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• C# FFMPEG : Code bugs out and stops producing media files

  24 mai 2020, par Hamez

  I've made a joke program in C# that uses ffmpeg to edit videos with different effects such as stuttering. I've finished 3 effects so far and each of them work on their own but as soon as I put one after another e.g.  fx.CrashStutter(0, 2); fx.CrashBeep(2, 2); fx.Wow(4, 2);
The code breaks and no longer produces photo/video files but once I stop debugging the file it was supposed to be processing appears. I've used a system where it loops over trying to execute a command to create a text file as a marker for when ffmpeg is done processing a file. The debug console also repeatedly says "The process tried to write to a nonexistent pipe."

  



  Here's the code for all 3 effects :

  



   public void Wow(double start, double duration)
        {
            if (fxstart == true)
            {
                //MessageBox.Show("WowFX Duration" + duration);
                string folderName = ("W_s" + start);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("mkdir " + folderName);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("cd " + folderName);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("ffmpeg -ss " + start + " -t " + (duration / 6) + " -i " + source + " a.mp4");
                //wait until a.mp4 appears
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\a.txt") == false)
                {
                    /*aha got a live one!*/FXcmd.StandardInput.WriteLine(" echo a > a.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -i a.mp4 -vf reverse -af areverse b.mp4");
                //wait until b.mp4 appears
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\b.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo b > b.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -ss " + start + " -t " + (duration / 3) + " -i " + source + " c.mp4");
                //wait until c.mp4 appears
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\c.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo c > c.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -i c.mp4 -vf reverse -af areverse d.mp4");
                //wait until d.mp4 appears
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\d.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo d > d.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                string[] concatList = { "file 'a.mp4'", "file 'b.mp4'", "file 'c.mp4'", "file 'd.mp4'" };
                //FXcmd.StandardInput.Write("del a.txt, b.txt, c.txt, d.txt");
                //System.Threading.Thread.Sleep(1000);
                System.IO.File.WriteAllLines(("FxSource(Temporary)\\" + folderName + "\\concatList.txt"), concatList);
                System.Threading.Thread.Sleep(1500);
                FXcmd.StandardInput.WriteLine("ffmpeg -f concat -i concatList.txt -c copy " + folderName + ".mp4");
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\" + "1.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo 1 > 1.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("copy " + folderName + ".mp4 ..");
                while (File.Exists("FxSource(Temporary)\\" + folderName + ".mp4") == false)
                {
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("cd ..");
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("cls");
                FXcmd.StandardInput.Flush();
            }
        }
        public void CrashStutter(int start, int duration)
        {
            if (fxstart == true)
            {
                string folderName = ("Cs_s" + start);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("mkdir " + folderName);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("cd " + folderName);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("ffmpeg -ss " + start + " -t 0.1" + " -i " + source + " a.mp4");
                System.Threading.Thread.Sleep(100);
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\a.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo a > a.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -stream_loop "+10*duration+" -i a.mp4 "+folderName+".mp4");
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\" + "1.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo 1 > 1.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("copy " + folderName + ".mp4 ..");
                while (File.Exists("FxSource(Temporary)\\" + folderName + ".mp4") == false)
                {
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("cd ..");
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("cls");
                FXcmd.StandardInput.Flush();
            }
        }
        public void CrashBeep(int start, int duration)
        {
            //this effect cannot last longer than 7 seconds
            double contrast = 25;
            double red = 0.75;
            if (fxstart == true)
            {
                string folderName = ("Cb_s" + start);
                FXcmd.StandardInput.WriteLine("mkdir " + folderName);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("cd " + folderName);
                System.Threading.Thread.Sleep(100);
                /*gets stuck*/FXcmd.StandardInput.WriteLine("ffmpeg -i "+source+ " -vf fps=1 a.jpg");
                System.Threading.Thread.Sleep(100);
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\a.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo a > a.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -i a.jpg -vf eq=contrast="+contrast+" b.jpg");
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\b.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo b > b.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -i b.jpg -vf colorbalance=rm=" + red + " c.jpg");
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\c.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo > c.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -loop 1 -i c.jpg -c:v libx264 -t "+ duration +" -pix_fmt yuv420p -vf scale=1920:1080 d.mp4");
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\d.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo d > d.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("cd ..");
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("copy beep.mp3 "+folderName+"/beep.mp3");
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("cd "+folderName);
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("ffmpeg -i beep.mp3 -ss 0 -t " + duration + " e.mp3");
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\e.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo e > e.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("ffmpeg -i d.mp4 -i e.mp3 -c copy -map 0:v:0 -map 1:a:0 " + folderName + ".mp4");
                while (File.Exists("FxSource(Temporary)\\" + folderName + "\\" + "1.txt") == false)
                {
                    FXcmd.StandardInput.WriteLine(" echo 1 > 1.txt");
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("copy " + folderName + ".mp4 ..");
                while (File.Exists("FxSource(Temporary)\\" + folderName + ".mp4") == false)
                {
                    System.Threading.Thread.Sleep(1500);
                }
                FXcmd.StandardInput.WriteLine("cd ..");
                System.Threading.Thread.Sleep(100);
                FXcmd.StandardInput.WriteLine("cls");
                FXcmd.StandardInput.Flush();
            }
        }


  



  Any suggestions ? Thanks !

