> On Mar 4, 2021, at 1:57 PM, Paul B Mahol <one...@gmail.com> wrote: > > On Thu, Mar 4, 2021 at 9:36 PM Steven Kan <ste...@kan.org> wrote: > >> I have captured some nice footage of 3 coyotes traipsing through my yard, >> from two IP cameras facing opposite directions. Recording was initiated by >> in-camera motion triggers, so the recordings start about 50 seconds apart, >> as you can tell from the burned-in timestamps at the start of each video at >> 01:10:17 and 01:11:07, respectively: >> >> https://www.youtube.com/watch?v=lP5Kpg_vTEE >> <https://www.youtube.com/watch?v=jvXoUhKuC5c> < >> https://www.youtube.com/watch?v=jvXoUhKuC5c> >> https://www.youtube.com/watch?v=jvXoUhKuC5c >> >> I’d like to assemble these videos, side-by-side, but synced in time, which >> means the TrailDown video needs to start 50 seconds after the TrailUp >> video. The TrailDown side can be black/blank, or it can be stuck on the >> first frame of its video while the right side plays for the first 50 >> seconds; it doesn’t matter to me. >> >> I’ve tried all of the following: >> >> -itsoffset 50 -i TrailDown.mp4 -i TrailUp.mp4 >> -itsoffset 50 -i TrailDown.mp4 -itsoffset 0 -i TrailUp.mp4 >> -i TrailDown.mp4 -itsoffset -50 -i TrailUp.mp4 >> > > see tpad filter, need recent version.
Thanks! I have figured out the syntax to pad a single video with tpad, e.g.: ffmpeg -i /Users/steven/Downloads/Record/DownLoad/TrailDown_ch1_20210304010952_20210304011838.mp4 -filter_complex "tpad=start_duration=50" tPadOut.mp4 but I’m having trouble with the syntax to delay only one of two videos in an hstack filter: ffmpeg -i /Users/steven/Downloads/Record/DownLoad/TrailDown_ch1_20210304010952_20210304011838.mp4 -i /Users/steven/Downloads/Record/DownLoad/TrailUp_ch1_20210304010838_20210304011506.mp4 -filter_complex "tpad=start_duration=50[v0];hstack=inputs=2" Coyote2Up.mp4 ffmpeg version N-100466-g29cef1bcd6-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers built with Apple clang version 11.0.0 (clang-1100.0.33.17) configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay libavutil 56. 62.100 / 56. 62.100 libavcodec 58.115.102 / 58.115.102 libavformat 58. 65.100 / 58. 65.100 libavdevice 58. 11.103 / 58. 11.103 libavfilter 7. 94.100 / 7. 94.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/steven/Downloads/Record/DownLoad/TrailDown_ch1_20210304010952_20210304011838.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 creation_time : 2021-03-04T18:50:57.000000Z Duration: 00:01:09.05, start: 0.000000, bitrate: 6353 kb/s Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 2592x1944, 6351 kb/s, 20 fps, 20 tbr, 1k tbn, 2k tbc (default) Metadata: creation_time : 2021-03-04T18:50:57.000000Z handler_name : VideoHandler vendor_id : [0][0][0][0] Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/steven/Downloads/Record/DownLoad/TrailUp_ch1_20210304010838_20210304011506.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 creation_time : 2021-03-04T18:52:03.000000Z Duration: 00:01:43.90, start: 0.000000, bitrate: 6319 kb/s Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 2592x1944, 6317 kb/s, 20 fps, 20 tbr, 1k tbn, 2k tbc (default) Metadata: creation_time : 2021-03-04T18:52:03.000000Z handler_name : VideoHandler vendor_id : [0][0][0][0] Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_hstack_1 _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".