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4 votes

How to use FFmpeg Command for Reverse Video?

@Gyan is correct. You can reverse a video using ffmegs built in reverse video filter: ffmpeg -i video.mp4 -vf reverse video_reversed.mp4 However this is incredibly memory intensive. I wont go into ...
3 votes
Accepted

Reverting Loss from .MOV (MPEG-4 Compression)

No, there is no way to recover information lost during any encoding steps - they are discarded forever. The only way to avoid this is to use lossless encoding. That said, there are various algorithms ...
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2 votes

How to trim out black frames with ffmpeg on windows?

I've put together a Python script that will do all of this. Generates the ffprobe and ffmpeg commands and runs them And outputs a file without black clips GitHub repo: https://github.com/FarisHijazi/...
2 votes
Accepted

After Effects: How to do Organic Contraction effect

There's a 3D deformation happening here, along with an optical glow on the bass beats. I would guess this was made in After Effects, using the plugins Trapcode Form or possibly Plexus with Sound Keys ...
  • 6,773
2 votes
Accepted

What is the effect used in movie gulliver's travels title cards

It's known as a tilt-shift, or miniature effect. Essentially the focus is only sharp in the middle distance, both near & far are blurred. This mimics a shot of a toy town model shot from much ...
  • 332
2 votes

How to change Background color in a Video? SOFTWARES: Filmora or Adobe Premier pro

Without the original assets, anything you do will be less than ideal. In Premiere: Because the background is black, you could change the Blend Mode in the Opacity settings to Screen.
  • 6,773
2 votes

Estimating video file size given camera parameters

I don't think this is possible without more information. Even if you only want a very rough estimated filesize, you are still missing information that will affect the final size. Couple of things you ...
  • 358
1 vote

How can people apparently manage to capture video in such poor quality in 2022?

The short answer is compression. While cameras these days are modern marvels, the images they capture are often encoded, re-encoded, and re-encoded again as they make the trip from the camera sensor ...
1 vote

How to make lights flash like in stranger things

This is the kind of thing they use these days - It looks like a 'neon' or fluorescent tube, but it's actually LED driven. They can be remotely controlled or programmed into virtually any pattern, any ...
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1 vote

Cryptic FFmpeg + Python error: "Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_crop_1"

Both -vf and -filter_complex can't be specified for the same input stream. In any case, you would have to carry out the pad at the end of the stacking, so remove the -vf and use the following. '-...
  • 31k
1 vote
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Meaning of ffmpeg output (tbc, tbn, tbr)

Well it's all about time. FFMpeg uses in fact three different timestamps in different bases in order to work. tbn = the time base in AVStream that has come from the container tbc = the time base in ...
1 vote
Accepted

ffmpeg merge video with 2 audio files

I think I managed to do the audio part at least (after that I combine the audio track with the video): ffmpeg -f lavfi -t 5 -i anullsrc=channel_layout=stereo:sample_rate=192000 -i file1.mp3 -...
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1 vote
Accepted

What is this effect (Motion Trails) called and how can i create it?

It’s a motion trail. You can use After Effects to create one using the Echo effect. Here’s a tutorial that explains how to do it:
  • 6,773
1 vote
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Software for speeding up a video

Have you tried to use FFmpeg already? It's a very versatile command line tool. Here is a dedicated page with a lot of examples on how to speed up/slow down a video with it.
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1 vote
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Hardsubbing ASS onto MPEG4

ffmpeg has an amazing article on burning the subs into the videos. I trust ffmpeg to be very careful with (the lack of) quality loss. Given you are dealing with ASS, here are the important bits, You ...
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