[FFmpeg-user] Extracting frames from 59.94 FPS video - only every other frame is different
gyandoshi at gmail.com
Fri Dec 1 21:58:15 EET 2017
On 12/1/2017 10:42 PM, Will Price wrote:
> I'm having a strange problem when extracting frames from a video recorded from a GoPro HERO 5 Black camera (1080p, 60FPS, Linear FOV). When I view the extracted frames it appears that every two frames is a duplicate of one another, i.e. frames 1 and 2 look the same, frame 3 shows a change, but frame 4 again looks the same as 3.
Mostly a duplicate.
ffprobe GOPR0325.MP4 -show_entries packet=pts_time,size -select_streams
v -read_intervals %+#20 -of compact
Every other frame's size looks to be much smaller. The first frame is an
I-frame and all others are P-frames. When x264 repeats a frame, the size
is usually up to a few hundred bytes.
Is the camera truly registering 60 times a second?
More information about the ffmpeg-user