should obviously help with CPU situation.

You know, I didn't even consider to check the clock settings because I figured these builds would already include the overclock by default. Is that not the case? What are the default clock settings? (I can check when I get home, but someone else might be able to reply before I am able to do that.) I'd like to stick with the overclocks managed through the raspi-config utility. Has anyone had success with Turbo? High? Medium? I guess I'll try them all. If anyone reading this is having success with Turbo let me know.

(2013-10-04, 12:17)popcornmix Wrote: You said the videos had uncompressed PCM as audio stream? (posting mediainfo of an example file would make this clear)

Here is the media info for the first bluray-rip I was testing:

Code:
General
Complete name                            : E:\Media\Movies\BDs\Iron Man (2008)\Iron Man (2008).mkv
Format                                   : Matroska
Format version                           : Version 4 / Version 2
File size                                : 50.7 GiB
Duration                                 : 2h 6mn
Overall bit rate                         : 57.6 Mbps
Encoded date                             : UTC 2013-09-18 02:48:13
Writing application                      : mkvmerge v6.3.0 ('You can't stop me!') built on Jun 28 2013 20:09:41
Writing library                          : libebml v1.3.0 + libmatroska v1.4.0

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : [email protected]
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 2h 6mn
Width                                    : 1 920 pixels
Height                                   : 1 088 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
Writing library                          : x264 core 130 r2273 b3065e6
Encoding settings                        : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x133 / me=tesa / subme=11 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-3 / threads=12 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=16 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=10.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=62500 / vbv_bufsize=78125 / crf_max=0.0 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
Language                                 : English
Default                                  : Yes
Forced                                   : No
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 5
Format                                   : PCM
Codec ID                                 : A_PCM/INT/LIT
Duration                                 : 2h 6mn
Bit rate mode                            : Constant
Channel(s)                               : 6 channels
Sampling rate                            : 48.0 KHz
Bit depth                                : 24 bits
Default                                  : Yes
Forced                                   : No

(2013-10-04, 12:17)popcornmix Wrote: I have a vague feeling that using PCM audio struggles more than DTS/AC3. Partly due to the high bitrate. Possibly it produces a very high number of packets from demuxer.
Something I need to examine.

An interesting test would be to produce a similar video with AC3 or DTS audio, and see if playback is better or worse.

Yes, it is uncompressed PCM. I didn't even consider that that would be more difficult than dts/ac3 since it isn't compressed. Right now I'm testing the 1920x1088 vs 1920x1080 issue -- the BD encode should finish sometime tomorrow morning (constant quality 10 and placebo is painful Sleepy) .. I'll have to mux it with a few different audio formats to test it out. I'll include a downmixed 2-channel 16-bit pcm, dolby digital if it has it (since I can try passthrough on this since my tv supports it -- I'll also turn off passthrough just to see the results), as well as the best pcm. If anyone uses eac3to.. does this look like the right command to downmix to 2ch 16bit wav:?

Code:
eac3to input.pcm output.wav -down2 -down16


Messages In This Thread
AW: RE: - by DieterLumpen - 2013-07-29, 20:50
include guires switch? - by hpbaxxter - 2013-08-01, 21:46
RE: dual audio?? - by pootler - 2013-08-03, 17:13
Help, watch 3D Film on Non 3D TV - by unix72 - 2013-08-09, 12:39
Remote Controllers - by tfft - 2013-08-14, 09:11
rbej repeatable crash - by RichG - 2013-08-19, 12:43
New Tester - by theneverstill - 2013-10-03, 17:16
RE: OpenELEC Testbuilds for RaspberryPi Part 2 - by theneverstill - 2013-10-04, 16:18