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  • FFmpeg skipping time after concat

    19 septembre 2017, par Manul Hüttinger

    I am trying to concatenate videos and in my resulting Videos I have the issue that at the concat edges my video is skipping/glitching.


    General Workflow

    in general my workflow looks like this

    1. Stream via ffmpeg
    2. capture stream and segment all 2 mins in to TS files
    3. concat TS file to MP4 video
    4. cut MP4 video at the desired Timestamps

    Detailed Look at Step 4

    as I am handling 2-hours+ videos I don’t want to re-encode the whole video. So I am looking for the closest I Frames to my In and Outpoint and cut 1 Frame before/after. As my result I get 3 Videos (front/middle/back). Now it is only needed to re-encode front and back and concat all three Videos.
    So far the theory


    General Observations

    As I look at my resulting video, I obeservated the following.
    frontpart duration is e.g. 3.2 secs. I skip framewise through the Video and get nice and clean timestamps ( 00:00:02.620, 00:00:02:660 )
    As soon as I get to my cutting edge the timestamps are skipping some frames and changing (00:00:03.200, 00:00:03.408 ,00:00:03.409). When I look only at the single frame images, their are no missing/dropped frames

    when I concat my TS files, the results contains a messed up frame rate e.g from constant 25 F/s to 25.0096 F/s


    FFMPEG instructions

    FRONT Video

    ffmpeg -ss 232.52 -i src.mp4 -t 3.24 -filter_complex "setpts=PTS-STARTPTS" -vcodec libx264 -profile:v baseline -level 31 -bf 0  -f mp4 -y front.mp4
    ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
     configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
     libavutil      55. 58.100 / 55. 58.100
     libavcodec     57. 89.100 / 57. 89.100
     libavformat    57. 71.100 / 57. 71.100
     libavdevice    57.  6.100 / 57.  6.100
     libavfilter     6. 82.100 /  6. 82.100
     libswscale      4.  6.100 /  4.  6.100
     libswresample   2.  7.100 /  2.  7.100
     libpostproc    54.  5.100 / 54.  5.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf55.33.100
     Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
       Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
       Metadata:
         handler_name    : VideoHandler
       Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
    Stream mapping:
     Stream #0:0 (h264) -> setpts (graph 0)
     setpts (graph 0) -> Stream #0:0 (libx264)
     Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    Press [q] to stop, [?] for help
    [libx264 @ 0x31ea160] using SAR=1/1
    [libx264 @ 0x31ea160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX LZCNT
    [libx264 @ 0x31ea160] profile Constrained Baseline, level 3.1
    [libx264 @ 0x31ea160] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 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=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 'front.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf57.71.100
       Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
       Metadata:
         encoder         : Lavc57.89.100 libx264
       Side data:
         cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
       Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 69 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
         encoder         : Lavc57.89.100 aac
    frame=   81 fps= 31 q=-1.0 Lsize=     151kB time=00:00:03.25 bitrate= 379.5kbits/s speed=1.23x
    video:119kB audio:28kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.531915%
    [libx264 @ 0x31ea160] frame I:1     Avg QP:17.43  size: 38268
    [libx264 @ 0x31ea160] frame P:80    Avg QP:21.05  size:  1038
    [libx264 @ 0x31ea160] mb I  I16..4: 71.4%  0.0% 28.6%
    [libx264 @ 0x31ea160] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4:  7.8%  1.8%  0.6%  0.0%  0.0%    skip:89.6%
    [libx264 @ 0x31ea160] coded y,uvDC,uvAC intra: 21.8% 40.8% 23.1% inter: 1.6% 4.2% 0.2%
    [libx264 @ 0x31ea160] i16 v,h,dc,p: 66% 25%  5%  4%
    [libx264 @ 0x31ea160] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 28% 15%  4%  4%  5%  4%  5%  4%
    [libx264 @ 0x31ea160] i8c dc,h,v,p: 51% 24% 21%  4%
    [libx264 @ 0x31ea160] ref P L0: 74.3% 15.2% 10.5%
    [libx264 @ 0x31ea160] kb/s:299.56
    [aac @ 0x31edfa0] Qavg: 123.323

    MIDDLE Video

    ffmpeg -ss 235.88 -i src.mp4 -c copy -t 1492.96 -f mp4 -y middle.mp4
    ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
     configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
     libavutil      55. 58.100 / 55. 58.100
     libavcodec     57. 89.100 / 57. 89.100
     libavformat    57. 71.100 / 57. 71.100
     libavdevice    57.  6.100 / 57.  6.100
     libavfilter     6. 82.100 /  6. 82.100
     libswscale      4.  6.100 /  4.  6.100
     libswresample   2.  7.100 /  2.  7.100
     libpostproc    54.  5.100 / 54.  5.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf55.33.100
     Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
       Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
       Metadata:
         handler_name    : VideoHandler
       Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
    Output #0, mp4, to 'middle.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf57.71.100
       Stream #0:0(und): Video: h264 (Main) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=2-31, 537 kb/s, 25 fps, 25 tbr, 90k tbn, 90k tbc (default)
       Metadata:
         handler_name    : VideoHandler
       Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 65 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
    Stream mapping:
     Stream #0:0 -> #0:0 (copy)
     Stream #0:1 -> #0:1 (copy)
    Press [q] to stop, [?] for help
    frame=37329 fps=16333 q=-1.0 Lsize=  113774kB time=00:24:52.95 bitrate= 624.3kbits/s speed= 653x
    video:100359kB audio:12095kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.173957%

