[FFmpeg-user] Calculation of duplicated video frames in live stream

[Dmitry Menshikov]

Hi!

I'm trying to detect duplication of video frames in live streams. Such
situation occurs when encoder can't encode stream at specified fps. I see
few frames with the same pkt_size. I know that there is filter to detect
similar frames but such technique looks like overkill.

The simplest solution I see is to compare crc of frames.

Is my idea right? Have ffprobe such option? Thank you very much!

P.S. Command I currently use: ffprobe -hide_banner -v error -show_frames
-show_entries frame=media_type,key_frame,pkt_pts_time -i rtmp://host/path
--
Yours truly, Dmitry Menshikov
http://dmenshikov.com
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[Dmitry Menshikov]

Any ideas?

Post by Dmitry Menshikov
Hi!
I'm trying to detect duplication of video frames in live streams. Such
situation occurs when encoder can't encode stream at specified fps. I see
few frames with the same pkt_size. I know that there is filter to detect
similar frames but such technique looks like overkill.
The simplest solution I see is to compare crc of frames.
Is my idea right? Have ffprobe such option? Thank you very much!
P.S. Command I currently use: ffprobe -hide_banner -v error -show_frames
-show_entries frame=media_type,key_frame,pkt_pts_time -i rtmp://host/path
--
Yours truly, Dmitry Menshikov
http://dmenshikov.com

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[Carl Eugen Hoyos]

Post by Dmitry Menshikov
I'm trying to detect duplication of video frames in live streams. Such
situation occurs when encoder can't encode stream at specified fps. I see
few frames with the same pkt_size. I know that there is filter to detect
similar frames but such technique looks like overkill.
The simplest solution I see is to compare crc of frames.

This is a good idea if you know that the frames are really identical
(and not just very similar), see the framecrc output format.

Carl Eugen
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