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• FFMPEG libfdk_aac codec with VBR option not supported

  25 septembre 2018, par Piri

  I’m trying to makes an app that uses terminal ffmpeg with libfdk_aac codec.
  The problem is when I use -VBR mode, the result Bit rate mode is always Constant(CBR).

  I’ve searched about this problem and I’ve found the following article :

  https://lists.ffmpeg.org/pipermail/ffmpeg-user/2013-February/013652.html
  this article is from 2013 and seems is still valid !

  Also i am not the only one with this problem
  https://superuser.com/questions/1326239/encoding-aac-from-wav?rq=1

  My terminal string is :

  ffmpeg -i input* -c:a libfdk_aac -vbr 4 output**

  1. *- input formats can be : FLAC, WEBM, MP4
  2. **- output formats can be : M4A, AAC

  Question is : Can this be solved with the current version of ffmpeg :
  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) ??
  if not, is using directly fdkaac from terminal the only option ?

  Any Help is much appreciated.

• Scroll one image top to bottom

  17 septembre 2018, par Cyber

  I am trying to scroll an image top to bottom like this video :
  https://youtu.be/8GCrrsiBLzs

  And here’s what I tried

  ffmpeg -loop 1 -t 24 -i "image.jpg" -filter_complex "color=000000:s=640x360[bg]; [bg][0]overlay=shortest=1:y='min(0,-(t)*26)'" -y out6.mp4

  But video didn’t created, ffmpeg close immediately and returns following results :

  ffmpeg version N-91960-g63c69d51c7 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 8.2.1 (GCC) 20180813
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  
    libavutil      56. 19.101 / 56. 19.101
  
    libavcodec     58. 30.100 / 58. 30.100
  
    libavformat    58. 18.101 / 58. 18.101
  
    libavdevice    58.  4.103 / 58.  4.103
  
    libavfilter     7. 31.100 /  7. 31.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Input #0, image2, from 'image.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 134122 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x1920 [SAR 96:96 DAR 2:3], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 (mjpeg) -> overlay:overlay
  
    overlay -> Stream #0:0 (libx264)
  
  Press [q] to stop, [?] for help
  
  [swscaler @ 000001a855f90100] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 000001a856483200] using SAR=1/1
  
  [libx264 @ 000001a856483200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 000001a856483200] profile High, level 3.0, 4:2:0, 8-bit
  
  [libx264 @ 000001a856483200] 264 - core 157 r2932 303c484 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=11 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 'out6.mp4':
  
    Metadata:
  
      encoder         : Lavf58.18.101
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc58.30.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

• ffmpeg problem Could not write header for output file #0 (incorrect codec parameters ?) : Invalid data found when processing input

  2 octobre 2018, par Yair Villar

  im trying to grab a http streaming and restream it

  ffmpeg -re -i http://192.168.253.19:8000/play/0a0 -acodec copy -f rtsp rtsp://192.168.253.19:8000/test

  and the response i get is :

  fmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    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
  
  [mpeg2video @ 0x7fc6ca801e00] Invalid frame dimensions 0x0.
  
      Last message repeated 6 times
  
  Input #0, mpegts, from 'http://192.168.253.19:8000/play/0a0':
  
    Duration: N/A, start: 83102.371922, bitrate: 15192 kb/s
  
    Program 306
  
      Metadata:
  
        service_name    :
  
        service_provider:
  
      Stream #0:0[0x8a2]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bottom first), 704x480 [SAR 10:11 DAR 4:3], 15000 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1[0xc93]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono, fltp, 128 kb/s
  
      Stream #0:2[0xc94]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono, fltp, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg2video (native) -> mpeg4 (native))
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input
  
  Error initializing output stream 0:0 --
  
  Conversion failed!

  I can’t seem to figure out what the problem is, i am passing this to node-fluent-ffmpeg latter on and pushing all to an astra server