    BACK Video

    ffmpeg -ss 1728.88 -i 'src.mp4' -t 3.9199999999998 -filter_complex "setpts=PTS-STARTPTS" -vcodec libx264 -profile:v baseline -level 31 -bf 0  -f mp4 -y back.mp4
    ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
     configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
     libavutil      55. 58.100 / 55. 58.100
     libavcodec     57. 89.100 / 57. 89.100
     libavformat    57. 71.100 / 57. 71.100
     libavdevice    57.  6.100 / 57.  6.100
     libavfilter     6. 82.100 /  6. 82.100
     libswscale      4.  6.100 /  4.  6.100
     libswresample   2.  7.100 /  2.  7.100
     libpostproc    54.  5.100 / 54.  5.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'src.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf55.33.100
     Duration: 01:06:00.33, start: 0.000000, bitrate: 610 kb/s
       Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], 537 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
       Metadata:
         handler_name    : VideoHandler
       Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 65 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
    Stream mapping:
     Stream #0:0 (h264) -> setpts (graph 0)
     setpts (graph 0) -> Stream #0:0 (libx264)
     Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    Press [q] to stop, [?] for help
    [libx264 @ 0x2672160] using SAR=1/1
    [libx264 @ 0x2672160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX LZCNT
    [libx264 @ 0x2672160] profile Constrained Baseline, level 3.1
    [libx264 @ 0x2672160] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 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=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 'back.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf57.71.100
       Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x464 [SAR 1:1 DAR 80:29], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
       Metadata:
         encoder         : Lavc57.89.100 libx264
       Side data:
         cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
       Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 69 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
         encoder         : Lavc57.89.100 aac
    frame=   98 fps= 27 q=-1.0 Lsize=     268kB time=00:00:03.92 bitrate= 559.2kbits/s speed=1.07x
    video:230kB audio:33kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.538479%
    [libx264 @ 0x2672160] frame I:1     Avg QP:19.57  size:112129
    [libx264 @ 0x2672160] frame P:97    Avg QP:21.68  size:  1270
    [libx264 @ 0x2672160] mb I  I16..4: 35.4%  0.0% 64.6%
    [libx264 @ 0x2672160] mb P  I16..4:  0.2%  0.0%  0.1%  P16..4:  6.9%  2.0%  0.8%  0.0%  0.0%    skip:90.1%
    [libx264 @ 0x2672160] coded y,uvDC,uvAC intra: 54.4% 69.1% 54.2% inter: 2.0% 3.6% 0.3%
    [libx264 @ 0x2672160] i16 v,h,dc,p: 63% 23%  8%  6%
    [libx264 @ 0x2672160] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 17% 11%  6%  8%  9%  7%  8%  8%
    [libx264 @ 0x2672160] i8c dc,h,v,p: 50% 18% 24%  7%
    [libx264 @ 0x2672160] ref P L0: 81.8% 11.5%  6.7%
    [libx264 @ 0x2672160] kb/s:480.15
    [aac @ 0x2675fa0] Qavg: 119.994

    CONCAT Videos

    ffmpeg -f concat -safe 0 -i concat.txt -c copy -r 25 -y /concat.mp4
    ffmpeg version n3.3 Copyright (c) 2000-2017 the FFmpeg developers
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
     configuration: --prefix=/usr --extra-cflags=-I/usr/include --extra-ldflags=-L/usr/lib --bindir=/usr/local/bin --extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-libssh --enable-openssl
     libavutil      55. 58.100 / 55. 58.100
     libavcodec     57. 89.100 / 57. 89.100
     libavformat    57. 71.100 / 57. 71.100
     libavdevice    57.  6.100 / 57.  6.100
     libavfilter     6. 82.100 /  6. 82.100
     libswscale      4.  6.100 /  4.  6.100
     libswresample   2.  7.100 /  2.  7.100
     libpostproc    54.  5.100 / 54.  5.100
    Input #0, concat, from 'concat.txt':
     Duration: N/A, start: 0.000000, bitrate: N/A
       Stream #0:0: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x464 [SAR 1:1 DAR 80:29], 25 fps, 25 tbr, 90k tbn, 50 tbc
       Stream #0:1(und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, mono, fltp, 74 kb/s
    Output #0, mp4, to 'concat.mp4':
     Metadata:
       encoder         : Lavf57.71.100
       Stream #0:0: Video: h264 (Constrained Baseline) ([33][0][0][0] / 0x0021), yuv420p(progressive), 1280x464 [SAR 1:1 DAR 80:29], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc
       Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, mono, fltp, 74 kb/s
    Stream mapping:
     Stream #0:0 -> #0:0 (copy)
     Stream #0:1 -> #0:1 (copy)
    Press [q] to stop, [?] for help
    frame=37508 fps=7256 q=-1.0 Lsize=  114285kB time=00:25:00.59 bitrate= 623.9kbits/s speed= 290x
    video:100672kB audio:12598kB subtitle:0kB other streams:0kB global headers:1kB muxing overhead: 0.896435%

    If needed I can provide samples.

  • ffmpeg pipe webcam stream input to two outputs image and video with audio included

    23 septembre 2017, par Arianna Gomez Vargas

    I have the next command :

    sudo ffmpeg -ar 44100 -ac 2 -f alsa -i hw:1,0 -f v4l2 -codec:v h264       -codec:a aac -ab 128k -framerate 30 -video_size hd720 -itsoffset 0.5 -i /dev/video0 -vf fps=1 snapsh%d.png -f mpeg -b:v 5000k -copyinkf -codec:v copy -codec:a aac -ab 128k -g 10 - | sudo ffmpeg -y -i - out.mp4

    and the objetive it is record audio and video simultaneously, and pipe the output to be capable to take screnshots of the output video. I’m using a logitech webcam, raspberry pi 3, the last version of ffmpeg with h264 and alsa support.

