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FFmpeg is a free software project that produces libraries and programs for handling multimedia data. The most notable parts of FFmpeg are libavcodec, an audio/video codec library used by several other projects, libavformat, an audio/video container mux and demux library, and the ffmpeg command line program for transcoding multimedia files.
2,182 questions
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How to get accurate rgb -> yuv color conversion in ffmpeg
There is a way to get highly accurate YUV -> RGB color conversion.
You can test it on a yuv video.
ffmpeg -i <YUV_Source> -vf zscale=min=709,format=gbrp -vframes 1 out.png
Since PNG is ...
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Can you adjust bayer scale with `-sws_dither bayer`?
in ffmpeg with the paletteuse filter you can use paletteuse=dither=bayer:bayer_scale=[0-5] which allows you to adjust the bayer scale.
But with -sws_dither bayer I have not found an option equivalent ...
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VFR input + h264_nvenc - output bitrate is based on initial frame rate when I want it to be time-based
I have 2 source files with a duration of 30 seconds and a time base of 1/1000.
The first is at a constant 60fps, the second has a mixed frame rate, starting at 25fps for exactly 5 seconds then ...
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how can I sync live vfr video with live audio for livestream?
I'm trying to extract live video out of an offscreen OpenGL renderer I programed with OSMesa and combine it with live audio made with SuperCollider.
I'm piping my renderer directly to ffmpeg using the ...
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Is it possible to color correct vaapi encode when capturing screen with kmsgrab?
I have this command to record my screen with vaapi on linux:
ffmpeg -y -device /dev/dri/card1 -f kmsgrab -i - -vf 'hwmap=derive_device=vaapi,scale_vaapi=format=nv12' -c:v h264_vaapi -qp 24 output.mkv
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Problem with seeking with FFmpeg with two sources (video + audio)
I'm having this problem with FFmpeg. I'm combining video and audio from two different files (video - reencode, audio - copy):
ffmpeg -i avisynth.avs -i audio.mp4 -map 0:v -map 1:a -c:v libx264 -c:a ...
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How to precisely overlay in ffmpeg, with milliseconds precision?
Hello Dear Ffmpeg Friends,
Would you be so kind to explain, how to precisely do the overlays — with milliseconds precision, in FFmpeg 7.1.1 please? :)
I have the 3-rows-subtitles "Test200_800....
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Can ffmpeg use better upscaling algorithms than lanczos?
Sometimes you want to prescale a video rather than letting the player scale it realtime, there can be a wide variety of reasons for this and using lanczos is the easiest way to get decent basic ...
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FFMPEG: how to process a raw video where frames start at a specific byte offset and gaps?
i am trying to convert a raw video into lossless video that is playable by VLC or QuickTime.
The structure of the input video:
pixels are 8-bit grayscale
frame size is 1280x1024 pixels
frames start ...
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Is this a problem in my command, the stream, or FFMPEG itself?
I am not sure if this is the correct Stack Exchange site for this question. I originally posted it on Stackoverflow, but looks like it will be closed there as "off-topic".
I am trying to ...
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73
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How to prevent FFmpeg from adding 'encoder=Lavf...' metadata to MP4 output?
I'm using FFmpeg to record or re-encode videos to MP4 format, and I want to completely remove all encoder metadata, especially the "encoder": "Lavf..." entry that shows up in the ...
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concat ffmpeg filter outputs wrong timebase, xfade cannot be used
I'm trying to join several videos (removed for testing purposes) and images using xfade. In some cases, I don't want to use any transition, so instead of using xfade filter I'm using concat filter.
...
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FFmpeg trim: -to as input option VS -to as output option
Command 1:
> ffmpeg -ss 01:00 -to 02:00 -i "input.mp4" "output.mp4"
Cuts from 01:00 to 02:00.
Command 2:
> ffmpeg -ss 01:00 -i "input.mp4" -to 02:00 "output....
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How can i burn in the current video playback percentage on to a video stream using FFMpeg
I've taken alook at the drawtext filter in ffmpeg and it offers the ability to burn in the current local time directly on to the video stream. I would like this sort of behaviour but for a integer ...
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FFmpeg NVENC: overlay_cuda filter produces jittery video
Problem:
I'm trying to produce picture-in-picture videos with FFmpeg utilizing nVidia's CUDA capabilities to speed up the encoding process during the whole processing pipeline.
My command processes ...
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