Two questions about using FFmpeg on Debian

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There are a couple of questions about using FFmpeg.

I use Debian stable branch. I make separate caps from a video file. A very long time. I would like to understand how this can be optimized? What parameter should be set or group of parameters?

I have a video with a resolution of 1280×720, the time to create screenshots is about 5 minutes. It is too long. Maybe there is a special option for optimization?

I want to get a certain number of caps from the video. What parameter is responsible for this?

We are talking about individual frames from the video, they are also called screenshots. Ffmpeg needs to create a certain number of screenshots from a video file. For example, I have a video of 1 hour. You need to get 15 separate screenshots. It happens that individual screenshots should be taken every fourth minute of this video.

edited 11 hours ago

dirkt

8,39231120

asked yesterday

CarambaMamba

New contributor

1) probably faster way here: stackoverflow.com/questions/27568254/…. ffmpeg -ss 01:23:45 -i input -vframes 1 -q:v 2 output.jpg. And 2) Not sure what do You mean by caps, a properties, then use a tool called ffprobe. It included in ffmpeg package. just run ffprobe yourfile.
– NoAngel
yesterday

1

I see. So You need extract some frames from some files at specified time. Well, slightly modified command line does it: ffmpeg -ss 00:00:00.00.000 -i yourfile.mp4 -vframes 60 thumb%04d.jpg. This uses yourfile.mp4 (You may specify any file in any format supported by ffmpeg). -ss specify seek time, ffmpeg will start capture frames in sequence from here. Specify how many frames to capture after -vframes for example, 60. and finally output file pattern thumb%04d.jpg does thumb0001.jpg, thumb0002.jpg,...
– NoAngel
yesterday

1

Now You have many files, then run command above per file. I don't think ffmpeg can process many files at once in this mode.
– NoAngel
yesterday

1

Oops, try 01:00:00.000 hh:MM:ss.mmm hh hour MM minute ss second mmm millisecond.
– NoAngel
yesterday

1

please forgive me, but again we did not understand each other. we are talking about individual frames from the video, they are also called screenshots ffmpeg needs to create a certain number of screenshots from a video file. for example, I have a video of 1 hour. You need to get 15 separate screenshots. It happens that individual screenshots should be taken every fourth minute of this video.
– CarambaMamba
yesterday

|
show 7 more comments

up vote
0
down vote

favorite

There are a couple of questions about using FFmpeg.

I use Debian stable branch. I make separate caps from a video file. A very long time. I would like to understand how this can be optimized? What parameter should be set or group of parameters?

I have a video with a resolution of 1280×720, the time to create screenshots is about 5 minutes. It is too long. Maybe there is a special option for optimization?

I want to get a certain number of caps from the video. What parameter is responsible for this?

edited 11 hours ago

dirkt

8,39231120

asked yesterday

CarambaMamba

New contributor

1) probably faster way here: stackoverflow.com/questions/27568254/…. ffmpeg -ss 01:23:45 -i input -vframes 1 -q:v 2 output.jpg. And 2) Not sure what do You mean by caps, a properties, then use a tool called ffprobe. It included in ffmpeg package. just run ffprobe yourfile.
– NoAngel
yesterday

1

I see. So You need extract some frames from some files at specified time. Well, slightly modified command line does it: ffmpeg -ss 00:00:00.00.000 -i yourfile.mp4 -vframes 60 thumb%04d.jpg. This uses yourfile.mp4 (You may specify any file in any format supported by ffmpeg). -ss specify seek time, ffmpeg will start capture frames in sequence from here. Specify how many frames to capture after -vframes for example, 60. and finally output file pattern thumb%04d.jpg does thumb0001.jpg, thumb0002.jpg,...
– NoAngel
yesterday

1

Now You have many files, then run command above per file. I don't think ffmpeg can process many files at once in this mode.
– NoAngel
yesterday

1

Oops, try 01:00:00.000 hh:MM:ss.mmm hh hour MM minute ss second mmm millisecond.
– NoAngel
yesterday

1

please forgive me, but again we did not understand each other. we are talking about individual frames from the video, they are also called screenshots ffmpeg needs to create a certain number of screenshots from a video file. for example, I have a video of 1 hour. You need to get 15 separate screenshots. It happens that individual screenshots should be taken every fourth minute of this video.
– CarambaMamba
yesterday

|
show 7 more comments

up vote
0
down vote

favorite

There are a couple of questions about using FFmpeg.

I use Debian stable branch. I make separate caps from a video file. A very long time. I would like to understand how this can be optimized? What parameter should be set or group of parameters?

I have a video with a resolution of 1280×720, the time to create screenshots is about 5 minutes. It is too long. Maybe there is a special option for optimization?

I want to get a certain number of caps from the video. What parameter is responsible for this?

edited 11 hours ago

dirkt

8,39231120

asked yesterday

CarambaMamba

New contributor

There are a couple of questions about using FFmpeg.

I use Debian stable branch. I make separate caps from a video file. A very long time. I would like to understand how this can be optimized? What parameter should be set or group of parameters?

I have a video with a resolution of 1280×720, the time to create screenshots is about 5 minutes. It is too long. Maybe there is a special option for optimization?

