[MEncoder-users] a/v desync with mencoder that doesn't happen with mplayer -dumpstream
Brion Swanson
deadbeefb5 at gmail.com
Tue Nov 8 05:23:35 CET 2011
On 11/05/2011 08:14 PM, The Wanderer wrote:
> On 11/05/2011 01:37 PM, Brion Swanson wrote:
>
>> On 11/04/2011 09:33 AM, The Wanderer wrote:
>
>>> Is the size of the desync consistent within any given rip, or does
>>> it vary
>>> over time as you let the movie play?
>>
>> It appears consistent but since it's so far off it's hard to tell for
>> sure if
>> it's getting farther apart or not.
>
> Yeah, that would be a bit tricky.
>
> Does the MPlayer status line report the difference (in the 'A-V:'
> value), or
> does that claim to be in sync? If it does show the difference there,
> then you
> could use that to judge whether the desync is varying or not.
>
>>> Do you get the same desync with e.g. ffplay?
>>
>> I'm not sure how to use ffplay to play the DVD directly, but if I
>> play the
>> stream.dump file there is no desync (though there is no desync in
>> mplayer
>> with that file either).
>
> I meant, do you get the desync when you play the transcoded file using
> ffplay?
>
> You've answered this in another response. That rules out one
> possibility, or at
> least makes it less likely; I've seen at least one case where MPlayer
> got the
> frame rate wrong on a particular VFR file (which had apparently been
> created
> using MEncoder), but ffplay could handle it just fine.
>
> (I really should get around to putting together a formal report about
> that.)
>
> Unfortunately, off the top of my head I don't have anything else to
> suggest,
> aside from perhaps posting a full console log of at least a playback
> session and
> possibly even the actual encoding process. There's no guarantee anyone
> would be
> able to help based on that, but it could hardly hurt... though the
> encoding log
> would probably be excessively large.
>
Poking around some more on this I found out a few interesting facts:
1. specifying -ofps 24000/1001 caused the audio to out of sync behind
the video instead of in front of it
2. specifying -ofps 30000/1001 caused the audio to be very much behind
the video
3. Benchmarking the video without audio (-nosound) did not result in
errors although allowing the video gave a VC% of about 52% while -vo
null gave a VC% of about 92% -- I don't know if that's usual or expected
4. Playing the video does not produce any significant errors (just a
couple changes from soft telecine (24000/1) to hard telecine
(30000/1001) and back
5. I tried doing a normal transcoding (instead of -oac copy and -ovc
copy) and the audio delay was still there (though the video quality was
considerably lower) and with the same amount of delay
6. There was nothing special in the encoding log that I haven't already
mentioned even when I let it complete.
Any other ideas you guys might have is appreciated. This is truly
baffling to me.
Here's my OS info:
brion at lightyear:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.10
Release: 11.10
Codename: oneiric
Here's the output of playing the video straight from the DVD (has no
audio issues):
brion at lightyear:~$ mplayer -v dvd://44 -forcedsubsonly
mplayer: Symbol `ff_codec_bmp_tags' has different size in shared object,
consider re-linking
MPlayer SVN-r33713-4.6.1 (C) 2000-2011 MPlayer Team
CPU vendor name: GenuineIntel max cpuid level: 10
CPU: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (Family: 6, Model:
15, Stepping: 11)
extended cpuid-level: 8
extended cache-info: 268468288
Detected cache-line size is 64 bytes
CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNowExt: 0 SSE: 1 SSE2: 1 SSSE3: 1
Compiled with runtime CPU detection.
get_path('codecs.conf') -> '/home/brion/.mplayer/codecs.conf'
Reading /home/brion/.mplayer/codecs.conf: Can't open
'/home/brion/.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.
init_freetype
Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay
get_path('fonts') -> '/home/brion/.mplayer/fonts'
Configuration: --prefix=/usr --confdir=/etc/mplayer --enable-xvmc
--enable-menu --disable-arts --language=all --disable-libdvdcss-internal
--disable-dvdread-internal --disable-ffmpeg_a --enable-joystick
--enable-runtime-cpudetection --enable-debug --enable-mga --enable-3dfx
--enable-tdfxfb --disable-gui
CommandLine: '-v' 'dvd://44' '-forcedsubsonly'
Using nanosleep() timing
get_path('input.conf') -> '/home/brion/.mplayer/input.conf'
Can't open input config file /home/brion/.mplayer/input.conf: No such
file or directory
Parsing input config file /etc/mplayer/input.conf
Input config file /etc/mplayer/input.conf parsed: 92 binds
Setting up LIRC support...
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote
control.
get_path('44.conf') -> '/home/brion/.mplayer/44.conf'
Playing dvd://44.
get_path('sub/') -> '/home/brion/.mplayer/sub/'
URL: dvd://44
libdvdread: Using libdvdcss version 1.2.10 for DVD access
Reading disc structure, please wait...
There are 99 titles on this DVD.
