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  • Les statuts des instances de mutualisation

    13 mars 2010, par

    Pour des raisons de compatibilité générale du plugin de gestion de mutualisations avec les fonctions originales de SPIP, les statuts des instances sont les mêmes que pour tout autre objets (articles...), seuls leurs noms dans l’interface change quelque peu.
    Les différents statuts possibles sont : prepa (demandé) qui correspond à une instance demandée par un utilisateur. Si le site a déjà été créé par le passé, il est passé en mode désactivé. publie (validé) qui correspond à une instance validée par un (...)

  • Problèmes fréquents

    10 mars 2010, par

    PHP et safe_mode activé
    Une des principales sources de problèmes relève de la configuration de PHP et notamment de l’activation du safe_mode
    La solution consiterait à soit désactiver le safe_mode soit placer le script dans un répertoire accessible par apache pour le site

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (9863)

  • FFMPEG sepia filter

    28 juin 2018, par Alex Konetchy

    Can’t seem to figure out why my colorchannelmixer filter is not working with ffmpeg. It doesn’t appear to output any errors, but the ouput.mp4 video is just a 0 second long video with no thumbnail.

    Here’s the command I’m trying.

    ffmpeg -i video.mp4 -filter_complex \
    "[0:v] colorchannelmixer=.393:.769:.189:0:.349:.686:.168:0:.272:.534:.131[f1];\
    [f1] eq=1.0:0:1.3:2.4:1.0:1.0:1.0:1.0 [outv]" -map "[outv]" output.mp4

    And the output I receive.

    ffmpeg version 2.8.4 Copyright (c) 2000-2015 the FFmpeg developers
         built with gcc 5.2.0 (GCC)
         configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
         libavutil      54. 31.100 / 54. 31.100
         libavcodec     56. 60.100 / 56. 60.100
         libavformat    56. 40.101 / 56. 40.101
         libavdevice    56.  4.100 / 56.  4.100
         libavfilter     5. 40.101 /  5. 40.101
         libswscale      3.  1.101 /  3.  1.101
         libswresample   1.  2.101 /  1.  2.101
         libpostproc    53.  3.100 / 53.  3.100
       Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
         Metadata:
           major_brand     : mp42
           minor_version   : 1
           compatible_brands: mp41mp42isom
           creation_time   : 2017-04-18 20:22:52
         Duration: 00:00:59.20, start: 0.000000, bitrate: 5045 kb/s
           Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb/s (default)
           Metadata:
             creation_time   : 2017-04-18 20:22:52
             handler_name    : Core Media Audio
           Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 5038 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
           Metadata:
             creation_time   : 2017-04-18 20:22:52
             handler_name    : Core Media Video
       File 'output.mp4' already exists. Overwrite ? [y/N] y
       No pixel format specified, yuv444p for H.264 encoding chosen.
       Use -pix_fmt yuv420p for compatibility with outdated media players.
       [libx264 @ 04f1b8e0] using SAR=1/1
       [libx264 @ 04f1b8e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
       [libx264 @ 04f1b8e0] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
       [libx264 @ 04f1b8e0] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=25 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 'output.mp4':
         Metadata:
           major_brand     : mp42
           minor_version   : 1
           compatible_brands: mp41mp42isom
           encoder         : Lavf56.40.101
           Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
           Metadata:
             encoder         : Lavc56.60.100 libx264
       Stream mapping:
         Stream #0:1 (h264) -> colorchannelmixer
         eq -> Stream #0:0 (libx264)
       Press [q] to stop, [?] for help
       frame=   50 fps=4.7 q=-1.0 Lsize=     281kB time=00:00:01.92 bitrate=1197.3kbits/s
       video:279kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.502929%
       [libx264 @ 04f1b8e0] frame I:1     Avg QP:19.00  size: 51169
       [libx264 @ 04f1b8e0] frame P:13    Avg QP:20.60  size: 10882
       [libx264 @ 04f1b8e0] frame B:36    Avg QP:23.29  size:  2572
       [libx264 @ 04f1b8e0] consecutive B-frames:  2.0%  4.0%  6.0% 88.0%
       [libx264 @ 04f1b8e0] mb I  I16..4: 25.5% 63.4% 11.1%
       [libx264 @ 04f1b8e0] mb P  I16..4:  2.7%  2.8%  0.2%  P16..4: 22.7%  5.4%  2.7%  0.0%  0.0%    skip:63.5%
       [libx264 @ 04f1b8e0] mb B  I16..4:  0.3%  0.5%  0.0%  B16..8: 17.2%  0.7%  0.0%  direct: 0.1%  skip:81.1%  L0:43.6% L1:55.1% BI: 1.4%
       [libx264 @ 04f1b8e0] 8x8 transform intra:58.3% inter:91.1%
       [libx264 @ 04f1b8e0] coded y,u,v intra: 25.2% 10.1% 12.0% inter: 2.7% 0.5% 0.6%
       [libx264 @ 04f1b8e0] i16 v,h,dc,p: 44% 36% 13%  8%
       [libx264 @ 04f1b8e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 20% 42%  3%  2%  2%  4%  3%  3%
       [libx264 @ 04f1b8e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 26% 12%  4%  6%  6%  9%  5%  3%
       [libx264 @ 04f1b8e0] Weighted P-Frames: Y:0.0% UV:0.0%
       [libx264 @ 04f1b8e0] ref P L0: 61.3%  6.1% 22.1% 10.5%
       [libx264 @ 04f1b8e0] ref B L0: 78.5% 16.8%  4.6%
       [libx264 @ 04f1b8e0] ref B L1: 94.9%  5.1%
       [libx264 @ 04f1b8e0] kb/s:1140.95
  • FFMPEG sepia filter