    But it is not working for me :(, I think that the problem it is enconding the audio stream, but I can find a solution yet.
    Someone have any suggest ? Thanks

    This is the output

    ffmpeg version N-86204-g8794cfb Copyright (c) 2000-2017 the FFmpeg developers
    built with gcc 4.9.2 (Raspbian 4.9.2-10)
    configuration: --enable-nonfree --enable-gpl --enable-libx264 --enable-libfdk-aac
    libavutil 55. 63.100 / 55. 63.100
    libavcodec 57. 96.101 / 57. 96.101
    libavformat 57. 72.101 / 57. 72.101
    libavdevice 57. 7.100 / 57. 7.100
    libavfilter 6. 90.100 / 6. 90.100
    libswscale 4. 7.101 / 4. 7.101
    libswresample 2. 8.100 / 2. 8.100
    libpostproc 54. 6.100 / 54. 6.100
    Guessed Channel Layout for Input Stream #0.0 : stereo
    Input #0, alsa, from 'hw:1,0':
    Duration: N/A, start: 1506129856.832380, bitrate: 1024 kb/s
    Stream #0:0: Audio: pcm_s16le, 32000 Hz, stereo, s16, 1024 kb/s
    Input #1, video4linux2,v4l2, from '/dev/video0':
    Duration: N/A, start: 1821.745623, bitrate: N/A
    Stream #1:0: Video: h264 (Constrained Baseline), yuvj420p(pc, progressive), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 1000k tbn, 60 tbc
    Stream mapping:
    Stream #1:0 -> #0:0 (h264 (native) -> png (native))
    Stream #1:0 -> #1:0 (copy)
    Stream #0:0 -> #1:1 (pcm_s16le (native) -> aac (native))
    Press [q] to stop, [?] for help
    [video4linux2,v4l2 @ 0x23a2710] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
    [swscaler @ 0x25d4f40] deprecated pixel format used, make sure you did set range correctly
    [swscaler @ 0x25d4f40] No accelerated colorspace conversion found from yuv420p to rgb24.
    Output #0, image2, to '/home/pi/proyecto-aula-master/Videos/snapsh%d.png':
    Metadata:
    encoder : Lavf57.72.101
    Stream #0:0: Video: png, rgb24, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 1 fps, 1 tbn, 1 tbc
    Metadata:
    encoder : Lavc57.96.101 png
    [alsa @ 0x23904f0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
    [mpeg @ 0x23a48d0] VBV buffer size not set, using default size of 130KB
    If you want the mpeg file to be compliant to some specification
    Like DVD, VCD or others, make sure you set the correct buffer size
    Output #1, mpeg, to 'pipe:':
    Metadata:
    encoder : Lavf57.72.101
    Stream #1:0: Video: h264 (Constrained Baseline), yuvj420p(pc, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 5000 kb/s, 30 fps, 30 tbr, 90k tbn, 30 tbc
    Stream #1:1: Audio: aac (LC), 32000 Hz, stereo, fltp, 128 kb/s
    Metadata:
    encoder : Lavc57.96.101 aac
    [mpeg @ 0x23a48d0] Non-monotonous DTS in output stream 1:0; previous: 45000, current: 29998; changing to 45001. This may result in incorrect timestamps in the output file.
    [mpeg @ 0x23a48d0] Non-monotonous DTS in output stream 1:0; previous: 45001, current: 32879; changing to 45002. This may result in incorrect timestamps in the output file.
    [mpeg @ 0x23a48d0] Non-monotonous DTS in output stream 1:0; previous: 45002, current: 35759; changing to 45003. This may result in incorrect timestamps in the output file.
    [mpeg @ 0x23a48d0] Non-monotonous DTS in output stream 1:0; previous: 45003, current: 38999; changing to 45004. This may result in incorrect timestamps in the output file.
    [mpeg @ 0x23a48d0] Non-monotonous DTS in output stream 1:0; previous: 45004, current: 41880; changing to 45005. This may result in incorrect timestamps in the output file.
    [mpeg @ 0x23a48d0] Non-monotonous DTS in output stream 1:0; previous: 45005, current: 44759; changing to 45006. This may result in incorrect timestamps in the output file.
    frame= 0 fps=0.0 q=0.0 q=-1.0 size=N/A time=00:00:01.09 bitrate=N/A speed=2.0frame= 2 fps=1.8 q=0.0 q=-1.0 size=N/A time=00:00:01.76 bitrate=N/A dup=1 dro[alsa @ 0x23904f0] ALSA buffer xrun.
    frame= 3 fps=1.8 q=-0.0 q=-1.0 size=N/A time=00:00:02.19 bitrate=N/A dup=1 drframe= 3 fps=1.4 q=-0.0 q=-1.0 size=N/A time=00:00:02.86 bitrate=N/A dup=1 drframe= 4 fps=1.5 q=-0.0 q=-1.0 size=N/A time=00:00:03.36 bitrate=N/A dup=1 drframe= 4 fps=1.3 q=-0.0 q=-1.0 size=N/A time=00:00:03.86 bitrate=N/A dup=1 drframe= 5 fps=1.4 q=-0.0 q=-1.0 size=N/A time=00:00:04.36 bitrate=N/A dup=1 drframe= 5 fps=1.2 q=-0.0 q=-1.0 size=N/A time=00:00:04.86 bitrate=N/A dup=1 dr[alsa @ 0x23904f0] ALSA buffer xrun.
    [mp2 @ 0x262b660] Header missing
    frame= 6 fps=1.2 q=-0.0 q=-1.0 size=N/A time=00:00:05.38 bitrate=N/A dup=1 drframe= 7 fps=1.3 q=-0.0 q=-1.0 size=N/A time=00:00:06.16 bitrate=N/A dup=1 drframe= 7 fps=1.2 q=-0.0 q=-1.0 size=N/A time=00:00:06.79 bitrate=N/A dup=1 drframe= 8 fps=1.2 q=-0.0 q=-1.0 size=N/A time=00:00:07.29 bitrate=N/A dup=1 drframe= 8 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:07.79 bitrate=N/A dup=1 dr[alsa @ 0x23904f0] ALSA buffer xrun.
    frame= 9 fps=1.2 q=-0.0 q=-1.0 size=N/A time=00:00:08.16 bitrate=N/A dup=1 dr[mpeg @ 0x262a1c0] DTS discontinuity in stream 1: packet 6 with DTS 92886, packet 7 with DTS 95880
    frame= 9 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:08.38 bitrate=N/A dup=1 drframe= 10 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:09.19 bitrate=N/A dup=1 drframe= 10 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:09.96 bitrate=N/A dup=1 drframe= 11 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:10.39 bitrate=N/A dup=1 drframe= 11 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:10.96 bitrate=N/A dup=1 dr[alsa @ 0x23904f0] ALSA buffer xrun.
