[MPlayer-users] audio stutter with DTS in matroska?

Sat Nov 3 03:08:34 CET 2007

2007/11/3, Steven Adeff <adeffs.mythtv at gmail.com>:
> On 11/1/07, Ulion <ulion2002 at gmail.com> wrote:
> > 2007/11/2, Vladimir Mosgalin <mosgalin at vm10124.spb.edu>:
> > > Hi Steven Adeff!
> > >
> > >  On 2007.11.01 at 15:06:31 -0400, Steven Adeff wrote next:
> > >
> > > > > DTS audio cd is not supported by mplayer.
> > > >
> > > > darn =(  I'll look for an avi with DTS to test then.
> > >
> > > Well it may be not supported, but it works, and works very good (for
> > > quite a long time, I must say). So don't hesitate to pick a track from
> > > audio cd.
> >
> > Certainly it support decode the dts by libdca, but for passthrough,
> > probably not by hwac3.
> > I ever has a patch for ./libmpcodecs/ad_hwac3.c to detect all 4 kind
> > of DTS streams, but not commited. Current hwac3 only support 48kHz DTS
> > passthrough, you can find "DTS: Only 48kHz supported, REPORT BUG" in
> > that file. DTS cd or wav probably is 44.1kHz, so the passthrough will
> > failed.
> > But you can force the audio format to lpcm to passthrough the DTS cd
> > or wav, that works because the external decoder normaly can decode
> > such dts stream without the passthrough work from hwac3.

To passthrough DTS cd/wav, remove hwac3, and put '-ac +pcm' to your
mplayer commandline, if it still not decoded by external decoder, try
add '-format s16le' or '-format s16be' to commandline.

> >
> > Steven, since your AC3 play is no problem, maybe you can give me a
> > sample for your problem DTS mkv. And also, try to add '-v' to mplayer
> > commandline and grab the output message here to see whether any
> > abnormal thing happens.
>
> Here's the output from a DTS CD...

That's expected result.

>
> and here's the output from a mkv with a DTS track that stutters,

Looks normal, do you have any AC3 passthrough or other DTS in avi to
try and give the output?
And also, please use rc2 or svn (that's better) version to give the
output, rc1 is not supported.
Thc Crank.mkv, can you give a short sample for test? Or I forgot, did
this mkv passthrough correctly by other any player on your system? How
about other avi with DTS track?

