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• Extracting a clip from a video with low fps

  1er juin 2016, par superMind

  I want to extract a clip from a video( downloaded from [1]) (which has low frame rate) by specifying the start and end time. In order to do that, I use the following command :

  ffmpeg -i example.webm -ss 116.38 -to 126.38 clip.mpg

  however, I get the following error :

  ---

  ffmpeg version N-80026-g936751b Copyright (c) 2000-2016 the FFmpeg developers
  
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --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-libfreetype --enable-gnutls --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-libvidstab
  
  libavutil 55. 24.100 / 55. 24.100
  
  libavcodec 57. 42.100 / 57. 42.100
  
  libavformat 57. 36.100 / 57. 36.100
  
  libavdevice 57. 0.101 / 57. 0.101
  
  libavfilter 6. 45.100 / 6. 45.100
  
  libavresample 3. 0. 0 / 3. 0. 0
  
  libswscale 4. 1.100 / 4. 1.100
  
  libswresample 2. 0.101 / 2. 0.101
  
  libpostproc 54. 0.100 / 54. 0.100
  
  Input #0, matroska,webm, from 'example.webm':
  
  Metadata:
  
  encoder : Google
  
  Duration: 00:04:22.29, start: 0.000000, bitrate: 207 kb/s
  
  Stream #0:0: Video: vp8, yuv420p, 630x360, SAR 1:1 DAR 7:4, 6 fps, 6 tbr, 1k tbn (default)
  
  Stream #0:1: Audio: vorbis, 44100 Hz, stereo, fltp (default)
  
  [mpeg1video @ 0x252f200] MPEG1/2 does not support 5/1 fps
  
  Output #0, mpeg, to 'clip.mpg':
  
  Metadata:
  
  encoder : Google
  
  Stream #0:0: Unknown: none, SAR 1:1 DAR 0:0 (default)
  
  Metadata:
  
  encoder : Lavc57.42.100 mpeg1video
  
  Stream #0:1: Unknown: none (default)
  
  Metadata:
  
  encoder : Lavc57.42.100 mp2
  
  Stream mapping:
  
  Stream #0:0 -> #0:0 (vp8 (native) -> mpeg1video (native))
  
  Stream #0:1 -> #0:1 (vorbis (native) -> mp2 (native))
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  -----------------------------------------------------

  I tried by adding -r 20 to the above command. It works in this case but not sure this is correct way to do it.
  I was wondering how can I extract the clip from this video given start time and endtime ? what are parameters should I use ? or what is correct way to do it ?

  Thanks.

  [1]https://www.youtube.com/watch?v=Yc52pGHr0xc

• FFMPEG : Error initializing complex filters. Invalid argument

  20 mai 2016, par user3345889

  i run following command to create animated slide show but i got error

  String path = Environment.getExternalStorageDirectory() + "/";
  
  
  
  -framerate 60 -loop 1 -t 1 -i "+path+"images_001.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_002.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_003.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_004.jpg -framerate 60 -loop 1 -t 1 -i "+path+"images_005.jpg -filter_complex [1:v][0:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b1v]; [2:v][1:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b2v]; [3:v][2:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b3v]; [4:v][3:v]blend=all_expr='A*(if(gte(T,0.5),1,T/0.5))+B*(1-(if(gte(T,0.5),1,T/0.5)))'[b4v]; [0:v][b1v][1:v][b2v][2:v][b3v][3:v][b4v][4:v]concat=n=9:v=1:a=0;format=yuv420p;scale=480:270[vx] -map [vx] -vsync 0 -c:v libx264 -crf 35 "+path+"preview_270p.mp4

  output :

  FAILED with output : ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (GCC)
  
    configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [mjpeg @ 0xb86fe040] Changing bps to 8
  
  Input #0, image2, from '/storage/emulated/0/images_001.jpg':
  
    Duration: 00:00:00.02, start: 0.000000, bitrate: 542987 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1440x2560, 60 fps, 60 tbr, 60 tbn, 60 tbc
  
  [mjpeg @ 0xb8708360] Changing bps to 8
  
  Input #1, image2, from '/storage/emulated/0/images_002.jpg':
  
    Duration: 00:00:00.02, start: 0.000000, bitrate: 1011478 kb/s
  
      Stream #1:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2340x4160, 60 fps, 60 tbr, 60 tbn, 60 tbc
  
  [mjpeg @ 0xb870de00] Changing bps to 8
  
  Input #2, image2, from '/storage/emulated/0/images_003.jpg':
  
    Duration: 00:00:00.02, start: 0.000000, bitrate: 1022909 kb/s
  
      Stream #2:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2340x4160, 60 fps, 60 tbr, 60 tbn, 60 tbc
  
  [mjpeg @ 0xb870a170] Changing bps to 8
  
  Input #3, image2, from '/storage/emulated/0/images_004.jpg':
  
    Duration: 00:00:00.02, start: 0.000000, bitrate: 601309 kb/s
  
      Stream #3:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1440x2560, 60 fps, 60 tbr, 60 tbn, 60 tbc
  
  [mjpeg @ 0xb86ff290] Changing bps to 8
  
  Input #4, image2, from '/storage/emulated/0/images_005.jpg':
  
    Duration: 00:00:00.02, start: 0.000000, bitrate: 950450 kb/s
  
      Stream #4:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2340x4160, 60 fps, 60 tbr, 60 tbn, 60 tbc
  
  [AVFilterGraph @ 0xb8708bc0] No such filter: ''
  
  Error initializing complex filters.
  
