CODEWITHSUNDEEP
c++linuxffmpeg
asad
asad

Reputation: 291

Add watermark to each frame while creating video from images using ffmpeg

I am basically creating video from opengl animation uisng glreadpixels and unix pipeline : FILE *ffmpeg = popen("/usr/local/Cellar/ffmpeg/2.5.4/bin/ffmpeg" " -framerate 30" " -vcodec rawvideo" " -f rawvideo" " -pix_fmt rgb32" " -s 1080x720" " -i pipe:0 -vf vflip -vcodec h264" " -r 60" " /Users/xamarin/Desktop/out.mp4", "w"); Is it possible to add watermark in each frame as i am creating frames for video. I know how to add watermark in existing video but i want to add watermark as i am creating video so that in on step i get video that has watermark in it. Suggest me some parameters for ffmpeg that can do this.

Upvotes: 0

Views: 1276

Answers (1)

llogan
llogan

Reputation: 133693

Use the overlay filter:

ffmpeg \
-framerate 30 -f rawvideo -pixel_format rgb32 -video_size 1080x720 -i pipe:0 \
-i overlay.png \
-i audio.foo \
-filter_complex "[0:v]vflip[main];[main][1:v]overlay=format=rgb,format=yuv420p" \
-c:v libx264 -c:a aac -movflags +faststart output.mp4

  • The rawvideo demuxer documentation lists -pixel_format instead of -pix_fmt and -video_size instead of -s.

  • You probably don't need -c:v rawvideo when you include -f rawvideo.

  • I removed -r 60 because it seems unnecessary to duplicate the frames.

  • You may see a visual improvement when adding format=rgb to the overlay filter for RGB inputs. The format filter is then used to make H.264 output with YUV 4:2:0 chroma subsampling which is needed for non-FFmpeg based players.

  • -movflags +faststart is helpful if your viewers will watch via progressive download.

Upvotes: 2

Related Questions