I want to get a certain number of caps from the video. What parameter is responsible for this?

linux debian video ffmpeg

edited 11 hours ago

dirkt

8,39231120

asked yesterday

CarambaMamba

New contributor

edited 11 hours ago

dirkt

8,39231120

asked yesterday

CarambaMamba

New contributor

edited 11 hours ago

dirkt

8,39231120

edited 11 hours ago

dirkt

8,39231120

edited 11 hours ago

dirkt

8,39231120

asked yesterday

CarambaMamba

New contributor

asked yesterday

CarambaMamba

asked yesterday

CarambaMamba

New contributor

CarambaMamba is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

1) probably faster way here: stackoverflow.com/questions/27568254/…. ffmpeg -ss 01:23:45 -i input -vframes 1 -q:v 2 output.jpg. And 2) Not sure what do You mean by caps, a properties, then use a tool called ffprobe. It included in ffmpeg package. just run ffprobe yourfile.
– NoAngel
yesterday

1

I see. So You need extract some frames from some files at specified time. Well, slightly modified command line does it: ffmpeg -ss 00:00:00.00.000 -i yourfile.mp4 -vframes 60 thumb%04d.jpg. This uses yourfile.mp4 (You may specify any file in any format supported by ffmpeg). -ss specify seek time, ffmpeg will start capture frames in sequence from here. Specify how many frames to capture after -vframes for example, 60. and finally output file pattern thumb%04d.jpg does thumb0001.jpg, thumb0002.jpg,...
– NoAngel
yesterday

1

Now You have many files, then run command above per file. I don't think ffmpeg can process many files at once in this mode.
– NoAngel
yesterday

1

Oops, try 01:00:00.000 hh:MM:ss.mmm hh hour MM minute ss second mmm millisecond.
– NoAngel
yesterday

1

please forgive me, but again we did not understand each other. we are talking about individual frames from the video, they are also called screenshots ffmpeg needs to create a certain number of screenshots from a video file. for example, I have a video of 1 hour. You need to get 15 separate screenshots. It happens that individual screenshots should be taken every fourth minute of this video.
– CarambaMamba
yesterday

|
show 7 more comments

1) probably faster way here: stackoverflow.com/questions/27568254/…. ffmpeg -ss 01:23:45 -i input -vframes 1 -q:v 2 output.jpg. And 2) Not sure what do You mean by caps, a properties, then use a tool called ffprobe. It included in ffmpeg package. just run ffprobe yourfile.
– NoAngel
yesterday

1

I see. So You need extract some frames from some files at specified time. Well, slightly modified command line does it: ffmpeg -ss 00:00:00.00.000 -i yourfile.mp4 -vframes 60 thumb%04d.jpg. This uses yourfile.mp4 (You may specify any file in any format supported by ffmpeg). -ss specify seek time, ffmpeg will start capture frames in sequence from here. Specify how many frames to capture after -vframes for example, 60. and finally output file pattern thumb%04d.jpg does thumb0001.jpg, thumb0002.jpg,...
– NoAngel
yesterday

1

Now You have many files, then run command above per file. I don't think ffmpeg can process many files at once in this mode.
– NoAngel
yesterday

1

Oops, try 01:00:00.000 hh:MM:ss.mmm hh hour MM minute ss second mmm millisecond.
– NoAngel
yesterday

1

please forgive me, but again we did not understand each other. we are talking about individual frames from the video, they are also called screenshots ffmpeg needs to create a certain number of screenshots from a video file. for example, I have a video of 1 hour. You need to get 15 separate screenshots. It happens that individual screenshots should be taken every fourth minute of this video.
– CarambaMamba
yesterday

1) probably faster way here: stackoverflow.com/questions/27568254/…. ffmpeg -ss 01:23:45 -i input -vframes 1 -q:v 2 output.jpg. And 2) Not sure what do You mean by caps, a properties, then use a tool called ffprobe. It included in ffmpeg package. just run ffprobe yourfile.
– NoAngel
yesterday

I see. So You need extract some frames from some files at specified time. Well, slightly modified command line does it: ffmpeg -ss 00:00:00.00.000 -i yourfile.mp4 -vframes 60 thumb%04d.jpg. This uses yourfile.mp4 (You may specify any file in any format supported by ffmpeg). -ss specify seek time, ffmpeg will start capture frames in sequence from here. Specify how many frames to capture after -vframes for example, 60. and finally output file pattern thumb%04d.jpg does thumb0001.jpg, thumb0002.jpg,...
– NoAngel
yesterday

Now You have many files, then run command above per file. I don't think ffmpeg can process many files at once in this mode.
– NoAngel
yesterday

Oops, try 01:00:00.000 hh:MM:ss.mmm hh hour MM minute ss second mmm millisecond.
– NoAngel
yesterday

please forgive me, but again we did not understand each other. we are talking about individual frames from the video, they are also called screenshots ffmpeg needs to create a certain number of screenshots from a video file. for example, I have a video of 1 hour. You need to get 15 separate screenshots. It happens that individual screenshots should be taken every fourth minute of this video.
– CarambaMamba
yesterday

|
show 7 more comments

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