    24 avril 2017, par Alex Konetchy

    Can’t seem to figure out why my colorchannelmixer filter is not working with ffmpeg. It doesn’t appear to output any errors, but the ouput.mp4 video is just a 0 second long video with no thumbnail.

    Here’s the command I’m trying.

    ffmpeg -i video.mp4 -filter_complex \
    "[0:v] colorchannelmixer=.393:.769:.189:0:.349:.686:.168:0:.272:.534:.131[f1];\
    [f1] eq=1.0:0:1.3:2.4:1.0:1.0:1.0:1.0 [outv]" -map "[outv]" output.mp4

    And the output I receive.

    ffmpeg version 2.8.4 Copyright (c) 2000-2015 the FFmpeg developers
         built with gcc 5.2.0 (GCC)
         configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
         libavutil      54. 31.100 / 54. 31.100
         libavcodec     56. 60.100 / 56. 60.100
         libavformat    56. 40.101 / 56. 40.101
         libavdevice    56.  4.100 / 56.  4.100
         libavfilter     5. 40.101 /  5. 40.101
         libswscale      3.  1.101 /  3.  1.101
         libswresample   1.  2.101 /  1.  2.101
         libpostproc    53.  3.100 / 53.  3.100
       Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
         Metadata:
           major_brand     : mp42
           minor_version   : 1
           compatible_brands: mp41mp42isom
           creation_time   : 2017-04-18 20:22:52
         Duration: 00:00:59.20, start: 0.000000, bitrate: 5045 kb/s
           Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb/s (default)
           Metadata:
             creation_time   : 2017-04-18 20:22:52
             handler_name    : Core Media Audio
           Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 5038 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
           Metadata:
             creation_time   : 2017-04-18 20:22:52
             handler_name    : Core Media Video
       File 'output.mp4' already exists. Overwrite ? [y/N] y
       No pixel format specified, yuv444p for H.264 encoding chosen.
       Use -pix_fmt yuv420p for compatibility with outdated media players.
       [libx264 @ 04f1b8e0] using SAR=1/1
       [libx264 @ 04f1b8e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
       [libx264 @ 04f1b8e0] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
       [libx264 @ 04f1b8e0] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=25 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 'output.mp4':
         Metadata:
           major_brand     : mp42
           minor_version   : 1
           compatible_brands: mp41mp42isom
           encoder         : Lavf56.40.101
           Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
           Metadata:
             encoder         : Lavc56.60.100 libx264
       Stream mapping:
         Stream #0:1 (h264) -> colorchannelmixer
         eq -> Stream #0:0 (libx264)
       Press [q] to stop, [?] for help
       frame=   50 fps=4.7 q=-1.0 Lsize=     281kB time=00:00:01.92 bitrate=1197.3kbits/s
       video:279kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.502929%
       [libx264 @ 04f1b8e0] frame I:1     Avg QP:19.00  size: 51169
       [libx264 @ 04f1b8e0] frame P:13    Avg QP:20.60  size: 10882
       [libx264 @ 04f1b8e0] frame B:36    Avg QP:23.29  size:  2572
       [libx264 @ 04f1b8e0] consecutive B-frames:  2.0%  4.0%  6.0% 88.0%
       [libx264 @ 04f1b8e0] mb I  I16..4: 25.5% 63.4% 11.1%
       [libx264 @ 04f1b8e0] mb P  I16..4:  2.7%  2.8%  0.2%  P16..4: 22.7%  5.4%  2.7%  0.0%  0.0%    skip:63.5%
       [libx264 @ 04f1b8e0] mb B  I16..4:  0.3%  0.5%  0.0%  B16..8: 17.2%  0.7%  0.0%  direct: 0.1%  skip:81.1%  L0:43.6% L1:55.1% BI: 1.4%
       [libx264 @ 04f1b8e0] 8x8 transform intra:58.3% inter:91.1%
       [libx264 @ 04f1b8e0] coded y,u,v intra: 25.2% 10.1% 12.0% inter: 2.7% 0.5% 0.6%
       [libx264 @ 04f1b8e0] i16 v,h,dc,p: 44% 36% 13%  8%
       [libx264 @ 04f1b8e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 20% 42%  3%  2%  2%  4%  3%  3%
       [libx264 @ 04f1b8e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 26% 12%  4%  6%  6%  9%  5%  3%
       [libx264 @ 04f1b8e0] Weighted P-Frames: Y:0.0% UV:0.0%
       [libx264 @ 04f1b8e0] ref P L0: 61.3%  6.1% 22.1% 10.5%
       [libx264 @ 04f1b8e0] ref B L0: 78.5% 16.8%  4.6%
       [libx264 @ 04f1b8e0] ref B L1: 94.9%  5.1%
       [libx264 @ 04f1b8e0] kb/s:1140.95
  • Video becomes choppy when the order in the hstack filter is changed

