1
vote
1answer
66 views

ffmpeg does not recognize any audio filters

I am trying to reduce noise from the audio files I extracted from videos. The objective is to recognize speech so I was trying to filter out the frequencies above 300 and below 3000hz. I tried to use ...
0
votes
0answers
74 views

Add background music at specific time period in mp3 files using ffmpeg?

I want to add background music after every 5 seconds in .mp3 file using ffmpeg. I have 2 audio files : input1.mp3 of 5 seconds and input2.mp3 of 4 minutes 04 seconds. I want to add input1.mp3 after ...
1
vote
0answers
310 views

Scale (or center) watermark with ffmpeg to same resolution as output file

I want to have the watermark scaled to the same resolution as the output file. How do I do this? Alternatively, how do I center the watermark in the middle of the output instead? Here is what I have: ...
0
votes
0answers
74 views

Delete file if silence detect?

I'm using this filter "-af silencedetect=n=-30dB:d=2" in FFmpeg, and I'd like to know if is there a option or argument if was detected silence in audio don't generate it, if someone know how or know ...
2
votes
1answer
213 views

ffmpeg does not apply watermark on first generated frame (wm is applied on all other frames)

I am generating a bunch of jpgs from a movie, and want the watermark to be applied to all the jpgs. This works fine for all frames, but the first one, and I cannot figure out why. This is the command ...
0
votes
1answer
4k views

How to deinterlace at double frame rate with ffmpeg + yadif? 50i -> 50p

I'm trying to figure out how to use yadif / yadif-2x with ffmpeg to convert 50i source material into 50p output that preserves the motion of all fifty fields per second. Right now, I am using the ...
1
vote
1answer
660 views

ffmpeg Issue With setpts/asetpts and/or select/aselect

As a follow-up to this question I'm now fighting with the synchronous editing of the video and audio. I still try to cut the video by frames. While the resulting timestamps seem to be correct on the ...
3
votes
1answer
565 views

ffmpeg's select-filter generates unwanted black frames

I want to cut a video by frames with ffmpeg. What I came up with so far is ffmpeg -i P2.mp4 -vf "fps,setpts='PTS-STARTPTS',select='gte(n\,20)*lte(n\,30)',crop='600:430:100:650',scale='280:-1'" ...
1
vote
1answer
603 views

mixing transparent FLV video and background-image with FFMPEG

I'm having a hard time mixing a background png with a transparent flv. I scale and crop an flv video with filter_complex, and then i want to overlay it on a background png. When I put the png in the ...
1
vote
1answer
2k views

Multiple video filters in FFmpeg

I want to add a PNG watermark and then scale my video. I may add more filters. This is my FFmpeg command. sweb@sweb-laptop:/tmp$ ffmpeg -i Wildlife.wmv -sn -acodec libvorbis -vcodec libvpx -b:a 128k ...
0
votes
1answer
413 views

How do I install the “fade” filter for FFmpeg?

There is documentation for the "fade" filter, but I don't know how to install it. I'm using CentOS. I've installed FFmpeg from RMPForge: yum install ffmpeg
1
vote
0answers
686 views

Fade in a movie from white with FFmpeg

I have an AVI file and I want to create a fade effect, BUT I want the fade-in to begin with the color white, meaning I want the first frame to be white and the movie should slowly (and continously) ...