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Video Production : Recent Questions and Answers (Page 5)

Find answers to your questions about Video Production or help others by answering their Video Production questions.

How to filter out overlapping audio? Given a mixed track and one stem track, what's the best way to "subtract" the stem from the mix?

Given two audio streams, I'd like to remove the audio in one stream that also exists in another. In this particular case the 1st stream contains everything mixed, and...

Asked on 10/28/2021

1 answer

Lighting a chalkboard

COVID has forced online delivery of my courses for which some of my content lectures/office hours I now will do on a chalkboard with a video stream. But I...

Asked on 10/28/2021 by Algeboy

3 answer

Scale video without keeping aspect ratio in ffmpeg

I want to make a video 'wide', so the width is increased and the height stays the same as of the input image. I use the following command: ffmpeg -i...

Asked on 10/28/2021 by Bakhanov A.

1 answer

ffmpeg amix filter command execution never stops

Hello I want to achieve something like in this pic below using ffmpeg: Initially I used below command:ffmpeg -i...

Asked on 10/28/2021 by Khawar Raza

1 answer

Can ffmpeg calculate a new starting keyframe when being asked to split/copy on a non-keyframe?

I understand from a question here that keyframes can (and do) occur anywhere in an h.264 stream, so I'm wondering why most of the advice I see where users...

Asked on 10/28/2021 by Caius Jard

1 answer

Mux mkv and dts file, change default audio stream and language

I want to mux (combine) two files into one mkv file. The first one is an mkv file that contains a video and an audio stream in German. The second...

Asked on 10/28/2021

2 answer

Why Camtasia always produce video with a low quality, even if I record in 1280p, for example?

I spent some time learning this tool, but I'm disappointed because I cannot produce video enough quality. Look for that, firt I have a screen snippet of the video still...

Asked on 10/28/2021

1 answer

After Effects: Make beam effect go over end/beginning

The beam effect is a plugin in AE in which I can basically decide a "beginning" or "ending"-coordinate and AE will draw a line between these two coordinates, the line...

Asked on 10/28/2021 by diatomym

1 answer

Rotating image/video about an axis within xy-plane in FCP

Is it possible to animate a photo/video so that it continuously rotates about an axis within the xy-plane? For example, rotate it about the y-axis. I know how to regularly...

Asked on 10/28/2021 by Rickmer

2 answer

Configure CQP (CRF) for h264_nvenc

Encoding on CPU can be done via:ffmpeg -i input.mp4 -vcodec h264 -crf 23 -acodec copy h264.mp4GPU's alternative for the codec is h264_nvenc. How can I pass the same options...

Asked on 10/28/2021

3 answer

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