  


• ffmpeg - convert video file with 1 frame video and 4 minutes audio to HTML5 video

  4 juin 2020, par d3im

  Have this input video - it's 1 frame video (=picture) with audio :

  



      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:04:34.55, start: 0.000000, bitrate: 122 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 480x360 [SAR 1:1 DAR 4:3], 6375600 kb/s, 90k fps, 90k tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 120 kb/s (default)
    Metadata:
      handler_name    : SoundHandler


  



  I need to convert it to mp4 with video track of length of audio for HTML5 - but ffmpeg (4.2.3) says :

  



  Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
[libfdk_aac @ 0x55f35bf28100] Note, the VBR setting is unsupported and only works with some parameter combinations
Too many packets buffered for output stream 0:1.
[libfdk_aac @ 0x55f35bf28100] 2 frames left in the queue on closing
Conversion failed!


  



  Converting audio or video alone is successful.

  



  Converting with -c:v copy is successful but it's not what I need.

  



  adding -max_muxing_queue_size 9999 didn't help.

  



  EDIT :

  



  full command :

  



  ffmpeg -i input.mp4 -c:a libfdk_aac -vbr 2 -c:v libx264 -crf 28 -profile:v high -level 41 -vf format=yuv420p -sn -sample_fmt s16 -ac 1 -threads 0 -map_metadata -1 low.mp4


  



  full log :

  



  ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.0 (Gentoo 9.3.0 p2)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-4.2.3/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-O2 -pipe -march=haswell -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt -mno-rtm -mno-hle -mrdrnd -mf16c -mfsgsbase -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt -mno-xsavec -mno-xsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma -mno-avx512vbmi -mno-clwb -mno-mwaitx -mno-clzero -mno-pku -mtune=haswell' --disable-static --enable-avfilter --enable-avresample --disable-stripping --disable-optimizations --disable-libcelt --enable-version3 --enable-version3 --disable-indev=oss --disable-outdev=oss --enable-version3 --enable-nonfree --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --enable-gnutls --disable-gmp --enable-gpl --disable-hardcoded-tables --enable-iconv --disable-libtls --disable-libxml2 --enable-lzma --enable-network --disable-opencl --disable-openssl --enable-postproc --enable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --disable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable-openal --enable-opengl --disable-libv4l2 --enable-libpulse --disable-libdrm --enable-libjack --enable-libopencore-amrwb --enable-libopencore-amrnb --disable-libcodec2 --enable-libdav1d --enable-libfdk-aac --enable-libopenjpeg --enable-libbluray --disable-libgme --disable-libgsm --disable-libaribb24 --disable-mmal --disable-libmodplug --enable-libopus --disable-libilbc --enable-librtmp --disable-libssh --enable-libspeex --enable-libsrt --enable-librsvg --disable-ffnvcodec --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-appkit --disable-libbs2b --disable-chromaprint --disable-cuda-llvm --disable-libflite --enable-frei0r --disable-libfribidi --disable-fontconfig --enable-ladspa --disable-libass --disable-libtesseract --enable-lv2 --enable-libfreetype --enable-libvidstab --disable-librubberband --disable-libzmq --disable-libzimg --enable-libsoxr --enable-pthreads --enable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --enable-libaom --disable-libopenh264 --disable-libsnappy --enable-libtheora --disable-libtwolame --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-neon --disable-vfp --disable-vfpv3 --disable-armv8 --disable-mipsdsp --disable-mipsdspr2 --disable-mipsfpu --disable-altivec --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=haswell --disable-doc --disable-htmlpages --enable-manpages
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:04:34.55, start: 0.000000, bitrate: 122 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 480x360 [SAR 1:1 DAR 4:3], 6375600 kb/s, 90k fps, 90k tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 120 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
[libfdk_aac @ 0x55fb6c86b080] Note, the VBR setting is unsupported and only works with some parameter combinations
Too many packets buffered for output stream 0:1.
[libfdk_aac @ 0x55fb6c86b080] 2 frames left in the queue on closing
Conversion failed!


