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• ffmpeg Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  24 septembre 2015, par and93hil

  So I am getting some errors wehn concerting with ffmpeg, here is the complete output, what have i specified wrongly ?

  command

  /usr/bin/ffmpeg -i /home/user/144310492683541.avi -vcodec flv -acodec libmp3lame -s 854x480 -preset medium -f mp4 -b:v 512000 -minrate 512000 -maxrate 512000 -b:a 128000 -minrate 128000 -maxrate 128000 -r 25 -ar 22050 /home/user/files/videos/2015/09/24/144310492683541.mp4

  ffmpeg output

  ffmpeg version N-74748-gbaeb8f5 Copyright (c) 2000-2015 the FFmpeg developers
  
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
  
  libavutil 54. 31.100 / 54. 31.100
  
  libavcodec 56. 59.100 / 56. 59.100
  
  libavformat 56. 40.101 / 56. 40.101
  
  libavdevice 56. 4.100 / 56. 4.100
  
  libavfilter 5. 40.100 / 5. 40.100
  
  libavresample 2. 1. 0 / 2. 1. 0
  
  libswscale 3. 1.101 / 3. 1.101
  
  libswresample 1. 2.101 / 1. 2.101
  
  libpostproc 53. 3.100 / 53. 3.100
  
  Input #0, avi, from '/home/user/144310492683541.avi':
  
  Metadata:
  
  encoder : Lavf56.22.100
  
  Duration: 00:01:36.13, start: 0.000000, bitrate: 3447 kb/s
  
  Stream #0:0: Video: mpeg4 (Simple Profile) (DIVX / 0x58564944), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 3871 kb/s, 30 fps, 30 tbr, 30 tbn, 30 tbc
  
  Stream #0:1: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 44100 Hz, stereo, fltp, 11 kb/s
  
  Codec AVOption preset (Set the encoding preset (cf. x264 --fullhelp)) specified for output file #0 (/home/user/files/videos/2015/09/24/144310492683541.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
  
  [flv @ 0x2d74100] Either both buffer size and max rate or neither must be specified
  
  Output #0, mp4, to '/home/user/files/videos/2015/09/24/144310492683541.mp4':
  
  Metadata:
  
  encoder : Lavf56.22.100
  
  Stream #0:0: Video: flv1, none, q=2-31, 128 kb/s, SAR 1280:1281 DAR 0:0, 25 fps
  
  Metadata:
  
  encoder : Lavc56.59.100 flv
  
  Stream #0:1: Audio: mp3, 0 channels, 128 kb/s
  
  Metadata:
  
  encoder : Lavc56.59.100 libmp3lame
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (mpeg4 (native) -> flv1 (flv))
  
  Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame))
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

• ffmpeg : how to correctly program input framerate calculation, given desired video length duration and output framerate ?

  19 septembre 2015, par user89

  Let us say that I have n pictures named as imgXY.png (where XY represent the numbers 0 to n-1, properly padded with zeros).

  From these, I would like to create a video that is t seconds long, that has an (output) framerate R.

  I want to figure out what the input framerate should be, so I do the following calculation :

  • time spent per frame : t_per_frame = t/n

  • input framerate : 1/t_per_frame = n/t

  However, when I then try to create a movie using the following command :

  ffmpeg -framerate n/t -i img%02d.png -r 30 test_output.mp4

  I don’t get a movie that is t seconds long, and only two of the frames end up getting displayed. Why is this the case ?

  The following questions were unhelpful :

  How to successfully use ffmpeg to convert images into videos

  Turning images into videos with ffmpeg

  I think I am misunderstanding what is meant by input framerate, and what is meant by output framerate. Could you help clarify ? I am using a Python script to call ffmpeg, as documented here : http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/

