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  • Why ffmpeg convert only the first frame of gif to mp4 [closed]

    3 juin 2020, par Jayvant

    Gif has 6 frames with 2 sec delay per each.
I used following command :

    



    ffmpeg -i input.gif -y -an anim123.mp4 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"


    



    output log :

    



        ffmpeg version N-85266-g1229007 Copyright (c) 2000-2017 the FFmpeg developers
      built with gcc 6.3.0 (GCC)
      configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib                                                                                            libavutil      55. 59.100 / 55. 59.100                                                                                  libavcodec     57. 90.100 / 57. 90.100                                                                                  libavformat    57. 72.100 / 57. 72.100                                                                                  libavdevice    57.  7.100 / 57.  7.100                                                                                  libavfilter     6. 83.100 /  6. 83.100
      libswscale      4.  7.100 /  4.  7.100
      libswresample   2.  8.100 /  2.  8.100
      libpostproc    54.  6.100 / 54.  6.100
Trailing options were found on the commandline.
Input #0, gif, from 'input.gif':
Duration: N/A, bitrate: N/A                                                                                               
    Stream #0:0: Video: gif, bgra, 560x315, 0.50 fps, 0.50 tbr, 100 tbn, 100 tbc
Stream mapping:                                                                                                           
    Stream #0:0 -> #0:0 (gif (native) -> h264 (libx264))
Press [q] to stop, [?] for help                                                                                         
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.                                                     
[libx264 @ 0000000000681a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX                                     
[libx264 @ 0000000000681a00] profile High 4:4:4 Predictive, level 2.1, 4:4:4 8-bit                                      
[libx264 @ 0000000000681a00] 264 - core 148 r2762 90a61ec - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'anim123.mp4':                                                                                         
Metadata:                                                                                                                 
    encoder         : Lavf57.72.100                                                                                         
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 560x315, q=-1--1, 0.50 fps, 16384 tbn, 0.50 tbc                                                                                                                           
    Metadata:                                                                                                                 
    encoder         : Lavc57.90.100 libx264                                                                               
    Side data:                                                                                                                
    cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1 
frame=    6 fps=0.0 q=-1.0 Lsize=     338kB time=00:00:06.00 bitrate= 461.9kbits/s speed=22.9x                         
 video:337kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.251471%
[libx264 @ 0000000000681a00] frame I:1     Avg QP:14.97  size: 51472                                                    
[libx264 @ 0000000000681a00] frame P:5     Avg QP:17.08  size: 58681
[libx264 @ 0000000000681a00] mb I  I16..4: 27.9% 23.6% 48.6%                                                            
[libx264 @ 0000000000681a00] mb P  I16..4: 15.0% 17.3% 48.2%  P16..4:  1.5%  0.1%  0.1%  0.0%  0.0%    skip:17.8%       
[libx264 @ 0000000000681a00] 8x8 transform intra:21.9% inter:9.4%                                                       
[libx264 @ 0000000000681a00] coded y,u,v intra: 63.8% 59.7% 55.8% inter: 2.2% 1.0% 0.6%                                 
[libx264 @ 0000000000681a00] i16 v,h,dc,p: 77% 10% 12%  0%                                                              
[libx264 @ 0000000000681a00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 15% 34%  4%  4%  4%  7%  3% 10%                         
[libx264 @ 0000000000681a00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  9% 22% 17%  6%  7%  5% 13%  5% 14%                         
[libx264 @ 0000000000681a00] Weighted P-Frames: Y:40.0% UV:20.0%
[libx264 @ 0000000000681a00] ref P L0: 40.8%  0.8% 44.6%  8.8%  5.0%
[libx264 @ 0000000000681a00] kb/s:229.92


    



    Input Gif Link


    
Video not generating properly, It takes only 1st frame in video.