  



  debug verbosity :

  



  ffmpeg -v debug -i input.mp4 -c:a libfdk_aac -vbr 2 -c:v libx264 -crf 28 -profile:v high -level 41 -vf format=yuv420p -sn -sample_fmt s16 -ac 1 -threads 0 -map_metadata -1 low.mp4
ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.0 (Gentoo 9.3.0 p2)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-4.2.3/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-O2 -pipe -march=haswell -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt -mno-rtm -mno-hle -mrdrnd -mf16c -mfsgsbase -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt -mno-xsavec -mno-xsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma -mno-avx512vbmi -mno-clwb -mno-mwaitx -mno-clzero -mno-pku -mtune=haswell' --disable-static --enable-avfilter --enable-avresample --disable-stripping --disable-optimizations --disable-libcelt --enable-version3 --enable-version3 --disable-indev=oss --disable-outdev=oss --enable-version3 --enable-nonfree --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --enable-gnutls --disable-gmp --enable-gpl --disable-hardcoded-tables --enable-iconv --disable-libtls --disable-libxml2 --enable-lzma --enable-network --disable-opencl --disable-openssl --enable-postproc --enable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --disable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable-openal --enable-opengl --disable-libv4l2 --enable-libpulse --disable-libdrm --enable-libjack --enable-libopencore-amrwb --enable-libopencore-amrnb --disable-libcodec2 --enable-libdav1d --enable-libfdk-aac --enable-libopenjpeg --enable-libbluray --disable-libgme --disable-libgsm --disable-libaribb24 --disable-mmal --disable-libmodplug --enable-libopus --disable-libilbc --enable-librtmp --disable-libssh --enable-libspeex --enable-libsrt --enable-librsvg --disable-ffnvcodec --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-appkit --disable-libbs2b --disable-chromaprint --disable-cuda-llvm --disable-libflite --enable-frei0r --disable-libfribidi --disable-fontconfig --enable-ladspa --disable-libass --disable-libtesseract --enable-lv2 --enable-libfreetype --enable-libvidstab --disable-librubberband --disable-libzmq --disable-libzimg --enable-libsoxr --enable-pthreads --enable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --enable-libaom --disable-libopenh264 --disable-libsnappy --enable-libtheora --disable-libtwolame --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-neon --disable-vfp --disable-vfpv3 --disable-armv8 --disable-mipsdsp --disable-mipsdspr2 --disable-mipsfpu --disable-altivec --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=haswell --disable-doc --disable-htmlpages --enable-manpages
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'debug'.
Reading option '-i' ... matched as input url with argument 'input.mp4'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'libfdk_aac'.
Reading option '-vbr' ... matched as AVOption 'vbr' with argument '2'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'libx264'.
Reading option '-crf' ... matched as AVOption 'crf' with argument '28'.
Reading option '-profile:v' ... matched as option 'profile' (set profile) with argument 'high'.
Reading option '-level' ... matched as AVOption 'level' with argument '41'.
Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'format=yuv420p'.
Reading option '-sn' ... matched as option 'sn' (disable subtitle) with argument '1'.
Reading option '-sample_fmt' ... matched as option 'sample_fmt' (set sample format) with argument 's16'.
Reading option '-ac' ... matched as option 'ac' (set number of audio channels) with argument '1'.
Reading option '-threads' ... matched as AVOption 'threads' with argument '0'.
Reading option '-map_metadata' ... matched as option 'map_metadata' (set metadata information of outfile from infile) with argument '-1'.
Reading option 'low.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url input.mp4.
Successfully parsed a group of options.
Opening an input file: input.mp4.
[NULL @ 0x559fb7ecda40] Opening 'input.mp4' for reading
[file @ 0x559fb7ece4c0] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] ISO: File Type Major Brand: isom
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] Processing st: 0, edit list 0 - media time: 0, duration: 90
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] Processing st: 1, edit list 0 - media time: 1024, duration: 12106376
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] drop a frame at curr_cts: 0 @ 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] Before avformat_find_stream_info() pos: 48725 bytes read:65536 seeks:0 nb_streams:2
[h264 @ 0x559fb7ecf6c0] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0x559fb7ecf6c0] nal_unit_type: 8(PPS), nal_ref_idc: 3
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] demuxer injecting skip 1024 / discard 0
[aac @ 0x559fb7ed1180] skip 1024 / discard 0 samples due to side data
[h264 @ 0x559fb7ecf6c0] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 0x559fb7ecf6c0] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0x559fb7ecf6c0] Format yuvj420p chosen by get_format().
[h264 @ 0x559fb7ecf6c0] Reinit context to 480x368, pix_fmt: yuvj420p
[h264 @ 0x559fb7ecf6c0] no picture 
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559fb7ecda40] After avformat_find_stream_info() pos: 4059034 bytes read:98304 seeks:1 frames:46
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:04:34.55, start: 0.000000, bitrate: 122 kb/s
    Stream #0:0(und), 1, 1/90000: Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuvj420p(pc, left), 480x360 (480x368) [SAR 1:1 DAR 4:3], 0/1, 6375600 kb/s, 90k fps, 90k tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und), 45, 1/44100: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 120 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Successfully opened the file.
Parsing a group of options: output url low.mp4.
Applying option c:a (codec name) with argument libfdk_aac.
Applying option c:v (codec name) with argument libx264.
Applying option profile:v (set profile) with argument high.
Applying option vf (set video filters) with argument format=yuv420p.
Applying option sn (disable subtitle) with argument 1.
Applying option sample_fmt (set sample format) with argument s16.
Applying option ac (set number of audio channels) with argument 1.
Applying option map_metadata (set metadata information of outfile from infile) with argument -1.
Successfully parsed a group of options.
Opening an output file: low.mp4.
File 'low.mp4' already exists. Overwrite ? [y/N] y
[file @ 0x559fb7ef6e40] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 8 logical cores
[h264 @ 0x559fb7f2ee40] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0x559fb7f2ee40] nal_unit_type: 8(PPS), nal_ref_idc: 3
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[aac @ 0x559fb7ed3980] skip 1024 / discard 0 samples due to side data
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[graph_1_in_0_1 @ 0x559fb7f431c0] Setting 'time_base' to value '1/44100'
[graph_1_in_0_1 @ 0x559fb7f431c0] Setting 'sample_rate' to value '44100'
[graph_1_in_0_1 @ 0x559fb7f431c0] Setting 'sample_fmt' to value 'fltp'
[graph_1_in_0_1 @ 0x559fb7f431c0] Setting 'channel_layout' to value '0x3'
[graph_1_in_0_1 @ 0x559fb7f431c0] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x3
[format_out_0_1 @ 0x559fb8109140] Setting 'sample_fmts' to value 's16'
[format_out_0_1 @ 0x559fb8109140] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000'
[format_out_0_1 @ 0x559fb8109140] Setting 'channel_layouts' to value '0x4'
[format_out_0_1 @ 0x559fb8109140] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[AVFilterGraph @ 0x559fb7f3eb80] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto_resampler_0 @ 0x559fb810a000] [SWR @ 0x559fb810a380] Using fltp internally between filters
[auto_resampler_0 @ 0x559fb810a000] [SWR @ 0x559fb810a380] Matrix coefficients:
[auto_resampler_0 @ 0x559fb810a000] [SWR @ 0x559fb810a380] FC: FL:0.500000 FR:0.500000 
[auto_resampler_0 @ 0x559fb810a000] ch:2 chl:stereo fmt:fltp r:44100Hz -> ch:1 chl:mono fmt:s16 r:44100Hz
[libfdk_aac @ 0x559fb7ef7080] Note, the VBR setting is unsupported and only works with some parameter combinations
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 44 times
[h264 @ 0x559fb7f2ee40] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 0x559fb7f2ee40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0x559fb7f2ee40] Format yuvj420p chosen by get_format().
[h264 @ 0x559fb7f2ee40] Reinit context to 480x368, pix_fmt: yuvj420p
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 1 times
[h264 @ 0x559fb7f2ee40] no picture 
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 81 times
Too many packets buffered for output stream 0:1.
[AVIOContext @ 0x559fb7ed3780] Statistics: 0 seeks, 0 writeouts
[libfdk_aac @ 0x559fb7ef7080] 2 frames left in the queue on closing
[AVIOContext @ 0x559fb7ed6880] Statistics: 131072 bytes read, 2 seeks
Conversion failed!


