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• How create synth with FFMPG ?

  1er novembre 2022, par Seb

  I am looking for the creation of a synth (synthé in french) with FFMPEG. For more explanation, a synth is a rectangle on a movie, where you can write text. In France, we had a very good science program on TV which have an example of the synth I'd like : https://www.youtube.com/watch?v=HR7HojWY-kg from 11:50 to 11:54 where it is written "Dr Luc DE HARO". As this example, I'd like to add on the left a image. I am looking for weeks to do that but I can't realise this synth. Could you help me please ?

  


• how to repeat this ffmpeg effect

  5 septembre 2018, par Vladislav Korobeinikov

  I looking for solution - how to repeat effects :

  1. Zoom on central bottom part at start, with no zoom effect ;
  2. Moving from bottom to top and from left to right ;
  3. Zoom out.

  In this video with ffmpeg filters.

  I read documentation (filters and zoompan filter) from official site, found some information from "ffmpeg basics" written by Frantisek Korbel - but I didn’t find any useful information that solve my problem.

  Also I thought that it could be made with another software.

• Upper limit on FFMPEG/libx264 frame sizes ?

  22 mars 2014, par Chaotic

  I'm trying to use FFMPEG to transcode a video with very large frames (4096 x 4096). It's a short video - just under two minutes, but the source video file is 15.8GB. (The video is an animation designed to be projected onto planetarium domes.)

  The source file is a Quicktime MOV containing uncompressed Photo-JPEG images (with audio, too). When I tell FFMPEG to transcode my MOV file into an MP4 file, it simply says :

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

  Not very helpful, but yes, I've verified that all of the parameters are correct and/or defaults. In fact, if I change the requested output size to 2048x2048, then everything works just fine. That's why I suspect that there's an upper bound in the encoder.

  I am kerflummoxed. Any suggestions that result in a successful transcode will be greatly appreciated. (At this point I am also willing to consider alternatives to FFMPEG.)

  The Facts

  I run FFMPEG from a script :

  set srcFile=%1
  
  set dstFile=%srcFile:.mov=.mp4%
  
  
  
  ffmpeg -i %srcFile% -movflags faststart -q:a 0 -q:v 0 -pix_fmt yuv420p -sws_flags gauss -s 4096x4096 %dstFile%

  The Output

      ffmpeg version N-50911-g9efcfbe Copyright (c) 2000-2013 the FFmpeg developers
  
      built on Mar 13 2013 21:26:48 with gcc 4.7.2 (GCC)
  
      configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --ena
  
  ble-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 19.100 / 52. 19.100
  
    libavcodec     55.  0.100 / 55.  0.100
  
    libavformat    55.  0.100 / 55.  0.100
  
    libavdevice    54.  4.100 / 54.  4.100
  
    libavfilter     3. 45.103 /  3. 45.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'also-sprach-zarathustra-4k.mov':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      creation_time   : 2013-01-11 23:41:30
  
    Duration: 00:01:40.57, start: 0.000000, bitrate: 1357694 kb/s
  
      Stream #0:0(eng): Audio: pcm_s16be (twos / 0x736F7774), 44100 Hz, stereo, s16, 1411 kb/s
  
      Metadata:
  
        creation_time   : 2013-01-11 23:41:30
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj420p, 4096x4096 [SAR 1:1 DAR 1:1], 1356281 kb/s, 30 fps, 30
  
  tbr, 3k tbn, 3k tbc
  
      Metadata:
  
        creation_time   : 2013-01-11 23:41:30
  
        handler_name    : Apple Alias Data Handler
  
  File 'also-sprach-zarathustra-4k.mp4' already exists. Overwrite ? [y/N] y
  
  using SAR=1/1
  
  [libx264 @ 003b9c80] frame MB size (256x256) > level limit (36864)
  
  [libx264 @ 003b9c80] DPB size (4 frames, 262144 mbs) > level limit (2 frames, 184320 mbs)
  
  [libx264 @ 003b9c80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI1 BMI2
  
  x264 [error]: malloc of size 17305600 failed
  
  Output #0, mp4, to 'also-sprach-zarathustra-4k.mp4':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 537199360
  
      compatible_brands: qt
  
      Stream #0:0(eng): Video: h264, yuv420p, 4096x4096 [SAR 1:1 DAR 1:1], q=-1--1, 90k tbn, 30 tbc
  
      Metadata:
  
        creation_time   : 2013-01-11 23:41:30
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: none, 44100 Hz, stereo, s16, 128 kb/s
  
      Metadata:
  
        creation_time   : 2013-01-11 23:41:30
  
        handler_name    : Apple Alias Data Handler
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (mjpeg -> libx264)
  
    Stream #0:0 -> #0:1 (pcm_s16be -> libvo_aacenc)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  PS : Yes, for those playing at home, it is the theme to 2001 - A Space Odyssey. You can see a 1K YouTube version here : 2001 - A Fulldome Space Odyssey And yes, in a planetarium with a good sound system, it is absolutely EPIC.