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9

so now I'm wondering if my tapes are marked as PAL SECAM, do I need a PAL VCR? Yes, VCRs partially deconstruct the signal to encode it on the tape, and so are specific to a particular analogue video format. In practical terms, if you try to play a PAL tape in an NTSC VCR connected to a PAL TV, you'll probably get a distorted black-and-white image, or ...


7

This is an addition to the excellent answer by PTS and an answer for chovy. If you want to place the overlay at the lower right corner, FFMPEG can calculate that for you very easily. Use the modified command: ffmpeg -i input.mp4 -i image.png \ -filter_complex "[0:v][1:v] overlay=W-w:H-h:enable='between(t,0,20)'" \ -pix_fmt yuv420p -c:a copy \ ...


4

I don't know if there's a "standard", my personal opinion - "it depends". In general you'll get away with a frame or two out of sync, although most editors will just line it up as accurately as possible if they can, unless there's a reason you can't? I've filmed tap dancers on a stage and given the teacher the raw footage - and had them complain the audio ...


4

You are most likely observing Optical Aberration - see https://en.wikipedia.org/wiki/Optical_aberration and also https://en.wikipedia.org/wiki/Defocus_aberration. Haze is also likely a contributing factor, see https://photo.stackexchange.com/questions/93585/are-there-tools-used-to-remove-heat-haze-or-other-atmospheric-conditions-for-lon. The further back you ...


3

I would try using a displacement map. You can use a solid with turbulent noise on it and use it as your map, then animate the evolution, contrast and brightness so it displaces the film accordingly. If your burn is a separate layer, you can also use this as the matte for the solid with turbulent-noise in it with the effect "set matte". Also, you might want ...


3

The likely culprit is the Audio setting [Output Track 1], which should normally be "Main 1 (Stereo)", which is the default final bus/mix of the audio in the compiled video. When setting it to "All timeline tracks" -- each audio track (stereo or mono) is rendered as separate tracks (stereo or mono) in the output file.


3

I'm not able to state a conclusive definition for "visual grammar", but I'd say camera settings have a quite relevant role on building it. Depth of field (aperture) is crucial for focusing on a subject; ISO may be used for obtaining a noisy image which can be used to say something (to look like an amateur, or a security camera, for instance); WB ...


3

If I understand you correctly, then most of the restoration goals will be impossible to be reached. While my knowledge of existing videos tools is not extensive, I am still pretty sure such a software does not exist. As a software developer I have a good grasp of what is impossible and what is possible and what effort you need to do that. When details are ...


3

This is called interlacing. It's a video artefact left over from the days when video signals for television (and domestic systems) sent every other horizontal line, then filled in the missing gaps, every half a frame of video that was sent. You need to deinterlace the footage before you edit it. If someone else has already uploaded the footage incorrectly to ...


2

I created a cross-platform Node.js based CLI tool for making simple video edits. It is more opinionated and limited than mlt, but it aims to have lots of easy to use components and transitions, and sane default values. editly \ title:'My video' \ clip1.mov \ clip2.mov \ title:'My slideshow' \ img1.jpg \ img2.jpg \ title:'THE END' \ --audio-...


2

Theoretically it IS possible, and there are working, practical, proof-of-concept research on the subject. A couple of examples: Learning to Extract Flawless Slow Motion from Blurry Videos Blurry Video Frame Interpolation The picture below is from the second paper. However, as of this writing, I couldn't find any feasible-to-use, (commercial or otherwise) ...


2

Using FFmpeg's command-line, this is totally possible. I do it to increase the speed of my videos by 10% (increasing both the audio AND video by 10%, without sounding like a chipmunk). The command to increase your video's speed by 10% is: <ffmpeg path> -i <origin video path> -vf "setpts=(PTS-STARTPTS)/1.1" -crf 18 -af atempo=1.1 <output ...


2

You can import the folder as an image sequence. To do so, click on the small arrow next to import and choose import as image sequence. Then choose the folder that contains your frames and click ok. You might have to adjust the framerate to match your project in the media settings.


2

Assuming you want a layout of: 0 1 2 0 3 4 Command is: ffmpeg -i input0.mp4 -i input1.mp4 -i input2.mp4 -i input3.mp4 -i input4.mp4 -filter_complex "[0]scale=-1:720[v0];[1]scale=-1:360[v1];[2]scale=-1:360[v2];[3]scale=-1:360[v3];[4]scale=-1:360[v4];[v0][v1][v2][v3][v4]xstack=inputs=5:layout=0_0|w0_0|w0+w1_0|w0_h1|w0+w1_h1[v]" -map "[v]" output.mp4


2

Yeah that was actually the best opening ceremony ever... Doing something like this yourself is a hefty task, but first, here's what you would need: A software for tracking A software for modeling / animating (optionally something for compositing / color grading) Luckily, Blender (which is free) can do all those things, but has quite a steep learning-curve. ...


