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• Adding unique RGB color watermark per video frame with FFmpeg

  8 juin 2016, par Dustin Kerstein

  I’d like to add a unique watermark onto each unique video frame in an h264 mp4 video. More specifically, I want the watermark to be a X by X pixel square solid 8-bit RGB color, and each color watermark should be unique across all frames in the video (up to the theoretical 24 bit max of 16.7 million colors/frames).

  Is this possible to do programatically using FFmpeg filters (or another tool) without requiring a photo for each possible color watermark ?

  If not, assuming I already have the full set of 1029 solid color photos downloaded from http://www.solidbackgrounds.com, can anyone think of an easy way to watermark a video with <= 1029 frames using FFmpeg ?

• How to extract anamorphic video frame correctly using ffmpeg ?

  12 mai 2019, par user10246830

  I can extract the frames using below ffmpeg but it comes out 720x576 square pixel instead of anamorphic non-square 1024x576. How do I output 720x576 rectangle pixel as shown on TV ?

  How do i deinterlace the frames as output is interlaced ?

  ffmpeg -i Midnight.vob -vf fps=1,setdar=16:9 -q:v 2 Midnight%06d.jpg

  How do i deal with this below in ffmpeg.

  [swscaler @ 0000000002a8ec40] deprecated pixel format used, make sure
  you did set range correctly. Video : mjpeg, yuvj420p(pc).

  Am I to understand that the video colour format is out of date and that (pc) is the range 0-255 for colours ?

  ffmpeg -i Midnight.vob -vf fps=1,setdar=16:9 -q:v 2 Midnight%06d.jpg ffmpeg version N-93828-g68bac50604 Copyright (c) 2000-2019 the FFmpeg developers
  
  
  
  built with gcc 8.3.1 (GCC) 20190414 configuration: --enable-gpl
  
  --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --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 --enable-libopenmpt libavutil      56. 26.101 / 56. 26.101 libavcodec     58. 52.101 / 58.
  
  52.101 libavformat    58. 27.103 / 58. 27.103 libavdevice    58.  7.100 / 58.  7.100 libavfilter     7. 50.100 /  7. 50.100 libswscale      5.  4.100 /  5.  4.100 libswresample   3.  4.100 /  3.  4.100 libpostproc    55.  4.100 / 55.  4.100 Input #0, mpeg, from 'Midnight.vob':   Duration: 00:42:04.58, start: 0.287267, bitrate: 5829 kb/s
  
      Stream #0:0[0x1bf]: Data: dvd_nav_packet
  
      Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
  
      Stream #0:3[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
  
      Stream #0:4[0x82]: Audio: ac3, 48000 Hz, mono, fltp, 192 kb/s
  
      Stream #0:5[0x22]: Subtitle: dvd_subtitle
  
      Stream #0:6[0x24]: Subtitle: dvd_subtitle
  
      Stream #0:7[0x25]: Subtitle: dvd_subtitle
  
      Stream #0:8[0x26]: Subtitle: dvd_subtitle
  
      Stream #0:9[0x28]: Subtitle: dvd_subtitle
  
      Stream #0:10[0x21]: Subtitle: dvd_subtitle
  
      Stream #0:11[0x23]: Subtitle: dvd_subtitle Stream mapping:   Stream #0:1 -> #0:0 (mpeg2video (native) -> mjpeg (native)) Press [q] to stop, [?] for help [swscaler @ 000000000295ec40] deprecated pixel format used, make sure you did set range correctly Output #0, image2, to 'Midnight%06d.jpg':   Metadata:
  
      encoder         : Lavf58.27.103
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc), 720x576 [SAR 36:5 DAR 9:1], q=2-31, 200 kb/s, 1 fps, 1 tbn, 1 tbc
  
      Metadata:
  
        encoder         : Lavc58.52.101 mjpeg
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1 [mpeg @ 0000000000400340] New subtitle stream 0:12 at pos:7458830 and DTS:12.4873s [mpeg @ 0000000000400340] New subtitle stream 0:13 at pos:7475214 and DTS:12.4873s frame=  951 fps=115 q=2.0 Lsize=N/A time=00:15:51.00 bitrate=N/A speed= 115x
  
  
  
  video:49190kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

  Settled on for large jpg to render then shrink to 1024x576. If deinterlace remove yadif=1.

  ffmpeg -i input.vob -vf yadif=1,scale=4096x2304,setdar=16:9 -qmin 1 -q:v 1 output%06d.jpg

  Jpg is original size 1024x576 square pixel.

  ffmpeg -i input.vob -vf yadif=1,fps=1,scale=iw*sar:ih,setsar=1 -qmin 1 -q:v 1 output%06d.jpg

  Png gives better quality over jpg.

  Thanks for your contributions.

• Linux use a filename to derive parameters from

  5 avril 2017, par JoAnywhere

  I am using raspbian for a project.

  Here is my situation. I’m creating three files :

  1. a wav file with a filename format of [date_and_timestamp].wav.
  2. an avi file with a filename format of [date_and_timestamp].avi.
  3. a file with the name marker_[date_and_timestamp]

  The value of [date_and_timestamp] is consistent across all three files.

  What I want to do is look for all files starting with marker_, get the [date_and_timestamp] portion and use it to pass as a parameter to ffmpeg to combine the two files (i.e. ending up with a command that looks like

  ffmpeg -i /home/motion/[date_and_timestamp].avi -i /home/motion/[date_and_timestamp].wav /home/motion/[date_and_timestamp].mp4

  Given how powerful sh is, I know there will be a way, but I am far to n00bish to know what it is.

  The square brackets are there for clarity. They do not appear in the filenames.