Questions tagged [ffmpeg-filters]
Used for question that need help with FFmpeg's filters (i.e. a parameter specified by the -filter, -vf and -af options)
51
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FFMPeg: Avoiding clipping of image when rotating overlay
Im trying to add an image overlay on top of a video and have to rotated the image arbitrarily.
Below is the command I'm using to rotate by -30 deg.
ffmpeg -i input_video.mp4 -i crown.png -...
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65
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Bug in FFmpeg signature?
I tried using the signature filter on two completely different videos.
For below command where video1 and video2 are completely different videos, the signature filter code still passes the coarse ...
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answer
620
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Error submitting a packet to the muxer: Cannot allocate memory
I'm attempting to trim and concatenate several video files using ffmpeg. These videos have already been transcoded with H.264 at a resolution of 720p. However, when executing the command, I encounter ...
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Pausing the video for 15 seconds
I have a video which is 40 seconds long, I want to make it 55 seconds long, I wanted that the video's first frame along with it's audio freezes (frame freezes) for the first 15 seconds and after the ...
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FFMPEG - Any suggestions on how to achieve a lookahead with sidechaincompress?
I need sidechaincompress (i'll call it SCC) to look ahead 750ms and smoothly drop the audio level in that lookahead window.
I'm currently using this:
-filter_complex "0:a]sidechaincompress=...
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Use font attachment from an mkv container when burning hard subtitles
I want to use the font that is in an mkv as an attachment when I burn in subtitles.
I found a way to do this using -dump_attachment first.
ffmpeg -dump_attachment:t "" -i video.mkv
ffmpeg -i ...
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215
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concatenating multiple files is giving Non-monotonic DTS in output stream error
I am trying to concatenate multiple video files with ffmpeg and python with the following code :-
def story(path):
videos = [f for f in os.listdir(path) if f.endswith(".mp4")]
print(videos)
...
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How to extract keyframe timestamps from video using ffmpeg
I want to extract the timestamps of keyframes from a video using ffmpeg. I found this thread that explains pretty much how to do it.
However, it appears that my video does not have the pkt_pts_time ...
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answer
93
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Splitting, trimming, converting to image and concatenating issues with FFmpeg
I am new to FFmpeg. I read some essential basics but cannot figure out why the following command does not work. The script is written in Windows in PowerShell.
ffmpeg -hide_banner `
-loop 1 -t 3 -i ...
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1
answer
487
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Adding timer to video using FFmpeg
I'm trying to find a way to add a countdown text to videos using FFmpeg.
I want the text to be "Time left: mm:ss" but to avoid leading zeros for minutes.
So, for example:
Time left: 10:01
...
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answer
333
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FFmpeg add text in a box with rounded corners
Is there a way to add a text with countdown timer to a video using FFmpeg where the text is contained in a semi-transparent box with rounded corners with one of the side borders in a different color?
...
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66
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Side-by-side Comparison with scale2ref & hstack: Wrong Content Received as Output
I have two videos (no other streams there) with a format of 1440x1080. The first video should be positioned left to the second (at the right), whilst the second must be rotated by 90° clockwise (...
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350
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Flip video with hardware acceleration ffmpeg on Windows 11
I am trying to use hardware acceleration to horizontally flip videos but I can't seem to get it right. I don't want to change the codec but just keep the same (just hflipped).
I am using Intel Arc Pro ...
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1
answer
137
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Overlay a different png for each single frame of a video
I have a video and a set of images (each image for one video frame) I want to overlay the images over the video, each image over one single frame. The images and the video have the same size. I know ...
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FFmpeg frame counter + resolution/bitrate/FPS box
I was trying to use drawtext FFmpeg filter to insert a frame counter at the bottom of my video by using this command:
ffmpeg -i input.mp4 -vf "drawtext=fontfile=C\\:/Windows/fonts/consola.ttf: ...