2

Probably fade and cut. But, I must say every transition effect have a a point in terms of story telling. 'Cut' transition tells us the next scene might be in another place and time and so on.


2

Chameleons do have some pretty wild colors they can change into, and the process is extremely advanced, requiring physicists and biologists to fully understand how it works; check out this video for how it works. Personal note: Something this advanced doesn't happen by random chance. Anyway, my personal opinions aside, it appears to me, this video was ...


2

Assuming that your video file does not have an alpha channel (an extra channel of information in the video file that defines which bits of the video should be transparent): Place the text .mov on a layer in your sequence Select the clip Go to the Effect Controls for that clip Under the "opacity" heading, set the Blend Mode to Screen. Anything ...


2

I see no need to worry about those meta data or why you should remove them. Pantry and Ingredients tags refer to asset tracking. In fact most of this data are production related and not relevant in any way for a consumer. The rest tells you about technical features, like the resolution or video codec. A watermark is something different. If you want to ...


2

Can there be a reliable answer? No. As with almost everything is video. The real answer is: It depends. With mp4, the moov must be at the beginning, AND the mdat must properly interleave tracks. For example, If the there more than one megabyte of audio before the video, Then it won't work even with the moov at the start. For TS, there must be a SPS, a PPS ...


2

What do you consider "normal" filming? I've filmed a lot in theatres with audiences, usually in performances that are primarily for the audience, and the video recording is a secondary consideration. Usually the camera in this scenario is back far from the stage (behind the audience, so you're not in anyone's way), and the camera positions are ...


1

Yes. For things like exposure time, EV, f-stops, video is just the same as still photographs. You just happen to be taking 24 or more of them per second. The one difference in actually exposing a frame would be that still photography typically uses a mechanical shutter. (You can hear it k'thwap when you take a picture on many cameras.) But video uses an ...


1

Instead of always using [1:v], you would use the output of the previous one e.g. [ckout1] My guess, you want this: ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex '[1:v]colorkey=0x6AA999:0.1:0.2[ckout1];[ckout1]colorkey=0x4D827A:0.1:0.2[ckout2];[0:v][ckout2]overlay[out2]' -map '[out2]' output.mp4 (Maybe the inputs switched around) The overlay you are ...


1

The question is impossible to answer in a general way. If a camera offers to record in RGB, it is likely using a completely different codec that could be better or worse. Very few cameras will actually record video in RGB, so if you see the option in a menu, it may be referring to something very particular about the color handling of video on that specific ...


1

Without an example it's hard to say, but I think perhaps sometimes people just hold up their camera and film, they can't or don't frame the shot or adjust the zoom, they're often standing in one place and can't get closer to line up a good shot. Also lighting is super important for good video, unless it's filmed during the daytime in sunlight, the quality ...


1

Use the overlay filter to put the showwaves on top of image.jpg: ffmpeg -i song.mp3 -i image.jpg -filter_complex "[0:a]showwaves=s=3840x200:mode=line:colors=red|yellow[sw];[1][sw]overlay=(W-w)/2:(H-h)/2:format=auto,format=yuv420p[v]" -map "[v]" -map 0:a -movflags +faststart video.mp4 Adjust showwaves colors with the colors option. Each channel will have ...


1

Combined command: ffmpeg -i input0.mov -i input1.mov -filter_complex "[0]scale=640x360[v0];[1]scale=640x360[v1];[v0][v1]hstack,split[video][image]" -map "[video]" output.mp4 -map 0:a audio0.mp3 -map 1:a audio1.mp3 -map "[image]" -frames:v 1 image.jpg For a 4 videos into a 2x2 layout: ffmpeg -i input0.mov -i input1.mov -i input2.mov -i input3.mov -...


1

The overall steps are: I. On a photo editor (Ps, Gimp, Photowhatever) Duplicate the image several times, One per element of your final composition, for example. Background, player, monster 1, monster 2, ax. Mask each element, normally with the lasso tool or similar, so you isolate the element on that layer. For the background, you need to expand it a bit ...


1

I got it working by adding -fflags nobuffer -flags low_delay -strict experimental before all the inputs. Got helped reading this thread


1

For mkv files, you can use mkvpropedit —add-track-statistics-tags to add stream level data.


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