  



  EDIT 2 :

  



  The original file is converted by online tool which uses ffmpeg also.
The source file was .mp3 with jpeg cover inside. But I wasn't able to simulate online tool's behavior = to convert cover to one-frame video.

  


• FFMPEG stuck at 00:00:00 speed=0x for a long time at the beginning

  4 juin 2020, par lagmoellertim

  I'm currently writing a script that can remove silence from any video. I'm doing this using ffmpeg and a complex_filter script.

  



  Since most of my videos are pretty long (>1.5h), ffmpeg is called multiple times with a different complex_filter, each editing a part of the video (about 8 minutes long each) and combining those parts at the end.

  



  The input file for all these separate parts is always the original 1.5h video clip.

  



  The problem I keep getting is that for videos starting not directly at the start (first part works fine, second part starting at minute 8 takes longer, third part starting at minute 16 even longer, ... you get the point), this shows up and gets displayed for quite a long time, until it finally works with its normal speed :

  



  frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x

  



  Here is the ffmpeg script I use

  



  ffmpeg -i video.mp4 -vsync 1 -async 1 -safe 0 -filter_complex_script /path/to/complex_filter -y -map '[vout]' -map '[aout]' video_parts/infb4_3.mp4

  



  I also tried adding -ss 00:24:00 before or behind the -i input, but I did not notice any speed improvement.

