Error messages preventing coversion and then import into Cinema Stack

I was following along the instructions to get a Cinema Stack working but got stuck on the Miro Conversion. Whenever I set it to either MPEG-4 or WebM I get this really long error message. It was from a video I exported from the Photos app. I wonder why my video was different then the one in the tutorial that converted right away?

ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers built on Sep 9 2012 14:24:14 with clang 4.0 ((tags/Apple/clang-421.0.60)) configuration: --prefix=/Users/glee/src/miro-binary-kit-osx/binary-kit/ffmpeg/src/build/x86_64 --yasmexe=/opt/local/bin/yasm --enable-static --enable-shared --enable-gpl --enable-version3 --enable-libmp3lame --enable-pthreads --enable-libvorbis --enable-libx264 --enable-libxvid --enable-libspeex --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-libvpx --enable-libvorbis --enable-libtheora --enable-memalign-hack --disable-debug --disable-stripping --arch=x86_64 --enable-cross-compile --target-os=darwin --cc=clang --cxx=clang++ libavutil 51. 54.100 / 51. 54.100 libavcodec 54. 23.100 / 54. 23.100 libavformat 54. 6.100 / 54. 6.100 libavdevice 54. 0.100 / 54. 0.100 libavfilter 2. 77.100 / 2. 77.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 15.100 / 0. 15.100 libpostproc 52. 0.100 / 52. 0.100[mov,mp4,m4a,3gp,3g2,mj2 @ 0x103809420] Stream #1: not enough frames to estimate rate; consider increasing probesize[mov,mp4,m4a,3gp,3g2,mj2 @ 0x103809420] Stream #2: not enough frames to estimate rate; consider increasing probesize[mov,mp4,m4a,3gp,3g2,mj2 @ 0x103809420] Could not find codec parameters (Video: none (hvc1 / 0x31637668), 1920x1080, 11208 kb/s)Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ‘/Users/KipV/Sites/The Present Can Be 2020.Life/June/IMG_6931.mov’: Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2023-09-11 18:47:41 Duration: 00:00:18.82, start: -39.100000, bitrate: 11248 kb/s Stream #0:0(und): Video: none (hvc1 / 0x31637668), 1920x1080, 11208 kb/s, SAR 1:1 DAR 16:9, 30.01 fps, 30 tbr, 600 tbn, 600 tbc Metadata: creation_time : 2023-09-11 18:47:41 handler_name : Core Media Data Handler Stream #0:1(und): Data: none (mebx / 0x7862656D) Metadata: creation_time : 2023-09-11 18:47:41 handler_name : Core Media Data Handler Stream #0:2(und): Data: none (mebx / 0x7862656D) Metadata: creation_time : 2023-09-11 18:47:41 handler_name : Core Media Data Handler Stream #0:3(und): Data: none (mebx / 0x7862656D) Metadata: creation_time : 2023-09-11 18:47:41 handler_name : Core Media Data Handler[buffer @ 0x600002c01fa0] Invalid pixel format '-1’Error opening filters!

I was also wondering about using stock video for one page partially to get around the conversion problem. Has stock footage worked well in cinema stack in anyone’s experience? Or maybe the stock video doesn’t come with a WebM format?

If there is another way to convert videos, using another program that doesn’t get errors, I could try that too.