Hello,
in my program asb, I'm transforming MJpeg files from my Canon camera into
MPEG1 files (because it's the only format I made work on all PCs of my
family out-of-the-box on Mac, Windows and Linux). This worked quite well,
but with my new camera, I have bigger films (640x480 instead of 320x240
and 30fps instead of 15) and I get 'Frame data under-runs detected!' from
mplex.
Here the debug output:
[...]
DEBUG: Created directory '/tmp/AsbTest/.tmpmjpg'.
DEBUG: /usr/bin/transcode -i /tmp/AsbTest/0065_MVI.AVI -y ffmpeg,mp2 -F
mpeg1video --export_fps 24 -J modfps -E 22050,16 --encode_fields p
--video_max_bitrate 14969520 -o /tmp/AsbTest/.tmpmjpg/film --ext
.m1v,.mpa --print_status 10,0
PROCESSING:
..............................................................................................................................................
DEBUG: /usr/bin/mplex -r 29258 -f 0 -V -o
/tmp/AsbTest/.thumbs/medium-0065_MVI.mpg /tmp/AsbTest/.tmpmjpg/film.m1v
/tmp/AsbTest/.tmpmjpg/film.mpa
PROCESSING: ...................................
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=957
required(DTS)=957
++ WARN: [mplex] Video e0: buf= 38493 frame=000001 sector=00000019
++ WARN: [mplex] Audio c0: buf= 0 frame=000000 sector=00000000
.......................
**ERROR: [mplex] MUX STATUS: Frame data under-runs detected!
ERROR: Command '/usr/bin/mplex -r 29258 -f 0 -V -o
/tmp/AsbTest/.thumbs/medium-0065_MVI.mpg /tmp/AsbTest/.tmpmjpg/film.m1v
/tmp/AsbTest/.tmpmjpg/film.mpa' failed: at
/home/ericl/Comp/asb/WORK/asb/ASB/Item/File/Film/Mjpg.pm line 448.
If I repeat the last command, I get the following:
$ /usr/bin/mplex -r 29258 -f 0 -V -o
/tmp/AsbTest/.thumbs/medium-0065_MVI.mpg /tmp/AsbTest/.tmpmjpg/film.m1v
/tmp/AsbTest/.tmpmjpg/film.mpa
INFO: [mplex] mplex version 1.8.0 (2.2.4 $Date: 2005/08/28 17:50:54 $)
INFO: [mplex] File /tmp/AsbTest/.tmpmjpg/film.m1v looks like an MPEG
Video stream.
INFO: [mplex] File /tmp/AsbTest/.tmpmjpg/film.mpa looks like an MPEG
Audio stream.
INFO: [mplex] Found 1 audio streams and 1 video streams
INFO: [mplex] Selecting generic MPEG1 output profile
INFO: [mplex] Multiplexing video program stream!
INFO: [mplex] Scanning for header info: Video stream e0
(/tmp/AsbTest/.tmpmjpg/film.m1v)
INFO: [mplex] VIDEO STREAM: e0
INFO: [mplex] Frame width : 640
INFO: [mplex] Frame height : 480
INFO: [mplex] Aspect ratio : 1:1 (square pixels)
INFO: [mplex] Picture rate : 23.976 frames/sec
INFO: [mplex] Bit rate : variable
INFO: [mplex] Vbv buffer size : 63488 bytes
INFO: [mplex] CSPF : 0
INFO: [mplex] Scanning for header info: Audio stream c0
(/tmp/AsbTest/.tmpmjpg/film.mpa)
INFO: [mplex] MPEG AUDIO STREAM: c0
INFO: [mplex] Audio version : reserved
INFO: [mplex] Layer : 2
INFO: [mplex] CRC checksums : no
INFO: [mplex] Bit rate : 16384 bytes/sec (128 kbit/sec)
INFO: [mplex] Frequency : 22050 Hz
INFO: [mplex] Mode : 3 single channel
INFO: [mplex] Mode extension : 0
INFO: [mplex] Copyright bit : 0 no copyright
INFO: [mplex] Original/Copy : 1 original
INFO: [mplex] Emphasis : 0 none
INFO: [mplex] SYSTEMS/PROGRAM stream:
INFO: [mplex] rough-guess multiplexed stream data rate : 0135000
INFO: [mplex] target data-rate specified : 29258000
INFO: [mplex] Setting specified specified data rate: 29258000
INFO: [mplex] Run-in Sectors = 19 Video delay = 957 Audio delay = 4711
INFO: [mplex] New sequence commences...
INFO: [mplex] Video e0: buf= 0 frame=000000 sector=00000000
INFO: [mplex] Audio c0: buf= 0 frame=000000 sector=00000000
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=957
required(DTS)=957
++ WARN: [mplex] Video e0: buf= 38493 frame=000001 sector=00000019
++ WARN: [mplex] Audio c0: buf= 0 frame=000000 sector=00000000
INFO: [mplex] STREAM c0 completed @ frame 875.
