0
votes
0answers
16 views

ffmpeg overlay rotated images onto a video, how to transparent the output area not covered by the rotated image?

I am using ffmpeg to overlay a picture on a movie. The requirement is to rotate the picture through an arbitrary angle. Using filter_complex, I can overlay the rotated picture now. However, the output ...
1
vote
1answer
107 views

Video file created with FFmpeg too big

In my C# project I capture the screen at regular intervals (with a timer). I then have to convert the images into one video with FFmpeg, so I use this command: "-f image2 -framerate 9 -i ...
2
votes
1answer
95 views

Multiple Image Sequences thumbnailed on one image plane. (FFMPEG)

I am asking this question, as i couldn't find anything similar to my problem. I would like to read different image sequence streams and put it "thumbnailed" to a new image stream. From the example ...
0
votes
0answers
141 views

Adding Border to the image using FFmpeg

I wish to add a border to the single strip of images, using FFMPEG. I have been trying to search this thing on google, I tried this command ffmpeg -i input.jpg -vf "draw box= : x=50 : y=10 : w=104 : ...
0
votes
0answers
75 views

Getting the same number of frames/images from a video stream that I originally put in

I am using ffmpeg in a winform application. In my scenario I take 20 sparate jpeg images and add them to a ogg file. I then extract all the images from that ogg file (as a test). Despite making sure ...
0
votes
1answer
179 views

Normalise levels, contrast, brightness of an image sequence

When making animated gifs or short stop-motion videos from an image sequence, I want them to have all similar levels so that the output looks smooth. It does not have to be a professional quality ...
2
votes
2answers
3k views

ffmpeg to capture stills from H.264 stream

I'm trying to capture still images from an H.264 wireless IP camera using ffmpeg. I found a similar question here: How can I extract a good quality JPEG image from an H264 video file with ffmpeg? ...
2
votes
1answer
154 views

Find video file position using an image match

What would be the best tool / method to automatically find a position from an video file, where the frame approximately matches* a given image? Basically, a command to: "Find the position where ...
1
vote
1answer
957 views

FFMPEG for animation of image files outputs all-black video

I am trying to create an animation of a few images ("f_01.png", "f_02.png", ..., "f_08.png") that are each a different solid colour, but it always outputs a video entirely made up of black frames. ...
2
votes
3answers
386 views

Can ffmpeg encode video from frames of different sizes?

I have a toolchain that produces frames that are usually 1920x1080, but occasionally 1919x1080 or 1920x1079. (Yes, this is a bug. Please read on.) When ffmpeg encodes a video from it, with a ...
0
votes
2answers
871 views

Combine multiple images to form a strip of images ffmpeg

I wish to combine multiple images into a single strip of images, using FFMPEG. I have been trying to search this thing on google, but unable to find anything useful. All links take me to places ...
3
votes
1answer
1k views

FFMPEG image sequence with various durations

Let's say I have an mp3 file of 1 minute length. And I have 20 png images. I want to combine these images and an audio into a video file, but I do not want each image to last 3 seconds on screen, I ...
4
votes
1answer
1k views

FFmpeg filter to rotate image through arbitrary angle

I need to produce timelapse video from a webcam that was mounted at a slightly off-vertical angle, and I need to rotate the image about 3 degrees counter-clockwise. (The webcam is in a virtually ...
3
votes
1answer
823 views

ffmpeg: How to create cropped thumbnails?

For creating a video thumbnail with ffmpeg I'm using this command: ffmpeg -itsoffset -4 -i video.mp4 -vframes 1 thumb.jpg This gives me a thumbnail with the same size of the video (which has an ...
0
votes
0answers
90 views

Converting image format to jpeg using ffmpeg

Before I ask I want to say that I know about ImageMagick and the other image processing tools but I explicitly need to use ffmpeg. So, can someone tell me if there's a way to use ffmpeg to convert an ...
2
votes
1answer
359 views

ffmpeg thumbnails with exact size main aspect ratio

Hi need to get one thumbnail with resolution 560x420. I'm using this command: ffmpeg -i "file.mp4" -vf "scale=560:-1,pad=max(iw\,ih):420:(ow-iw)/2:(oh-ih)/2" \ -frames:v 1 best.png This command ...
0
votes
1answer
385 views

Extracting images from video in 1 minute intervals

I would like to extract images from a video Exp01.avi, the video is 24fps and 25 minutes long. I want the images to be extracted from the video after every 1 minute interval. Please someone tell me ...
2
votes
0answers
243 views

Conversion of sequence of PNGs to movie using ffmpeg on Fedora 18

I have a series of PNG images called Temp01.png, Temp02.png, ..., Temp99.png which I am attempting to convert into a movie using ffmpeg. I am using the command: ffmpeg -i Temp%02d.png -f avi -vcodec ...
1
vote
0answers
405 views

Creating video from DNG images with FFmpeg

I'm trying to make a video from TIFF images that are DNG pictures. The problem is that the resulting video that FFmpeg creates, have a resolution lower than the original pictures I tried with image2 ...
0
votes
1answer
547 views

Creating a movie from pdf images

I have a bunch of pdf files, from which I want to produce a movie. I'm using sips (on Mac OS) to convert the pdfs to .png, and then produce the movie with ffmpeg. So far, I'm doing this: for i in ...
0
votes
2answers
1k views

Converting hundreds of pictures of naming style “frame_0000.jpg”, “frame_0001.jpg” into an avi?

I have all of these images as jpegs and I want to stream them into an AVI. I am trying to use ffmpeg with the command noted here but I get an error "No such file or directory". My exact command is ...
0
votes
0answers
2k views

ffmpeg watermark: problem using movie filter

I want to overlay an image (preferably one with transparency, so only certail shape of it is overlayed) on a video. I came across this old method, which does not work for me (I can't find vhook ...
15
votes
8answers
25k views

How to convert video to images?

How can I convert a video file to a sequence of images, for example one frame every N seconds. Can mplayer or ffmpeg do this? I have used MPlayer to grab screenshots manually but I would like to ...