Video playback is too fast.

[Nobody/Anonymous]

Greetings,

I was having problems with xvidcap in the Ubuntu repositories as it always only captured one frame. So I downloaded the tarball of xvidcap, built it successfully, but when I record something and play it, it is played back at a very accelerated / too accelerated / very fast / too fast videp playback rate. I have an example at http://willard.madscience.dk/error.tar (I will probably not keep that file there forever, though), along with the log, which I have displayed below for convenience.

What I did was the following:

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willard@njordur:~/xvidcap-submit/error
> /home/willard/bin/xvidcap -v --cap_geometry 1024x768+0+0 --gui no --file error.avi > error.log

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However, when I play the video, it is way too fast.

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willard@njordur:~/xvidcap-submit/error
> mplayer -fs error.avi

[a very accelerated video playback]

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Some details:

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willard@njordur:~/xvidcap-submit/error
> cat error.log

Current settings:
flags = 1571
capture mode = multi-frame
position = 1024x768+0+0
rescale output to = 100
frames per second = 10,00
file pattern = error.avi
file format = AUTO
video encoding = AUTO
audio codec = AUTO
verbose level = 1
frame start no = 0
frames to store = 0
time to capture = 0 sec
autocontinue = no
input source = shm (2)
capture pointer = white
capture audio = yes
- input = /dev/dsp
- sample rate = 44100
- bit rate = 64000
- channels = 2
animate command = mplayer "${XVFILE}" &
make video command= xterm -e "echo not needed for multi-frame capture; echo hit enter to dismiss; read"
edit frame command= xterm -e "echo none specified; echo hit enter to dismiss; read"
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missing -392 milli secs (100 needed per frame), pic no 425
missing -392 milli secs (100 needed per frame), pic no 426
missing -389 milli secs (100 needed per frame), pic no 427
missing -391 milli secs (100 needed per frame), pic no 428
missing -388 milli secs (100 needed per frame), pic no 429
missing -392 milli secs (100 needed per frame), pic no 430
missing -393 milli secs (100 needed per frame), pic no 431
missing -386 milli secs (100 needed per frame), pic no 432
missing -387 milli secs (100 needed per frame), pic no 433
missing -391 milli secs (100 needed per frame), pic no 434
missing -390 milli secs (100 needed per frame), pic no 435
missing -390 milli secs (100 needed per frame), pic no 436
missing -387 milli secs (100 needed per frame), pic no 437
missing -390 milli secs (100 needed per frame), pic no 438
missing -390 milli secs (100 needed per frame), pic no 439
missing -390 milli secs (100 needed per frame), pic no 440
missing -388 milli secs (100 needed per frame), pic no 441
missing -393 milli secs (100 needed per frame), pic no 442
missing -388 milli secs (100 needed per frame), pic no 443
missing -387 milli secs (100 needed per frame), pic no 444
missing -388 milli secs (100 needed per frame), pic no 445
missing -390 milli secs (100 needed per frame), pic no 446
missing -388 milli secs (100 needed per frame), pic no 447
missing -390 milli secs (100 needed per frame), pic no 448
missing -392 milli secs (100 needed per frame), pic no 449
missing -413 milli secs (100 needed per frame), pic no 450
missing -388 milli secs (100 needed per frame), pic no 451
missing -388 milli secs (100 needed per frame), pic no 452
missing -447 milli secs (100 needed per frame), pic no 453
missing -394 milli secs (100 needed per frame), pic no 454
missing -391 milli secs (100 needed per frame), pic no 455
missing -390 milli secs (100 needed per frame), pic no 456
missing -388 milli secs (100 needed per frame), pic no 457
missing -390 milli secs (100 needed per frame), pic no 458
missing -390 milli secs (100 needed per frame), pic no 459
missing -389 milli secs (100 needed per frame), pic no 460
missing -387 milli secs (100 needed per frame), pic no 461
missing -393 milli secs (100 needed per frame), pic no 462
