MKV -> MP4: Great video quality, choppy sound!

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mightywolve
Posts: 7
Joined: Tue May 27, 2014 7:37 pm

MKV -> MP4: Great video quality, choppy sound!

Post by mightywolve »

Dear forum,

I just downloaded HandBrake to convert MKV format to MP4 format files to
play on my apple tv (3).
For converting a MKV file I used the preset AppleTV3. Once I put the
converted file in iTunes to play on my TV it works great, video wise.
Once I play the converted file, the quality of the video is great, but the
audio is very choppy and unbearable to listen to.

Any idea what went wrong?

Thanks in advance!!

Code: Select all

HandBrake Activity Log for /Users/thomasrietveld/Downloads/the bible 01.m4v: 2014-05-27 20:19:08 +0200
Handbrake Version: 0.9.9 x86_64 (2013051800)

[20:19:08] macgui: Rip: Pending queue count is 0
[20:19:08] macgui: getNextPendingQueueIndex next pending encode index is:1
[20:19:08] macgui: scanning specifically for title: 2
[20:19:08] hb_scan: path=/Users/thomasrietveld/Documents/Films/The Bible - 01 - The Beginning – Noah, Abraham thru Jacob, Israel begins..mkv, title_index=2
libbluray/bdnav/index_parse.c:162: indx_parse(): error opening /Users/thomasrietveld/Documents/Films/The Bible - 01 - The Beginning – Noah, Abraham thru Jacob, Israel begins..mkv/BDMV/index.bdmv
libbluray/bdnav/index_parse.c:162: indx_parse(): error opening /Users/thomasrietveld/Documents/Films/The Bible - 01 - The Beginning – Noah, Abraham thru Jacob, Israel begins..mkv/BDMV/BACKUP/index.bdmv
libbluray/bluray.c:1725: nav_get_title_list(/Users/thomasrietveld/Documents/Films/The Bible - 01 - The Beginning – Noah, Abraham thru Jacob, Israel begins..mkv) failed (0x12380f400)
[20:19:08] bd: not a bd - trying as a stream/file instead
libdvdnav: Using dvdnav version 4.1.3
libdvdread: Encrypted DVD support unavailable.
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.IFO failed
libdvdnav:DVDOpenFileUDF:UDFFindFile /VIDEO_TS/VIDEO_TS.BUP failed
libdvdread: Can't open file VIDEO_TS.IFO.
libdvdnav: vm: failed to read VIDEO_TS.IFO
[20:19:08] dvd: not a dvd - trying as a stream/file instead
Input #0, matroska,webm, from '/Users/thomasrietveld/Documents/Films/The Bible - 01 - The Beginning – Noah, Abraham thru Jacob, Israel begins..mkv':
  Duration: 00:49:40.95, start: 0.000000, bitrate: N/A
    Stream #0.0(eng): Video: h264 (Constrained Baseline), yuvj420p, 1280x720 [PAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Stream #0.1(eng): Audio: ac3, 44100 Hz, stereo, fltp, 320 kb/s (default)
[20:19:08] scan: decoding previews for title 1
[20:19:08] scan: audio 0x1: AC-3, rate=44100Hz, bitrate=320000 English (AC3) (2.0 ch)
[20:19:08] scan: 10 previews, 1280x720, 23.976 fps, autocrop = 0/0/0/0, aspect 16:9, PAR 1:1
[20:19:08] libhb: scan thread found 1 valid title(s)
[20:19:09] macgui: ScanDone state received from fQueueEncodeLibhb
[20:19:09] macgui: Preset: AppleTV 3
[20:19:09] macgui: processNewQueueEncode number of passes expected is: 1
[20:19:09] macgui: Start / Stop set to chapters
[20:19:09] macgui: prepareJob exiting
[20:19:09] 1 job(s) to process
[20:19:09] starting job
[20:19:09] yadif thread started for segment 0
[20:19:09] yadif thread started for segment 1
[20:19:09] yadif thread started for segment 2
[20:19:09] yadif thread started for segment 3
[20:19:09] decomb filter thread started for segment 0
[20:19:09] decomb filter thread started for segment 1
[20:19:09] decomb filter thread started for segment 2
[20:19:09] decomb filter thread started for segment 3
[20:19:09] decomb check thread started for segment 0
[20:19:09] decomb check thread started for segment 1
[20:19:09] decomb check thread started for segment 2
[20:19:09] decomb check thread started for segment 3
[20:19:09] sync: expecting 71471 video frames
[20:19:09] job configuration:
[20:19:09]  * source
[20:19:09]    + /Users/thomasrietveld/Documents/Films/The Bible - 01 - The Beginning – Noah, Abraham thru Jacob, Israel begins..mkv
[20:19:09]    + title 1, chapter(s) 1 to 1
[20:19:09]    + container: matroska,webm
[20:19:09]  * destination
[20:19:09]    + /Users/thomasrietveld/Downloads/the bible 01.m4v
[20:19:09]    + container: MPEG-4 (.mp4 and .m4v)
[20:19:09]      + 64-bit formatting
[20:19:09]  * video track
