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• How to use ffmpeg to create a video slideshow from a set of images ? [on hold]

  15 mars 2015, par Ali Irani

  I want to create a 15 second video from 5 images with a fade effect between them and add counter on center of video that changes every second. The final video also needs an audio track.

  Can I do this with ffmpeg ?

• How use FFMPEG to merege multiple audios and videos with delay and offset for any streams

  9 juillet 2020, par Morak

  I want to use FFMPEG to merge multiple audios and videos.

  


  Materials are :

  


  

  1. three short audio clips (S1.mp4, S2.mp4, S3.mp4) without video(files
only have audio stream),

  


  2. three video clips (V1.mp4, V2.mp4, V3.mp4) without sound(files only have video stream).

  


  


  I have start-time of all materials(i.e :

  


  start-time of "S1.mp4" is 0 sec...
start-time of "S2.mp4" is 1220.5 sec...
start-time of "S3.mp4" is 2500.12 sec...


  


  and

  


  start-time of "V1.mp4" is 15.22 sec...
start-time of "V2.mp4" is 853.99 sec...
start-time of "V3.mp4" is 2901.37 sec...)


  


  My goal is :

  


  Merge all videos and audios to single file with entering in their start time.

  


  The requirement is depicted like below(D=delay).

  


  D <—V1.mp4—> D <----------V2.mp4-------------> D <-V3.mp4->blank

  &#xA;

  <------------S1.mp4-----> D <-------S2.mp4—> D <-------S3.mp4------->

  &#xA;

  The command I use is as below, but it does not work as expected.

  &#xA;

  1st:prepare V.mp4(merging all videos) :

  &#xA;

  ffmpeg -itsoffset {OFFSET.V1} -i V1.mp4  -itsoffset {OFFSET.V2} -i V2.mp4  -itsoffset {OFFSET.V3} -i V3.mp4 -map 0:v -map 1:v -map 2:v -c:v copy V.mp4

  &#xA;

  2nd:prepare S.mp4(merging all audios) :

  &#xA;

  ffmpeg -i S1.mp4 -i S2.mp4 -i S3.mp4 -filter_complex "[0]adelay=0[aud1];[1]adelay=1220.5[aud2];[2]adelay=2500.12[aud3];[aud1][aud2][aud3]amix=3[a]" -map "[a]" -c:a copy S.mp4

  &#xA;

  final:merging V.mp4 with S.mp4 :

  &#xA;

  ffmpeg -i V.mp4 -i S.mp4 -map 0:v -map 1:a -vcodec copy -acodec copy final.mp4

  &#xA;

  Any hint is appreciated !

  &#xA;

• Cannot include ffmpeg.exe using auto-py-to-exe

  4 avril 2024, par YYY

  I'm trying to generate an exe for my PyQT application that uses ffmpeg using auto-py-to-exe.

  &#xA;

  Within the application, there are calls to ffmpeg as an os command (like 'ffmpeg -i file ... output) .&#xA;As I have ffmpeg installed on my machine and accessible from the Windows Path, when I run the app exe on my machine, I don't have any issue.

  &#xA;

  However, when it's someone that doesn't have ffmpeg installed, he/she encounters an error like "'ffmpeg' is not recognized as an internal or external command, operal program or batch file"

  &#xA;

  I don't want to put ffmpeg within a folder of the app as I call local modules that already call ffmpeg as an os command.

  &#xA;

  I have tried first to add ffmpeg.exe as a file (as recommended in one stackoverflow post) and then as a binary but without success&#xA;

  &#xA;

  I've already tried with the configuration stated in this

  &#xA;

  Can anyone help me on this ?

  &#xA;

  EDIT N°2

  &#xA;

  It turns out that when I export the exe on my machine by including ffmpeg as a binary either with pyinstaller or auto-py-to-exe, the final exe doesn't recognize the ffmpeg command even if it's in the folder.

  &#xA;

  

  &#xA;

  However, I've tried the same configuration on another machine and it worked without any error.

  &#xA;

  I've tried to install another ffmpeg version and link this version on the final exe but without success

  &#xA;