  



  And here the complex_filter of one part of the video, starting at minute 24 and ending at minute 32 :

  



  [0:v]trim=start=1440:end=1440.655,setpts=PTS-STARTPTS[v0];
[v0]setpts=0.1667*PTS[vf0];
[0:a]atrim=start=1440:end=1440.655,asetpts=PTS-STARTPTS[a0];
[a0]atempo=6.0,volume=0.5[af0];
[0:v]trim=start=1440.655:end=1442.745,setpts=PTS-STARTPTS[v1];
[0:a]atrim=start=1440.655:end=1442.745,asetpts=PTS-STARTPTS[a1];
[0:v]trim=start=1442.745:end=1443.115,setpts=PTS-STARTPTS[v2];
[v2]setpts=0.1667*PTS[vf2];
[0:a]atrim=start=1442.745:end=1443.115,asetpts=PTS-STARTPTS[a2];
[a2]atempo=6.0,volume=0.5[af2];
[0:v]trim=start=1443.115:end=1444.005,setpts=PTS-STARTPTS[v3];
[0:a]atrim=start=1443.115:end=1444.005,asetpts=PTS-STARTPTS[a3];
[0:v]trim=start=1444.005:end=1444.295,setpts=PTS-STARTPTS[v4];
[v4]setpts=0.1667*PTS[vf4];
[0:a]atrim=start=1444.005:end=1444.295,asetpts=PTS-STARTPTS[a4];
[a4]atempo=6.0,volume=0.5[af4];
[0:v]trim=start=1444.295:end=1449.925,setpts=PTS-STARTPTS[v5];
[0:a]atrim=start=1444.295:end=1449.925,asetpts=PTS-STARTPTS[a5];
[0:v]trim=start=1449.925:end=1450.295,setpts=PTS-STARTPTS[v6];
[v6]setpts=0.1667*PTS[vf6];
[0:a]atrim=start=1449.925:end=1450.295,asetpts=PTS-STARTPTS[a6];
[a6]atempo=6.0,volume=0.5[af6];
[0:v]trim=start=1450.295:end=1453.225,setpts=PTS-STARTPTS[v7];
[0:a]atrim=start=1450.295:end=1453.225,asetpts=PTS-STARTPTS[a7];
[0:v]trim=start=1453.225:end=1453.965,setpts=PTS-STARTPTS[v8];
[v8]setpts=0.1667*PTS[vf8];
[0:a]atrim=start=1453.225:end=1453.965,asetpts=PTS-STARTPTS[a8];
[a8]atempo=6.0,volume=0.5[af8];
[0:v]trim=start=1453.965:end=1458.755,setpts=PTS-STARTPTS[v9];
[0:a]atrim=start=1453.965:end=1458.755,asetpts=PTS-STARTPTS[a9];
[0:v]trim=start=1458.755:end=1459.815,setpts=PTS-STARTPTS[v10];
[v10]setpts=0.1667*PTS[vf10];
[0:a]atrim=start=1458.755:end=1459.815,asetpts=PTS-STARTPTS[a10];
[a10]atempo=6.0,volume=0.5[af10];
[0:v]trim=start=1459.815:end=1464.805,setpts=PTS-STARTPTS[v11];
[0:a]atrim=start=1459.815:end=1464.805,asetpts=PTS-STARTPTS[a11];
[0:v]trim=start=1464.805:end=1466.665,setpts=PTS-STARTPTS[v12];
[v12]setpts=0.1667*PTS[vf12];
[0:a]atrim=start=1464.805:end=1466.665,asetpts=PTS-STARTPTS[a12];
[a12]atempo=6.0,volume=0.5[af12];
[0:v]trim=start=1466.665:end=1469.615,setpts=PTS-STARTPTS[v13];
[0:a]atrim=start=1466.665:end=1469.615,asetpts=PTS-STARTPTS[a13];
[0:v]trim=start=1469.615:end=1470.075,setpts=PTS-STARTPTS[v14];
[v14]setpts=0.1667*PTS[vf14];
[0:a]atrim=start=1469.615:end=1470.075,asetpts=PTS-STARTPTS[a14];
[a14]atempo=6.0,volume=0.5[af14];
[0:v]trim=start=1470.075:end=1474.435,setpts=PTS-STARTPTS[v15];
[0:a]atrim=start=1470.075:end=1474.435,asetpts=PTS-STARTPTS[a15];
[0:v]trim=start=1474.435:end=1474.725,setpts=PTS-STARTPTS[v16];
[v16]setpts=0.1667*PTS[vf16];
[0:a]atrim=start=1474.435:end=1474.725,asetpts=PTS-STARTPTS[a16];
[a16]atempo=6.0,volume=0.5[af16];
[0:v]trim=start=1474.725:end=1476.765,setpts=PTS-STARTPTS[v17];
[0:a]atrim=start=1474.725:end=1476.765,asetpts=PTS-STARTPTS[a17];
[0:v]trim=start=1476.765:end=1479.525,setpts=PTS-STARTPTS[v18];
[v18]setpts=0.1667*PTS[vf18];
[0:a]atrim=start=1476.765:end=1479.525,asetpts=PTS-STARTPTS[a18];
[a18]atempo=6.0,volume=0.5[af18];
[0:v]trim=start=1479.525:end=1483.705,setpts=PTS-STARTPTS[v19];
