Thanks for your answer Carl. -skip_frame works. Too bad "spatial subsampling" is hard or impossible .
On Thu, Nov 30, 2017 at 2:22 PM, Carl Eugen Hoyos <ceffm...@gmail.com> wrote: > 2017-11-30 10:22 GMT+01:00 Aviv Hurvitz <aviv.hurv...@gmail.com>: > > I'd like to make a CPU-efficient computer vision application > > based on a H264 stream. > > > > I have two ideas and wanted to get feedback on their feasibility: > > > > *Idea 1 - temporal subsampling* > > -skip_frame nointra > > Note that valid (decodable) H.264 streams without I-frames exist. > > [...] > > > *Idea 2 - spatial subsampling* > > -lowres 1 > > Unfortunately, this does not work for H.264 (it works for mpeg1/2/4 > and jpeg/jpeg2000), implementing it is impossible (?) or at least > non-trivial - patch welcome! > > 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". _______________________________________________ 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".