    25 octobre 2018, par Mayank

    I have a FFmpeg command wherein I am merging 2 videos side by side using hstack filter. When I place first video on the right hand side and second video on the left hand side, the final merged video is perfect in quality and plays smoothly.

    However, when I swap the order in hstack filter, the final video is very choppy.

    Can someone please let me know the issue in this command ? Many thanks in advance.

    Also, the file size of the non working file is almost double than that of working file. Can you explain why ?

    Here is the working command :

    ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [3_v_silence][2:v]hstack" -preset ultrafast -y n_m_bars_try2.mp4

    output :

    ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
     built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
     configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
     libavutil      56. 14.100 / 56. 14.100
     libavcodec     58. 18.100 / 58. 18.100
     libavformat    58. 12.100 / 58. 12.100
     libavdevice    58.  3.100 / 58.  3.100
     libavfilter     7. 16.100 /  7. 16.100
     libswscale      5.  1.100 /  5.  1.100
     libswresample   3.  1.100 /  3.  1.100
     libpostproc    55.  1.100 / 55.  1.100
    Input #0, ogg, from '1_a.opus':
     Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s
       Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
    Input #1, ogg, from '2_a.opus':
     Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s
       Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp
    Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf58.12.100
     Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s
       Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)
       Metadata:
         handler_name    : VideoHandler
    Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf58.12.100
     Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s
       Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
       Metadata:
         handler_name    : VideoHandler
    Stream mapping:
     Stream #0:0 (opus) -> amix:input0
     Stream #1:0 (opus) -> adelay
     Stream #2:0 (h264) -> hstack:input1
     Stream #3:0 (h264) -> trim
     Stream #3:0 (h264) -> fifo
     amix -> Stream #0:0 (aac)
     hstack -> Stream #0:1 (libx264)
    Press [q] to stop, [?] for help
    [libx264 @ 0x528d600] using SAR=1/1
    [libx264 @ 0x528d600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
    [libx264 @ 0x528d600] profile Constrained Baseline, level 3.1
    [libx264 @ 0x528d600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 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, mp4, to 'navid_mayank_bars_try2.mp4':
     Metadata:
       encoder         : Lavf58.12.100
       Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
       Metadata:
         encoder         : Lavc58.18.100 aac
       Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
       Metadata:
         encoder         : Lavc58.18.100 libx264
       Side data:
         cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    frame= 1704 fps= 42 q=-1.0 Lsize=   14440kB time=00:01:08.12 bitrate=1736.5kbits/s dup=3 drop=21229 speed=1.69x    
    video:13448kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.269503%
    [aac @ 0x52b8680] Qavg: 22255.799
    [libx264 @ 0x528d600] frame I:7     Avg QP:16.29  size: 46284
    [libx264 @ 0x528d600] frame P:1697  Avg QP:18.36  size:  7924
    [libx264 @ 0x528d600] mb I  I16..4: 100.0%  0.0%  0.0%
    [libx264 @ 0x528d600] mb P  I16..4:  1.8%  0.0%  0.0%  P16..4: 31.0%  0.0%  0.0%  0.0%  0.0%    skip:67.2%
    [libx264 @ 0x528d600] coded y,uvDC,uvAC intra: 29.9% 59.3% 17.5% inter: 13.4% 24.6% 0.8%
    [libx264 @ 0x528d600] i16 v,h,dc,p: 36% 29% 18% 17%
    [libx264 @ 0x528d600] i8c dc,h,v,p: 42% 25% 21% 11%
    [libx264 @ 0x528d600] kb/s:1616.23