    


  • FFmpeg AVI to MP4 preserves sound, but not images [migrated]

    21 février 2013, par user1711384

    Working with FFmpeg at a conversion (any file to MP4 (H.264/AAC)) :

    ffmpeg -y -i testdatei.avi -i logo.jpg -filter_complex overlay=15:15,scale=-1:720 -c:v libx264 -profile:v baseline -preset medium -b:v 880k -g 10 -pass 1 -an -f mp4 -movflags faststart /dev/null
    ffmpeg -y -i testdatei.avi -i logo.jpg -filter_complex overlay=15:15,scale=-1:720 -c:v libx264 -profile:v baseline -preset medium -b:v 880k -g 10 -pass 2 -c:a libfdk_aac -b:a 128k -movflags faststart xxx.mp4 2>&1

    With MPEG and WMV file it's working. With two different AVIs it didn't work. Logfiles from path 1 aren't generated and output 1 is empty, output 2 of course generates an error.

    After removing -profile:v baseline in both commands, the video file is successfully generated, but it's not possible to play it in JW Player (sound yes, but no image).

    This is the result of the first command :

    ffmpeg version git-2013-02-20-39b0393 Copyright (c) 2000-2013 the FFmpeg developers
     built on Feb 20 2013 12:06:36 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
     configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
     libavutil      52. 17.102 / 52. 17.102
     libavcodec     54. 92.100 / 54. 92.100
     libavformat    54. 63.100 / 54. 63.100
     libavdevice    54.  3.103 / 54.  3.103
     libavfilter     3. 38.103 /  3. 38.103
     libswscale      2.  2.100 /  2.  2.100
     libswresample   0. 17.102 /  0. 17.102
     libpostproc    52.  2.100 / 52.  2.100
    [avi @ 0x23e4d80] non-interleaved AVI
    Guessed Channel Layout for  Input Stream #0.1 : stereo
    Input #0, avi, from 'testdatei.avi':
     Metadata:
       date            : 2013-02-21T14:06:32+01:00
       encoder         : Adobe Premiere Pro CS6 (Windows)
     Duration: 00:00:07.57, start: 0.000000, bitrate: 30330 kb/s
       Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv411p, 720x480 [SAR 8:9 DAR 4:3], 29.97 tbr, 29.97 tbn, 29.97 tbc
       Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
    Input #1, image2, from 'logo.jpg':
     Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
       Stream #1:0: Video: mjpeg, yuvj444p, 170x82, 25 tbr, 25 tbn, 25 tbc
    [libx264 @ 0x23e9640] using SAR=8/9
    [libx264 @ 0x23e9640] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
    [libx264 @ 0x23e9640] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
    [libx264 @ 0x23e9640] 264 - core 129 r2 bc13772 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=10 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=2pass mbtree=1 bitrate=880 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 cplxblur=20.0 qblur=0.5 ip_ratio=1.40 aq=1:1.00
    Output #0, mp4, to 'xxx.mp4':
     Metadata:
       date            : 2013-02-21T14:06:32+01:00
       encoder         : Lavf54.63.100
       Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv444p, 1080x720 [SAR 8:9 DAR 4:3], q=-1--1, pass 2, 880 kb/s, 11988 tbn, 29.97 tbc
       Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    Stream mapping:
     Stream #0:0 (dvvideo) -> overlay:main (graph 0)
     Stream #1:0 (mjpeg) -> overlay:overlay (graph 0)
     scale (graph 0) -> Stream #0:0 (libx264)
     Stream #0:1 -> #0:1 (pcm_s16le -> libfdk_aac)
    Press [q] to stop, [?] for help
    frame=   79 fps=0.0 q=30.0 size=     291kB time=00:00:02.58 bitrate= 922.4kbits/s  
    frame=  162 fps=162 q=30.0 size=     620kB time=00:00:05.33 bitrate= 952.9kbits/s    
    Starting second pass: moving header on top of the file"
    frame=  227 fps=154 q=32766.0 Lsize=     958kB time=00:00:07.59 bitrate=1033.5kbits/s
    video:829kB audio:120kB subtitle:0 global headers:0kB muxing overhead 0.986027%
    [libx264 @ 0x23e9640] frame I:23    Avg QP:19.11  size: 31383
    [libx264 @ 0x23e9640] frame P:68    Avg QP:23.91  size:  1240
    [libx264 @ 0x23e9640] frame B:136   Avg QP:20.27  size:   310
    [libx264 @ 0x23e9640] consecutive B-frames: 19.8%  0.9%  0.0% 79.3%
    [libx264 @ 0x23e9640] mb I  I16..4: 18.8% 68.4% 12.8%
    [libx264 @ 0x23e9640] mb P  I16..4:  0.3%  0.3%  0.0%  P16..4: 10.7%  2.3%  0.8%  0.0%  0.0%    skip:85.6%
    [libx264 @ 0x23e9640] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  9.1%  0.1%  0.0%  direct: 0.1%  skip:90.7%  L0:41.2% L1:58.6% BI: 0.2%
    [libx264 @ 0x23e9640] 8x8 transform intra:68.3% inter:97.5%
    [libx264 @ 0x23e9640] coded y,u,v intra: 53.7% 26.9% 30.8% inter: 0.5% 0.2% 0.3%
    [libx264 @ 0x23e9640] i16 v,h,dc,p: 70% 17%  1% 11%
    [libx264 @ 0x23e9640] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 25% 18%  4%  3%  4%  4%  6%  8%
    [libx264 @ 0x23e9640] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 29%  8%  4%  6%  6%  5%  5%  4%
    [libx264 @ 0x23e9640] Weighted P-Frames: Y:0.0% UV:0.0%
    [libx264 @ 0x23e9640] ref P L0: 75.9%  5.1% 11.3%  7.7%
    [libx264 @ 0x23e9640] ref B L0: 96.0%  3.1%  0.9%
    [libx264 @ 0x23e9640] ref B L1: 95.8%  4.2%
    [libx264 @ 0x23e9640] kb/s:895.99

