$ ffmpeg -i input.mp4 -vf 'setpts=4.0*PTS' output.mp4 21.tvstd standard Set television standard ( NTSC, PAL ( SECAM)). Audio/Video grab options-vc channel Set video grab channel ( DV1394 only). ffmpeg -i file.mov -an -vn -sbsf mov2textsub -scodec copy -f rawvideo sub.txt. -sbsf bitstream_filter Bitstream filters available are 'mov2textsub', 'text2movsub'.dnn_interface: change from 'void *userdata' to 'AVFilterContext *filter_ctx' vf_dnn_processing.c: replace filter_frame with activate func 4.
