When running freezedetect on the file 21feb360.mp4 I receive numerous
times the error "Late SEI is not implemented."
Following the suggestion which was automatically provided with this
error message, I have uploaded the file 21feb360.mp4 to
https://streams.videolan.org/upload/
The file 21feb360.mp4 contains numerous "frozen" frame sequences which
are frozen for the duration of 2 frames which is the shortest possible
duration for a sequence of "frozen" frames. My objective is to count
the total number of "frozen" frame sequences in this video file.
I am a little uncertain about the function of the freezedetect function
because the documentation for this function seems to be incomplete as
provided here:
https://ffmpeg.org/ffmpeg-filters.html#freezedetect
In particular, I was wondering how I could ask the freezedetect function
to detect sequences of frozen frames that last for less than 1 second in
duration. It seems that d=1 might have the effect of detecting frozen
frame sequences that are less than or equal to 1 second?
I appreciate any information you can provide to help me understand the
below output. I assume that every instance of the "Late SEI is not
implemented" error might represent another sequence of frozen frames,
but I am not sure.
I hope uploading this sample file 21feb360.mp4 might be of some help to
the ffmpeg project.
Thanks for your help and advice,
-Elliot
In the following, I am running ffmpeg-2026-02-18-git-52b676bb29-full_build.
Processor Intel(R) Core(TM) i7-4600U CPU @ 2.10GHz 2.70 GHz
Installed RAM 12.0 GB
Storage 932 GB SSD WDC WDBNCE0010PNC
Graphics Card NVIDIA GeForce GT 720M (2 GB), Intel(R) HD Graphics
Family (113 MB)
System Type 64-bit operating system, x64-based processor
Edition Windows 10 Pro
Version 22H2
Installed on 1/29/2021
OS Build 19045.6466
*C:\Users\meow\Downloads\ffmpeg\bin>ffmpeg -i 21feb360.mp4 -vf
"freezedetect=n=-60dB:d=1" -map 0:v:0 -f null -*
ffmpeg version 2026-02-18-git-52b676bb29-full_build-www.gyan.dev
Copyright (c) 2000-2026 the FFmpeg developers
built with gcc 15.2.0 (Rev11, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static
--disable-w32threads --disable-autodetect --enable-cairo
--enable-fontconfig --enable-iconv --enable-gnutls --enable-lcms2
--enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-libdvdnav --enable-libdvdread --enable-sdl2
--enable-libaribb24 --enable-libaribcaption --enable-libdav1d
--enable-libdavs2 --enable-libopenjpeg --enable-libquirc
--enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-liboapv
--enable-libqrencode --enable-librav1e --enable-libsvtav1
--enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom
--enable-libjxl --enable-libsvtjpegxs --enable-libvpx
--enable-mediafoundation --enable-libass --enable-frei0r
--enable-libfreetype --enable-libfribidi --enable-libharfbuzz
--enable-liblensfun --enable-libvidstab --enable-libvmaf
--enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid
--enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec
--enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi
--enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl
--enable-libcdio --enable-openal --enable-libgme --enable-libmodplug
--enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame
--enable-libshine --enable-libtheora --enable-libtwolame
--enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc
--enable-libgsm --enable-liblc3 --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa
--enable-libbs2b --enable-libflite --enable-libmysofa
--enable-librubberband --enable-libsoxr --enable-chromaprint
--enable-whisper
libavutil 60. 25.100 / 60. 25.100
libavcodec 62. 23.103 / 62. 23.103
libavformat 62. 9.101 / 62. 9.101
libavdevice 62. 2.100 / 62. 2.100
libavfilter 11. 12.100 / 11. 12.100
libswscale 9. 3.100 / 9. 3.100
libswresample 6. 2.100 / 6. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '21feb360.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Whitchurch Canal Breach Update, A Very Busy Week!
With Commentary (21stFeb)
artist : Kieran & Lottie Photography
date : 2026
encoder : Lavf58.39.101
comment : https://www.youtube.com/watch?v=HMNLPSjC6OM
Duration: 00:11:28.82, start: 0.000000, bitrate: 535 kb/s
Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661),
yuv420p(tv, bt709, progressive), 640x360 [SAR 1:1 DAR 16:9], 399 kb/s,
29.97 fps, 29.97 tbr, 30k tbn (default)
Metadata:
handler_name : ISO Media file produced by Google Inc.
Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : ISO Media file produced by Google Inc.
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
Press [q] to stop, [?] for help
[h264 @ 000001e8f6e18600] Late SEI is not implemented. Update your
FFmpeg version to the newest one from Git. If the problem still occurs,
it means that your file has a feature which has not been implemented.
[h264 @ 000001e8f6e18600] If you want to help, upload a sample of this
file to https://streams.videolan.org/upload/ and contact the
ffmpeg-devel mailing list. ([email protected])
Output #0, null, to 'pipe:':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Whitchurch Canal Breach Update, A Very Busy Week!
With Commentary (21stFeb)
artist : Kieran & Lottie Photography
date : 2026
comment : https://www.youtube.com/watch?v=HMNLPSjC6OM
encoder : Lavf62.9.101
Stream #0:0(und): Video: wrapped_avframe, yuv420p(tv, bt709,
progressive), 640x360 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps,
29.97 tbn (default)
Metadata:
encoder : Lavc62.23.103 wrapped_avframe
handler_name : ISO Media file produced by Google Inc.
[h264 @ 000001e8f6e15d80] Late SEI is not implemented. Update your
FFmpeg version to the newest one from Git. If the problem still occurs,
it means that your file has a feature which has not been implemented.
[h264 @ 000001e8f6e15d80] If you want to help, upload a sample of this
file to https://streams.videolan.org/upload/ and contact the
ffmpeg-devel mailing list. ([email protected])
[h264 @ 000001e8f6e18600] Late SEI is not implemented. Update your
FFmpeg version to the newest one from Git. If the problem still occurs,
it means that your file has a feature which has not been implemented.
[h264 @ 000001e8f6e18600] If you want to help, upload a sample of this
file to https://streams.videolan.org/upload/ and contact the
ffmpeg-devel mailing list. ([email protected])
*/[114 more instances of the above error have been redacted here]/*
[out#0/null @ 000001e8f6ad0d00] video:8547KiB audio:0KiB subtitle:0KiB
other streams:0KiB global headers:0KiB muxing overhead: unknown
frame=20642 fps=1895 q=-0.0 Lsize=N/A time=00:11:28.75 bitrate=N/A
speed=63.2x elapsed=0:00:10.89
*C:\Users\meow\Downloads\ffmpeg\bin>*
_______________________________________________
ffmpeg-user mailing list -- [email protected]
To unsubscribe send an email to [email protected]
