Choppy broken audio from blu-ray MKV

[Majendie]

Hi guys,

I've been having some trouble with the audio in my encoding - I'm using MakeMKV to get an MKV directly from a blu-ray, then attempting to compress using Handbrake. I've tried 4-5 times with a couple of different files with exactly the same result.

From what I can interpret from the log file it does seem to contain all the encoding information I have specified, however for clarity I am attempting to encode into an .mkv file using Constant Quality x264, specifying a file size (10GB) instead of a quality setting (still experimenting with that - any suggestions there?) and using passthrough AC3 audio settings. Different video settings I have tried have changed the size of the file but not the audio issue, similarly with different audio settings. Latest attempts using the AC3 settings as I figured out that it was not altering the audio that way but still the same result as below. I am using Handbrake 0.9.3, not the development snapshot (although I will try with that tonight).

Video is fine - no issues at all. However the audio is universally choppy, although it is in sync with the video. By choppy, I mean broken, not hissy or crackly or anything like that - sounds ok, I'm just getting it in little pieces. The log file has what looks pretty clearly like the issue coming up -

[11:35:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748154880, current 748154880)
[11:35:32] sync: adding 128 ms of silence to audio 0 start 748169280, next 748157760

Repeated ad nauseum. I've attempted to upload the log file the pastebin - may require and edit to get it working.

I appreciate any help and or advice anyone is able to offer!

Thankyou,

- M

[s55]

If the log is too big, you can get away with cutting out alot of the duplicate lines and just place a marker saying "[Repeated a few hundred times]"

[Majendie]

Here's the log -

- - -
### Windows GUI 0.9.3 2008112300
### Running: Microsoft Windows NT 6.1.7600.0
###
### CPU: Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz
### Ram: 4094 MB
### Screen: 1920x1080
### Temp Dir: C:\Users\Media\AppData\Local\Temp\
### Install Dir: C:\Program Files (x86)\HandBrake
### Data Dir: C:\Users\Media\AppData\Roaming\HandBrake\HandBrake\0.9.3.0
#########################################

