2016-12-02 16:51 GMT+01:00 Joshua Grauman <j...@grauman.com>: > Hello all, > > I am using the following command successfully to generate a screencast. The > video comes from my program 'gen-vid' which outputs the raw frames with > alpha channel. The resulting .avi has alpha channel as well which is my > goal. It all works great except that my computer can't handle doing it > real-time. So I am wondering if there is a different vcodec I could use to > achieve the same result that was less demaning on the cpu? I am willing to > sacrifice some compression for more speed, but would prefer not to have to > store all the raw frames without any compression. Storing the alpha channel > is also a must. It is preferable if the compression is lossless. Does anyone > have any other suggestions for compression other than png that may be > faster? Thanks! > > ./gen-vid | ffmpeg -f rawvideo -pixel_format bgra -video_size 1920x1080 > -framerate 30 -i - -vcodec png over.avi
utvideo is faster than png, consider to change gen-vid so it outputs rgba to slightly increase speed, this will also slightly increase performance with png. Carl Eugen _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".