    Output2 :

    ffmpeg version git-2013-02-20-39b0393 Copyright (c) 2000-2013 the FFmpeg developers
     built on Feb 20 2013 12:06:36 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
     configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
     libavutil      52. 17.102 / 52. 17.102
     libavcodec     54. 92.100 / 54. 92.100
     libavformat    54. 63.100 / 54. 63.100
     libavdevice    54.  3.103 / 54.  3.103
     libavfilter     3. 38.103 /  3. 38.103
     libswscale      2.  2.100 /  2.  2.100
     libswresample   0. 17.102 /  0. 17.102
     libpostproc    52.  2.100 / 52.  2.100
    [avi @ 0x23e4d80] non-interleaved AVI
    Guessed Channel Layout for  Input Stream #0.1 : stereo
    Input #0, avi, from 'testdatei.avi':
     Metadata:
       date            : 2013-02-21T14:06:32+01:00
       encoder         : Adobe Premiere Pro CS6 (Windows)
     Duration: 00:00:07.57, start: 0.000000, bitrate: 30330 kb/s
       Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv411p, 720x480 [SAR 8:9 DAR 4:3], 29.97 tbr, 29.97 tbn, 29.97 tbc
       Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
    Input #1, image2, from 'logo.jpg':
     Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
       Stream #1:0: Video: mjpeg, yuvj444p, 170x82, 25 tbr, 25 tbn, 25 tbc
    [libx264 @ 0x23e9640] using SAR=8/9
    [libx264 @ 0x23e9640] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
    [libx264 @ 0x23e9640] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
    [libx264 @ 0x23e9640] 264 - core 129 r2 bc13772 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=10 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=2pass mbtree=1 bitrate=880 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 cplxblur=20.0 qblur=0.5 ip_ratio=1.40 aq=1:1.00
    Output #0, mp4, to 'xxx.mp4':
     Metadata:
       date            : 2013-02-21T14:06:32+01:00
       encoder         : Lavf54.63.100
       Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv444p, 1080x720 [SAR 8:9 DAR 4:3], q=-1--1, pass 2, 880 kb/s, 11988 tbn, 29.97 tbc
       Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    Stream mapping:
     Stream #0:0 (dvvideo) -> overlay:main (graph 0)
     Stream #1:0 (mjpeg) -> overlay:overlay (graph 0)
     scale (graph 0) -> Stream #0:0 (libx264)
     Stream #0:1 -> #0:1 (pcm_s16le -> libfdk_aac)
    Press [q] to stop, [?] for help
    frame=   79 fps=0.0 q=30.0 size=     291kB time=00:00:02.58 bitrate= 922.4kbits/s  
    frame=  162 fps=162 q=30.0 size=     620kB time=00:00:05.33 bitrate= 952.9kbits/s    
    Starting second pass: moving header on top of the file"
    frame=  227 fps=154 q=32766.0 Lsize=     958kB time=00:00:07.59 bitrate=1033.5kbits/s
    video:829kB audio:120kB subtitle:0 global headers:0kB muxing overhead 0.986027%
    [libx264 @ 0x23e9640] frame I:23    Avg QP:19.11  size: 31383
    [libx264 @ 0x23e9640] frame P:68    Avg QP:23.91  size:  1240
    [libx264 @ 0x23e9640] frame B:136   Avg QP:20.27  size:   310
    [libx264 @ 0x23e9640] consecutive B-frames: 19.8%  0.9%  0.0% 79.3%
    [libx264 @ 0x23e9640] mb I  I16..4: 18.8% 68.4% 12.8%
    [libx264 @ 0x23e9640] mb P  I16..4:  0.3%  0.3%  0.0%  P16..4: 10.7%  2.3%  0.8%  0.0%  0.[0%    skip:85.6%
    [libx264 @ 0x23e9640] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  9.1%  0.1%  0.0%  direct: 0.1%  skip:90.7%  L0:41.2% L1:58.6% BI: 0.2%
    [libx264 @ 0x23e9640] 8x8 transform intra:68.3% inter:97.5%
    [libx264 @ 0x23e9640] coded y,u,v intra: 53.7% 26.9% 30.8% inter: 0.5% 0.2% 0.3%
    [libx264 @ 0x23e9640] i16 v,h,dc,p: 70% 17%  1% 11%
    [libx264 @ 0x23e9640] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 25% 18%  4%  3%  4%  4%  6%  8%
    [libx264 @ 0x23e9640] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 29%  8%  4%  6%  6%  5%  5%  4%
    [libx264 @ 0x23e9640] Weighted P-Frames: Y:0.0% UV:0.0%
    [libx264 @ 0x23e9640] ref P L0: 75.9%  5.1% 11.3%  7.7%
    [libx264 @ 0x23e9640] ref B L0: 96.0%  3.1%  0.9%
    [libx264 @ 0x23e9640] ref B L1: 95.8%  4.2%
    [libx264 @ 0x23e9640] kb/s:895.99