INFO: [mplex] STREAM e0 completed @ frame 1096.
INFO: [mplex] Multiplex completion at SCR=4104002.
INFO: [mplex] Video e0: buf= 42594 frame=001096 sector=00005180
INFO: [mplex] Audio c0: buf= 3344 frame=000875 sector=00000362
INFO: [mplex] VIDEO_STATISTICS: e0
INFO: [mplex] Video Stream length: 10503583 bytes
INFO: [mplex] Sequence headers: 74
INFO: [mplex] Sequence ends : 0
INFO: [mplex] No. Pictures : 1097
INFO: [mplex] No. Groups : 74
INFO: [mplex] No. I Frames : 74 avg. size 30344 bytes
INFO: [mplex] No. P Frames : 1024 avg. size 8057 bytes
INFO: [mplex] No. B Frames : 0 avg. size 0 bytes
INFO: [mplex] Average bit-rate : 1834800 bits/sec
INFO: [mplex] Peak bit-rate : 4122800 bits/sec
INFO: [mplex] BUFFERING min 15 Buf max 44340
INFO: [mplex] AUDIO_STATISTICS: c0
INFO: [mplex] Audio stream length 732264 bytes.
INFO: [mplex] Syncwords : 876
INFO: [mplex] Frames : 72 padded
INFO: [mplex] Frames : 804 unpadded
INFO: [mplex] BUFFERING min 17 Buf max 849
**ERROR: [mplex] MUX STATUS: Frame data under-runs detected!
And MPlayer tells me the following about the starting file:
$ mplayer -identify /tmp/AsbTest/0065_MVI.AVI
[...]
Playing /tmp/AsbTest/0065_MVI.AVI.
AVI file format detected.
ID_VIDEO_ID=0
ID_AUDIO_ID=1
VIDEO: [MJPG] 640x480 24bpp 30.000 fps 14969.5 kbps (1827.3 kbyte/s)
Clip info:
Digitization Time: SUN SEP 03 13:21:56 2006
ID_CLIP_INFO_NAME0=Digitization Time
ID_CLIP_INFO_VALUE0=SUN SEP 03 13:21:56 2006
Software: CanonMVI02
ID_CLIP_INFO_NAME1=Software
ID_CLIP_INFO_VALUE1=CanonMVI02
ID_CLIP_INFO_N=2
ID_FILENAME=/tmp/AsbTest/0065_MVI.AVI
ID_DEMUXER=avi
ID_VIDEO_FORMAT=MJPG
ID_VIDEO_BITRATE=14969520
ID_VIDEO_WIDTH=640
ID_VIDEO_HEIGHT=480
ID_VIDEO_FPS=30.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=1
ID_AUDIO_BITRATE=88192
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0
ID_LENGTH=45.93
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: No such file or directory.
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG decoder)
==========================================================================
ID_VIDEO_CODEC=ffmjpeg
==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 11024 Hz, 1 ch, u8, 88.2 kbit/100.00% (ratio: 11024->11024)
ID_AUDIO_BITRATE=11024
ID_AUDIO_RATE=11024
ID_AUDIO_NCH=1
Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)
==========================================================================
alsa-init: using device default
alsa: 48000 Hz/1 channels/1 bpf/16384 bytes buffer/Unsigned 8 bit
AO: [alsa] 48000Hz 1ch u8 (1 bytes per sample)
ID_AUDIO_CODEC=pcm
[...]
I understand that it has something to do with the -r parameter of mplex,
but I can't seem to find a good value for it. I went so high that I
reached some overflow value. Any idea/hint on what I should/could change
on my mplex command or even before?
A code snippet to show how I currently come to my values:
# ID_AUDIO_BITRATE and ID_VIDEO_BITRATE from original AVI/MJPEG file
my $abr = $self->{'extra_h'}->{'ID_AUDIO_BITRATE'};
my $vbr = $self->{'extra_h'}->{'ID_VIDEO_BITRATE'};
my $maxvbr = int (2 * ($vbr + $abr) / 1024);
And then:
transcode [...] --video_max_bitrate $vbr [...]
mplex [...] -r $maxvbr [...]