  Here’s the output from the following manually executed command :

  ffmpeg -framerate 24/5 -i img%02d.png -c:v libx264 -r 30 -pix_fmt yuv420p test_output.mp4

  ffmpeg version N-75204-g314bc20 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
  
  enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-l
  
  ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab
  
  le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
  
  able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --ena
  
  ble-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc
  
   --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enabl
  
  e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena
  
  ble-decklink --enable-opencl --enable-zlib
  
    libavutil      55.  2.100 / 55.  2.100
  
    libavcodec     57.  1.100 / 57.  1.100
  
    libavformat    57.  0.100 / 57.  0.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6.  1.100 /  6.  1.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.100 /  2.  0.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, image2, from 'img%02d.png':
  
    Duration: 00:00:00.42, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: png, rgb24(pc), 800x400, 4.80 tbr, 4.80 tbn, 4.80 tbc
  
  File 'test_output.mp4' already exists. Overwrite ? [y/N] y
  
  [libx264 @ 0000000004f16ba0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0000000004f16ba0] profile High, level 3.0
  
  [libx264 @ 0000000004f16ba0] 264 - core 148 r2597 e86f3a1 - H.264/MPEG-4 AVC cod
  
  ec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 r
  
  ef=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_pski
  
  p=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 dec
  
  imate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b
  
  _adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=
  
  25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.
  
  60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'test_output.mp4':
  
    Metadata:
  
      encoder         : Lavf57.0.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 800x40
  
  0, q=-1--1, 30 fps, 15360 tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc57.1.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=   12 fps=0.0 q=-1.0 Lsize=       3kB time=00:00:00.33 bitrate=  62.2kbits
  
  /s dup=10 drop=0
  
  video:2kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ove
  
  rhead: 60.557274%
  
  [libx264 @ 0000000004f16ba0] frame I:1     Avg QP:10.12  size:   566
  
  [libx264 @ 0000000004f16ba0] frame P:3     Avg QP:18.10  size:    62
  
  [libx264 @ 0000000004f16ba0] frame B:8     Avg QP:13.75  size:    22
  
  [libx264 @ 0000000004f16ba0] consecutive B-frames:  8.3%  0.0% 25.0% 66.7%
  
  [libx264 @ 0000000004f16ba0] mb I  I16..4: 99.4%  0.0%  0.6%
  
  [libx264 @ 0000000004f16ba0] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%  0.0
  
  %  0.0%  0.0%  0.0%    skip:99.9%
  
  [libx264 @ 0000000004f16ba0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0
  
  %  0.0%  direct: 0.0%  skip:99.9%  L0:37.5% L1:62.5% BI: 0.0%
  
  [libx264 @ 0000000004f16ba0] 8x8 transform intra:0.0% inter:0.0%
  
  [libx264 @ 0000000004f16ba0] coded y,uvDC,uvAC intra: 0.6% 0.0% 0.0% inter: 0.0%
  
   0.0% 0.0%
  
  [libx264 @ 0000000004f16ba0] i16 v,h,dc,p: 96%  0%  4%  0%
  
  [libx264 @ 0000000004f16ba0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 18% 36%  2%  2%
  
   3%  3%  5%  1%
  
  [libx264 @ 0000000004f16ba0] i8c dc,h,v,p: 100%  0%  0%  0%
  
  [libx264 @ 0000000004f16ba0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0000000004f16ba0] ref P L0: 50.0% 50.0%
  
  [libx264 @ 0000000004f16ba0] kb/s:18.50

• ffmpeg mp4 fade output appears faulty [duplicate]

  19 septembre 2015, par DaveTheRave

  This question already has an answer here :

  • creating Chrome compatible .mp4 with ffmpeg from commandline
    
    1 answer
    

  I can add a fade in and out to an existing MP4 with the following command and it works perfectly (from and to black) - it plays in all browsers and a range of Android devices

  ffmpeg -i phpF21_i_v.mp4 -vf "fade=in:1:30, fade=out:st=4:d=1.0" -y phpF21_i_final.mp4 >phpF21_i_f.log 2>&1

  But if I try to fade from and to white, the following command doesn’t work - it only plays in Chrome - no other browser - not on Android

  ffmpeg -i phpF21_i_v.mp4 -vf "fade=in:1:30:color=white, fade=out:st=4:d=1.0:color=white" -y phpF21_i_final.mp4 >phpF21_i_f.log 2>&1

  Am I missing something obvious ?