    frame= 12 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:11.40 bitrate=N/A dup=1 drframe= 12 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:12.06 bitrate=N/A dup=1 drframe= 13 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:12.56 bitrate=N/A dup=1 drframe= 13 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:13.06 bitrate=N/A dup=1 drframe= 14 fps=1.1 q=-0.0 q=-1.0 size=N/A time=00:00:13.56 bitrate=N/A dup=1 drframe= 14 fps=1.0 q=-0.0 q=-1.0 size=N/A time=00:00:14.06 bitrate=N/A dup=1 dr[alsa @ 0x23904f0] ALSA buffer xrun.
    [mpeg @ 0x262a1c0] decoding for stream 0 failed
    [mpeg @ 0x262a1c0] Could not find codec parameters for stream 0 (Audio: mp2, 0 channels, s16p): unspecified frame size
    Consider increasing the value for the 'analyzeduration' and 'probesize' options
    Input #0, mpeg, from 'pipe:':
    Duration: N/A, start: 0.500000, bitrate: N/A
    Stream #0:0[0x1c0]: Audio: mp2, 0 channels, s16p
    Stream #0:1[0x1e2]: Video: h264 (Constrained Baseline), yuvj420p(pc, progressive), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc
    Stream mapping:
    Stream #0:1 -> #0:0 (h264 (native) -> h264 (libx264))
    Stream #0:0 -> #0:1 (mp2 (native) -> aac (native))
    [mp2 @ 0x262cde0] Header missing
    Error while decoding stream #0:0: Invalid data found when processing input
    No pixel format specified, yuvj420p for H.264 encoding chosen.
    Use -pix_fmt yuv420p for compatibility with outdated media players.
    [libx264 @ 0x26417d0] using SAR=1/1
    [libx264 @ 0x26417d0] using cpu capabilities: ARMv6 NEON
    [libx264 @ 0x26417d0] profile High, level 3.1
    [libx264 @ 0x26417d0] 264 - core 150 r2833 df79067 - 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=-2 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
    frame= 19 fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 36 fps= 34 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 47 fps=9.5 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 52 fps=9.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 56 fps=9.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 60 fps=8.8 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 64 fps=8.6 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 69 fps=7.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 71 fps=7.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 73 fps=6.9 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 76 fps=6.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 80 fps=6.3 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 82 fps=5.8 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 85 fps=5.8 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 87 fps=5.7 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 89 fps=5.4 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 90 fps=5.3 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 93 fps=5.3 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 95 fps=5.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 97 fps=5.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 99 fps=5.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 102 fps=5.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 103 fps=4.9 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 105 fps=4.7 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 108 fps=4.7 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 110 fps=4.7 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 112 fps=4.6 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 114 fps=4.5 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 117 fps=4.5 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 120 fps=4.5 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 122 fps=4.4 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 123 fps=4.4 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 126 fps=4.3 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 128 fps=4.3 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 130 fps=4.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 132 fps=4.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 135 fps=4.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbframe= 138 fps=4.2 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbToo many packets buffered for output stream 0:0.
    [libx264 @ 0x26417d0] frame I:1 Avg QP:16.64 size: 29761
    [libx264 @ 0x26417d0] frame P:36 Avg QP:21.71 size: 9196
    [libx264 @ 0x26417d0] frame B:92 Avg QP:24.13 size: 4641
    [libx264 @ 0x26417d0] consecutive B-frames: 0.8% 0.0% 32.1% 67.2%
    [libx264 @ 0x26417d0] mb I I16..4: 24.3% 49.7% 25.9%
    [libx264 @ 0x26417d0] mb P I16..4: 11.2% 10.0% 0.2% P16..4: 41.0% 6.2% 3.7% 0.0% 0.0% skip:27.7%
    [libx264 @ 0x26417d0] mb B I16..4: 5.0% 5.5% 0.0% B16..8: 40.1% 3.0% 0.2% direct: 1.6% skip:44.6% L0:59.9% L1:38.4% BI: 1.7%
    [libx264 @ 0x26417d0] 8x8 transform intra:49.7% inter:79.4%
    [libx264 @ 0x26417d0] coded y,uvDC,uvAC intra: 10.0% 13.9% 0.3% inter: 8.6% 11.3% 0.0%
    [libx264 @ 0x26417d0] i16 v,h,dc,p: 43% 24% 16% 16%
    [libx264 @ 0x26417d0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 42% 18% 36% 1% 0% 0% 1% 0% 1%
    [libx264 @ 0x26417d0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 50% 19% 16% 3% 2% 2% 3% 3% 3%
    [libx264 @ 0x26417d0] i8c dc,h,v,p: 70% 14% 16% 0%
    [libx264 @ 0x26417d0] Weighted P-Frames: Y:2.8% UV:0.0%
    [libx264 @ 0x26417d0] ref P L0: 39.8% 7.3% 42.5% 10.4% 0.0%
    [libx264 @ 0x26417d0] ref B L0: 44.7% 41.0% 14.2%
    [libx264 @ 0x26417d0] ref B L1: 70.0% 30.0%
    [libx264 @ 0x26417d0] kb/s:1465.58
    Exiting normally, received signal 2.
  • Rematrix is needed between 10 channels and mono but there is not enough information to do it