(I suspect that video_max_bitrate has no influence as I'm creating MPEG1
files and the man page speaks only about MPEG2, but adding/removing this
parameter doesn't change anything)
Thanks, Eric
Some more info:
---------------
Package: transcode
Version: 2:1.0.2-0.11
Severity: normal
*** Please type your report below this line ***
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.16-18nc6k1
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8)
Versions of packages transcode depends on:
ii gawk 1:3.1.5.dfsg-4 GNU awk, a pattern scanning
and pr
ii gnome-terminal [x-t 2.14.2-1 The GNOME 2 terminal emulator
appl
ii konsole [x-terminal 4:3.5.5a-2 X terminal emulator for KDE
ii liba52-0.7.4 0.7.4-4 Library for decoding ATSC
A/52 str
ii libaa1 1.4p5-30 ascii art library
ii libartsc0 1.5.5-1 aRts sound system C support
librar
ii libasound2 1.0.13-1 ALSA library
ii libaudio2 1.8-2 The Network Audio System
(NAS). (s
ii libaudiofile0 0.2.6-6 Open-source version of SGI's
audio
ii libavcodeccvs51 3:20060814-0.3 library to encode decode
multimedi
ii libavutilcvs49 3:20060814-0.3 avutil shared libraries
ii libbz2-1.0 1.0.3-6 high-quality block-sorting
file co
ii libc6 2.3.6.ds1-4 GNU C Library: Shared libraries
ii libdirectfb-0.9-25 0.9.25.1-4 direct frame buffer graphics
- sha
ii libdv4 1.0.0-1 software library for DV
format dig
ii libdvdread3 0.9.7-1 library for reading DVDs
ii libesd0 0.2.36-3 Enlightened Sound Daemon -
Shared
ii libfaac0 1.25-0.1 an AAC audio encoder -
library fil
ii libfaad2-0 2.5-0.1 freeware Advanced Audio
Decoder -
ii libfame-0.9 0.9.1-0.2 A video encoding library -
runtime
ii libfreetype6 2.2.1-5 FreeType 2 font engine,
shared lib
ii libgcc1 1:4.1.1-13 GCC support library
ii libglib1.2 1.2.10-13 The GLib library of C routines
ii libglib2.0-0 2.12.4-1 The GLib library of C routines
ii libgsm1 1.0.10-13 Shared libraries for GSM
speech co
ii libgtk1.2 1.2.10-18 The GIMP Toolkit set of
widgets fo
ii libice6 1:1.0.1-2 X11 Inter-Client Exchange
library
ii libjasper-1.701-1 1.701.0-2 The JasPer JPEG-2000 runtime
libra
ii libjpeg62 6b-13 The Independent JPEG Group's
JPEG
ii liblame0 3.97-0.0 LAME Ain't an MP3 Encoder
ii liblcms1 1.15-1 Color management library
ii liblzo1 1.08-3 data compression library (old
vers
ii libmagick9 7:6.2.4.5.dfsg1-0.10 Image manipulation library
ii libmjpegtools0 1:1.8.0-0.4 MJPEG video
capture/editting/playb
ii libmpeg2-4 0.4.0b-4 MPEG1 and MPEG2 video decoder
libr
ii libncurses5 5.5-5 Shared libraries for terminal
hand
ii libogg0 1.1.3-2 Ogg Bitstream Library
ii libpng12-0 1.2.8rel-7 PNG library - runtime
ii libpostproccvs51 3:20060814-0.3 postproc shared libraries
ii libpvm3 3.4.5-7 Parallel Virtual Machine -
shared
ii libquicktime0 2:0.9.7-1 library for reading and
writing Qu
ii libsdl1.2debian 1.2.11-4 Simple DirectMedia Layer
ii libslang2 2.0.6-4 The S-Lang programming
library - r
ii libsm6 1:1.0.1-3 X11 Session Management library
ii libstdc++6 4.1.1-13 The GNU Standard C++ Library v3
ii libsvga1 1:1.4.3-23 console SVGA display libraries
ii libtheora0 0.0.0.alpha7-1 The Theora Video Compression
Codec
ii libtiff4 3.8.2-6 Tag Image File Format (TIFF)
libra
ii libvorbis0a 1.1.2.dfsg-1.2 The Vorbis General Audio
Compressi
ii libvorbisenc2 1.1.2.dfsg-1.2 The Vorbis General Audio
Compressi
ii libvorbisfile3 1.1.2.dfsg-1.2 The Vorbis General Audio
Compressi
ii libx11-6 2:1.0.3-2 X11 client-side library
ii libxaw7 1:1.0.2-4 X11 Athena Widget library
ii libxext6 1:1.0.1-2 X11 miscellaneous extension
librar
ii libxi6 1:1.0.1-3 X11 Input extension library
ii libxml2 2.6.26.dfsg-4 GNOME XML library
ii libxpm4 1:3.5.5-2 X11 pixmap library
ii libxt6 1:1.0.2-2 X11 toolkit intrinsics library
ii libxv1 1:1.0.2-1 X11 Video extension library
ii libxvidcore4 2:1.1.0-final-0.1 High quality ISO MPEG4 codec
libra
ii rxvt-unicode [x-ter 7.9-2 RXVT-like terminal emulator
with U
ii xfce4-terminal [x-t 0.2.5.6rc1-2 Xfce terminal emulator
ii xterm [x-terminal-e 210-3.1 X terminal emulator
ii zlib1g 1:1.2.3-13 compression library - runtime
Versions of packages transcode recommends:
ii mjpegtools 1:1.8.0-0.4 MJPEG video
capture/editting/playb
ii sox 12.17.9-1 A universal sound sample
translato
ii toolame 02l-3 MPEG-1 layer 2 audio encoder
ii transcode-doc 2:1.0.2-0.11 Documentation for transcode
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