[20:19:09]    + decoder: h264
[20:19:09]    + frame rate: 23.976 fps -> peak rate limited to 30.000 fps
[20:19:09]    + filters
[20:19:09]      + Decomb (7:2:6:9:1:80)
[20:19:09]      + Framerate Shaper (2:27000000:900000)
[20:19:09]        + frame rate: 30.000 fps -> peak rate limited to 30.000 fps
[20:19:09]      + Crop and Scale (1280:720:0:0:0:0)
[20:19:09]        + source: 1280 * 720, crop (0/0/0/0): 1280 * 720, scale: 1280 * 720
[20:19:09]    + loose anamorphic
[20:19:09]      + storage dimensions: 1280 * 720, mod 2
[20:19:09]      + pixel aspect ratio: 1 / 1
[20:19:09]      + display dimensions: 1280 * 720
[20:19:09]    + encoder: H.264 (x264)
[20:19:09]      + x264 preset: medium
[20:19:09]      + h264 profile: high
[20:19:09]      + h264 level: 4.0
[20:19:09]      + quality: 20.00 (RF)
[20:19:09]  * audio track 1
[20:19:09]    + decoder: English (AC3) (2.0 ch) (track 1, id 0x1)
[20:19:09]      + bitrate: 320 kbps, samplerate: 44100 Hz
[20:19:09]    + mixdown: Stereo
[20:19:09]    + encoder: AAC (CoreAudio)
[20:19:09]      + bitrate: 160 kbps, samplerate: 44100 Hz
[20:19:09]  * audio track 2
[20:19:09]    + decoder: English (AC3) (2.0 ch) (track 1, id 0x1)
[20:19:09]      + bitrate: 320 kbps, samplerate: 44100 Hz
[20:19:09]    + AC3 Passthru
[20:19:09] reader: first SCR 0 id 0x1 DTS 0
[20:19:09] encx264: min-keyint: 30, keyint: 300
[20:19:09] encx264: encoding with stored aspect 1/1
[20:19:09] encx264: Encoding at constant RF 20.000000
x264 [warning]: --psnr used with psy on: results will be invalid!
x264 [warning]: --tune psnr should be used if attempting to benchmark psnr!
x264 [info]: using SAR=1/1
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI1 BMI2
x264 [info]: profile High, level 4.0
~
[21:14:56] output track 1: ac3 in sync after skipping 1394 bytes
[21:14:56] sync: adding 78 ms of silence to audio 0x1  start 268147980, next 268140901
[21:14:56] output track 1: ac3 in sync after skipping 1394 bytes
[21:14:56] sync: adding 104 ms of silence to audio 0x1  start 268147980, next 268138588
[21:14:56] reader: done. 1 scr changes
[21:14:57] work: average encoding speed for job is 21.342180 fps
[21:14:57] sync: got 71468 frames, 71471 expected
[21:14:57] decomb: deinterlaced 0 | blended 0 | unfiltered 71467 | total 71467
[21:14:57] render: 71467 frames output, 0 dropped and 0 duped for CFR/PFR
[21:14:57] render: lost time: 0 (0 frames)
[21:14:57] render: gained time: 0 (0 frames) (0 not accounted for)
[21:14:57] h264-decoder done: 71468 frames, 0 decoder errors, 0 drops
x264 [info]: frame I:1114  Avg QP:15.75  size: 44692  PSNR Mean Y:51.31 U:58.80 V:58.41 Avg:52.58 Global:51.64
x264 [info]: frame P:42681 Avg QP:19.35  size: 19204  PSNR Mean Y:48.04 U:55.59 V:55.27 Avg:49.23 Global:48.15
x264 [info]: frame B:27672 Avg QP:21.67  size:  5959  PSNR Mean Y:46.57 U:54.42 V:54.05 Avg:47.74 Global:46.31
x264 [info]: consecutive B-frames: 40.6% 19.3% 12.0% 28.1%
x264 [info]: mb I  I16..4: 24.4% 49.7% 25.9%
x264 [info]: mb P  I16..4:  8.2% 15.0%  2.8%  P16..4: 42.7%  9.6%  4.3%  0.0%  0.0%    skip:17.3%
x264 [info]: mb B  I16..4:  0.5%  0.9%  0.3%  B16..8: 45.2%  3.4%  0.5%  direct: 4.7%  skip:44.5%  L0:50.5% L1:43.0% BI: 6.5%
x264 [info]: 8x8 transform intra:56.9% inter:67.0%
x264 [info]: coded y,uvDC,uvAC intra: 48.1% 42.2% 6.1% inter: 18.5% 28.1% 0.5%
x264 [info]: i16 v,h,dc,p: 36% 22% 13% 28%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 20% 23%  5%  5%  6%  6%  5%  6%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 19% 14%  7%  8%  8%  7%  6%  6%
x264 [info]: i8c dc,h,v,p: 58% 19% 19%  4%
x264 [info]: Weighted P-Frames: Y:5.4% UV:3.9%
x264 [info]: ref P L0: 75.4%  9.4% 11.0%  3.9%  0.3%
x264 [info]: ref B L0: 93.8%  5.6%  0.5%
x264 [info]: ref B L1: 97.1%  2.9%
x264 [info]: SSIM Mean Y:0.9898309 (19.927db)
x264 [info]: PSNR Mean Y:47.525 U:55.190 V:54.847 Avg:48.706 Global:47.374 kb/s:2776.00
[21:14:57] mux: track 0, 71467 frames, 1034292495 bytes, 2775.75 kbps, fifo 2048
[21:14:57] mux: track 1, 128409 frames, 32457356 bytes, 87.11 kbps, fifo 4096
[21:14:57] mux: track 2, 85597 frames, 119151782 bytes, 319.77 kbps, fifo 4096
[21:14:57] libhb: work result = 0
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mightywolve
Posts: 7
Joined: Tue May 27, 2014 7:37 pm