    8 octobre 2017, par siriele

    I’ve been fighting for a number of days now trying to get FFmpeg working with combining several audio files at specific times into one file. So my idea was to generate silence up to the time i want to play a sound.Then merge the audio together with a filter. The below code works when I have five or less files, but seems to fall apart. What I’m trying

    ffmpeg \
       -i "tutorial_bass/C-maj/TutorialBassJR.wav" \
       -i "tutorial_drums/TutorialDrumsJR.wav" \
       -i "tutorial_drums/TutorialDrumsTU.wav" \
       -i "tutorial_bass/C-maj/TutorialBassTU.wav" \
       -i "tutorial_drums/TutorialDrumsTU.wav" \
       -i "tutorial_drums/TutorialDrumsTD.wav" \
       -i "tutorial_bass/C-maj/TutorialBassTD.wav" \
       -i "tutorial_drums/TutorialDrumsTD.wav" \
       -i "tutorial_drums/TutorialDrumsTR.wav" \
       -i "tutorial_bass/C-maj/TutorialBassTR.wav" \
       -i "tutorial_drums/TutorialDrumsTR.wav" \
       -i "tutorial_drums/TutorialDrumsWL.wav" \
       -i "tutorial_bass/C-maj/TutorialBassWL.wav" \
       -i "tutorial_drums/TutorialDrumsWL.wav" \
       -i "tutorial_drums/TutorialDrumsWU.wav" \
       -i "tutorial_bass/C-maj/TutorialBassWU.wav" \
       -i "tutorial_drums/TutorialDrumsWU.wav" \
       -i "tutorial_drums/TutorialDrumsWD.wav" \
       -i "tutorial_bass/C-maj/TutorialBassWD.wav" \
       -i "tutorial_drums/TutorialDrumsWD.wav" \
       -i "tutorial_drums/TutorialDrumsJL.wav" \
       -i "tutorial_bass/C-maj/TutorialBassJL.wav" \
       -i "tutorial_drums/TutorialDrumsJL.wav" \
       -i "tutorial_drums/TutorialDrumsJR.wav" \
       -i "tutorial_bass/C-maj/TutorialBassJR.wav" \
       -i "tutorial_drums/TutorialDrumsJR.wav" \
       -i "tutorial_drums/TutorialDrumsJU.wav" \
       -i "tutorial_bass/C-maj/TutorialBassJU.wav" \
       -i "tutorial_drums/TutorialDrumsJU.wav" \
       -i "tutorial_drums/TutorialDrumsJD.wav" \
       -i "tutorial_bass/C-maj/TutorialBassJD.wav" \
       -i "tutorial_drums/TutorialDrumsJD.wav" \
       -i "tutorial_drums/TutorialDrumsTL.wav" \
       -i "tutorial_bass/C-maj/TutorialBassTL.wav" \
       -i "tutorial_drums/TutorialDrumsTL.wav" \
       -i "tutorial_drums/TutorialDrumsTR.wav" \
       -i "tutorial_bass/C-maj/TutorialBassTR.wav" \
       -i "tutorial_drums/TutorialDrumsTR.wav" \
       -i "tutorial_drums/TutorialDrumsTU.wav" \
       -i "tutorial_bass/C-maj/TutorialBassTU.wav" \
       -i "tutorial_drums/TutorialDrumsTU.wav" \
       -i "tutorial_drums/TutorialDrumsTD.wav" \
       -i "tutorial_bass/C-maj/TutorialBassTD.wav" \
       -i "tutorial_drums/TutorialDrumsTD.wav" \
       -filter_complex "\
       aevalsrc=0:d=3.0  [d0];\
       aevalsrc=0:d=3.0  [d1];\
       aevalsrc=0:d=4.5  [d2];\
       aevalsrc=0:d=4.5  [d3];\
       aevalsrc=0:d=4.5  [d4];\
       aevalsrc=0:d=6.0  [d5];\
       aevalsrc=0:d=6.0  [d6];\
       aevalsrc=0:d=6.0  [d7];\
       aevalsrc=0:d=7.5  [d8];\
       aevalsrc=0:d=7.5  [d9];\
       aevalsrc=0:d=7.5  [d10];\
       aevalsrc=0:d=9.0  [d11];\
       aevalsrc=0:d=9.0  [d12];\
       aevalsrc=0:d=9.0  [d13];\
       aevalsrc=0:d=10.5 [d14];\
       aevalsrc=0:d=10.5 [d15];\
       aevalsrc=0:d=10.5 [d16];\
       aevalsrc=0:d=12.0 [d17];\
       aevalsrc=0:d=12.0 [d18];\
