Recherche avancée

Sur d’autres sites (9995)

• Display formatted date and time over frames using ffmpeg

  28 août 2020, par marcman

  I've gone through a handful of questions on here (this, this, this, etc) concerning overlaying the date and time on videos using ffmpeg, but I haven't been able to figure out the solution.

  


  I personally have found the ffmpeg documentation difficult to parse as well regarding drawing text that updates every (N) frame(s).

  


  I have the exif data from a movie specifying when it was created. I'd like to be able to emblazen that over the movie (as though it were a home video from some old VHS tape). For example, let's say I have a video from January 2, 2012 at 10:33:53. I'd like to be able to show "Jan 2, 2012 10:33:53am" on the lower right in white text. The spatial positioning and color are clear to me, but just how to go from the timestamp information I have to the formatted expansion is proving to be quite difficult for me. I have succeeded in getting a clock starting from 00:00:00.00 and counting up (using timecode and timecode_rate), but unfortunately I can't get much more than that.

  


  My question is : what is the proper datetext command that will allow me to both (a) provide the start time, and (b) format it with the proper expansion.

  


  ---

  


  As a bonus, if you can also point me to how to do this using the wonderful ffmpeg-python library, it would be even better. That library is quite good, but it does not appear to be actively maintained anymore.

  


• How can i add audio at specific time/Frame in FFmpeg ?

  22 décembre 2023, par Mickey S

  I have audio that i am adding (without Re-encode) in mute video file, in starting i have intro which has no sound and i want to add audio file after that time/frame , after searching so hard i only found this command useful,
ffmpeg -y -i file.mp4 -itsoffset 00:00:05 - i file.wav -map 0:0 -map 1:0 -c:v copy -preset ultrafast -async 1 out.mp4

  


  it does the job but the problem is , its not precise , it is kind of mismatch because audio is supposed to be starting at 4.840 seconds but its not possible with this command, please suggest me something to solve my problem :(

  


  Thanks

  


  I tried on Reddit, various command site etc.

  


• ffmpeg : loop count based on certain time

  1er novembre 2023, par L.P.

  I need to loop several short videos for at least 30 seconds each. I could do each one separately but it's too much manual work. Each input video should have their own output video. There was this article in which the amount of loops based on the length of another media file. In my case, there is no such thing. The output should ideally have slightly over 30 seconds of looping video so that the last of the loops is not cut short. How do I achieve this in ffmpeg ?