missing -391 milli secs (100 needed per frame), pic no 463
missing -391 milli secs (100 needed per frame), pic no 464
missing -389 milli secs (100 needed per frame), pic no 465
missing -390 milli secs (100 needed per frame), pic no 466
missing -390 milli secs (100 needed per frame), pic no 467
missing -390 milli secs (100 needed per frame), pic no 468
missing -390 milli secs (100 needed per frame), pic no 469
missing -390 milli secs (100 needed per frame), pic no 470
missing -389 milli secs (100 needed per frame), pic no 471
missing -387 milli secs (100 needed per frame), pic no 472
missing -389 milli secs (100 needed per frame), pic no 473
missing -391 milli secs (100 needed per frame), pic no 474
missing -392 milli secs (100 needed per frame), pic no 475
missing -389 milli secs (100 needed per frame), pic no 476
missing -389 milli secs (100 needed per frame), pic no 477
missing -389 milli secs (100 needed per frame), pic no 478
missing -389 milli secs (100 needed per frame), pic no 479
missing -389 milli secs (100 needed per frame), pic no 480
missing -388 milli secs (100 needed per frame), pic no 481
missing -391 milli secs (100 needed per frame), pic no 482
missing -390 milli secs (100 needed per frame), pic no 483
missing -389 milli secs (100 needed per frame), pic no 484
missing -391 milli secs (100 needed per frame), pic no 485
missing -387 milli secs (100 needed per frame), pic no 486
missing -394 milli secs (100 needed per frame), pic no 487
missing -388 milli secs (100 needed per frame), pic no 488
missing -388 milli secs (100 needed per frame), pic no 489
missing -390 milli secs (100 needed per frame), pic no 490
missing -390 milli secs (100 needed per frame), pic no 491
missing -392 milli secs (100 needed per frame), pic no 492
missing -387 milli secs (100 needed per frame), pic no 493
missing -390 milli secs (100 needed per frame), pic no 494
missing -391 milli secs (100 needed per frame), pic no 495
missing -387 milli secs (100 needed per frame), pic no 496
missing -391 milli secs (100 needed per frame), pic no 497
missing -392 milli secs (100 needed per frame), pic no 498
missing -391 milli secs (100 needed per frame), pic no 499
missing -410 milli secs (100 needed per frame), pic no 500
missing -393 milli secs (100 needed per frame), pic no 501
missing -389 milli secs (100 needed per frame), pic no 502
missing -390 milli secs (100 needed per frame), pic no 503
missing -390 milli secs (100 needed per frame), pic no 504
missing -390 milli secs (100 needed per frame), pic no 505
missing -387 milli secs (100 needed per frame), pic no 506
missing -390 milli secs (100 needed per frame), pic no 507
missing -388 milli secs (100 needed per frame), pic no 508
missing -391 milli secs (100 needed per frame), pic no 509
missing -389 milli secs (100 needed per frame), pic no 510
missing -392 milli secs (100 needed per frame), pic no 511
missing -390 milli secs (100 needed per frame), pic no 512
missing -388 milli secs (100 needed per frame), pic no 513
missing -391 milli secs (100 needed per frame), pic no 514
missing -391 milli secs (100 needed per frame), pic no 515
missing -393 milli secs (100 needed per frame), pic no 516
missing -389 milli secs (100 needed per frame), pic no 517
missing -387 milli secs (100 needed per frame), pic no 518
missing -389 milli secs (100 needed per frame), pic no 519
missing -390 milli secs (100 needed per frame), pic no 520
missing -398 milli secs (100 needed per frame), pic no 521
missing -392 milli secs (100 needed per frame), pic no 522
missing -390 milli secs (100 needed per frame), pic no 523
missing -388 milli secs (100 needed per frame), pic no 524
missing -390 milli secs (100 needed per frame), pic no 525
missing -389 milli secs (100 needed per frame), pic no 526
missing -389 milli secs (100 needed per frame), pic no 527
missing -391 milli secs (100 needed per frame), pic no 528
missing -390 milli secs (100 needed per frame), pic no 529
missing -391 milli secs (100 needed per frame), pic no 530
missing -397 milli secs (100 needed per frame), pic no 531
missing -394 milli secs (100 needed per frame), pic no 532
missing -386 milli secs (100 needed per frame), pic no 533
missing -389 milli secs (100 needed per frame), pic no 534