       aevalsrc=0:d=12.0 [d19];\
       aevalsrc=0:d=13.5 [d20];\
       aevalsrc=0:d=13.5 [d21];\
       aevalsrc=0:d=13.5 [d22];\
       aevalsrc=0:d=15.0 [d23];\
       aevalsrc=0:d=15.0 [d24];\
       aevalsrc=0:d=15.0 [d25];\
       aevalsrc=0:d=16.5 [d26];\
       aevalsrc=0:d=16.5 [d27];\
       aevalsrc=0:d=16.5 [d28];\
       aevalsrc=0:d=18.0 [d29];\
       aevalsrc=0:d=18.0 [d30];\
       aevalsrc=0:d=18.0 [d31];\
       aevalsrc=0:d=19.5 [d32];\
       aevalsrc=0:d=19.5 [d33];\
       aevalsrc=0:d=19.5 [d34];\
       aevalsrc=0:d=21.0 [d35];\
       aevalsrc=0:d=21.0 [d36];\
       aevalsrc=0:d=21.0 [d37];\
       aevalsrc=0:d=22.5 [d38];\
       aevalsrc=0:d=22.5 [d39];\
       aevalsrc=0:d=22.5 [d40];\
       aevalsrc=0:d=24.0 [d41];\
       aevalsrc=0:d=24.0 [d42];\
       aevalsrc=0:d=24.0 [d43];\
       [d0][0:a]concat=n=2:v=0:a=1   [a0];\
       [d1][1:a]concat=n=2:v=0:a=1   [a1];\
       [d2][2:a]concat=n=2:v=0:a=1   [a2];\
       [d3][3:a]concat=n=2:v=0:a=1   [a3];\
       [d4][4:a]concat=n=2:v=0:a=1   [a4];\
       [d5][5:a]concat=n=2:v=0:a=1   [a5];\
       [d6][6:a]concat=n=2:v=0:a=1   [a6];\
       [d7][7:a]concat=n=2:v=0:a=1   [a7];\
       [d8][8:a]concat=n=2:v=0:a=1   [a8];\
       [d9][9:a]concat=n=2:v=0:a=1   [a9];\
       [d10][10:a]concat=n=2:v=0:a=1 [a10];\
       [d11][11:a]concat=n=2:v=0:a=1 [a11];\
       [d12][12:a]concat=n=2:v=0:a=1 [a12];\
       [d13][13:a]concat=n=2:v=0:a=1 [a13];\
       [d14][14:a]concat=n=2:v=0:a=1 [a14];\
       [d15][15:a]concat=n=2:v=0:a=1 [a15];\
       [d16][16:a]concat=n=2:v=0:a=1 [a16];\
       [d17][17:a]concat=n=2:v=0:a=1 [a17];\
       [d18][18:a]concat=n=2:v=0:a=1 [a18];\
       [d19][19:a]concat=n=2:v=0:a=1 [a19];\
       [d20][20:a]concat=n=2:v=0:a=1 [a20];\
       [d21][21:a]concat=n=2:v=0:a=1 [a21];\
       [d22][22:a]concat=n=2:v=0:a=1 [a22];\
       [d23][23:a]concat=n=2:v=0:a=1 [a23];\
       [d24][24:a]concat=n=2:v=0:a=1 [a24];\
       [d25][25:a]concat=n=2:v=0:a=1 [a25];\
       [d26][26:a]concat=n=2:v=0:a=1 [a26];\
       [d27][27:a]concat=n=2:v=0:a=1 [a27];\
       [d28][28:a]concat=n=2:v=0:a=1 [a28];\
       [d29][29:a]concat=n=2:v=0:a=1 [a29];\
       [d30][30:a]concat=n=2:v=0:a=1 [a30];\
       [d31][31:a]concat=n=2:v=0:a=1 [a31];\
       [d32][32:a]concat=n=2:v=0:a=1 [a32];\
       [d33][33:a]concat=n=2:v=0:a=1 [a33];\
       [d34][34:a]concat=n=2:v=0:a=1 [a34];\
       [d35][35:a]concat=n=2:v=0:a=1 [a35];\
       [d36][36:a]concat=n=2:v=0:a=1 [a36];\
       [d37][37:a]concat=n=2:v=0:a=1 [a37];\
       [d38][38:a]concat=n=2:v=0:a=1 [a38];\
       [d39][39:a]concat=n=2:v=0:a=1 [a39];\
       [d40][40:a]concat=n=2:v=0:a=1 [a40];\
       [d41][41:a]concat=n=2:v=0:a=1 [a41];\
       [d42][42:a]concat=n=2:v=0:a=1 [a42];\
       [d43][43:a]concat=n=2:v=0:a=1 [a43];\
       [a0][a1][a2][a3][a4][a5][a6][a7][a8][a9][a10][a11][a12][a13][a14][a15][a16][a17][a18][a19]amix=inputs=20:duration=longest [a0-a19];\
       [a20][a21][a22][a23][a24][a25][a26][a27][a28][a29][a30][a31][a32][a33][a34][a35][a36][a37][a38][a39]amix=inputs=20:duration=longest [a20-a39];\
       [a40][a41][a42][a43]amix=inputs=4:duration=longest [a40-a43];
       [a0-a19][a20-a39][a40-a43]amix=inputs=3:duration=longest"  -codec:a libmp3lame output.mp3