  Cheers

  Dave

  The ffmpeg log when if fails :

  `

  ffmpeg version N-72298-g02cf59f Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 23.101 / 54. 23.101
  
    libavcodec     56. 40.100 / 56. 40.100
  
    libavformat    56. 33.101 / 56. 33.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'phpF21_i_v.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.33.101
  
    Duration: 00:00:05.00, start: 0.000000, bitrate: 910 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 906 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  No pixel format specified, yuv444p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264 @ 00000000055144c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 00000000055144c0] profile High 4:4:4 Predictive, level 4.0, 4:4:4 8-bit
  
  [libx264 @ 00000000055144c0] 264 - core 146 r2538 121396c - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=9 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'phpF21_i_final.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.33.101
  
      Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 1920x1080, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc56.40.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=   16 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
  
  frame=   35 fps= 34 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
  
  frame=   47 fps= 25 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A    
  
  frame=   55 fps= 23 q=28.0 size=       1kB time=00:00:00.00 bitrate=N/A    
  
  frame=   64 fps= 21 q=28.0 size=     154kB time=00:00:00.36 bitrate=3502.7kbits/s    
  
  frame=   74 fps= 21 q=28.0 size=     427kB time=00:00:00.76 bitrate=4600.5kbits/s    
  
  frame=   87 fps= 21 q=28.0 size=     746kB time=00:00:01.28 bitrate=4776.4kbits/s    
  
  frame=  107 fps= 23 q=28.0 size=     814kB time=00:00:02.08 bitrate=3206.4kbits/s    
  
  frame=  125 fps= 24 q=28.0 size=     836kB time=00:00:02.80 bitrate=2446.0kbits/s    
  
  frame=  125 fps= 21 q=-1.0 Lsize=     876kB time=00:00:04.92 bitrate=1458.0kbits/s    
  
  video:873kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.253249%
  
  [libx264 @ 00000000055144c0] frame I:2     Avg QP:15.56  size:  9114
  
  [libx264 @ 00000000055144c0] frame P:39    Avg QP:18.53  size: 21193
  
  [libx264 @ 00000000055144c0] frame B:84    Avg QP:17.81  size:   582
  
  [libx264 @ 00000000055144c0] consecutive B-frames:  8.8%  4.8%  0.0% 86.4%
  
  [libx264 @ 00000000055144c0] mb I  I16..4: 17.0% 82.3%  0.7%
  
  [libx264 @ 00000000055144c0] mb P  I16..4:  2.8%  4.7%  0.2%  P16..4: 17.6%  2.9%  2.7%  0.0%  0.0%    skip:69.1%
  
  [libx264 @ 00000000055144c0] mb B  I16..4:  0.2%  0.2%  0.0%  B16..8:  5.1%  0.0%  0.0%  direct: 0.0%  skip:94.4%  L0:15.6% L1:54.1% BI:30.3%
  
  [libx264 @ 00000000055144c0] 8x8 transform intra:68.2% inter:64.0%
  
  [libx264 @ 00000000055144c0] coded y,u,v intra: 18.5% 6.4% 6.4% inter: 3.7% 1.6% 1.7%
  
  [libx264 @ 00000000055144c0] i16 v,h,dc,p: 20% 45%  7% 28%
  
  [libx264 @ 00000000055144c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 19% 49%  2%  2%  2%  3%  1%  3%
  
  [libx264 @ 00000000055144c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 27% 33%  4%  6%  3%  6%  3%  4%
  
  [libx264 @ 00000000055144c0] Weighted P-Frames: Y:53.8% UV:53.8%
  
  [libx264 @ 00000000055144c0] ref P L0: 72.5% 14.0%  8.7%  4.8%  0.0%
  
  [libx264 @ 00000000055144c0] ref B L0: 39.9% 48.3% 11.7%
  
  [libx264 @ 00000000055144c0] ref B L1: 95.8%  4.2%
  
  [libx264 @ 00000000055144c0] kb/s:1429.90

  `