[FFmpeg-user] Overlapping frames issue with -seek_frames_individually set to false

[Alex MacLean]

Hello,

I am struggling with ffmpeg to generate thumbnails for video files. We have
to use `-seek_streams_individually false` because setting it to true takes
far too long to retrieve frames near the end of longer content (> 30s
runtime for content > 1h30m).

Here is the command we currently have:

ffmpeg -y -nostdin -copyts -seek_streams_individually false -ss 15.1 -i
COMMCON.mp4 -vframes 1 -vsync 0 -c:v libwebp output.webp

And the resulting thumbnail is attached (we have found overlapping frames
around frames 451-456 for this content). What do you think? Any idea how
we  might be able to fix this issue and get a single frame in the result?

Thank you,
Alex MacLean
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