> $ mplayer -v Crank.mkv -vo null
> MPlayer 2:1.0~rc1-0ubuntu13 (C) 2000-2006 MPlayer Team
> CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ (Family: 15,
> Model: 35, Stepping: 2)
> CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
> Compiled with runtime CPU detection.
> get_path('codecs.conf') -> '/home/mythtv/.mplayer/codecs.conf'
> Reading /home/mythtv/.mplayer/codecs.conf: Can't open
> '/home/mythtv/.mplayer/codecs.conf': No such file or directory
> Reading /etc/mplayer/codecs.conf: Can't open
> '/etc/mplayer/codecs.conf': No such file or directory
> Using built-in default codecs.conf.
> CommandLine: '-v' 'Crank.mkv' '-vo' 'null'
> init_freetype
> get_path('font/font.desc') -> '/home/mythtv/.mplayer/font/font.desc'
> font: can't open file: /home/mythtv/.mplayer/font/font.desc
> font: can't open file: /usr/share/mplayer/font/font.desc
> Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay
> Using nanosleep() timing
> get_path('input.conf') -> '/home/mythtv/.mplayer/input.conf'
> Can't open input config file /home/mythtv/.mplayer/input.conf: No such
> file or directory
> Parsing input config file /etc/mplayer/input.conf
> Input config file /etc/mplayer/input.conf parsed: 67 binds
> Setting up LIRC support...
> get_path('Crank.mkv.conf') -> '/home/mythtv/.mplayer/Crank.mkv.conf'
>
> Playing Crank.mkv.
> get_path('sub/') -> '/home/mythtv/.mplayer/sub/'
> [file] File size is 4695617000 bytes
> STREAM: [file] Crank.mkv
> STREAM: Description: File
> STREAM: Author: Albeu
> STREAM: Comment: based on the code from ??? (probably Arpi)
> CACHE_PRE_INIT: 0 [0] 778240  pre:1677721  eof:0
> Cache fill:  9.57% (802816 bytes)
> Checking for YUV4MPEG2
> ASF_check: not ASF guid!
> Checking for NuppelVideo
> Checking for REAL
> Checking for SMJPEG
> [mkv] Found the head...
> [mkv] + a segment...
> [mkv] /---- [ parsing seek head ] ---------
> [mkv] /---- [ parsing seek head ] ---------
> [mkv] \---- [ parsing seek head ] ---------
> [mkv] /---- [ parsing cues ] -----------
> [mkv] \---- [ parsing cues ] -----------
> [mkv] \---- [ parsing seek head ] ---------
> [mkv] |+ segment information...
> [mkv] | + timecode scale: 1000000
> [mkv] | + duration: 5262.257s
> [mkv] |+ segment tracks...
> [mkv] | + a track...
> [mkv] |  + Track number: 1
> [mkv] |  + Track type: Video
> [mkv] |  + Default flag: 1
> [mkv] |  + Codec ID: V_MPEG4/ISO/AVC
> [mkv] |  + CodecPrivate, length 167
> [mkv] |  + Default duration: 41.708ms ( = 23.976 fps)
> [mkv] |  + Language: eng
> [mkv] |  + Name: Crank (2006)
> [mkv] |  + Video track
> [mkv] |   + Pixel width: 1280
> [mkv] |   + Pixel height: 720
> [mkv] |   + Display width: 16
> [mkv] |   + Display height: 9
> [mkv] | + a track...
> [mkv] |  + Track number: 2
> [mkv] |  + Track type: Audio
> [mkv] |  + Default flag: 1
> [mkv] |  + Codec ID: A_DTS
> [mkv] |  + Language: eng
> [mkv] |  + Name: DTS 5.1 - 1.5 Mb/s
> [mkv] |  + Audio track
> [mkv] |   + Sampling frequency: 48000.000000
> [mkv] |   + Channels: 6
> [mkv] | + a track...
> [mkv] |  + Track number: 3
> [mkv] |  + Track type: Subtitle
> [mkv] |  + Default flag: 1
> [mkv] |  + Codec ID: S_TEXT/UTF8
> [mkv] |  + Language: eng
> [mkv] |+ found cluster, headers are parsed completely :)
> ==> Found video stream: 1
> [mkv] Aspect: 1.777778
> [mkv] Track ID 1: video (V_MPEG4/ISO/AVC) "Crank (2006)", -vid 0
> ==> Found audio stream: 2
> [mkv] Track ID 2: audio (A_DTS) "DTS 5.1 - 1.5 Mb/s", -aid 0, -alang eng
> [mkv] Track ID 3: subtitles (S_TEXT/UTF8), -sid 0, -slang eng
> [mkv] Will play video track 1
> Matroska file format detected.
> VIDEO:  [avc1]  1280x720  24bpp  23.976 fps    0.0 kbps ( 0.0 kbyte/s)
> [V] filefmt:31  fourcc:0x31637661  size:1280x720  fps:23.98  ftime:=0.0417
> get_path('sub/') -> '/home/mythtv/.mplayer/sub/'
> [vo] query(Planar YV12) -> 1
> [vo] query(Planar I420) -> 1
> [vo] query(Planar IYUV) -> 1
> [ass] auto-open
> get_path('subfont.ttf') -> '/home/mythtv/.mplayer/subfont.ttf'
> get_path('fonts') -> '/home/mythtv/.mplayer/fonts'
> [ass] Updating font cache
> [ass] Init
> ==========================================================================
> Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> INFO: libavcodec init OK!
> Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
> ==========================================================================
> ==========================================================================
> Forced audio codec: hwdts
> Opening audio decoder: [hwac3] AC3/DTS pass-through S/PDIF
> dec_audio: Allocating 8192 bytes for input buffer.
> dec_audio: Allocating 16384 + 65536 = 81920 bytes for output buffer.
> No accelerated IMDCT transform found
> hwac3: switched to DTS, 1536000 bps, 48000 Hz
> AUDIO: 48000 Hz, 2 ch, ac3, 1536.0 kbit/100.00% (ratio: 192000->192000)
> Selected audio codec: [hwdts] afm: hwac3 (DTS through S/PDIF)
> ==========================================================================
> Building audio filter chain for 48000Hz/2ch/ac3 -> 48000Hz/0ch/??...
> [libaf] Adding filter dummy
> [dummy] Was reinitialized: 48000Hz/2ch/ac3
> [dummy] Was reinitialized: 48000Hz/2ch/ac3
> alsa-init: requested format: 48000 Hz, 2 channels, 100
> alsa-init: using ALSA 1.0.14a
> alsa-spdif-init: playing AC3, 2 channels
> alsa-init: using device digital
> alsa-init: pcm opend in blocking mode
> alsa-init: chunksize set to 1024
> alsa-init: fragcount=16
> alsa-init: got buffersize=65536
> alsa-init: got period size 1024
> alsa: 48000 Hz/2 channels/4 bpf/65536 bytes buffer/Signed 16 bit Little Endian
> AO: [alsa] 48000Hz 2ch ac3 (1 bytes per sample)
> AO: Description: ALSA-0.9.x-1.x audio output
> AO: Author: Alex Beregszaszi, Zsolt Barat <joy at streamminister.de>
> AO: Comment: under developement
> Building audio filter chain for 48000Hz/2ch/ac3 -> 48000Hz/2ch/ac3...
> [dummy] Was reinitialized: 48000Hz/2ch/ac3
> [dummy] Was reinitialized: 48000Hz/2ch/ac3
> Starting playback...
> [ffmpeg] aspect_ratio: 0.000000
> VDec: vo config request - 1280 x 720 (preferred colorspace: Planar YV12)
> Trying filter chain: ass vo
> VDec: using Planar YV12 as output csp (no 0)
> Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
> VO Config (1280x720->1280x720,flags=1,'MPlayer',0x32315659)
> ass_configure: 1280 x 720; margins: l: 0, r: 0, t: 0, b: 0
> REQ: flags=0x401  req=0x0
> VO: [null] 1280x720 => 1280x720 Planar YV12  [fs]
> VO: Description: Null video output
> VO: Author: Aaron Holtzman <aholtzma at ess.engr.uvic.ca>
> *** [ass] Exporting mp_image_t, 1280x720x12bpp YUV planar, 1382400 bytes
> *** [vo] Allocating mp_image_t, 1280x720x12bpp YUV planar, 1382400 bytes
> A: 147.5 V: 147.5 A-V:  0.001 ct: -0.022 488/488 60%  1%  0.4% 1 0 49%
>
> MPlayer interrupted by signal 2 in module: sleep_timer
> Uninit audio filters...
> [libaf] Removing filter dummy
> Uninit audio: hwac3
> Uninit video: ffmpeg
>
>
> MPlayer interrupted by signal 2 in module: enable_cache
> vo: x11 uninit called but X11 not inited..
> alsa-uninit: pcm closed
> vo: x11 uninit called but X11 not inited..
>
>
>
> --
> Steve
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-- 
Ulion