willard@njordur:~/xvidcap-submit/error
> ldd /home/willard/bin/xvidcap
    linux-vdso.so.1 =>  (0x00007fff3fbfe000)
    libglade-2.0.so.0 => /usr/lib/libglade-2.0.so.0 (0x00007f57377ba000)
    libgtk-x11-2.0.so.0 => /usr/lib/libgtk-x11-2.0.so.0 (0x00007f57371eb000)
    libxml2.so.2 => /usr/lib/libxml2.so.2 (0x00007f5736ea4000)
    libgdk-x11-2.0.so.0 => /usr/lib/libgdk-x11-2.0.so.0 (0x00007f5736c0a000)
    libatk-1.0.so.0 => /usr/lib/libatk-1.0.so.0 (0x00007f57369ea000)
    libgdk_pixbuf-2.0.so.0 => /usr/lib/libgdk_pixbuf-2.0.so.0 (0x00007f57367d0000)
    libm.so.6 => /lib/libm.so.6 (0x00007f573654f000)
    libpangocairo-1.0.so.0 => /usr/lib/libpangocairo-1.0.so.0 (0x00007f5736344000)
    libpango-1.0.so.0 => /usr/lib/libpango-1.0.so.0 (0x00007f5736100000)
    libcairo.so.2 => /usr/lib/libcairo.so.2 (0x00007f5735e95000)
    libgobject-2.0.so.0 => /usr/lib/libgobject-2.0.so.0 (0x00007f5735c50000)
    libgmodule-2.0.so.0 => /usr/lib/libgmodule-2.0.so.0 (0x00007f5735a4d000)
    libdl.so.2 => /lib/libdl.so.2 (0x00007f5735849000)
    libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x00007f5735645000)
    librt.so.1 => /lib/librt.so.1 (0x00007f573543c000)
    libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x00007f573517c000)
    libXdamage.so.1 => /usr/lib/libXdamage.so.1 (0x00007f5734f7a000)
    libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0x00007f5734d75000)
    libXmu.so.6 => /usr/lib/libXmu.so.6 (0x00007f5734b5c000)
    libpthread.so.0 => /lib/libpthread.so.0 (0x00007f5734940000)
    libc.so.6 => /lib/libc.so.6 (0x00007f57345de000)
    libXext.so.6 => /usr/lib/libXext.so.6 (0x00007f57343cd000)
    libX11.so.6 => /usr/lib/libX11.so.6 (0x00007f57340ca000)
    libz.so.1 => /usr/lib/libz.so.1 (0x00007f5733eb3000)
    libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00007f5733c82000)
    libXrender.so.1 => /usr/lib/libXrender.so.1 (0x00007f5733a79000)
    libXinerama.so.1 => /usr/lib/libXinerama.so.1 (0x00007f5733877000)
    libXi.so.6 => /usr/lib/libXi.so.6 (0x00007f573366e000)
    libXrandr.so.2 => /usr/lib/libXrandr.so.2 (0x00007f5733467000)
    libXcursor.so.1 => /usr/lib/libXcursor.so.1 (0x00007f573325d000)
    libXcomposite.so.1 => /usr/lib/libXcomposite.so.1 (0x00007f573305b000)
    libpangoft2-1.0.so.0 => /usr/lib/libpangoft2-1.0.so.0 (0x00007f5732e2f000)
    libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00007f5732bb2000)
    libpng12.so.0 => /usr/lib/libpng12.so.0 (0x00007f573298d000)
    libpixman-1.so.0 => /usr/lib/libpixman-1.so.0 (0x00007f573275f000)
    libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f5732454000)
    libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f5732246000)
    libselinux.so.1 => /lib/libselinux.so.1 (0x00007f573202a000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f57379d4000)
    libpcre.so.3 => /usr/lib/libpcre.so.3 (0x00007f5731e04000)
    libXt.so.6 => /usr/lib/libXt.so.6 (0x00007f5731ba0000)
    libSM.so.6 => /usr/lib/libSM.so.6 (0x00007f5731998000)
    libICE.so.6 => /usr/lib/libICE.so.6 (0x00007f573177d000)
    libXau.so.6 => /usr/lib/libXau.so.6 (0x00007f573157b000)
    libxcb-xlib.so.0 => /usr/lib/libxcb-xlib.so.0 (0x00007f573137a000)
    libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00007f573115f000)
    libexpat.so.1 => /usr/lib/libexpat.so.1 (0x00007f5730f3b000)
    libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00007f5730d36000)

---

There is definitely something wrong. It seems that it "forgets" to encode chunks at regular intervals?