    Non working command :

    ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [2:v][3_v_silence]hstack" -preset ultrafast -y m_n_bars_try2.mp4

    output :

    ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
     built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
     configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
     libavutil      56. 14.100 / 56. 14.100
     libavcodec     58. 18.100 / 58. 18.100
     libavformat    58. 12.100 / 58. 12.100
     libavdevice    58.  3.100 / 58.  3.100
     libavfilter     7. 16.100 /  7. 16.100
     libswscale      5.  1.100 /  5.  1.100
     libswresample   3.  1.100 /  3.  1.100
     libpostproc    55.  1.100 / 55.  1.100
    Input #0, ogg, from '1_a.opus':
     Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s
       Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
    Input #1, ogg, from '2_a.opus':
     Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s
       Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp
    Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf58.12.100
     Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s
       Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)
       Metadata:
         handler_name    : VideoHandler
    Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf58.12.100
     Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s
       Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
       Metadata:
         handler_name    : VideoHandler
    Stream mapping:
     Stream #0:0 (opus) -> amix:input0
     Stream #1:0 (opus) -> adelay
     Stream #2:0 (h264) -> hstack:input0
     Stream #3:0 (h264) -> trim
     Stream #3:0 (h264) -> fifo
     amix -> Stream #0:0 (aac)
     hstack -> Stream #0:1 (libx264)
    Press [q] to stop, [?] for help
    [libx264 @ 0x6d21600] using SAR=1/1
    [libx264 @ 0x6d21600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle
    [libx264 @ 0x6d21600] profile Constrained Baseline, level 5.1
    [libx264 @ 0x6d21600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 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, mp4, to 'mayank_navid_bars_try2.mp4':
     Metadata:
       encoder         : Lavf58.12.100
       Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
       Metadata:
         encoder         : Lavc58.18.100 aac
       Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 333 fps, 10656 tbn, 333 tbc (default)
       Metadata:
         encoder         : Lavc58.18.100 libx264
       Side data:
         cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Past duration 0.999992 too large
       Last message repeated 12 times
    More than 1000 frames duplicated   33280kB time=00:01:08.03 bitrate=4007.4kbits/s dup=982 drop=1590 speed=0.536x    
    frame=22679 fps=177 q=-1.0 Lsize=   33892kB time=00:01:08.10 bitrate=4076.9kbits/s dup=1339 drop=1590 speed=0.531x    
    video:32804kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.401324%
    [aac @ 0x6d4c680] Qavg: 22255.799
    [libx264 @ 0x6d21600] frame I:91    Avg QP:15.31  size: 51639
    [libx264 @ 0x6d21600] frame P:22588 Avg QP:18.24  size:  1279
    [libx264 @ 0x6d21600] mb I  I16..4: 100.0%  0.0%  0.0%
    [libx264 @ 0x6d21600] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4: 13.0%  0.0%  0.0%  0.0%  0.0%    skip:86.8%
    [libx264 @ 0x6d21600] coded y,uvDC,uvAC intra: 44.9% 54.0% 29.9% inter: 2.0% 10.9% 0.1%
    [libx264 @ 0x6d21600] i16 v,h,dc,p: 45% 24% 13% 18%
    [libx264 @ 0x6d21600] i8c dc,h,v,p: 51% 20% 18% 11%
    [libx264 @ 0x6d21600] kb/s:3945.79