    When I run this command I get :

    ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
     built with Apple LLVM version 8.1.0 (clang-802.0.42)
     configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.2.0/include/openjpeg-2.2 --enable-nonfree --enable-vda
     libavutil      55. 58.100 / 55. 58.100
     libavcodec     57. 89.100 / 57. 89.100
     libavformat    57. 71.100 / 57. 71.100
     libavdevice    57.  6.100 / 57.  6.100
     libavfilter     6. 82.100 /  6. 82.100
     libavresample   3.  5.  0 /  3.  5.  0
     libswscale      4.  6.100 /  4.  6.100
     libswresample   2.  7.100 /  2.  7.100
     libpostproc    54.  5.100 / 54.  5.100
    Guessed Channel Layout for Input Stream #0.0 : stereo
    Input #0, wav, from 'tutorial_bass/C-maj/TutorialBassJR.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #0:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #1.0 : stereo
    Input #1, wav, from 'tutorial_drums/TutorialDrumsJR.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #1:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #2.0 : stereo
    Input #2, wav, from 'tutorial_drums/TutorialDrumsTU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #2:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #3.0 : stereo
    Input #3, wav, from 'tutorial_bass/C-maj/TutorialBassTU.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #3:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #4.0 : stereo
    Input #4, wav, from 'tutorial_drums/TutorialDrumsTU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #4:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Input #5, wav, from 'tutorial_drums/TutorialDrumsTD.wav':
     Duration: 00:00:04.50, bitrate: 14112 kb/s
       Stream #5:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, 10 channels, flt, 14112 kb/s
    Guessed Channel Layout for Input Stream #6.0 : stereo
    Input #6, wav, from 'tutorial_bass/C-maj/TutorialBassTD.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #6:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Input #7, wav, from 'tutorial_drums/TutorialDrumsTD.wav':
     Duration: 00:00:04.50, bitrate: 14112 kb/s
       Stream #7:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, 10 channels, flt, 14112 kb/s
    Guessed Channel Layout for Input Stream #8.0 : stereo
    Input #8, wav, from 'tutorial_drums/TutorialDrumsTR.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #8:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #9.0 : stereo
    Input #9, wav, from 'tutorial_bass/C-maj/TutorialBassTR.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #9:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #10.0 : stereo
    Input #10, wav, from 'tutorial_drums/TutorialDrumsTR.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #10:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #11.0 : stereo
    Input #11, wav, from 'tutorial_drums/TutorialDrumsWL.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #11:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #12.0 : stereo
    Input #12, wav, from 'tutorial_bass/C-maj/TutorialBassWL.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #12:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #13.0 : stereo
    Input #13, wav, from 'tutorial_drums/TutorialDrumsWL.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #13:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #14.0 : stereo
    Input #14, wav, from 'tutorial_drums/TutorialDrumsWU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #14:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #15.0 : stereo
    Input #15, wav, from 'tutorial_bass/C-maj/TutorialBassWU.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #15:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #16.0 : stereo
    Input #16, wav, from 'tutorial_drums/TutorialDrumsWU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #16:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #17.0 : stereo
    Input #17, wav, from 'tutorial_drums/TutorialDrumsWD.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #17:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #18.0 : stereo
    Input #18, wav, from 'tutorial_bass/C-maj/TutorialBassWD.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #18:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #19.0 : stereo
    Input #19, wav, from 'tutorial_drums/TutorialDrumsWD.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #19:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #20.0 : stereo
    Input #20, wav, from 'tutorial_drums/TutorialDrumsJL.wav':
     Duration: 00:00:00.75, bitrate: 33869 kb/s
       Stream #20:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #21.0 : stereo
    Input #21, wav, from 'tutorial_bass/C-maj/TutorialBassJL.wav':
     Duration: 00:00:01.51, bitrate: 2822 kb/s
       Stream #21:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #22.0 : stereo
    Input #22, wav, from 'tutorial_drums/TutorialDrumsJL.wav':
     Duration: 00:00:00.75, bitrate: 33869 kb/s
       Stream #22:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #23.0 : stereo
    Input #23, wav, from 'tutorial_drums/TutorialDrumsJR.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #23:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #24.0 : stereo
    Input #24, wav, from 'tutorial_bass/C-maj/TutorialBassJR.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #24:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #25.0 : stereo
    Input #25, wav, from 'tutorial_drums/TutorialDrumsJR.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #25:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #26.0 : stereo
    Input #26, wav, from 'tutorial_drums/TutorialDrumsJU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #26:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #27.0 : stereo