I do not know if this is a bug or just me not knowing how to use this software, so therefore, I am posting this here.

Do you (Karl), or anyone else, know what the problem is, and how I fix it?

Cheers,
Willard.

[Nobody/Anonymous]

Ah, by the way,

---

willard@njordur:~/xvidcap-submit/error
> uname -a
Linux njordur 2.6.24-19-generic #1 SMP Wed Aug 20 17:53:40 UTC 2008 x86_64 GNU/Linux

willard@njordur:~/xvidcap-submit/error
> cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Core(TM)2 Duo CPU     T7300  @ 2.00GHz
stepping        : 10
cpu MHz         : 800.000
cache size      : 4096 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm ida
bogomips        : 3995.11
clflush size    : 64
cache_alignment : 64
address sizes   : 36 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Core(TM)2 Duo CPU     T7300  @ 2.00GHz
stepping        : 10
cpu MHz         : 800.000
cache size      : 4096 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm ida
bogomips        : 3990.01
clflush size    : 64
cache_alignment    : 64
address sizes    : 36 bits physical, 48 bits virtual
power management:

---

I am doing this on an ASUS F8SA Notebook.

http://www.asus.com/products.aspx?l1=5&l2=26&l3=501&l4=0&model=1591&modelmenu=1

Cheers,
Willard.

[Nobody/Anonymous]

Hmm. Okay, I tried grabbing only a small portion of my screen, and then everything works fine.

---

willard@njordur:~/xvidcap-small
> /home/willard/bin/xvidcap -v --cap_geometry 200x200[0+0] --gui no --file error.avi > error.log
app_data.c xvc_appdata_set_defaults: Warning!!!
Your window manager appears to be non-compliant!

willard@njordur:~/xvidcap-small
> mplayer error.avi

[a small part of my screen, with correct playback speed, and synchronized sound]

willard@njordur:~/xvidcap-small
> cat error.log
Current settings:
flags = 1571
capture mode = multi-frame
position = 200x200+0+0
rescale output to = 100
frames per second = 10,00
file pattern = error.avi
file format = AUTO
video encoding = AUTO
audio codec = AUTO
verbose level = 1
frame start no = 0
frames to store = 0
time to capture = 0 sec
autocontinue = no
input source = shm (2)
capture pointer = white
capture audio = yes
- input = /dev/dsp
- sample rate = 44100
- bit rate = 64000
- channels = 2
animate command = mplayer "${XVFILE}" &
make video command= xterm -e "echo not needed for multi-frame capture; echo hit enter to dismiss; read"
edit frame command= xterm -e "echo none specified; echo hit enter to dismiss; read"

---

So, it seems I am making xvidcap grab more than my computer can handle. Which I find strange, because this machine is a beast.

Can you recommend any options to make my screencast more resource-efficient?

Cheers,
Willard.

[Karl H. Beckers]

Well,

1. do not use -v (when not debugging)
2. what window manager are you using?
  -  if you are not using a compositing window manager (compiz or the likes) try enabling XShm and XDamage from the preferences UI
3. try decreasing audio quality

HTH,

Karl.

[Nobody/Anonymous]

Thanks for the prompt reply.

1) Alrightey.

2) I am using xmonad. A tiling window manager. So, no fancy compiz-3d stuff. However, I have performed a bastard-fusion of gnome and xmonad, so I have a status bar, applets, auto-mounting, etc. etc. while still having a tiling wm. I hope that is not a problem. xmonad can be "mean", but only to windowed applications who misbehave (not X).

---

willard@njordur:~/xvidcap-tryxopts
> cat /home/willard/.gnomerc
export WINDOW_MANAGER=xmonad

---

Anyways, fiddling in the properties of the xvidcap gui yielded the following config file.

