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• FFMPEG multiple styles in .srt file

  7 décembre 2020, par Tim

  I have an SRT file and want to change the background color and level of transparency for individual tracks. Is this possible, or would I have to adopt a more advanced format ? Would this task even work in FFMPEG ?

  


  1&#xA;0:0:1,440 --> 0:0:1,970  Y1:20&#xA;<font color="#FF1F497D">{\an2}the settlement?</font>&#xA;2&#xA;0:0:2,640 --> 0:0:3,150  Y1:20&#xA;<font color="#FFC0504D">{\an2}Yes.</font>&#xA;3&#xA;0:0:3,740 --> 0:0:4,690  Y1:20&#xA;<font color="#FFFFFFFF">{\an2}Have you been waiting long?</font>&#xA;

  


• Remapping multiple Mp4 videos into a single one with ffmpeg

  21 septembre 2016, par Josep Bosch

  I’m interested in remapping multiple (6) MP4 videos into a high resolution final video according to lookup tables I calculated. The idea is convert 6 independent videos in a 360º video according to an equirectangular projection.

  
  Example of equirectangular video here

  Is there a way to do this remapping with ffmpeg or any other linux program ?
  Right now I’m extracting all the frames from the videos, creating the equirectangular individual images and joining them again into a video. There must be a better way for this...

  UPDATE :

  Following Mulyva’s suggestion I first remap each individual video using the remap filter. Those parts of the panoramic video not covered are interpreted like chromakey pixels using :

  ffmpeg -i videos/camera1.MP4 -i camera0_map_x_radius5.pgm -i camera0_map_y_radius5.pgm -lavfi remap -qscale 1 out0.MP4

  

  

  Then I try to overlay them using the chomakey filter :

   ffmpeg -i out0.MP4 -i out1.MP4 -filter_complex "[1:v]chromakey=0x12da11:0.2:0.2[chromakey_res];[0:v][chromakey_res]overlay=eof_action=pass[out]" -map "[out]" out.mp4

  As you can see, the final result has an undesirable green shadow. Any idea of how to remove it ?

  

• Need help concatenating multiple 2 part .mp4s

  9 septembre 2016, par Jay Ford7

  Basically, I have about 200 2-part videos that I would like to concatenate as 100 individual files.

  All the files are labeled with the same file name but with part 1 and part 2 on the end, ie "Video Name Part 1...Video Name Part 2"

  Through basic searching I understand how to combine two videos into one video manually with ffmpeg, but is there a way for ffmpeg to recognize the naming structure and do a batch concatenation ?

  EDIT : I should’ve said I was on Windows !

  Thanks !