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• avformat/mpegts : make sure mpegts_read_header always stops at the first pmt

  15 novembre 2020, par Marton Balint

  avformat/mpegts : make sure mpegts_read_header always stops at the first pmt
  mpegts_read_header stops parsing the file at the first PMT. However the check
  
  that ensured this was wrong because streams can also be added before the first
  
  PMT is received (e.g. EIT).
  So let's make sure we are in the header reading phase by checking if ts->pkt is
  
  unset instead of checking if the number of streams found so far is 0.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavformat/mpegts.c

• ffmpeg make image and movie in one command

  22 juin 2012, par knishua

  this is the situation :
  given a thumbnail, i need to overlay it on top of an image.

  so, i need to scale image pass it as parameter to overlay pass that to drawtext.

  I have got so far, adding multiple text + overlay + thumbnail,

  1. ffmpeg -threads 8 -i D:/imagesequence/background.jpg -vf "movie='D\:/imagesequence/dpx/thumbnail.jpg' [watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3[water];[water] drawtext=fontsize=32:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='shotName':x=(w)/2:y=(h)-50,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Notes \:':x=(w)/5:y=(h)-90,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Frame Range \:':x=(w)/5:y=(h)-130,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Lens \:':x=(w)/5:y=(h)-170,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Undistortion \:':x=(w)/5:y=(h)-210,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Image Sequence \:':x=(w)/5:y=(h)-250,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Date \:':x=(w)/5:y=(h)-290,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Element Name \:':x=(w)/5:y=(h)-330,drawtext=fontfile=/Windows/Fonts/arial.ttf:text='FUTUREWORKS':x=130:y=200:fontsize=54:fontcolor=White[out]" D:\imagesequence\dpx\brn_055.0000.dpx

  2. ffmpeg -threads 8 -i D:\imagesequence\dpx\brn_055.%04d.dpx -vf "drawtext=fontfile=/Windows/Fonts/arial.ttf:text='shotcam':x=(w)/2:y=(h)-35:fontsize=24:fontcolor=Yellow,drawtext=fontfile=/Windows/Fonts/arial.ttf:text='Frame \:':x=(w)-600:y=(h)-35:fontsize=24:fontcolor=Yellow,drawtext=fontfile=/Windows/Fonts/arial.ttf:text='Focal Length \:':x=(w)-600:y=(h)-65:fontsize=24:fontcolor=Yellow" D:\imagesequence\dpx\test2.mov

  3. how do i scale an image and pass it to movie, in 1

  4. how do i make a blackscreen size that of an image say
     'D :\imagesequence\dpx\brn_055.0001.dpx' and pass it to input in 1

  5. is it possible do bother 1 and 2 in one command line ( ffmpeg ....)
     i.e. make an image from first point ( 1 ) and continue with making .mov ( of 1 image + input from point 2 )

  or in other words if it is not possible to do (1 + 2) in one command then is it possible to first execute 1 then execute 2 ( but with output from 1)
  do it

• How to display animated svg over video using ffmpeg ?

  27 mars 2023, par Shivam gupta

  I am trying to show animated svg above the video.
I am able to show svg over video but it is static means animation is not visible.

  


  I am able to achieve this by enabling enable-librsvg flag in ffmpeg and used below command to generate output

  


  ./ffmpeg -i ~/Downloads/video2.mp4 -i ~/Downloads/plant-2.svg -filter_complex "[0:v][1:v] overlay=0:0" -c:a copy output.mp4


  


  I am not sure what i am doing wrong due to which instead of animated svg static svg is coming.