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Old 17th September 2014, 13:21   #18001  |  Link
tuco76
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Quote:
Originally Posted by nevcairiel View Post
With madVR, LAV will never perform any dithering. Dithering in LAV is only performed when required, ie. when converting from 10-bit to 8-bit.
Thanks the quick reply nev!
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Old 17th September 2014, 15:31   #18002  |  Link
NikosD
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Quote:
Originally Posted by nevcairiel View Post
The file is invalid, seems like it was created before the spec was finalized.
It seems that latest official LAV filters 0.62 decode it fine!

Also, some nightly builds - even the newer ones - decode it fine.

Something from the very latest nightly builds, broke the compatibility.
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Old 17th September 2014, 15:48   #18003  |  Link
nevcairiel
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That doesn't change the reason though. There were a lot of checks added against broken samples that otherwise caused a crash, as a side-effect that can cause invalid samples that worked before (by accident) to stop working, but the sample has always been invalid, so its not a big concern.
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Old 17th September 2014, 15:54   #18004  |  Link
NikosD
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OK

Just to be sure that it's not a bug of the decoder/splitter or FFMpeg.
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Old 19th September 2014, 13:46   #18005  |  Link
jebediah
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Any idea why i don't get the correct sound from this source?
I'm using the latest Lav filter and it works great with ffdshow.

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 51mn
Bit rate : 5 606 Kbps
Width : 1 920 pixels
Height : 802 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.146
Stream size : 4.38 GiB (95%)
Writing library : x264 core 130 r2273 b3065e6
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=20.0 / 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
Default : Yes
Forced : No
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 1h 51mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 154 MiB (3%)
Default : Yes
Forced : No

Last edited by jebediah; 19th September 2014 at 14:06.
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Old 19th September 2014, 14:42   #18006  |  Link
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Quote:
Originally Posted by jebediah View Post
Any idea why i don't get the correct sound from this source?
I'm using the latest Lav filter and it works great with ffdshow.
Please define "correct sound"

Also, and IMHO, 192kbps is not sufficient bitrate for 5.1 channels...
So you have either a buggy version of MediaInfo, or a bad AC3 stream...

Code:
Codec ID : A_AC3
Duration : 1h 51mn
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
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Old 19th September 2014, 15:27   #18007  |  Link
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Without sample, this doesn't mean nothing...
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Old 19th September 2014, 18:44   #18008  |  Link
jebediah
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Quote:
Originally Posted by filler56789 View Post
Please define "correct sound"

Also, and IMHO, 192kbps is not sufficient bitrate for 5.1 channels...
So you have either a buggy version of MediaInfo, or a bad AC3 stream...
There's no sound at all, but every 5 sec or so there's a short popping sound.
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Old 19th September 2014, 19:33   #18009  |  Link
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Quote:
Originally Posted by jebediah View Post
There's no sound at all, but every 5 sec or so there's a short popping sound.
Then please demux the audio stream and post it to a filesharing site.
As Kurtnoise said, without a sample file, there will be no solution to the problem
(assuming that the problem is in the LAV filters, bien entendu).
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Old 19th September 2014, 20:41   #18010  |  Link
jebediah
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Quote:
Originally Posted by filler56789 View Post
Then please demux the audio stream and post it to a filesharing site.
As Kurtnoise said, without a sample file, there will be no solution to the problem
(assuming that the problem is in the LAV filters, bien entendu).
That's way out of my league and i have no clue how to do that.
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Old 19th September 2014, 22:16   #18011  |  Link
ThurstonX
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Quote:
Originally Posted by jebediah View Post
That's way out of my league and i have no clue how to do that.
Can you find a tool that will allow you to edit it such that you can create a 5-10 second clip? If so, post that on a decent file sharing site and provide the link. People here love to analyze clips and provide feedback, but without a clip there are so many possibilities. Gotta meet 'em half way.
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Old 19th September 2014, 22:28   #18012  |  Link
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Quote:
Originally Posted by jebediah View Post
That's way out of my league and i have no clue how to do that.
Get mkvtoolnix and start mkvmerge GUI. Drop the file into it and uncheck everything except the audio track. Go to the "global" tab, choose "split by parts based on timecodes" and enter "-1:00" (without the quotes) under "Parts". Now start muxing and upload the resulting file to a service like file-upload.net.
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Old 20th September 2014, 10:56   #18013  |  Link
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Doesn't seem to be able to handle Dolby Atmos track on transformers extinction, it just reads at dolby digital 5.1
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Old 20th September 2014, 13:19   #18014  |  Link
mastan
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Geforce GTX 980 video decoding speed:


Looks like 4K hw decoding is finally coming!
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Old 20th September 2014, 13:22   #18015  |  Link
nevcairiel
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Its the same video decoder the 750 (Ti) had, not really "news", but it is plenty fast.
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Old 20th September 2014, 14:48   #18016  |  Link
User 2014
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i've a noob question: why ffmpeg doesn't add dts audio codecs? (only supports dts)

Last edited by User 2014; 20th September 2014 at 14:54.
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Old 20th September 2014, 18:31   #18017  |  Link
Elbart_
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Bug with LAV Splitter (at least 0.58.2 and newer) playing WebM made from GIFs:

1.) Convert test.gif to test.webm with ffmpeg using:
Code:
ffmpeg -i test.gif -an -c:v libvpx test.webm
2.) Play it in MPC-HC (1.7.0 and newer) using the built-in Matroska Source Filter (which is using LAV Splitter).

3.) The video will look something like this: http://i.imgur.com/CTA8EYc.png

In Firefox, Chrome, ffplay, VLC and MPC-HC using Haali's Splitter, the video is playing fine.

test.gif and already encoded test.webm can be found here: https://www.mediafire.com/folder/yk7..._WebM-Matroska

Last edited by Elbart_; 21st September 2014 at 07:50. Reason: typo
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Old 21st September 2014, 04:59   #18018  |  Link
wanezhiling
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Quote:
Originally Posted by shadowdogg View Post
Doesn't seem to be able to handle Dolby Atmos track on transformers extinction, it just reads at dolby digital 5.1
I cut a sample file: https://www.sendspace.com/file/m2106p
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Old 21st September 2014, 12:49   #18019  |  Link
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Will there be any Dolby ATMOS integrated TrueHD software decoder soon in the near future?
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Old 21st September 2014, 13:16   #18020  |  Link
LigH
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This implies the question: Is a decoding algorithm already publicly known?

But documentation is only one factor. Legal state (license protection) may be another.
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