stib
  • Member for 9 years, 11 months
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How do I change frame size, preserving width (using ffmpeg)?
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48 votes

using the scale filter will do it, but there is a bit more to it. ffmpeg -i input.mov -vf scale=720x406 output.mov will create a movie with the required pixel dimensions, but if you look at the ...

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How to downsample 4k to 1080p using ffmpeg while maintaining the quality?
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33 votes

The default settings for ffmpeg are very low quality, and since you don't specify any codec or quality parameters it's just using the defaults (I don't know why the devs don't fix that because it ...

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How to encode Apple ProRes on Windows or Linux?
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31 votes

As of December 2018, Adobe Creative Cloud aps, such as Premier, After Effects and Adobe Media Encoder give you the ability to encode in ProRes without any post-hoc conversion. If you don't use Adobe ...

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Adobe Premiere - Restore Audio to A/V Clip After Deleting
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23 votes

There's a semi-automatic way to do this – semi automatic because it involves only typing three keystrokes over and over: xf,, xf,, xf,… — you could train your cat to do it! Here's how it goes: make ...

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MP4 / h.264 patent issues?
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21 votes

IANAL, but as far as I understand it, if you're charging viewers for h.264 / MPEG-4 AVC content you may need to pay license fees. Even though x264 / ffmpeg are Free with a big F, they are just ...

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Why does the color red always appear pixelated on TV and videos on the PC?
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21 votes

It's not an illusion - it's called chroma subsampling. Most video codecs do not represent colour in full resolution. This allows for more efficient "lossy" compression because it takes advantage of ...

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How is "definition" (SD, HD, UHD) actually defined?
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13 votes

The problem is that definitions such as HD, UHD and 4k etc. are partly hype. Marketers for AV equipment like to be rather elastic with the truth, hence the rather rubbery definitions. They're not ...

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Lighting for video in room with no windows, choose led or cfl
9 votes

It's not just about lumens. Generally you get what you pay for when you're buying lights, and the difference between an expensive LED and a cheap one is not usually the power output, it's the colour ...

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Is there a video type for vector animation?
8 votes

The University of Bath released a paper demonstrating a vector-based video codec a couple of years ago, with a press release asking "is the pixel about to die?". Strangely since then the pixel hasn't ...

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How to Set the defaults for Render Queue in After Effects
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8 votes

I'm pretty sure it hasn't changed since CS3 (in fact It's been the same for as long as I can remember): in Edit > Templates > Render Settings >. Another way of getting to this dialogue is ...

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How do I set up and use ffmpeg in Windows?
7 votes

The other answer gives a very good answer that covers the default way of installing it, I'd like to propose another method that is good for noobs and pros alike: Chocolatey is a package manager, it's ...

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How do high-speed film cameras work?
7 votes

A normal film camera has a mechanism for stopping the film in the gate every frame while the shutter is open, then when the shutter closes pulling down the next frame, stopping it, exposing it, and so ...

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What are the benefits of a CLI encoder (e.g. FFmpeg) over GUI Software?
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6 votes

You have 10,000 videos that need to have a logo overlayed, subtitles burned in from srt files, and a standard copyright notice attached to the end. Then you need to make three different versions of ...

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How to force Adobe Media Encoder to use 100% CPU and memory?
6 votes

I'm not happy when I'm rendering unless I can actually smell burning plastic, nothing is more frustrating than AE telling you that your render won't complete until the heat death of the universe, ...

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After Effects distance between two points
6 votes

Hate to spoil all your good work, but it's a lot easier to use the built-in length() function: length(pointa, pointb) e.g. length(thisComp.layer(1).position, thisComp.layer(2).position) or ...

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Can I use h.264 codec inside .mp4 container for my website
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6 votes

You are correct: h.264 is non-free and content producers as well as developers are obliged to pay royalties to MPEGLA for its use - but only if they are charging for their content, and the volume goes ...

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Please tell me which tool I have to use to create a video?
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6 votes

After Effects could certainly do what you want, as could Apple Motion (only for Macs though). If you're on a budget you might want to look at something lower cost - or free: Natron is an open source ...

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Why do pro cameras still need to pull focus?
5 votes

@Martin A provided an very in-depth answer, but I feel that it's worth noting one more thing: focus is part of the creative toolbox that filmakers use. Pulling focus from one actor to another in a 2 ...

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How to save each segment as a separate file with DaVinci Resolve?
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5 votes

Go to the deliver tab and on the left click on the file menu. Above it yopu should see the checkboxes labelled Render [ ] single clip [✓] Individual clips. check the individual clips box, and then ...

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How to change output filename in ffmpeg batch?
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5 votes

You can extract the file name directly from the for replacement parameter. No need to set a new variable at all. for %f in (*.mp4) do ffmpeg -i "%f" -vn -ar 44100 -ac 1 -b:a 32k -f mp3 "%~nf.mp3" If ...

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Separate all layers every "X" interval of time in After Effects
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5 votes

No scripting or expressions are needed, it's built-in to After Effects: Drop all your frames into a comp… go to the 5 second mark… with all layers selected, hit alt] or option] to trim the end of ...

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Duplicate layers X times and move 1 frame each time
5 votes

Here's another trick worth knowing that will do the job without any third party software. To quickly duplicate your layers: first set the label colour to something you haven't used in your comp. ...

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AE - Imported mp4 seems to be missing audio
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5 votes

If you just play the comp it won't play audio. You need to do a RAM preview. Hit 0 (zero) on the numeric keypad or Ctrl+0 if you're on a laptop. . (period) on the numeric keypad (or for laptop ctrl+....

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Are there any free ways to increase the framerate of a video?
5 votes

what about creating image sequences and then using somehting like ImageMagick to interpolate between the frames. So (assuming bash, zsh or similar shell) this should work: mkdir tempdir mkdir ...

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Correct lens distortion with ffmpeg
5 votes

In the manual it says: To use opencv use the calibration sample (under samples/cpp) from the opencv sources and extract the k1 and k2 coefficients from the resulting matrix. If you go to the ...

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Correct font properties for subtitles
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5 votes

For some reason the default subtitle colour often seems to be yellow; I can't find any definitive reason why though. I hate yellow subtitles with a passion, they always look hideous and distracting, ...

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Footprint or breadcrumb animation
5 votes

here's a solution that I've used. It can be used to reveal a shape path, or as a way to add a smooth fade-out on the stroke effect as-is: Create your dotted path using the pen tool (or whatever you ...

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Workflow for Adobe Premiere?
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5 votes

It depends on the type of production. If it's say, a documentary where you have hours of unscripted footage; a drama where the shots are organised by scene, shot and take and you are working to a ...

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Make a video look like it was taken from further away
5 votes

When you shoot from further away you use a "longer" lens, in other words a lens with a longer focal length. This has a few effects, that you'll have to fake to make it look real. First, the ...

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How did cameramen manually focus in the film days?
5 votes

Good quality film cameras have a reflex viewfinder system, where "reflex" means that you're viewing through the lens, and thus you can judge focus by eye. To achieve this There are, er were, two ...

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