ffmpeg -loop 1 -i image.png -c:v libx264 -t 15 -pix_fmt yuv420p -vf scale=320:240 out.mp4 The -t 15 makes it 15 seconds long. The -vf scale=320:240 sets the width/height. Make sure to use the latest ffmpeg version e.g. http://johnvansickle.com/ffmpeg/
Codecs proper: ffmpeg -codecs Formats: ffmpeg -formats
It’s not possible to embed videos directly, but you can put an image which links to a YouTube video: [](https://www.youtube.com/watch?v=YOUTUBE_VIDEO_ID_HERE) For more information about Markdown look at this Markdown cheatsheet on GitHub. For more information about Youtube image links look this question.
Your offsets are incorrect. Try: ffmpeg -i v0.mp4 -i v1.mp4 -i v2.mp4 -i v3.mp4 -i v4.mp4 -filter_complex \ “[0][1:v]xfade=transition=fade:duration=1:offset=3[vfade1]; \ [vfade1][2:v]xfade=transition=fade:duration=1:offset=10[vfade2]; \ [vfade2][3:v]xfade=transition=fade:duration=1:offset=21[vfade3]; \ [vfade3][4:v]xfade=transition=fade:duration=1:offset=25,format=yuv420p; \ [0:a][1:a]acrossfade=d=1[afade1]; \ [afade1][2:a]acrossfade=d=1[afade2]; \ [afade2][3:a]acrossfade=d=1[afade3]; \ [afade3][4:a]acrossfade=d=1” \ -movflags +faststart out.mp4 How to get xfade offset values: input input duration + previous xfade offset – xfade duration offset = … Read more
Try using this. It is the fastest and best ffmpeg-way I have figured out: ffmpeg -ss 00:01:00 -to 00:02:00 -i input.mp4 -c copy output.mp4 This command trims your video in seconds! Explanation of the command: -i: This specifies the input file. In that case, it is (input.mp4). -ss: Used with -i, this seeks in the … Read more
You are encountering several issues: Not all filters support sendcmd. You can see which filters support sendcmd with ffmpeg -filters. Look for a “C” to the left of the filter name. Additionally, only certain filter options (aka sendcmd “commands”) can be used with sendcmd. See the FFmpeg filter documentation, or refer to man ffmpeg-filters, and … Read more
Ok, still no clear, definitive answers, so I went on and took a little action. The WHATWG would probably have an answer for me, so I decided to contact someone there. Didn’t really know who it had to be, but fellow Dutchman Anne van Kesteren usually seems to know the Web’s future pretty well – … Read more
Ok, first of all assuming you know the start and stop duration; we will add key-frames at that duration. ffmpeg -i a.mp4 -force_key_frames 00:00:09,00:00:12 out.mp4 Most of the time you can directly cut the video with perfection but in your case it does not help you; so we have taken care of it by above … Read more
Take a look at my jquery videoBG plugin http://syddev.com/jquery.videoBG/ Make any HTML5 video a site background… has an image fallback for browsers that don’t support html5 Really easy to use Let me know if you need any help.
The most efficient method is to use negative mapping in the -map option to exclude specific stream(s) (“tracks”) while keeping all other streams. Remove a specific audio stream / track ffmpeg -i input -map 0 -map -0:a:2 -c copy output -map 0 selects all streams from the input. -map -0:a:2 then deselects audio stream 3. … Read more