[0:a]atrim=start=1479.525:end=1483.705,asetpts=PTS-STARTPTS[a19];
[0:v]trim=start=1483.705:end=1484.165,setpts=PTS-STARTPTS[v20];
[v20]setpts=0.1667*PTS[vf20];
[0:a]atrim=start=1483.705:end=1484.165,asetpts=PTS-STARTPTS[a20];
[a20]atempo=6.0,volume=0.5[af20];
[0:v]trim=start=1484.165:end=1485.605,setpts=PTS-STARTPTS[v21];
[0:a]atrim=start=1484.165:end=1485.605,asetpts=PTS-STARTPTS[a21];
[0:v]trim=start=1485.605:end=1486.315,setpts=PTS-STARTPTS[v22];
[v22]setpts=0.1667*PTS[vf22];
[0:a]atrim=start=1485.605:end=1486.315,asetpts=PTS-STARTPTS[a22];
[a22]atempo=6.0,volume=0.5[af22];
[0:v]trim=start=1486.315:end=1489.055,setpts=PTS-STARTPTS[v23];
[0:a]atrim=start=1486.315:end=1489.055,asetpts=PTS-STARTPTS[a23];
[0:v]trim=start=1489.055:end=1489.485,setpts=PTS-STARTPTS[v24];
[v24]setpts=0.1667*PTS[vf24];
[0:a]atrim=start=1489.055:end=1489.485,asetpts=PTS-STARTPTS[a24];
[a24]atempo=6.0,volume=0.5[af24];
[0:v]trim=start=1489.485:end=1491.375,setpts=PTS-STARTPTS[v25];
[0:a]atrim=start=1489.485:end=1491.375,asetpts=PTS-STARTPTS[a25];
[0:v]trim=start=1491.375:end=1491.955,setpts=PTS-STARTPTS[v26];
[v26]setpts=0.1667*PTS[vf26];
[0:a]atrim=start=1491.375:end=1491.955,asetpts=PTS-STARTPTS[a26];
[a26]atempo=6.0,volume=0.5[af26];
[0:v]trim=start=1491.955:end=1493.325,setpts=PTS-STARTPTS[v27];
[0:a]atrim=start=1491.955:end=1493.325,asetpts=PTS-STARTPTS[a27];
[0:v]trim=start=1493.325:end=1493.785,setpts=PTS-STARTPTS[v28];
[v28]setpts=0.1667*PTS[vf28];
[0:a]atrim=start=1493.325:end=1493.785,asetpts=PTS-STARTPTS[a28];
[a28]atempo=6.0,volume=0.5[af28];
[0:v]trim=start=1493.785:end=1498.195,setpts=PTS-STARTPTS[v29];
[0:a]atrim=start=1493.785:end=1498.195,asetpts=PTS-STARTPTS[a29];
[0:v]trim=start=1498.195:end=1498.935,setpts=PTS-STARTPTS[v30];
[v30]setpts=0.1667*PTS[vf30];
[0:a]atrim=start=1498.195:end=1498.935,asetpts=PTS-STARTPTS[a30];
[a30]atempo=6.0,volume=0.5[af30];
[0:v]trim=start=1498.935:end=1500.385,setpts=PTS-STARTPTS[v31];
[0:a]atrim=start=1498.935:end=1500.385,asetpts=PTS-STARTPTS[a31];
[0:v]trim=start=1500.385:end=1500.675,setpts=PTS-STARTPTS[v32];
[v32]setpts=0.1667*PTS[vf32];
[0:a]atrim=start=1500.385:end=1500.675,asetpts=PTS-STARTPTS[a32];
[a32]atempo=6.0,volume=0.5[af32];
[0:v]trim=start=1500.675:end=1503.665,setpts=PTS-STARTPTS[v33];
[0:a]atrim=start=1500.675:end=1503.665,asetpts=PTS-STARTPTS[a33];
[0:v]trim=start=1503.665:end=1504.675,setpts=PTS-STARTPTS[v34];
[v34]setpts=0.1667*PTS[vf34];
[0:a]atrim=start=1503.665:end=1504.675,asetpts=PTS-STARTPTS[a34];
[a34]atempo=6.0,volume=0.5[af34];
[0:v]trim=start=1504.675:end=1509.405,setpts=PTS-STARTPTS[v35];
[0:a]atrim=start=1504.675:end=1509.405,asetpts=PTS-STARTPTS[a35];
[0:v]trim=start=1509.405:end=1511.155,setpts=PTS-STARTPTS[v36];
[v36]setpts=0.1667*PTS[vf36];
[0:a]atrim=start=1509.405:end=1511.155,asetpts=PTS-STARTPTS[a36];
[a36]atempo=6.0,volume=0.5[af36];
[0:v]trim=start=1511.155:end=1518.295,setpts=PTS-STARTPTS[v37];
[0:a]atrim=start=1511.155:end=1518.295,asetpts=PTS-STARTPTS[a37];
[0:v]trim=start=1518.295:end=1520.185,setpts=PTS-STARTPTS[v38];
[v38]setpts=0.1667*PTS[vf38];
[0:a]atrim=start=1518.295:end=1520.185,asetpts=PTS-STARTPTS[a38];
[a38]atempo=6.0,volume=0.5[af38];
[0:v]trim=start=1520.185:end=1526.105,setpts=PTS-STARTPTS[v39];
[0:a]atrim=start=1520.185:end=1526.105,asetpts=PTS-STARTPTS[a39];
