recording desktop with ffmpeg

tchino · 04-28-2011, 05:43 AM

bonjour
im using slackware 13.1 , and tried to record my desktop with recordmydesktop but the qualite was very bad, then i googled the subject little, and i found this commande with ffmpeg here is it:

ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y output.mkv

and i have this output

[11:41:14][khalid@novice ~]$ ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y output.mkv
FFmpeg version 0.6.1, Copyright (c) 2000-2010 the FFmpeg developers
built on Mar 23 2011 01:02:34 with gcc 4.4.4
configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --mandir=/usr/man --enable-libmp3lame --enable-libfaac --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-libdc1394 --enable-libfaad --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvpx --enable-libx264 --enable-runtime-cpudetect --enable-vaapi --disable-vdpau --enable-memalign-hack --enable-pthreads --enable-x11grab --enable-bzlib --enable-zlib --enable-shared --enable-static --disable-debug --extra-cflags='-I/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/include -DRUNTIME_CPUDETECT' --extra-ldflags='-L/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/lib -lssl -lcrypto -lz -lusb'
libavutil 50.15. 1 / 50.15. 1
libavcodec 52.73. 2 / 52.73. 2
libavformat 52.64. 2 / 52.64. 2
libavdevice 52. 2. 0 / 52. 2. 0
libavfilter 1.19. 0 / 1.19. 0
libswscale 0.11. 0 / 0.11. 0
libpostproc 51. 2. 0 / 51. 2. 0
[alsa @ 0x807a460]Estimating duration from bitrate, this may be inaccurate
Input #0, alsa, from 'hw:0,0':
Duration: N/A, start: 1211.999858, bitrate: N/A
Stream #0.0: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
[x11grab @ 0x8083e30]device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1280 height: 1024
[x11grab @ 0x8083e30]shared memory extension found
[x11grab @ 0x8083e30]Estimating duration from bitrate, this may be inaccurate
Input #1, x11grab, from ':0.0':
Duration: N/A, start: 1303990874.886658, bitrate: 1258291 kb/s
Stream #1.0: Video: rawvideo, bgra, 1280x1024, 1258291 kb/s, 30 tbr, 1000k tbn, 30 tbc
[libx264 @ 0x80907e0]using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
[libx264 @ 0x80907e0]profile High 4:4:4 Predictive, level 3.2, bit depth 8
[libx264 @ 0x80907e0]64 - core 113 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=0
Output #0, matroska, to 'output.mkv':
Metadata:
encoder : Lavf52.64.2
Stream #0.0: Video: libx264, yuv420p, 1280x1024, q=10-51, 200 kb/s, 1k tbn, 30 tbc
Stream #0.1: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
Stream mapping:
Stream #1.0 -> #0.0
Stream #0.0 -> #0.1
Press [q] to stop encoding
[alsa @ 0x807a460]ALSA buffer xrun.
[matroska @ 0x808f850]st:1 error, non monotone timestamps 1 >= 13.5kbits/s
av_interleaved_write_frame(): Operation not permitted

help me please

spiderbatdad · 04-28-2011, 05:01 PM

sorry not sure, and I haven't used ffmpeg for a few years. Of course there is a graphical front end called gtk-recordmydesktop. Don't know how it installs on slack. Assuming all the params are correct in your command..."operation not permitted" suggests a permissions problem. That is; try running as root. Or alter the command where you have:"$(xwininfo -root | grep 'geometry' |" to maybe "-user"

Telengard · 04-28-2011, 06:15 PM

I don't know why ffmpeg is failing, but I think the command can be simplified a bit. There is no need to pipe the output of grep into awk. Just drop the regular expression into the awk command.

Also the semicolon (;) is not needed after print $2. You only need it when you put multiple commands on the same line of the AWK program.

Code:

ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | awk '/geometry/ {print $2}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y output.mkv

Telengard · 04-28-2011, 06:30 PM

Quote:

Originally Posted by spiderbatdad

Or alter the command where you have:"$(xwininfo -root | grep 'geometry' |" to maybe "-user"

I note that the xwininfo command does not have a -user option.

http://linux.die.net/man/1/xwininfo

Quote:

Originally Posted by man xwininfo

-root
This option specifies that X's root window is the target window. This is useful in situations where the root window is completely obscured.

Don't get me wrong though. I'm not saying that running the command as root won't help. I just don't know yet.

Telengard · 04-28-2011, 06:46 PM

I can't get ffmpeg to work at all on my system. Even the examples in the man page fail. So I don't think there is any hope that I can help solve the problem. I hope at least the information I have already provided will prove useful to you.

Good luck.

spiderbatdad · 04-29-2011, 03:36 PM

I just ran the command:

Code:

ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | awk '/geometry/ {print $2}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y output.mkv

and it worked for me.

