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PostPosted: Sat May 05, 2018 7:20 pm 
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Joined: Sat May 05, 2018 4:30 pm
Posts: 2
I'm slowly working through digitizing my library and have stumbled onto a problem with Pirates of the Caribbean 1 and 2, but seemingly not 3. These are the "standard" Region A releases.

Here's the setup:

Rip: MakeMKV 1.12.2 on Win10 x64 (problem also occurred with 1.12.0)
Encode: Handbrake 1.1.0 on Debian x64 (also occurred with 1.0.7).

POTC 1/2/3 - MPEG4 with LPCM 24bit 48KHz audio. Encoding to HEVC and 24-bit FLAC.

Briefly my results:

POTC 1 - final HEVC file appears intact w/metadata, but there is no audio playback at all
POTC 2 - final HEVC file appears intact w/metadata, but there are frequent skips/gaps in audio playback
POTC 3 - final HEVC file appears intact w/metadata, so far I have not found any audio defects

Playback was tested with the latest builds of VLC and MPC-HC, identical results. Neither player produces any kind of warnings or errors, so it does not appear to be an issue with decoding the HEVC file.

Long version:

I ripped and encoded these as a batch using the same workflow I've done for 150+ already in my library. In this case, PCM is the only lossless track available and needs to be converted to FLAC for downstream compatibility reasons. I have used FLAC for titles with PCM audio plenty of times before without issue.

Since POTC 3 passed a spot check, I purged the original source rips/logs before becoming aware of the problem, so since then I've been focusing just on POTC 1. I've re-ripped it multiple times, with identical results - no MakeMKV errors and identical output files. No errors or warnings in the MakeMKV debug log. The original ripped MKV appears perfectly normal and plays back with audio throughout. Likewise, Handbrake performs the encode with no errors or other unusual output except for the following when beginning the job:

Code:
[14:17:29] scan: decoding previews for title 1
[14:17:29] scan: audio 0x1: pcm_s24le, rate=48000Hz, bitrate=6912000 English (pcm_s24le) (5.1 ch)
Scanning title 1 of 1, preview 6, 60.00 %[14:17:34] scan: could not get a decoded picture
Scanning title 1 of 1, preview 9, 90.00 %[14:17:36] scan: could not get a decoded picture
Scanning title 1 of 1, preview 10, 100.00 %[14:17:37] scan: 8 previews, 1920x1080, 23.976 fps, autocrop = 140/140/0/4, aspect 16:9, PAR 1:1


After re-ripping the disc a few times, I noticed that the two warnings above always occur at preview 6 and 9.

I haven't had a need to carefully watch all of my encode logs as this is the first real problem I've had, but I'm pretty sure I haven't seen this message before. Some brief searching found a few hits referencing running Handbrake against encrypted DVDs, but nothing specific to what I'm seeing. The issue would appear to be with the source media; I do all this with scripts, and the same script that produced the defective POTC 1 HEVC also produced the intact POTC 3 HEVC.

I'm just at a loss as to what the problem is, since there are no MakeMKV warnings and the source file appears perfect, unless it's Cinavia...but my neanderthal understanding was that Cinavia was only a concern if I was creating an "actual" Blu-Ray Disc and playing back with an actual player or software like Powerdvd/etc. I also have at least two other Cinavia-protected titles (Inglourious Basterds, Looper) that I had no trouble with. The physical disks are in excellent condition and clean with no apparent defects.

I'm not sure what to look for next! Is this copy protection, a MakeMKV error/decryption problem, bad metadata, a Handbrake error?

Thanks!

ps -

Handbrake job final output - no errors:

Code:
[11:09:04] pcm_s24le-decoder done: 257847 frames, 0 decoder errors
[11:09:04] h264-decoder done: 206071 frames, 0 decoder errors
[11:09:04] sync: got 206071 frames, 206071 expected
[11:09:04] sync: framerate min 23.981 fps, max 23.981 fps, avg 23.976 fps
x265 [info]: frame I:   2574, Avg QP:22.57  kb/s: 13532.84
x265 [info]: frame P:  49897, Avg QP:23.23  kb/s: 7036.89
x265 [info]: frame B: 153600, Avg QP:23.29  kb/s: 5555.61
x265 [info]: Weighted P-Frames: Y:5.9% UV:4.0%
x265 [info]: consecutive B-frames: 7.9% 5.0% 14.5% 31.8% 40.9%

encoded 206071 frames in 10108.39s (20.39 fps), 6013.92 kb/s, Avg QP:23.27
[11:09:04] mux: track 0, 206071 frames, 6461940781 bytes, 6014.63 kbps, fifo 102                                                                                                                               4
[11:09:04] mux: track 1, 89531 frames, 1527079130 bytes, 1421.37 kbps, fifo 512
[11:09:04] mux: track 2, 3851 frames, 24604038 bytes, 22.90 kbps, fifo 32
[11:09:04] libhb: work result = 0

Encode done!

HandBrake has exited.


MediaInfo from the ripped source file:

Code:
General
Unique ID : 181386109479906251148306218139020131357 (0x8875B1A84D2764958FB423B796C37C1D)
Complete name : \\blah\scratch\rip-input\title00.mkv
Format : Matroska
Format version : Version 2
File size : 27.0 GiB
Duration : 2 h 23 min
Overall bit rate : 27.0 Mb/s
Encoded date : UTC 2018-05-05 16:36:01
Writing application : MakeMKV v1.12.2 win(x64-release)
Writing library : libmakemkv v1.12.2 (1.3.5/1.4.7) win(x64-release)

Video
ID : 1
ID in the original source medium : 4113 (0x1011)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings : CABAC / 3 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 3 frames
Format settings, GOP : M=3, N=24
Codec ID : V_MPEG4/ISO/AVC
Duration : 2 h 23 min
Bit rate : 20.1 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.403
Stream size : 20.1 GiB (74%)
Language : English
Default : No
Forced : No
Original source medium : Blu-ray

Audio
ID : 2
ID in the original source medium : 4352 (0x1100)
Format : PCM
Format settings : Little / Signed
Codec ID : A_MS/ACM / 00000001-0000-0010-8000-00AA00389B71
Duration : 2 h 23 min
Bit rate mode : Constant
Bit rate : 6 912 kb/s / 6 912 kb/s
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 30.000 FPS (1600 SPF)
Bit depth : 24 bits
Stream size : 6.92 GiB (26%)
Title : Surround 5.1
Language : English
Default : Yes
Forced : No
Original source medium : Blu-ray

Text
ID : 3
ID in the original source medium : 4608 (0x1200)
Format : PGS
Codec ID : S_HDMV/PGS
Codec ID/Info : Picture based subtitle format used on BDs/HD-DVDs
Duration : 2 h 12 min
Bit rate : 24.7 kb/s
Count of elements : 3851
Stream size : 23.5 MiB (0%)
Language : English
Default : No
Forced : No
Original source medium : Blu-ray

Menu
00:00:00.000 : en:Chapter 01
00:08:51.280 : en:Chapter 02
00:16:05.547 : en:Chapter 03
00:27:16.343 : en:Chapter 04
00:35:59.323 : en:Chapter 05
00:41:02.960 : en:Chapter 06
00:48:19.938 : en:Chapter 07
00:54:01.279 : en:Chapter 08
01:04:05.675 : en:Chapter 09
01:15:56.802 : en:Chapter 10
01:21:21.418 : en:Chapter 11
01:35:00.152 : en:Chapter 12
01:40:00.744 : en:Chapter 13
01:48:15.614 : en:Chapter 14
02:02:02.189 : en:Chapter 15
02:13:09.648 : en:Chapter 16


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PostPosted: Mon May 07, 2018 2:47 am 
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Joined: Sat May 05, 2018 4:30 pm
Posts: 2
I've managed to work around this problem using a few of the techniques suggested in the PCM to FLAC sticky:

1. Audio track converted to FLAC and remuxed to original BR rip MKV via FFMPEG
2. mkclean utility run on ffmpeg result file

The mkclean result file was run through Handbrake for HEVC encode with FLAC audio passthrough, and everything came out great.

I tried just mkclean first on the BR rip with PCM but it made no difference, still no audio after encode. I don't know if it made a difference with the FFMPEG workflow but it didn't hurt.

Not sure what's special/different about these particular titles, but it's not a terribly painful workaround.


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