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• How to concate videos which some have audio and some haven't audio in FFMPEG [duplicate]

  21 juin 2019, par Nikunj Paradva

  This question already has an answer here :

  • FFmpeg : concat multiple videos, some with audio, some without
    
    1 answer
    
  • FFmpeg concatenation, no Audio in Final Output
    
    1 answer
    

  What i am doing :->

  I am currently concat videos using FFMPEG. while selecting input videos I don’t know videos have audio stream or not. then i concate that videos with this command which is written below,

  I got this error because of one input have no sound stream

  What i have to do :->

  • how to check that input video have audio or not ?
  • how to concate this video inputs ?(one with audio another with no audio)
  • if possible all this thing in single command ?

  FFMPEG Command :-

   [-y,
  
     -i, /storage/emulated/0/Received/MP4_20190220_114210.mp4,
  
     -i, /storage/emulated/0/Received/VID-20190404-WA0010.mp4,
  
     -strict, experimental,
  
     -filter_complex, [0:v]scale=iw*min(854/iw\,480/ih):ih*min(854/iw\,480/ih), pad=854:480:(854-iw*min(854/iw\,480/ih))/2:(480-ih*min(854/iw\,480/ih))/2,setsar=1:1[v0];
  
                      [1:v]scale=iw*min(854/iw\,480/ih):ih*min(854/iw\,480/ih), pad=854:480:(854-iw*min(854/iw\,480/ih))/2:(480-ih*min(854/iw\,480/ih))/2,setsar=1:1[v1];
  
                      [v0][0:a][v1][1:a] concat=n=2:v=1:a=1,
  
     -preset, ultrafast,
  
     /storage/emulated/0/Video/Video_1561115811161.mp4]

  I got this Error While Executing.

  ffmpeg version n4.0-39-gda39990 Copyright (c) 2000-2018 the FFmpeg developers
  
        built with gcc 4.9.x (GCC) 20150123 (prerelease)
  
        configuration: --target-os=linux --cross-prefix=/root/bravobit/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/root/bravobit/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-ffprobe --enable-libopus --enable-libvorbis --enable-libfdk-aac --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-libvpx --enable-libass --enable-yasm --enable-pthreads --disable-debug --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-linux-perf --disable-doc --disable-shared --enable-static --enable-runtime-cpudetect --enable-nonfree --enable-network --enable-avresample --enable-avformat --enable-avcodec --enable-indev=lavfi --enable-hwaccels --enable-ffmpeg --enable-zlib --enable-gpl --enable-small --enable-nonfree --pkg-config=pkg-config --pkg-config-flags=--static --prefix=/root/bravobit/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/root/bravobit/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/root/bravobit/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-cxxflags=
  
        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
  
        libavresample   4.  0.  0 /  4.  0.  0
  
        libswscale      5.  1.100 /  5.  1.100
  
        libswresample   3.  1.100 /  3.  1.100
  
        libpostproc    55.  1.100 / 55.  1.100
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Received/MP4_20190220_114210.mp4':
  
        Metadata:
  
          major_brand     : iso6
  
          minor_version   : 1
  
          compatible_brands: mp42iso6avc1isom
  
          creation_time   : 2019-02-20T06:12:15.000000Z
  
        Duration: 00:00:23.46, start: 0.000000, bitrate: 309 kb/s
  
          Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 426x426, 243 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
  
          Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 32000 Hz, stereo, fltp, 64 kb/s (default)
  
      Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Received/VID-20190404-WA0010.mp4':
  
        Metadata:
  
          major_brand     : mp42
  
          minor_version   : 1
  
          compatible_brands: mp41mp42isom
  
          creation_time   : 2018-11-24T20:20:48.000000Z
  
        Duration: 00:00:59.51, start: 0.066667, bitrate: 649 kb/s
  
          Stream #1:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 640x640, 646 kb/s, 29.98 fps, 30 tbr, 15360 tbn, 60 tbc (default)
  
          Metadata:
  
            creation_time   : 2018-11-24T20:20:48.000000Z
  
            handler_name    : Core Media Video
  
      Stream specifier ':a' in filtergraph description [0:v]scale=iw*min(854/iw\,480/ih):ih*min(854/iw\,480/ih), pad=854:480:(854-iw*min(854/iw\,480/ih))/2:(480-ih*min(854/iw\,480/ih))/2,setsar=1:1[v0];[1:v]scale=iw*min(854/iw\,480/ih):ih*min(854/iw\,480/ih), pad=854:480:(854-iw*min(854/iw\,480/ih))/2:(480-ih*min(854/iw\,480/ih))/2,setsar=1:1[v1];[v0][0:a][v1][1:a] concat=n=2:v=1:a=1 matches no streams.

  Your help would be appreciated.