    Input #27, wav, from 'tutorial_bass/C-maj/TutorialBassJU.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #27:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #28.0 : stereo
    Input #28, wav, from 'tutorial_drums/TutorialDrumsJU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #28:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #29.0 : stereo
    Input #29, wav, from 'tutorial_drums/TutorialDrumsJD.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #29:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #30.0 : stereo
    Input #30, wav, from 'tutorial_bass/C-maj/TutorialBassJD.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #30:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #31.0 : stereo
    Input #31, wav, from 'tutorial_drums/TutorialDrumsJD.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #31:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #32.0 : stereo
    Input #32, wav, from 'tutorial_drums/TutorialDrumsTL.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #32:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #33.0 : stereo
    Input #33, wav, from 'tutorial_bass/C-maj/TutorialBassTL.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #33:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #34.0 : stereo
    Input #34, wav, from 'tutorial_drums/TutorialDrumsTL.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #34:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #35.0 : stereo
    Input #35, wav, from 'tutorial_drums/TutorialDrumsTR.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #35:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #36.0 : stereo
    Input #36, wav, from 'tutorial_bass/C-maj/TutorialBassTR.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #36:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #37.0 : stereo
    Input #37, wav, from 'tutorial_drums/TutorialDrumsTR.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #37:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #38.0 : stereo
    Input #38, wav, from 'tutorial_drums/TutorialDrumsTU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #38:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #39.0 : stereo
    Input #39, wav, from 'tutorial_bass/C-maj/TutorialBassTU.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #39:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Guessed Channel Layout for Input Stream #40.0 : stereo
    Input #40, wav, from 'tutorial_drums/TutorialDrumsTU.wav':
     Duration: 00:00:00.75, bitrate: 2822 kb/s
       Stream #40:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Input #41, wav, from 'tutorial_drums/TutorialDrumsTD.wav':
     Duration: 00:00:04.50, bitrate: 14112 kb/s
       Stream #41:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, 10 channels, flt, 14112 kb/s
    Guessed Channel Layout for Input Stream #42.0 : stereo
    Input #42, wav, from 'tutorial_bass/C-maj/TutorialBassTD.wav':
     Duration: 00:00:01.50, bitrate: 2822 kb/s
       Stream #42:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, stereo, flt, 2822 kb/s
    Input #43, wav, from 'tutorial_drums/TutorialDrumsTD.wav':
     Duration: 00:00:04.50, bitrate: 14112 kb/s
       Stream #43:0: Audio: pcm_f32le ([3][0][0][0] / 0x0003), 44100 Hz, 10 channels, flt, 14112 kb/s
    File 'output.mp3' already exists. Overwrite ? [y/N] y
    Stream mapping:
     Stream #0:0 (pcm_f32le) -> concat:in1:a0
     Stream #1:0 (pcm_f32le) -> concat:in1:a0
     Stream #2:0 (pcm_f32le) -> concat:in1:a0
     Stream #3:0 (pcm_f32le) -> concat:in1:a0
     Stream #4:0 (pcm_f32le) -> concat:in1:a0
     Stream #5:0 (pcm_f32le) -> concat:in1:a0
     Stream #6:0 (pcm_f32le) -> concat:in1:a0
     Stream #7:0 (pcm_f32le) -> concat:in1:a0
     Stream #8:0 (pcm_f32le) -> concat:in1:a0
     Stream #9:0 (pcm_f32le) -> concat:in1:a0
     Stream #10:0 (pcm_f32le) -> concat:in1:a0
     Stream #11:0 (pcm_f32le) -> concat:in1:a0
     Stream #12:0 (pcm_f32le) -> concat:in1:a0
     Stream #13:0 (pcm_f32le) -> concat:in1:a0
     Stream #14:0 (pcm_f32le) -> concat:in1:a0
     Stream #15:0 (pcm_f32le) -> concat:in1:a0
     Stream #16:0 (pcm_f32le) -> concat:in1:a0
     Stream #17:0 (pcm_f32le) -> concat:in1:a0
     Stream #18:0 (pcm_f32le) -> concat:in1:a0
     Stream #19:0 (pcm_f32le) -> concat:in1:a0
     Stream #20:0 (pcm_f32le) -> concat:in1:a0
     Stream #21:0 (pcm_f32le) -> concat:in1:a0
     Stream #22:0 (pcm_f32le) -> concat:in1:a0
     Stream #23:0 (pcm_f32le) -> concat:in1:a0
     Stream #24:0 (pcm_f32le) -> concat:in1:a0
     Stream #25:0 (pcm_f32le) -> concat:in1:a0
     Stream #26:0 (pcm_f32le) -> concat:in1:a0
     Stream #27:0 (pcm_f32le) -> concat:in1:a0
     Stream #28:0 (pcm_f32le) -> concat:in1:a0
     Stream #29:0 (pcm_f32le) -> concat:in1:a0
     Stream #30:0 (pcm_f32le) -> concat:in1:a0
     Stream #31:0 (pcm_f32le) -> concat:in1:a0
     Stream #32:0 (pcm_f32le) -> concat:in1:a0
     Stream #33:0 (pcm_f32le) -> concat:in1:a0
     Stream #34:0 (pcm_f32le) -> concat:in1:a0
     Stream #35:0 (pcm_f32le) -> concat:in1:a0
     Stream #36:0 (pcm_f32le) -> concat:in1:a0
     Stream #37:0 (pcm_f32le) -> concat:in1:a0
     Stream #38:0 (pcm_f32le) -> concat:in1:a0
     Stream #39:0 (pcm_f32le) -> concat:in1:a0
     Stream #40:0 (pcm_f32le) -> concat:in1:a0
     Stream #41:0 (pcm_f32le) -> concat:in1:a0
     Stream #42:0 (pcm_f32le) -> concat:in1:a0
     Stream #43:0 (pcm_f32le) -> concat:in1:a0
     amix -> Stream #0:0 (libmp3lame)
    Press [q] to stop, [?] for help
    [auto_resampler_5 @ 0x7fdc19641e00] [SWR @ 0x7fdc1c286e00] Rematrix is needed between 10 channels and mono but there is not enough information to do it
    [auto_resampler_5 @ 0x7fdc19641e00] Failed to configure output pad on auto_resampler_5
    Error reinitializing filters!
    Failed to inject frame into filter network: Invalid argument
    Error while processing the decoded data for stream #43:0
    Conversion failed!

    Any ideas what I’m doing wrong or other approaches I could take to do this ?