[FFmpeg-user] Public FFmpeg Docker images built with GitHub Actions

Just wanted to mention this in case it's helpful to anyone: https://hub.docker.com/r/runsascoded/ffmpeg These are Docker images I've built and published (from source releases as well as a few misc Git commits) using GitHub Actions on a fork of the GitHub FFmpeg mirror: https://github.com/runsascod

Re: [FFmpeg-user] Public FFmpeg Docker images built with GitHub Actions

On Mon, Dec 7, 2020 at 4:13 AM Nicolas George wrote: > Hi. > > Ryan Williams (12020-12-06): > > Just wanted to mention this in case it's helpful to anyone: > > https://hub.docker.com/r/runsascoded/ffmpeg > > > > These are Docker images I've built and

Re: [FFmpeg-user] Public FFmpeg Docker images built with GitHub Actions

On Mon, Dec 7, 2020 at 11:06 AM Carl Zwanzig wrote: > > What are the advantages of using a docker-based ffmpeg? Good question… I think these images could provide advantages, at least in some contexts, in terms of: • Reproducibility: • ensuring the same ffmpeg build + environment across mac

Re: [FFmpeg-user] Public FFmpeg Docker images built with GitHub Actions

Wow, I'd missed https://hub.docker.com/r/jrottenberg/ffmpeg / https://github.com/jrottenberg/ffmpeg somehow, looks much more polished+complete than what I've done, thanks for the pointer. I'll update my docs to mention it. ___ ffmpeg-user mailing list ffm

Re: [FFmpeg-user] Replacing First 90 Seconds of a Video with Silence or with Another Audio Clip

On Tuesday, 19 January 2016 02:13 Sam Logan wrote: > I have a video AVI file, "Video.avi", consisting of a video and an > audio track, and a separate audio file, "Audio.mp3". I want to do the > following two things: > > (1) > > First, I want to produce a version of the video, "OutputSilenced.av

Re: [FFmpeg-user] How to pan hozitonally on a video?

According to http://ffmpeg.org/ffmpeg-filters.html#crop the expression variables for t (time in seconds) and n (frame number) are available. # X distance per frame = (400 - 0) / (10 * 25) = 1.6 # Y distance per frame = (10 - 0) / (10 * 25) = 0.04 I suspect you'll want something similar to the fo

Re: [FFmpeg-user] mosaic video 2x2, 3x3 etc

Instead of using nullsrc as your base use color as your base. I suspect the syntax is "color='color=black:size=2560x720' [base]; " As for doing a dynamic number of videos you'll need to write a script a language of your choice (perhaps powershell or C#) to generate the syntax for you. Alternati

Re: [FFmpeg-user] frame by frame scrub h264/mov issues?

My understanding of the -force_key_frames option is that it takes a comma separated list of time intervals (in seconds) to trigger key frames to occur. In my program I use "-force_key_frames:v 0,0.01" to force the first and second frame of any video to be keyframes regardless of the framerate

Re: [FFmpeg-user] Compensating for missing audio frames at beginning of video

I'm not sure if this will be of any help but look into the asetpts, adelay and amix filters. You may also find that the afifo filter may help but be careful as it consumes large amounts of memory. Failing that; perhaps you could generate a stream of silence with aevalsrc='0|0' then merge each s

[FFmpeg-user] JPEG > zoompan > overlay possible?

I'm attempting to apply the Ken Burns effect to a single JPEG image using the zoompan filter then overlay it onto a 1280x720 canvas. I'm running into buffer problems during the encoding process which results in the output video freezing during playback in VLC at 00:00:03.00 Note: You'll need to

Re: [FFmpeg-user] ffmpeg on mac - xyz color conversion with dcp to mov not working

Just found this on Google, not sure if it's applicable. http://ffmpeg-users.933282.n4.nabble.com/xyz-to-rgb-conversion-td4661196.html ffmpeg -i video-source.mxf -vf scale=1920:808,lut3d=XYZ-sRGB.3dl,pad=width=1920:height=1080:x=0:y=136 -codec prores output.mov -Original Message- From: f

Re: [FFmpeg-user] Cross fading of videos

Please note that I haven't tested any of the following suggestions. I do however have dissolve with crossfade working a project of mine and I have based these suggestions off working code. 1) Dissolve (Assuming the resolution of both videos is 1280x720 and the audio format is identical) Notes:

Re: [FFmpeg-user] Cross fading of videos

g this happen, Guido found this post: http://superuser.com/questions/1001039/what-is-an-efficient-way-to-do-a-video-crossfade-with-ffmpeg All I had to do is fix the syntax a little, add the audio, and voila'! Just in case you can use it for your project -- free of charge! :D Thanks for

Re: [FFmpeg-user] Cross fading of videos

lf Of Tony Mobily Sent: Wednesday, 16 December 2015 10:44 To: FFmpeg user questions Subject: Re: [FFmpeg-user] Cross fading of videos Hi, Is that the bug you were getting around when passing the same file name multiple times? Merc. ᐧ On 16 December 2015 at 07:37, Ryan Williams wrote: > Plea

Re: [FFmpeg-user] Overlay a video with a image at multiple offsets and of varying duration?

I suspect you have a syntax error in your filter_complex with use of double quotes. Also your input/output pad mapping is incomplete. give this a try -filter_complex "[0][1]overlay=enable='between(t,1,5)'[tmp]; [tmp][1]overlay=enable='between(t,10,20)'" -Original Message- From: ffmpeg-u