• What is causing "unspecified pixel format" and "Error opening filters !" error in ffmpeg ?

  19 février 2019, par SJAndersonLA

  I’m writing an mp4 to HLS transcoding process that works as intended on files smaller than 7 gigabytes (sample size is 100 videos). When attempting to transcode anything larger than 7GB, it crashes.

  The command :

  ffmpeg 
  
    -i large_file.mp4 -y 
  
    -vf scale=w=1920:h=1080:force_original_aspect_ratio=decrease 
  
    -c:a aac 
  
    -ar 48000 
  
    -c:v h264 
  
    -profile:v main 
  
    -crf 20 
  
    -sc_threshold 0 
  
    -g 48 
  
    -keyint_min 48 
  
    -hls_time 4 
  
    -hls_playlist_type vod 
  
    -b:v 5000k 
  
    -maxrate 5350k 
  
    -bufsize 7500k 
  
    -b:a 192k 
  
    -hls_segment_filename /1080p_%03d.ts 
  
    -threads 0 
  
    /tmp/output-ef42dc65-1d3d-4682-b32b-68d7c712fb9c-raw-test/1080p.m3u8

  The error :

  ffmpeg version 3.2.12-1\x7edeb9u1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x555888d821c0] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1280x720, 3856 kb/s): unspecified pixel format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'large_file.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.26.101
  
    Duration: 05:56:12.51, start: 0.000000, bitrate: 4061 kb/s
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), none, 1280x720, 3856 kb/s, 29.99 fps, 30 tbr, 100k tbn, 200k tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 194 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [buffer @ 0x555888d88180] Unable to parse option value "-1" as pixel format
  
      Last message repeated 1 times
  
  [buffer @ 0x555888d88180] Error setting option pix_fmt to value -1.
  
  [graph 0 input from stream 0:0 @ 0x555888d81e40] Error applying options to the filter.
  
  Error opening filters!

  The error says to try increasing analyzeduration and probesize, which I set to max value (based on an answer from this post), however that didn’t seem to change the behavior. I also suspected that the file was corrupted, but the fact that this is failing for all files larger than 7GB makes it more difficult to suggest its something not related to the size of the mp4.

• ffmpeg bitrate won't change despite argument [duplicate]

  5 février 2019, par Dillon Wright

  This question already has an answer here :

  • Wav audio file compression not working
    
    2 answers
    

  I am attempting to change the codec a wav file is encoded in to do this i am using ffmpeg however when i do this conversion it sets the bit-rate to 128k and i cannot set it lower then this

  i have already tried to set the bit-rate using the b:a 8k argument however it does not change the output bit rate i have then tried to modify the sample and it does change this change also affects the bit rate.

  I have also tried changing the audio codec this has resulted in a lower bit-rate as well it also makes me suspect some codecs may have a minimum bit rate at least they have different default bit rates.

  C :/ffmpeg.exe -i "input.wav" -ar 8000 -b:a 8000 -c pcm_u8 "output.wav"

  here is the output debugging i get

  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20181017
  libavutil 56. 22.100 / 56. 22.100
  libavcodec 58. 35.100 / 58. 35.100
  libavformat 58. 20.100 / 58. 20.100
  libavdevice 58. 5.100 / 58. 5.100
  libavfilter 7. 40.101 / 7. 40.101
  libswscale 5. 3.100 / 5. 3.100
  libswresample 3. 3.100 / 3. 3.100
  libpostproc 55. 3.100 / 55. 3.100
  Guessed Channel Layout for Input Stream #0.0 : mono
  Input #0, wav, from ’input.wav’ :
  Duration : 00:21:03.08, bitrate : 8 kb/s
  Stream #0:0 : Audio : g729 ([131][0][0][0] / 0x0083), 8000 Hz, mono, s16, 8 kb/s
  Stream mapping : Stream #0:0 -> #0:0 (g729 (native) -> pcm_u8 (native))
  Output #0, wav, to ’output.wav’ :
  Metadata :
  ISFT : Lavf58.20.100
  Stream #0:0 : Audio : pcm_u8 ([1][0][0][0] / 0x0001), 8000 Hz, mono, u8, 64 kb/s
  Metadata :
  encoder : Lavc58.35.100 pcm_u8
  size= 2304kB time=00:05:10.59 bitrate= 60.8kbits/s speed= 621x
  size= 4864kB time=00:10:38.10 bitrate= 62.4kbits/s speed= 638x
  size= 7680kB time=00:16:23.05 bitrate= 64.0kbits/s speed= 637x
  size= 9868kB time=00:21:03.08 bitrate= 64.0kbits/s speed= 630x
  video:0kB audio:9868kB subtitle:0kB other streams:0kB global headers:0kB >muxing overhead : 0.000772