---

willard@njordur:~/xvidcap-tryxopts
> cat ../.xvidcaprc
#
# xvidcap configuration file

#general options ...
# default capture mode (0 = single-frame, 1 = multi-frame)
default_mode: 1
# capture source
source: shm
# take screenshots using the XDamage extension for efficiency.
# this does not work well for 3D compositing window managers like compiz or beryl.
# therefore xvidcap disables this by default for those window managers.
# set this to "-1" for auto-detection, "0" for disabled, or "1" for enabled.
use_xdamage: 1
# hide GUI
nogui: 0
# hide frame around capture area
noframe: 0
# device to grab audio from
audio_in: /dev/dsp
# what kind of mouse pointer should be recorded? 0 = none, 1 = white, 2 = black
mouse_wanted: 2
# should cap_geometry be saved to prefs?
save_geometry: 0
# locked frame follows mouse not window
follow_mouse: 0
# toggle autocontinue (0/1)
auto_continue: 0
# always show results dialog (0/1)
always_show_results: 1
# rescale the captured area to n percent of the original
rescale: 100
# minimize the main control to the system tray while recording
minimize_to_tray: 0

#options for single-frame capture ...
# file pattern
# this defines the filetype to write via the extension provided
# valid extensions are: .xwd .pgm .ppm .png .jpg .jpeg
sf_file: test-%04d.xwd
# file format - use AUTO to select format through file extension
# Otherwise specify one of the following: xwd, pgm, ppm, png, jpg
sf_format: NONE
# video codec used by ffmpeg - use AUTO to auto-detect codec
# Otherwise specify one of the following: PGM, PPM, PNG, JPEG
#sf_codec: NONE
# audio codec (for future use)
sf_au_codec: NONE
# frames per second
# put as normal decimal number or a fraction like "30000/10001"
sf_fps: 100/10
# max time (0 = unlimited)
sf_max_time: 0
# max frames (0 = unlimited)
sf_max_frames: 0
# number to start counting individual frames from
sf_start_no: 0
# quality (JPEG/MPEG)
sf_quality: 90
# toggle audio capture (0/1) (for future use)
sf_audio: 0
# sample rate for audio capture (for future use)
sf_audio_rate: 0
# bit rate for audio capture (for future use)
sf_audio_bits: 0
# number of channels to use in audio capture (for future use)
sf_audio_channels: 0
# command to display captured frames as animation
sf_animate_cmd: animate -delay "${XVTIME%,*}x1000" "${XVFILE}" &
# command to edit current frame
sf_edit_cmd: gimp "${XVFILE}" &
# command to encode captured frames
sf_video_cmd: ppm2mpeg.sh "${XVFILE}" ${XVFFRAME} ${XVLFRAME} ${XVWIDTH} ${XVHEIGHT} ${XVFPS} ${XVTIME} &

#options for multi-frame capture ...
# file pattern
# this defines the filetype to write via the extension provided
# valid extensions are: pgm ppm png jpg jpeg avi mpeg mpg asf flv flv1 swf dv m1v vcd m2v svcd vob dvd mov qt
mf_file: test-%04d.mpeg
# file format - use AUTO to select format through file extension
# Otherwise specify one of the following: pgm, ppm, png, jpg, avi, divx, asf, flv1, swf, dv, mpeg, mpeg2, vob, mov
mf_format: NONE
# video codec used by ffmpeg - use AUTO to auto-detect codec
# Otherwise specify one of the following: MPEG1, MJPEG, MPEG4, MS_DIV2, MS_DIV3, FFV1, FLASH_VIDEO, FLASH_SV, DV, MPEG2, SVQ1
mf_codec: NONE
# audio codec used by ffmpeg - use AUTO to auto-detect audio codec
# Otherwise specify one of the following: MP2, VORBIS, AC3, PCM16
mf_au_codec: NONE
# frames per second
# put as normal decimal number or a fraction like "30000/10001"
mf_fps: 100/10
# max time (0 = unlimited)
mf_max_time: 0
# max frames (0 = unlimited)
mf_max_frames: 0
# number to start counting individual frames from (for future use)
mf_start_no: 0
# quality (JPEG/MPEG)
mf_quality: 90
# toggle audio capture (0/1)
mf_audio: 1
# sample rate for audio capture
mf_audio_rate: 44100
# bit rate for audio capture
mf_audio_bits: 64000
# number of channels to use in audio capture
mf_audio_channels: 2
# command to display captured frames as animation
mf_animate_cmd: mplayer "${XVFILE}" &
# command to edit current movie
mf_edit_cmd: xterm -e "echo none specified; echo hit enter to dismiss; read"
# command to encode captured frames (subject to change)
mf_video_cmd: xterm -e "echo not needed for multi-frame capture; echo hit enter to dismiss; read"