  Invalid argument

• ffmpeg Videos Won't Play Centos

  17 mai 2016, par Dan

  My exported videos from ffmpeg won’t play on anything. I am trying to create a simple slideshow type video from images. It will create the video, the video will add 5 seconds in duration for each image I add but it just doesn’t play on anything. It’s driving me crazy.

  /usr/local/bin/ffmpeg -y -f image2 -r 1/5 -i uploads/img%03d.jpg vid/video.mp4

  And here is the output :

  Array ( [0] => ffmpeg version n2.8.7 Copyright (c) 2000-2016 the FFmpeg developers [1] => built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16) [2] => configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-x11grab --enable-libvpx --enable-libmp3lame [3] => libavutil 54. 31.100 / 54. 31.100 [4] => libavcodec 56. 60.100 / 56. 60.100 [5] => libavformat 56. 40.101 / 56. 40.101 [6] => libavdevice 56. 4.100 / 56. 4.100 [7] => libavfilter 5. 40.101 / 5. 40.101 [8] => libswscale 3. 1.101 / 3. 1.101 [9] => libswresample 1. 2.101 / 1. 2.101 [10] => libpostproc 53. 3.100 / 53. 3.100 [11] => [mjpeg @ 0x4213ac0] Changeing bps to 8 [12] => Input #0, image2, from 'uploads/img%03d.jpg': [13] => Duration: 00:00:05.00, start: 0.000000, bitrate: N/A [14] => Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 2021x1117 [SAR 100:100 DAR 2021:1117], 0.20 tbr, 0.20 tbn, 0.20 tbc [15] => No pixel format specified, yuvj444p for H.264 encoding chosen. [16] => Use -pix_fmt yuv420p for compatibility with outdated media players. [17] => [libx264 @ 0x4214040] using SAR=1/1 [18] => [libx264 @ 0x4214040] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX [19] => [libx264 @ 0x4214040] profile High 4:4:4 Predictive, level 5.0, 4:4:4 8-bit [20] => [libx264 @ 0x4214040] 264 - core 148 r2694 3b70645 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - 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=12 lookahead_threads=2 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=1 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 [21] => Output #0, mp4, to 'vid/video.mp4': [22] => Metadata: [23] => encoder : Lavf56.40.101 [24] => Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj444p(pc), 2021x1117 [SAR 100:100 DAR 2021:1117], q=-1--1, 0.20 fps, 16384 tbn, 0.20 tbc [25] => Metadata: [26] => encoder : Lavc56.60.100 libx264 [27] => Stream mapping: [28] => Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264)) [29] => Press [q] to stop, [?] for help [30] => frame= 1 fps=0.0 q=17.0 Lsize= 85kB time=00:00:05.00 bitrate= 139.4kbits/s [31] => video:84kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.931709% [32] => [libx264 @ 0x4214040] frame I:1 Avg QP:10.98 size: 85605 [33] => [libx264 @ 0x4214040] mb I I16..4: 25.7% 55.1% 19.2% [34] => [libx264 @ 0x4214040] 8x8 transform intra:55.1% [35] => [libx264 @ 0x4214040] coded y,u,v intra: 28.2% 25.3% 21.6% [36] => [libx264 @ 0x4214040] i16 v,h,dc,p: 20% 54% 11% 15% [37] => [libx264 @ 0x4214040] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 27% 24% 3% 4% 1% 3% 1% 2% [38] => [libx264 @ 0x4214040] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40% 31% 12% 3% 4% 2% 3% 2% 3% [39] => [libx264 @ 0x4214040] kb/s:136.97 )

  I’ve read that adding -pix_fmt yuv420p might help but when I do that I get errors.

  Array ( [0] => ffmpeg version n2.8.7 Copyright (c) 2000-2016 the FFmpeg developers [1] => built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16) [2] => configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-x11grab --enable-libvpx --enable-libmp3lame [3] => libavutil 54. 31.100 / 54. 31.100 [4] => libavcodec 56. 60.100 / 56. 60.100 [5] => libavformat 56. 40.101 / 56. 40.101 [6] => libavdevice 56. 4.100 / 56. 4.100 [7] => libavfilter 5. 40.101 / 5. 40.101 [8] => libswscale 3. 1.101 / 3. 1.101 [9] => libswresample 1. 2.101 / 1. 2.101 [10] => libpostproc 53. 3.100 / 53. 3.100 [11] => [mjpeg @ 0x27f9ae0] Changeing bps to 8 [12] => Input #0, image2, from 'uploads/img%03d.jpg': [13] => Duration: 00:00:05.00, start: 0.000000, bitrate: N/A [14] => Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 2021x1117 [SAR 100:100 DAR 2021:1117], 0.20 tbr, 0.20 tbn, 0.20 tbc [15] => [swscaler @ 0x28097c0] deprecated pixel format used, make sure you did set range correctly [16] => [libx264 @ 0x27fa060] width not divisible by 2 (2021x1117) [17] => Output #0, mp4, to 'vid/video.mp4': [18] => Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 0.20 fps [19] => Metadata: [20] => encoder : Lavc56.60.100 libx264 [21] => Stream mapping: [22] => Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264)) [23] => Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height )

  Blockquote

  Any help is much appreciated.