Code:

~$ ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | awk '/geometry/ {print $2}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y output.mkv
FFmpeg version 0.6-4:0.6-2ubuntu6, Copyright (c) 2000-2010 the FFmpeg developers
  built on Oct  5 2010 22:35:47 with gcc 4.4.5
  configuration: --extra-version=4:0.6-2ubuntu6 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
  WARNING: library configuration mismatch
  libavutil   configuration: --extra-version=4:0.6-2ubuntu3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavcodec  configuration: --extra-version=4:0.6-2ubuntu3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavformat configuration: --extra-version=4:0.6-2ubuntu3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavdevice configuration: --extra-version=4:0.6-2ubuntu3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavfilter configuration: --extra-version=4:0.6-2ubuntu6 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libswscale  configuration: --extra-version=4:0.6-2ubuntu6 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libpostproc configuration: --extra-version=4:0.6-2ubuntu3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libmp3lame --enable-gpl --enable-postproc --enable-x11grab --enable-libfaad --enable-libxvid --enable-libx264 --enable-librtmp --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
[alsa @ 0x8496be0]Estimating duration from bitrate, this may be inaccurate
Input #0, alsa, from 'hw:0,0':
  Duration: N/A, start: 488.000014, bitrate: N/A
    Stream #0.0: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
[x11grab @ 0x84a4400]device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1024 height: 600
[x11grab @ 0x84a4400]shared memory extension  found
[x11grab @ 0x84a4400]Estimating duration from bitrate, this may be inaccurate
Input #1, x11grab, from ':0.0':
  Duration: N/A, start: 1304108724.761774, bitrate: 589824 kb/s
    Stream #1.0: Video: rawvideo, bgra, 1024x600, 589824 kb/s, 30 tbr, 1000k tbn, 30 tbc
[libx264 @ 0x84b1bb0]using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowCTZ SlowAtom
[libx264 @ 0x84b1bb0]profile High 4:4:4 Predictive, level 3.1
[libx264 @ 0x84b1bb0]64 - core 98 Ubuntu_2:0.98.1653+git88b90d9-3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2010 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=0
Output #0, matroska, to 'output.mkv':
  Metadata:
    encoder         : Lavf52.64.2
    Stream #0.0: Video: libx264, yuv420p, 1024x600, q=10-51, 200 kb/s, 1k tbn, 30 tbc
    Stream #0.1: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
Stream mapping:
  Stream #1.0 -> #0.0
  Stream #0.0 -> #0.1
Press [q] to stop encoding
frame=  244 fps=  9 q=-1.0 Lsize=    5704kB time=27.31 bitrate=1711.1kbits/s    
video:996kB audio:4704kB global headers:0kB muxing overhead 0.062343%
[libx264 @ 0x84b1bb0]frame I:1     Avg QP: 0.00  size:309275
[libx264 @ 0x84b1bb0]frame P:243   Avg QP: 0.00  size:  2923
[libx264 @ 0x84b1bb0]mb I  I16..4: 45.4%  0.0% 54.6%
[libx264 @ 0x84b1bb0]mb P  I16..4: 26.7%  0.0%  0.0%  P16..4:  0.1%  0.0%  0.0%  0.0%  0.0%    skip:73.1%
[libx264 @ 0x84b1bb0]coded y,uvDC,uvAC intra: 1.4% 14.7% 14.7% inter: 0.1% 0.2% 0.2%
[libx264 @ 0x84b1bb0]i16 v,h,dc,p: 100%  0%  0%  0%
[libx264 @ 0x84b1bb0]i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 52% 31%  3%  2%  2%  2%  2%  2%  4%
[libx264 @ 0x84b1bb0]i8c dc,h,v,p: 87%  3% 10%  0%
[libx264 @ 0x84b1bb0]kb/s:294.48

It also works piping the output of grep to awk.
I notice my cli output lists a number of other dependencies and libraries not shown in the OP's. The error (non-monochrome timestamps) may be a bug. http://code.google.com/p/xuggle/issues/detail?id=51
Hopefully you can find info on non-monchrome timestamps...and maybe patch or get a newer version of ffmpeg.

Telengard · 04-29-2011, 03:41 PM

Quote:

Originally Posted by spiderbatdad

I just ran the command:

Code:

ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -r 30 -s $(xwininfo -root | awk '/geometry/ {print $2}') -i :0.0 -acodec pcm_s16le -vcodec libx264 -vpre lossless_ultrafast -threads 0 -y output.mkv

and it worked perfectly for me.

Good to know

I'm just a bit perturbed that even the simple examples from the man page fail for me. Not really interested in troubleshooting it though, because this system is going to be upgraded soon anyway.