On 2/22/2026 4:22 AM, Bouke / Videotoolshed via ffmpeg-user wrote:
Not real help, but what are you trying to do? ‘Freeze’ is either an
effect, or a TBC kicking in on a major problem, or just ’nothing is
happening in the shot, everyone is out or asleep’. Workaround could be
to use scene (should be called shot) detection with some ridiculous
conservative params. Bouke
I am trying to use freezedetect to count the number of times that there
is a freeze in the video. If the output of freezedetect can notify me
each time a freeze is detected, then I can manually count the
notifications. So for example, if frame 1000, 1001, and 1002 are
identical, this should count as the first freeze. Then if frame 1500
is identical to frame 1501, this should count as the second freeze.
Etc. It is helpful for me if the output can tell me the exact frame
number of the frozen frames. For example, if the frozen frame begins at
frame 1000 and ends at frame 1002, it is helpful if the output can tell
me that frame 1000 is frozen for a total length of 2 frames.
if the video is 30 frames per second, then frame 1000 would appear at 33
seconds, and frame 1500 would appear at 50 seconds.
The output of freezedetect is giving me numerous outputs like this...
Each time, the hex number after h264 @ is changing:
[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.
I don't understand what is the significance of "000001e8f6e15d80". Is
"000001e8f6e15d80" a frame count number? This number is too big to be a
frame count number. 000001e8f6e15d80 = 2100086005120 frames? =
70002866837 seconds?
https://ffmpeg.org/ffmpeg-filters.html#freezedetect
C:\Users\meow\Downloads\ffmpeg\bin>ffmpeg -i 21feb360.mp4 -vf
"freezedetect=n=-60dB:d=1" -map 0:v:0 -f null -
duration, d
Set freeze duration until notification (default is 2 seconds).
It sounds like if I set d to 1, then duration until notification will be
1 second (30 frames.) However, this is not explained very clearly in
the documentation. I am asking, if I set d to 1, then will the duration
until notification be 1 second OR LESS, i.e., 2 frames?
Thanks,
-Elliot
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