[0:v]trim=start=1526.105:end=1526.765,setpts=PTS-STARTPTS[v40];
[v40]setpts=0.1667*PTS[vf40];
[0:a]atrim=start=1526.105:end=1526.765,asetpts=PTS-STARTPTS[a40];
[a40]atempo=6.0,volume=0.5[af40];
[0:v]trim=start=1526.765:end=1528.765,setpts=PTS-STARTPTS[v41];
[0:a]atrim=start=1526.765:end=1528.765,asetpts=PTS-STARTPTS[a41];
[0:v]trim=start=1528.765:end=1529.255,setpts=PTS-STARTPTS[v42];
[v42]setpts=0.1667*PTS[vf42];
[0:a]atrim=start=1528.765:end=1529.255,asetpts=PTS-STARTPTS[a42];
[a42]atempo=6.0,volume=0.5[af42];
[0:v]trim=start=1529.255:end=1531.465,setpts=PTS-STARTPTS[v43];
[0:a]atrim=start=1529.255:end=1531.465,asetpts=PTS-STARTPTS[a43];
[0:v]trim=start=1531.465:end=1531.955,setpts=PTS-STARTPTS[v44];
[v44]setpts=0.1667*PTS[vf44];
[0:a]atrim=start=1531.465:end=1531.955,asetpts=PTS-STARTPTS[a44];
[a44]atempo=6.0,volume=0.5[af44];
[0:v]trim=start=1531.955:end=1533.535,setpts=PTS-STARTPTS[v45];
[0:a]atrim=start=1531.955:end=1533.535,asetpts=PTS-STARTPTS[a45];
[0:v]trim=start=1533.535:end=1533.955,setpts=PTS-STARTPTS[v46];
[v46]setpts=0.1667*PTS[vf46];
[0:a]atrim=start=1533.535:end=1533.955,asetpts=PTS-STARTPTS[a46];
[a46]atempo=6.0,volume=0.5[af46];
[0:v]trim=start=1533.955:end=1535.275,setpts=PTS-STARTPTS[v47];
[0:a]atrim=start=1533.955:end=1535.275,asetpts=PTS-STARTPTS[a47];
[0:v]trim=start=1535.275:end=1536.015,setpts=PTS-STARTPTS[v48];
[v48]setpts=0.1667*PTS[vf48];
[0:a]atrim=start=1535.275:end=1536.015,asetpts=PTS-STARTPTS[a48];
[a48]atempo=6.0,volume=0.5[af48];
[0:v]trim=start=1536.015:end=1539.725,setpts=PTS-STARTPTS[v49];
[0:a]atrim=start=1536.015:end=1539.725,asetpts=PTS-STARTPTS[a49];
[0:v]trim=start=1539.725:end=1540.935,setpts=PTS-STARTPTS[v50];
[v50]setpts=0.1667*PTS[vf50];
[0:a]atrim=start=1539.725:end=1540.935,asetpts=PTS-STARTPTS[a50];
[a50]atempo=6.0,volume=0.5[af50];
[0:v]trim=start=1540.935:end=1543.765,setpts=PTS-STARTPTS[v51];
[0:a]atrim=start=1540.935:end=1543.765,asetpts=PTS-STARTPTS[a51];
[0:v]trim=start=1543.765:end=1544.145,setpts=PTS-STARTPTS[v52];
[v52]setpts=0.1667*PTS[vf52];
[0:a]atrim=start=1543.765:end=1544.145,asetpts=PTS-STARTPTS[a52];
[a52]atempo=6.0,volume=0.5[af52];
[0:v]trim=start=1544.145:end=1545.775,setpts=PTS-STARTPTS[v53];
[0:a]atrim=start=1544.145:end=1545.775,asetpts=PTS-STARTPTS[a53];
[0:v]trim=start=1545.775:end=1546.035,setpts=PTS-STARTPTS[v54];
[v54]setpts=0.1667*PTS[vf54];
[0:a]atrim=start=1545.775:end=1546.035,asetpts=PTS-STARTPTS[a54];
[a54]atempo=6.0,volume=0.5[af54];
[0:v]trim=start=1546.035:end=1547.455,setpts=PTS-STARTPTS[v55];
[0:a]atrim=start=1546.035:end=1547.455,asetpts=PTS-STARTPTS[a55];
[0:v]trim=start=1547.455:end=1547.775,setpts=PTS-STARTPTS[v56];
[v56]setpts=0.1667*PTS[vf56];
[0:a]atrim=start=1547.455:end=1547.775,asetpts=PTS-STARTPTS[a56];
[a56]atempo=6.0,volume=0.5[af56];
[0:v]trim=start=1547.775:end=1550.145,setpts=PTS-STARTPTS[v57];
[0:a]atrim=start=1547.775:end=1550.145,asetpts=PTS-STARTPTS[a57];
[0:v]trim=start=1550.145:end=1550.785,setpts=PTS-STARTPTS[v58];
[v58]setpts=0.1667*PTS[vf58];
[0:a]atrim=start=1550.145:end=1550.785,asetpts=PTS-STARTPTS[a58];
[a58]atempo=6.0,volume=0.5[af58];
[0:v]trim=start=1550.785:end=1555.925,setpts=PTS-STARTPTS[v59];
[0:a]atrim=start=1550.785:end=1555.925,asetpts=PTS-STARTPTS[a59];