There are 1 angles in this DVD title.
libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient
libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x00006a12
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x00006ca7
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x000071e7
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_0.VOB at 0x00007209
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_1.VOB at 0x0000728c
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_04_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_04_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_05_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_05_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_06_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_06_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_07_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_07_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_08_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_08_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_09_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_09_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_10_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_10_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_11_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_11_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_12_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_12_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_13_0.VOB at 0x0000757e
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_13_1.VOB at 0x0000f2b8
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_14_0.VOB at 0x001efdb0
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_14_1.VOB at 0x001f2425
libdvdread: Elapsed time 0
libdvdread: Found 14 VTS's
libdvdread: Elapsed time 0
DVD successfully opened.
audio stream: 0 format: ac3 (5.1) language: en aid: 128.
number of audio channels on disk: 1.
subtitle ( sid ): 1 language: en
subtitle ( sid ): 3 language: fr
subtitle ( sid ): 5 language: es
subtitle ( sid ): 7 language: pt
number of subtitles on disk: 4
DVD start cell: 0 pack: 0x1010-0x2432
DVD start=4112 end=1968350
STREAM: [null] dvd://44
STREAM: Description: DVD stream
STREAM: Author:
STREAM: Comment:
DVD Seek! lba=0x1010 cell=0 packs: 0x1010-0x2432
Angle-seek synced by cell/vob IDN search!
system stream synced at 0x80800D (8421389)!
==> Found video stream: 0
MPEG-PS file format detected.
==> Found subtitle: 0
==> Found subtitle: 1
==> Found subtitle: 2
==> Found subtitle: 3
==> Found subtitle: 4
==> Found subtitle: 5
==> Found subtitle: 6
==> Found subtitle: 7
==> Found audio stream: 128
Searching for sequence header... OK!
VIDEO: MPEG2 720x480 (aspect 3) 29.970 fps 9800.0 kbps (1225.0 kbyte/s)
[V] filefmt:2 fourcc:0x10000002 size:720x480 fps:29.970 ftime:=0.0334
get_path('sub/') -> '/home/brion/.mplayer/sub/'
open: No such file or directory
[MGA] Couldn't open: /dev/mga_vid
open: No such file or directory
[MGA] Couldn't open: /dev/mga_vid
[VO_TDFXFB] Can't open /dev/fb0: Permission denied.
[VO_3DFX] Unable to open /dev/3dfx.
X11 opening display: :0
vo: X11 color mask: FFFFFF (R:FF0000 G:FF00 B:FF)
vo: X11 running at 3600x1080 with depth 24 and 32 bpp (":0" => local
display)
[x11] Detected wm supports NetWM.
[x11] Detected wm supports FULLSCREEN state.
[x11] Detected wm supports ABOVE state.
[x11] Detected wm supports BELOW state.
[x11] Current fstype setting honours FULLSCREEN ABOVE BELOW X atoms
Disabling DPMS
DPMSDisable stat: 1
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
INFO: libavcodec init OK!
Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
dec_audio: Allocating 192000 + 65536 = 257536 bytes for output buffer.
FFmpeg's libavcodec audio codec
INFO: libavcodec "ac3" init OK!
AUDIO: 48000 Hz, 2 ch, s16le, 448.0 kbit/29.17% (ratio: 56000->192000)
Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3)
==========================================================================
Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??...
[libaf] Adding filter dummy
[dummy] Was reinitialized: 48000Hz/2ch/s16le
[dummy] Was reinitialized: 48000Hz/2ch/s16le
Trying preferred audio driver 'pulse', options '[none]'
AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample)
AO: Description: PulseAudio audio output
AO: Author: Lennart Poettering
Building audio filter chain for 48000Hz/2ch/s16le -> 48000Hz/2ch/s16le...
[dummy] Was reinitialized: 48000Hz/2ch/s16le
[dummy] Was reinitialized: 48000Hz/2ch/s16le
Starting playback...
Increasing filtered audio buffer size from 0 to 50048
Unsupported PixelFormat 61
Unsupported PixelFormat 53
[ffmpeg] aspect_ratio: 1.777778
VDec: vo config request - 720 x 480 (preferred colorspace: Planar YV12)
Trying filter chain: vo
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO Config (720x480->854x480,flags=0,'MPlayer',0x32315659)
VO: [vdpau] 720x480 => 854x480 Planar YV12
VO: Description: VDPAU with X11
VO: Author: Rajib Mahapatra <rmahapatra at nvidia.com> and others
[vdpau] Updating CSC matrix for BT.601
*** [vo] Allocating mp_image_t, 720x480x12bpp YUV planar, 518400 bytes
[mpeg2video @ 0x7fa4ed8404c0]qscale == 0
[mpeg2video @ 0x7fa4ed8404c0]Warning MVs not available
[mpeg2video @ 0x7fa4ed8404c0]concealing 1035 DC, 1035 AC, 1035 MV errors
DVD sub: len=66 v_pts=0.033 s_pts=0.183 ts=16483
*** [vo] Allocating mp_image_t, 720x480x12bpp YUV planar, 518400 bytes
Unicode font: 5179 glyphs.
Unicode font: 5179 glyphs.
A: 0.5 V: 0.2 A-V: 0.246 ct: 0.003 3/ 3 ??% ??% ??,?% 2 0
*** [vo] Allocating mp_image_t, 720x480x12bpp YUV planar, 518400 bytes
A: 0.6 V: 0.6 A-V: 0.008 ct: 0.014 13/ 11 ??% ??% ??,?% 4 0
demux_mpg: 24000/1001fps progressive NTSC content detected, switching
framerate.
A: 1.9 V: 1.9 A-V: 0.001 ct: 0.032 45/ 42 10% 7% 0.7% 4 0
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