### CLI Query: -i "D:\Movies\Jerry Maguire.mkv" -t 1 -c 1 -o "G:\Incoming movies\Compressed\Jerry Maguire.mkv" -f mkv -p -e x264 -S 10000 -a 1 -E ac3 -B 160 -6 dpl2 -D 1 --markers="C:\Users\Media\AppData\Local\Temp\Jerry Maguire.mkv-1-chapters.csv" -x ref=3:mixed-refs=1:bframes=3:b-pyramid=1:weightb=1:deblock=-2,-1:trellis=1:analyse=all:8x8dct=1:me=umh:subq=9:psy-rd=1,1 -v
#########################################
[22:05:24] hb_init: checking cpu count
[22:05:24] hb_init: starting libhb thread
HandBrake 0.9.3 (2008112300) - http://handbrake.fr/
4 CPUs detected
Opening D:\Movies\Jerry Maguire.mkv...
[22:05:24] hb_scan: path=D:\Movies\Jerry Maguire.mkv, title_index=1
[22:05:24] scan: trying to open with libdvdread
[22:05:24] dvd: not a dvd - trying as a stream/file instead
Input #0, matroska, from 'D:\Movies\Jerry Maguire.mkv':
Duration: 02:18:33.34, start: 0.000000, bitrate: N/A
Stream #0.0(eng): Video: h264, yuv420p, 1920x1080, 23.98 tb(r)
Stream #0.1(eng): Audio: ac3, 48000 Hz, 5:1, s16
Stream #0.2(eng): Subtitle: 0x0000
[22:05:25] scan: decoding previews for title 1
[22:05:25] scan: audio 0x1: AC-3, rate=48000Hz, bitrate=640000 English (AC3) (5.1 ch)
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
Scanning title 1...
[22:05:29] scan: 10 previews, 1920x1080, 23.976 fps, autocrop = 0/0/0/0, aspect 16:9, PAR 1:1
[22:05:29] scan: title (0) job->width:1936, job->height:1088
Scanning title 1[22:05:29] libhb: scan thread found 1 valid title(s)
...
+ title 1:
+ vts 0, ttn 0, cells 0->0 (0 blocks)
+ duration: 02:18:33
+ size: 1920x1080, aspect: 1.78, 23.976 fps
+ autocrop: 0/0/0/0
+ chapters:
+ 1: cells 0->0, 0 blocks, duration 02:18:33
+ audio tracks:
+ 1, English (AC3) (5.1 ch), 48000Hz, 640000bps
+ subtitle tracks:
Reading chapter markers from file C:\Users\Media\AppData\Local\Temp\Jerry Maguire.mkv-1-chapters.csv
Calculated bitrate: 9447 kbps
[22:05:30] 1 job(s) to process
[22:05:30] starting job
[22:05:30] job configuration:
[22:05:30] * source
[22:05:30] + D:\Movies\Jerry Maguire.mkv
[22:05:30] + title 1, chapter(s) 1 to 1
[22:05:30] + container: matroska
[22:05:30] * destination
[22:05:30] + G:\Incoming movies\Compressed\Jerry Maguire.mkv
[22:05:30] + container: Matroska (.mkv)
[22:05:30] + chapter markers
[22:05:30] * video track
[22:05:30] + decoder: h264
[22:05:30] + frame rate: same as source (around 23.976 fps)
[22:05:30] + strict anamorphic
[22:05:30] + storage dimensions: 1920 * 1080 -> 1920 * 1080, crop 0/0/0/0
[22:05:30] + pixel aspect ratio: 1 / 1
[22:05:30] + display dimensions: 1920 * 1080
[22:05:30] + encoder: x264
[22:05:30] + options: ref=3:mixed-refs=1:bframes=3:b-pyramid=1:weightb=1:deblock=-2,-1:trellis=1:analyse=all:8x8dct=1:me=umh:subq=9:psy-rd=1,1
[22:05:30] + bitrate: 9447 kbps, pass: 0
[22:05:30] * audio track 0
[22:05:30] + decoder: English (AC3) (5.1 ch) (track 1, id 1)
[22:05:30] + bitrate: 640 kbps, samplerate: 48000 Hz
[22:05:30] + AC3 passthrough
[22:05:30] dvd: not a dvd - trying as a stream/file instead
[22:05:30] encx264: keyint-min: 24, keyint-max: 240
[22:05:30] encx264: encoding with stored aspect 1/1
x264 [info]: using SAR=1/1
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 PHADD SSE4.1 Cache64
x264 [info]: profile High, level 4.0
No accelerated IMDCT transform found
[22:05:30] sync: expecting 199344 video frames
[h264 @ 0x1b18af0]insufficient thread locking around avcodec_open/close()
[h264 @ 0x1b18af0]insufficient thread locking around avcodec_open/close()
[22:05:30] reader: first SCR 0
[22:05:31] sync: adding 96 ms of silence to audio 0 start 100800, next 92160
[22:05:31] sync: adding 160 ms of silence to audio 0 start 120960, next 106560
[22:05:31] sync: adding 128 ms of silence to audio 0 start 135360, next 123840
[22:05:31] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 138240, current 138240)
[22:05:31] sync: adding 128 ms of silence to audio 0 start 152640, next 141120
[22:05:31] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 155520, current 155520)
[22:05:31] sync: adding 128 ms of silence to audio 0 start 169920, next 158400
[22:05:31] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 172800, current 172800)
[22:05:31] sync: adding 128 ms of silence to audio 0 start 187200, next 175680
[22:05:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 190080, current 190080)
[22:05:32] sync: adding 128 ms of silence to audio 0 start 204480, next 192960
[22:05:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 207360, current 207360)
[22:05:32] sync: adding 128 ms of silence to audio 0 start 221760, next 210240
[22:05:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 224640, current 224640)
[22:05:32] sync: adding 128 ms of silence to audio 0 start 239040, next 227520...

. . . Repeats a couple of times a second for 12 hours of encode time . . . .

