ffmpeg freezedetect filter output

[arianaa30]

Summary of the bug:
The ffmpeg freeze output is expected to output intervals of detections always with start-duration-end tags. But we see sometimes, start tag is missing, and duration shows right after previous end. For development purposes, it is best to always have a start, even if start is equal to previous end.

Example command:

 ffmpeg -i freeze.mp4 -vf "freezedetect=n=-60dB:d=0.1" -map 0:v:0 -f null -

How to reproduce:

% ffmpeg -i input ... output
ffmpeg version N-93649-gd0ca749adb Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8.3.1 (GCC) 20190414

[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_start: 0
[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_duration: 0.9009
[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_end: 0.9009
[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_duration: 0.1001
[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_end: 1.001
[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_start: 5.005
[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_duration: 2.03537
[freezedetect @ 0000016df6c06a00] lavfi.freezedetect.freeze_end: 7.04037

[Carl Eugen Hoyos]

Please provide your command line together with the complete, uncut console output and an input sample that allows to reproduce the issue to make this a valid ticket.

[arianaa30]

File: ​https://www.dropbox.com/s/h9hi9se6srmlp5p/freeze.mp4?dl=0

Command:

 ffmpeg -i freeze.mp4 -vf "freezedetect=n=-60dB:d=0.1" -map 0:v:0 -f null -

[Marton Balint]

Please test the patch I submitted to ffmpeg-devel:

​https://patchwork.ffmpeg.org/patch/12961/

[arianaa30]

Thanks. It's good. Please push to master towards a static version.

[Carl Eugen Hoyos]

Fixed by Marton in 328a96839d4d953285f9875b217bebaa5fd783b0