On Thu, 30 Sep 2021 15:45:44 +0200, "Venkateswaran.S" <venketeswaran2...@gmail.com> wrote:
>> I thinks it's not possible with ffmpeg command line tool. There is a >> *delogo* filter which removes the logo from the clip but doesn't tell you >> the timings where this logo appears. > >You can easily detect the logo in image using opencv lib >> <https://ai-facets.org/robust-logo-detection-with-opencv/> . So if you >> can understand some C or C++, you can use ffmpeg c API to get sequence of >> avframes from your clip and feed it to opencv as an image to detect the >> logo. You can also get the timings of that frame from ffmpeg. This seems to be a way to detect a logo *anywhere* in an *image* even though it is distorted and rotated. But this is not my use case: 1) I am not dealing with an image as source, it is an mp4 video 2) I know the rect where the logo is located if it is on screen 3) I know the logo appearance, but its parts might change color from time to time. I want to tell ffmpeg to look at a specific rect (rather small) on screen expressed as coordinates in percentage of w and h. I just measured the area (w,h coordinates): It is located at (79%,84%) and the size is (16,4%, 11,9%) So ffmpeg/ffprobe should output a timestamp when the rect contains the logo and when it disappears again. Those two timestamps define the time the logo is on screen. Can it be done? -- Bo Berglund Developer in Sweden _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
