[FFmpeg-user] Query

Hari Babu Muga haribabu.muga at quantiphi.com
Wed Jan 9 11:32:19 EET 2019

Thanks for the earliest reply!!

The following are the commands that I used for different operations.

1) For extracting all frames from the video:
ffmpeg -i video.mpg frames/frame%06d.jpg

2) For extracting resized all frames from the video:
ffmpeg -i video.mpg -vf scale=640:-2 frames/frame%06d.jpg

3) For reading total number of frames in a video:
ffprobe -v error -count_frames -select_streams v:0 -show_entries
stream=nb_read_frames video.mpg

Input format of the videos that I am using are: mpg, mp4, mov, flv
Output formats are: mp4 for video and jpg for an image.


On Tue, Jan 8, 2019 at 10:07 PM Carl Zwanzig <cpz at tuunq.com> wrote:

> On 1/8/2019 1:15 AM, Hari Babu Muga wrote:
> > When I read a video for knowing the total number of frames present in it,
> > ffmpeg gives me 'x' count but when I actually extracted the frames using
> > ffmpeg, it gave me 'x+3' frames. and the additional number of frames that
> > are coming are variable with respect to the format of the video. Kindly
> > tell me why this is happening.
> Hard to tell much without the complete command line you're using, please
> include that.
> Regarding formats- if you're pulling from a lossy format, such as mpeg,
> and
> the selected frame isn't a "B" frame, you may get the extras. What's the
> export format? video or image?
> Later,
> z!
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