... shortened so that stackoverflow accepts it ...

[0:v]trim=start=1893.715:end=1897.605,setpts=PTS-STARTPTS[v181];
[0:a]atrim=start=1893.715:end=1897.605,asetpts=PTS-STARTPTS[a181];
[0:v]trim=start=1897.605:end=1898.025,setpts=PTS-STARTPTS[v182];
[v182]setpts=0.1667*PTS[vf182];
[0:a]atrim=start=1897.605:end=1898.025,asetpts=PTS-STARTPTS[a182];
[a182]atempo=6.0,volume=0.5[af182];
[0:v]trim=start=1898.025:end=1900.455,setpts=PTS-STARTPTS[v183];
[0:a]atrim=start=1898.025:end=1900.455,asetpts=PTS-STARTPTS[a183];
[0:v]trim=start=1900.455:end=1903.985,setpts=PTS-STARTPTS[v184];
[v184]setpts=0.1667*PTS[vf184];
[0:a]atrim=start=1900.455:end=1903.985,asetpts=PTS-STARTPTS[a184];
[a184]atempo=6.0,volume=0.5[af184];
[0:v]trim=start=1903.985:end=1908.195,setpts=PTS-STARTPTS[v185];
[0:a]atrim=start=1903.985:end=1908.195,asetpts=PTS-STARTPTS[a185];
[0:v]trim=start=1908.195:end=1908.455,setpts=PTS-STARTPTS[v186];
[v186]setpts=0.1667*PTS[vf186];
[0:a]atrim=start=1908.195:end=1908.455,asetpts=PTS-STARTPTS[a186];
[a186]atempo=6.0,volume=0.5[af186];
[0:v]trim=start=1908.455:end=1911.655,setpts=PTS-STARTPTS[v187];
[0:a]atrim=start=1908.455:end=1911.655,asetpts=PTS-STARTPTS[a187];
[0:v]trim=start=1911.655:end=1916.495,setpts=PTS-STARTPTS[v188];
[v188]setpts=0.1667*PTS[vf188];
[0:a]atrim=start=1911.655:end=1916.495,asetpts=PTS-STARTPTS[a188];
[a188]atempo=6.0,volume=0.5[af188];
[0:v]trim=start=1916.495:end=1920,setpts=PTS-STARTPTS[v189];
[0:a]atrim=start=1916.495:end=1920,asetpts=PTS-STARTPTS[a189];
[vf0][af0][v1][a1][vf2][af2][v3][a3][vf4][af4][v5][a5][vf6][af6][v7][a7][vf8][af8][v9][a9][vf10][af10][v11][a11][vf12][af12][v13][a13][vf14][af14][v15][a15][vf16][af16][v17][a17][vf18][af18][v19][a19][vf20][af20][v21][a21][vf22][af22][v23][a23][vf24][af24][v25][a25][vf26][af26][v27][a27][vf28][af28][v29][a29] ... shortened here so that stackoverflow accepts it ... [v181][a181][vf182][af182][v183][a183][vf184][af184][v185][a185][vf186][af186][v187][a187][vf188][af188][v189][a189]concat=n=190:v=1:a=1[vout][aout]


  



  Thanks !