Re: MKV -> MP4: Great video quality, choppy sound!

Post by mightywolve »

Any idea? :)
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Smithcraft
Veteran User
Posts: 2697
Joined: Thu Jan 22, 2009 8:04 pm

Re: MKV -> MP4: Great video quality, choppy sound!

Post by Smithcraft »

Not a clue. I thought maybe it was changing the sample rate, but the sample rate is the same for the source and encoded audio.

Have you had this problem with other files?

SC
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mightywolve
Posts: 7
Joined: Tue May 27, 2014 7:37 pm

Re: MKV -> MP4: Great video quality, choppy sound!

Post by mightywolve »

Did not try it yet, with other files!
But it happend twice with the same file though..
Will test it now!

Edit: Tried it with another file, and the problem is solved! No choppy sound. So does that mean that the other file is corrupted or?
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Smithcraft
Veteran User
Posts: 2697
Joined: Thu Jan 22, 2009 8:04 pm

Re: MKV -> MP4: Great video quality, choppy sound!

Post by Smithcraft »

It's possible that the source file is corrupted, but I'm sure you've played it in the same player to see if it's good or bad to test.

Nevermind, I see that your source is an mkv and the ATVs don't care for those...

SC
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mightywolve
Posts: 7
Joined: Tue May 27, 2014 7:37 pm

Re: MKV -> MP4: Great video quality, choppy sound!

Post by mightywolve »

Its a 10 part series. All mkv format. I tried it with two episodes and they both ended up with choppy sound after conversion..
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d00dlebugs
Posts: 2
Joined: Sun Jun 22, 2014 5:24 pm

Re: MKV -> MP4: Great video quality, choppy sound!

Post by d00dlebugs »

Hello, if you have an MKV then re-encoding it is pointless and a waste of time, you need to remux it (basically like changing the wrapping paper on a gif without opening the box and repacking the contents).

I don't know if you are on mac, but if you are, great, easy tools like subler, iFlicks and others will do the job in literally 30 seconds and because its a remux not a re-encode there are no stutter problems.

My experience - converted 18TB of data from MKV to MP4/M4V for iTunes all played through ATV - no probs.

If you need any more advice on it just send me a PM.

Chris.
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