...[11:35:31] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748085760, current 748085760)
[11:35:32] sync: adding 128 ms of silence to audio 0 start 748100160, next 748088640
[11:35:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748103040, current 748103040)
[11:35:32] sync: adding 128 ms of silence to audio 0 start 748117440, next 748105920
[11:35:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748120320, current 748120320)
[11:35:32] sync: adding 128 ms of silence to audio 0 start 748134720, next 748123200
[11:35:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748137600, current 748137600)
[11:35:32] sync: adding 128 ms of silence to audio 0 start 748152000, next 748140480
[11:35:32] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748154880, current 748154880)
[11:35:32] sync: adding 128 ms of silence to audio 0 start 748169280, next 748157760
[11:35:33] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748172160, current 748172160)
[11:35:33] sync: adding 128 ms of silence to audio 0 start 748186560, next 748175040
[11:35:33] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748189440, current 748189440)
[11:35:33] sync: adding 128 ms of silence to audio 0 start 748203840, next 748192320
[11:35:33] sync: audio 0 time went backwards 0 ms, dropped 4 frames (next 748206720, current 748206720)
[11:35:33] sync: adding 128 ms of silence to audio 0 start 748221120, next 748209600
[11:35:33] sync: got 199320 frames, 199344 expected
[11:35:33] work: average encoding speed for job is 4.101209 fps
[11:35:33] h264-decoder done: 199321 frames, 0 decoder errors, 0 drops
[11:35:33] render: lost time: 0 (0 frames)
[11:35:33] render: gained time: 0 (0 frames) (0 not accounted for)
x264 [info]: slice I:2436 Avg QP:21.55 size:125177 PSNR Mean Y:44.33 U:49.22 V:50.62 Avg:45.42 Global:44.84
x264 [info]: slice P:141439 Avg QP:24.09 size: 59965 PSNR Mean Y:43.72 U:45.33 V:48.15 Avg:44.29 Global:43.70
x264 [info]: slice B:55445 Avg QP:26.62 size: 13250 PSNR Mean Y:42.52 U:49.05 V:51.86 Avg:43.34 Global:42.01
x264 [info]: consecutive B-frames: 49.7% 36.3% 6.0% 8.1%
x264 [info]: mb I I16..4: 13.9% 78.1% 8.0%
x264 [info]: mb P I16..4: 1.5% 7.3% 0.2% P16..4: 60.9% 10.8% 5.9% 0.0% 0.0% skip:13.4%
x264 [info]: mb B I16..4: 0.2% 0.4% 0.0% B16..8: 32.8% 0.4% 0.6% direct: 1.7% skip:63.9% L0:41.9% L1:47.8% BI:10.3%
x264 [info]: final ratefactor: 25.48
x264 [info]: 8x8 transform intra:80.4% inter:85.0%
x264 [info]: ref P L0 56.0% 24.0% 19.9%
x264 [info]: ref B L0 73.2% 26.8%
x264 [info]: ref B L1 96.9% 3.1%
x264 [info]: SSIM Mean Y:0.9708419
x264 [info]: PSNR Mean Y:43.392 U:46.412 V:49.212 Avg:44.044 Global:43.167 kb/s:9162.21
[11:35:33] libhb: work result = 0
Rip done!

############ End of Log ##############


Thanks!

[JohnAStebbins]

First a suggestion, try the development snapshot. I just tested an mkv generated by makemkv using the latest hb and it worked fine for me.

Second a question. What version of makemkv are you using? I used 1.4.7 beta.

[Thakorr]

I'm having a very similar problem. Would be great if someone could post a possible fix or let me know if the issue is resolved with the snapshot.

[Deleted User 11865]

I'm having a very similar problem. Would be great if someone could post a possible fix or let me know if the issue is resolved with the snapshot.

Why don't you try the snapshot for yourself?

[KidNovak]

I also had choppy audio (AC3 5.1) from a Blu-ray MKV using Handbrake 0.9.3.
I switched to HandBrake SVN2845 Snapshot and now my audio is perfect.

Novak

[Tommasino]

First a suggestion, try the development snapshot.

WOW! Thanks so much to all the dev team. This version has solved _ALL_ my audio problems while encoding mkv!!!