Select the most representative frame in a given sequence of consecutive frames using CUDA.
The filter accepts the following options:
- n
-
Set the frames batch size to analyze; in a set of n frames, the filter will pick one of them, and then handle the next batch of n frames until the end. Default is
100.
Since the filter keeps track of the whole frames sequence, a bigger n value will result in a higher memory usage, so a high value is not recommended.
Example
-
Thumbnails are extracted from every n=150-frame batch, selecting one per batch. Chosen frames are then scaled with scale_cuda.
./ffmpeg -hwaccel cuda -hwaccel_output_format cuda -i ./input.mp4 -vf "thumbnail_cuda=150,scale_cuda=1920:1080,hwdownload,format=nv12" ./output/out%03d.png