[FFmpeg-user] hstack with one video offset in time?
Paul B Mahol
onemda at gmail.com
Thu Mar 4 23:57:35 EET 2021
On Thu, Mar 4, 2021 at 9:36 PM Steven Kan <steven at 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.
>
> and they all result in both halves of the video doing nothing until they
> both start together, at a burned-in timestamp of 01:11:07. So I apparently
> have the syntax slightly wrong, or I’m using the wrong flag. Thanks!
>
> ffmpeg -i
> /Users/steven/Downloads/Record/DownLoad/TrailDown_ch1_20210304010952_20210304011838.mp4
> -itsoffset -50 -i
> /Users/steven/Downloads/Record/DownLoad/TrailUp_ch1_20210304010838_20210304011506.mp4
> -filter_complex 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]
> File 'Coyote2Up.mp4' already exists. Overwrite? [y/N] y
> Stream mapping:
> Stream #0:0 (h264) -> hstack:input0
> Stream #1:0 (h264) -> hstack:input1
> hstack -> Stream #0:0 (libx264)
> Press [q] to stop, [?] for help
> [libx264 @ 0x7fcf14806400] using cpu capabilities: MMX2 SSE2Fast SSSE3
> SSE4.2 AVX FMA3 BMI2 AVX2
> [libx264 @ 0x7fcf14806400] profile High, level 6.0, 4:2:0, 8-bit
> [libx264 @ 0x7fcf14806400] 264 - core 161 r3027 4121277 - H.264/MPEG-4 AVC
> codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options:
> cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1
> psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1
> cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12
> lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0
> bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
> b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=20
> scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0
> qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
> Output #0, mp4, to 'Coyote2Up.mp4':
> Metadata:
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf58.65.100
> Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(progressive),
> 5184x1944, q=2-31, 20 fps, 10240 tbn (default)
> Metadata:
> encoder : Lavc58.115.102 libx264
> Side data:
> cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
> frame= 1381 fps=5.9 q=-1.0 Lsize= 131831kB time=00:01:08.90
> bitrate=15674.3kbits/s speed=0.294x
> video:131812kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: 0.014291%
> [libx264 @ 0x7fcf14806400] frame I:6 Avg QP:17.32 size:2250843
> [libx264 @ 0x7fcf14806400] frame P:458 Avg QP:19.74 size:235443
> [libx264 @ 0x7fcf14806400] frame B:917 Avg QP:28.78 size: 14871
> [libx264 @ 0x7fcf14806400] consecutive B-frames: 3.8% 19.4% 11.1% 65.7%
> [libx264 @ 0x7fcf14806400] mb I I16..4: 3.0% 19.9% 77.1%
> [libx264 @ 0x7fcf14806400] mb P I16..4: 0.2% 0.7% 0.7% P16..4: 37.1%
> 4.7% 4.9% 0.0% 0.0% skip:51.7%
> [libx264 @ 0x7fcf14806400] mb B I16..4: 0.0% 0.1% 0.0% B16..8: 26.8%
> 1.4% 0.5% direct: 0.3% skip:70.8% L0:42.8% L1:55.8% BI: 1.3%
> [libx264 @ 0x7fcf14806400] 8x8 transform intra:33.8% inter:16.1%
> [libx264 @ 0x7fcf14806400] coded y,uvDC,uvAC intra: 91.5% 0.0% 0.0% inter:
> 7.8% 0.0% 0.0%
> [libx264 @ 0x7fcf14806400] i16 v,h,dc,p: 26% 17% 30% 27%
> [libx264 @ 0x7fcf14806400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 15% 21% 6%
> 7% 8% 7% 8% 9%
> [libx264 @ 0x7fcf14806400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 15% 13% 7%
> 9% 10% 9% 8% 9%
> [libx264 @ 0x7fcf14806400] i8c dc,h,v,p: 100% 0% 0% 0%
> [libx264 @ 0x7fcf14806400] Weighted P-Frames: Y:0.0% UV:0.0%
> [libx264 @ 0x7fcf14806400] ref P L0: 83.8% 4.9% 10.1% 1.2%
> [libx264 @ 0x7fcf14806400] ref B L0: 93.1% 6.8% 0.2%
> [libx264 @ 0x7fcf14806400] ref B L1: 95.3% 4.7%
> [libx264 @ 0x7fcf14806400] kb/s:15637.92
>
>
> --
> Steven "Rocket Man" Kan #```````
> mailto:steven at kan.org # ```````
> http://www.kan.org # ```````
> aim://stevenkan@me.com # ```````
> # ```````
> ~ ~ . \_ at _/ ```````
> ^_@ o . V ```````
> `-' - \_ at _ ~ . ######
> V \ ~ . ######
> ~ . #H2O##
> ~ . #POLO#
> Blood, sweat, and chlorine ~ ~ ######
>
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