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• How to add watermark with delay in FFmpeg

  28 décembre 2022, par Мохамед Русланович

  Am trying to put a gif file in all the edges of the video. So am using this command

  


  ffmpeg  -y -i film.mp4 -stream_loop -1 -i gif.gif -filter_complex \ 
"[1]colorchannelmixer=aa=0.8,scale=iw*1:-1[a];[0][a]overlay=
x='if(lt(mod(t\,16)\,8)\,W-w-W*10/200\,W*10/100)':
y='if(lt(mod(t+4\,16)\,8)\,H-h-H*5/200\,H*5/200)':
shortest=1" 
 -acodec copy output_task_3.mp4


  


  But now am required to put the gif file on each edge with delay of 10 minutes

  


  For exmaple :

  


  1- render gif at top left for only 16 seconds.
Then wait 10 minutes

  


  2- render gif at top right for 16 seconds.
Wait 10 minutes

  


  3- rendder gif at right buttom for 16 seconds.
Wait 10 minutes

  


  4- render gif at left buttom for 16 secnods.
Wait 10 minutes

  


  This scenario should be repete till the movie ends.

  


  How can i archive this ?

  


• getruntime() exec() with double quotes in command

  29 décembre 2012, par brux

  I want to execute an ffmpeg command, the method I am using works with every command on my list except the following one which contains double quotes to set a filter (-vf) parameter

  ffmpeg -i 2012-12-27.mp4 -vf "movie=bb.png [movie]; [in] [movie] overlay=0:0 [out]" -vcodec libx264 -acodec copy out.mp4

  I have tried changing the quotes for single quotes with no luck. The command works at the android terminal with both single and double quotes.

  The app I'm developing uses about 5 ffmpeg commands, all work except this one, is this some bug ?

  I can't find a concrete solution to this problem, breaking the args into an array and then passing this to runtime().exec() as suggested elsewhere doesn't seem to work, or simply trying to escape the quotes with \" won't work.

  Both of the files referenced in the above command are located in the sdcard, I removed the concatenation of the command out so that things don't get messy, rest assured these commands work in a terminal when referencing the full paths to the files.
  I contatenate the string passed to getRuntime().exec() using a stringbuilder and`getexternalstorageDirectory().getabsolutepath() to get the path to each file like I have been doing with previous commands when using the process class.

  I am using Jelly Bean 4.2 in case that is of any significance.

• m3u8 contains only the last indexes of generated files

  5 février 2018, par Blurry Script

  this is the generated m3u8 file :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:11
  
  #EXT-X-MEDIA-SEQUENCE:1372
  
  #EXTINF:10.427089,
  
  720p_1372.ts
  
  #EXTINF:10.427100,
  
  720p_1373.ts
  
  #EXTINF:10.427089,
  
  720p_1374.ts
  
  #EXTINF:10.427089,
  
  720p_1375.ts
  
  #EXTINF:9.009011,
  
  720p_1376.ts
  
  #EXT-X-ENDLIST

  this is the command I used

   ffmpeg -i film.avi -hls_time 4 -hls_segment_filename test/720p_%03d.ts test/720p.m3u8

  my question is why the m3u8 file contains only the last ts indexes, as there are 1376 of them, but only 1372-1376 were written in the file