Hi all, Can av_frame_is_writable() ever return 1, and if so, when?
Context: I am testing corner cases of the delogo filter. To my surprise, even for a simple test case such as: $ ffmpeg -f lavfi -i "color=color=white:size=24x24" -frames:v 1 -vf "delogo=7:3:8:8" -f image2 debug.png av_frame_is_writable() returns 0, which disables direct mode of the delogo filter and forces the allocation of a new buffer. My understanding was that we were trying to avoid allocation and data copy as much as possible, for performance reasons, and with such a simple filter graph I can't see why we can't modify the video data in-place. Can someone enlighten me? Thanks, -- Jean Delvare SUSE L3 Support _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
