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• How to create a video from a series of images with varying image durations ?

  6 octobre 2020, par user1354557

  I'd like to programmatically create a video file that is composed of a series of images. However, I'd also like to be able to specify a duration for each image. I often see ffmpeg examples suggested for similar tasks, but they always assume the same duration for each image. Is there an efficient way to accomplish this ? (An inefficient solution might be setting the frame rate to something high and repeatedly copying each image until it matches the intended duration)

  



  I will be dynamically generating each of the images as well, so if there is way to encode the image data into video frames without writing each image to disk, that's even better. This, however, is not a requirement.

  



  Edit : To be clear, I don't necessarily need to use ffmpeg. Other free command-line tools are fine, as are video-processing libraries. I'm just looking for a good solution.

  


• avformat : add demuxer for Pro Pinball Series' Soundbanks

  4 mai 2020, par Zane van Iperen

  avformat : add demuxer for Pro Pinball Series' Soundbanks
  Adds support for the soundbank files used by the Pro Pinball series of games.
  https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2020-May/262094.html
  Signed-off-by : Zane van Iperen <zane@zanevaniperen.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] Changelog
  • [DH] libavformat/Makefile
  • [DH] libavformat/allformats.c
  • [DH] libavformat/pp_bnk.c
  • [DH] libavformat/version.h

• How does one stream (udp) a series of tiff images using ffmpeg ?

  20 avril 2020, par Michael Carey

  I have written a program that receives images from a camera and then packages the images into a basic tiff format. Then I broadcast the tiff image out on UDP on localhost port 8999.

  



  I then run ffmpeg (on Windows 10) from a command line as follows :

  



  ffmpeg -i udp://127.0.0.1:8999 -preset ultrafast -vcodec libx264 -tune zerolatency -f mpegts udp://127.0.0.1:9000


  



  The idea with the above command is to receive the tiff images from my program, convert them into mpeg, and to then rebroadcast it out on a different port. (once I prove this, I may clip and compress the image as well)

  



  Finally, I open another command window and run ffPlay as follows so that I may see my output :

  



  ffplay udp://127.0.0.1:9000


  



  My output from the ffmpeg command is here :

  



  ffmpeg -i udp://127.0.0.1:8999 -preset ultrafast -vcodec libx264 -tune zerolatency -f mpegts udp://127.0.0.1:9000
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  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. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[tiff_pipe @ 0000021ebbe2d280] Could not find codec parameters for stream 0 (Video: tiff, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, tiff_pipe, from 'udp://127.0.0.1:8999':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: tiff, none, 25 tbr, 25 tbn, 25 tbc
Output #0, mpegts, to 'udp://127.0.0.1:9000':
Output file #0 does not contain any stream


  



  Any hints on how to make this work would be greatly appreciated.