    Do you have a idea why AVI makes problems ? What could be the solution ?

  • No sound when capture screen

    10 janvier 2018, par scrapy

    To capture my pc screen with following ffmpeg command.

    ffmpeg -f pulse -ac 2 -i default -f x11grab -r 30 -s 1920x1080 -i :0.0 -acodec pcm_s16le -vcodec libx264 -preset ultrafast -threads 0 -y /tmp/output.mkv

    The output displayed on my console when to execute the above command.

    Guessed Channel Layout for Input Stream #0.0 : stereo
    Input #0, pulse, from 'default':
     Duration: N/A, start: 1515543051.106987, bitrate: 1536 kb/s
       Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    [x11grab @ 0x564bda5b8520] Stream #0: not enough frames to estimate rate; consider increasing probesize
    Input #1, x11grab, from ':0.0':
     Duration: N/A, start: 1515543052.415508, bitrate: N/A
       Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 30 fps, 1000k tbr, 1000k tbn, 1000k tbc
    No pixel format specified, yuv444p for H.264 encoding chosen.
    Use -pix_fmt yuv420p for compatibility with outdated media players.
    [libx264 @ 0x564bda5c1560] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 LZCNT
    [libx264 @ 0x564bda5c1560] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
    [libx264 @ 0x564bda5c1560] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
    Output #0, matroska, to '/tmp/output.mkv':
     Metadata:
       encoder         : Lavf57.56.101
       Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p, 1920x1080, q=-1--1, 30 fps, 1k tbn, 30 tbc
       Metadata:
         encoder         : Lavc57.64.101 libx264
       Side data:
         cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
       Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
       Metadata:
         encoder         : Lavc57.64.101 pcm_s16le
    Stream mapping:
     Stream #1:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
     Stream #0:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))

    Playing a music when to make the screenshot,i can hear the music playing lound.
    It’s strange that vedio came out perfectly without sound when to play the captured /tmp/output.mkv.

    Open my volume control with pavucontrol.

    Nothing in recording window, maybe the blank recording window result in no souond when to capture screen !
    How to fix it ?

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