Recherche avancée

Sur d’autres sites (6649)

• Is it possible to play two videos as one like this ? [on hold]

  25 février 2015, par Marko

  Is it possible to show/play video online that’s made of two or more video files ? Here’s explanation.

  My site is hosted on Linux/Appache/PHP server. I have video files in FLV/F4V format.

  What I want is to have online video player that plays video composed of multiple video files concatenated together in real-time, i.e. when user clicks to see a video.

  Resulting video looks like one video, with no visual clues, lags or any delay between videos parts. Basically what is done is some form of on-the-fly editing or pre-editing, and user sees the result.

  Is this possible anyhow with flash, actionscript, ffmpeg, php, html or some other online technology ? I don’t need explanation how it’s possible, but just a nod that it’s possible and some links to further investigate.

• Is it possible to merge two or more videos in real-time like this ?

  25 février 2015, par Marko

  Is it possible to play video online that’s made of two or more video files ?

  Since my original post wasn’t clear enough, here’s expanded explanation and question.

  My site is hosted on Linux/Apache/PHP server. I have video files in FLV/F4V format. I can also convert them to other available formats if necessary. All videos have same aspect ratio and other parameters.

  What I want is to build (or use if exist) online video player that plays video composed of multiple video files concatenated together in real-time, i.e. when user clicks to see a video.

  For example, visitor comes to my site and sees video titled "Welcome" available to play. When he/she clicks to play that video, I take video files "Opening.f4v", "Welcome.f4v" and "Ending.f4v" and join/merge/concatenate them one after another to create one continuous video on the fly.

  Resulting video looks like one video, with no visual clues, lags or even smallest observable delay between video parts. Basically what is done is some form of on-the-fly editing or pre-editing, and user sees the result. This resulting video is not saved on the server, it’s just composed and played that way real-time.

  Also, if possible, user shouldn’t be made to wait for this merging to be over before he/she sees resulting video, but to be able to get first part of the video playing immediately, while merging is done simultaneously.

  Is this possible with flash/actionscript, ffmpeg, html5 or some other online technology ? I don’t need explanation how it’s possible, just a nod that it’s possible and some links to further investigate.

  Also, if one option is to use flash, what are alternatives for making this work when site is visited from iphone/ipad ?

• ffmpeg concatenate 3 videos with crossfade

  11 janvier 2017, par Crikey Mikey

  Im trying to join 3 videos together with a crossfade effect.

  I can get this working for 2 videos (sourced from stackoverflow but cant find the link) :

  ffmpeg -y -i part1.mp4 -i part2.mp4 -f lavfi -i color=black:s=1920x1080 -filter_complex \
  
  "[0:v]format=pix_fmts=yuva420p,fade=t=out:st=10:d=1:alpha=1,setpts=PTS-STARTPTS[va0]; \
  
   [1:v]format=pix_fmts=yuva420p,fade=t=in:st=0:d=1:alpha=1,setpts=PTS-STARTPTS+10/TB[va1]; \
  
   [2:v]trim=duration=20[over]; \
  
   [over][va0]overlay[over1]; \
  
   [over1][va1]overlay=format=yuv420[outv]" \
  
  -vcodec libx264 -map [outv] merged.mp4

  But cant work out how to make this work for 3 videos.

  I don’t need any audio. Any ideas ?

  Cheers,