---

I tried capturing a 1024x768 portion of my screen, and I got

---

willard@njordur:~/xvidcap-tryxopts
> /home/willard/bin/xvidcap --cap_geometry 1024x768+0+0 --gui no --file error.mpeg
app_data.c xvc_appdata_set_defaults: Warning!!!
Your window manager appears to be non-compliant!
[mpeg4 @ 0x80bd80]removing common factors from framerate
The program 'xvidcap' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 465 error_code 8 request_code 149 minor_code 4)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

---

The encoding went fine to begin with. I could move the mouse around, highlight text in a terminal, and speak, and the result of that is very good and synchronized. The Xdamage option really makes a difference, I see. However, as soon as I switched tag spaces or spawned a new window, I got the "X Window System error" displayed above.

3) I'll try that next as soon as I break through this wall :-P

Cheers,
Willard.

[Nobody/Anonymous]

By the way,

---

willard@njordur:~/xvidcap-test
> /home/willard/bin/xvidcap --gui yes
app_data.c xvc_appdata_set_defaults: Warning!!!
Your window manager appears to be non-compliant!

(xvidcap:12614): libglade-WARNING **: could not find glade file '/usr/local/share/xvidcap/glade/gnome-xvidcap.glade'
**
** ERROR:(gnome_ui.c:1714):xvc_ui_create: assertion failed: (xml)
Aborted

---

As I installed xvidcap to my homedir, I needed to manually place a symlink at /usr/local/share/xvidcap/glade/ to gnome-xvidcap.glade in my homedir (~/lib/xvidcap-1.1.7/src/gnome-xvidcap.glade) to make the gui appear.

[Nobody/Anonymous]

Huh.

I tried removing my .gnomerc such that I revert back to Ubuntu's default window manager (metacity). That did the trick! The 1440x900 recording does not crash (hasn't yet), is synchronized, even after it "misses out" on a few frames when I really put xvidcap to the (stress)test, and is very crisp.

Do, now that I can actually use xvidcap, my next logical question is: how come I cannot use any window manager, such as xmonad? How does xvidcap condition on the window manager being used? Do you know of a way to get xvidcap to work in xmonad, or am I barking up the wrong tree?

By the way, may I suggest an addition to your documentation? Since I refrain from using GUIs as much as possibe, I was unaware that there even was a config file for xvidcap. It does not say anywhere in the man page for xvidcap that xvidcap checks for a config file at ~/.xvidcaprc . Also, since I didn't touch the GUI until you told me to, I did not know there was an Xdamage option, and that it made this much difference.

Thanks for your suggestions so far.

Best regards,
Willard.

[Karl H. Beckers]

Willard,

believe me, I do wish the window manager were transparent to xvidcap operation. Unfortunately it is not. There are lots of differences in window managers' interpretations of how certain situations are to be treated. For example, if you use compiz and try to select a capture area and click down on a window title bar, then drag, xvidcap will crash, because it will get NULL color information, where metacity will provide the color info for the window the decoration belongs to. There are several such differences (this being one I haven't treated in code, yet) which is the reason why xvidcap tries to detect what kind of window manager is in use. That's why you were seeing "Your window manager appears to be non-compliant!" ... xvidcap didn't know what to do with your window manager. In such a situation, it will default to not use Xdamage (as with compiz). You can always manually override this setting. XDamage is a huge speed improvement because it means xivdcap does not need to fetch the complete capture area from the X server for each frame, only the area with changes.

Btw., you should not need the symlink if you use configure correctly, e. g.:
configure --prefix=/home/willard

Cheers,

Karl.