FFMpeg has an option to modify the aspect ratio of a video file without actually modifying the video, see http://www.ffmpeg.org/ffmpeg-all.html#Video-Options
For example, in your case, the desired aspect ratio is 720 / 480 = 1.5 (3:2) (which is NOT 4:3, it should be 540 in that case)
So your command line may look like:
ffmpeg -i input_file.avi -c copy -...
Create a sequence that is 720x720, drag the clip on to the timeline, and in the canvas window use the arrow tool v to double click the layer which brings up the layer controls. Position it the way you want, export. I'm pretty sure Premiere doesn't scale non-uniformly by default.
If it does for some reason, you'll probably want to use the conform options ...
525/60 digitized SD video according to Rec. 601 is indeed 720 pixels wide, 480 pixels high, including some blanking on the sides. Digital equivalent of 625/50 is 720x576. In both cases, frame aspect ratio is 4:3, this simply means that the pixels are not square. See https://en.wikipedia.org/wiki/D-1_(Sony)
To make matters more complex, only a subset of the ...
This answer assumes that the video that you're editing is already in a 16:9 ratio, otherwise when you export there will be black bars on the sides or above and below your video.
A 16:9 ratio is the standard for HDTV and Full HD. You're probably familiar with the Youtube video qualities - 360p, 480p, 720p, 1080p, etc. These are all 16:9. Therefore, all you ...
First off, 2K is not 1440p, it is 2048 x 1080p. 4K is 4096 x 2160p. (Note that UHD = 3840 x 2160p...4K and UHD are like US and Canadian dollars--they are both dollars, but they have different values.)
It's simple math: when you have a straight line and you make it twice as long, the new length is 2x the original length. When you have a rectangular area ...
When you take a photo with a Modern camera "usually" it's 4/3, I know you can change the aspect ratio, but that's not my point. I assume, that the sensors of DSLR cameras are the same ratio, because they are created for the purpose of creating photos, aren't they?
Actually, no. Only low-end digital cameras (mostly point-and-shoot) use a 4/3 aspect ratio, ...
There are 2 different things:
The real width and height of frames (in pixels) - see the green part of the folowing picture.
The displayed width and height (during the playback) - see the blue part of the same picture.
The problem arose in old bad days, when the resolution of devices (number of pixels in the image) was very low, but the required ratio of ...
AVIdemux can do that when encoding, but i cannot remember if it allows you to do that when you chose to copy the stream without reencoding (you don't want to reencode, since it will not only be time consuming, but also lossy).
If you are willing to change it from AVI to MKV (VLC and most other players will have no problem playing it) you can do that with ...
how can I concatenate different videos while maintaining the original quality and aspect ratio?
using concat demuxer
Make text file containing:
ffmpeg -f concat -i input.txt -c copy output.mp4
This is fast and does not re-encode, so it will maintain the original quality, but it may not be supported or play ...
The player panic you are experiencing might be due to the checksum in the ogg header. If you recalculate the checksum for the whole header with your new value you might get a valid file again.
Though I dont know all too much about the ogg and vorbis specs. For this kind of low level work its always a good idea ...
I have to thank @ProfessorSparkles for getting me to this solution, which doesn't require saving and reimporting, or making a duplicate of the source footage. Here are the steps:
1) I started with the 2 clips I'm using in the same bin.
2) Drag the landscape-oriented clip to the timeline. That creates a sequence with landscape orientation in the bin.
You need to make sure your artwork is at least 720x1280 in size.
Then open a video editing package like Adobe Premiere, Final Cut, or an animation package like After Effects.
Create a project with a canvas of 720 x 1280 pixels, and drag your artwork into it.
Make the timeline 10 seconds in duration (set in and out points on your timeline).
Export your ...
You will need to work within the title safe areas when burning to DVD as depending on what the final player will be, there might be overscan which will/can crop anything out that is not within this field. as for the pixel things, I'm not to sure.
ffmpeg -i input.mp4 -vf "scale=1920:1080:flags=lanczos,setsar=1" output.mp4
This will stretch the video to 1920x1080.
ffmpeg -i input.mp4 -vf "scale=-1:1080:flags=lanczos,setsar=1,pad=1920:1080:(ow-iw)/2:(oh-ih)/2" output.mp4
This will keep the aspect ratio but place black bars on the left and right.
The flag in the scale filter determines ...
Unfortunately, the screen is showing the whole frame. That is all that your camera recorded. It did not record anything to the left or right of what you see.
On YouTube, where many people shoot their videos in a vertical format as you did, it is common to enlarge the video to the full frame width - which will cut off the top and bottom of the video - and ...
A small bit on terminology :- SD and HD refers to resolution - in the basic sense of the word, not dimensions. A given video can be wide or tall or square while being SD or HD. It's the legacy of television broadcast standards that SD content is 4:3 and HD 16:9 but display aspect ratio and visual definition aren't connected. That nitpick aside..
For 4:3 to ...
You need to use a canvas which can accommodate all inputs. To adapt this canvas during runtime, we can use the scale2ref filter.
ffmpeg -i video1 -i video2 -f lavfi -i color -filter_complex "scale2ref[canvas][vid1];[canvas]scale2ref='max(iw,main_w)':'max(ih,main_h)'[canvas][vid2];[canvas]split=2[canvas1][canvas2];[canvas1][vid1]overlay=x='(W-w)/2':...
I did not manage to solve the source problem, but I found how to overcome the consequences.
It is indeed possible to edit the aspect ratio of the rendered video using ffmpeg:
ffmpeg -i <INPUT_FILE> -aspect 4:3 -c copy <OUTPUT_FILE>
If you want the output resolution to be 1280x720 and the video keeps its original ratio aspect as well:
ffmpeg -v error -stats -i input -vf
Apply a screen protector to the LCD and use a permanent marker to draw the aspect ratio you want to frame for. Relatively inexpensive, easy to add, and completely safe for your screen. You may want to just draw a fairly thin line to mark the safe area; it can sometimes be useful to see the full frame.
It means that the ratio between the width and the height of the content (in pixels) should be the specified one.
Specifically, for a video you need to have an aspect ratio (technically, a DAR - display aspect ratio) of exactly 1:1, so the width of the video should be the same as the height of the video. In other words, the video should be square. As an ...
Having seen the sample, this is the command
ffmpeg -i in.avi -vf pad=720:576:0:144,setdar=4/3 -target pal-dvd out.mpg
The video is square-pixel, so scaling is not required. The frame should be treated as 4:3, not 16:9 (which isn't the right ratio for this movie anyway).
For widescreen playback in the PAL standard, your rendered raster has to be 1024x576. ...
It's a great app for the iPhone.
Not only does it have some great camera features; like stabilization, and manual exposure/WB, but you can also use it's post feature on any clip in your Photos folder.
You can crop, change aspect ratio, framerate, adjust rotation, pretty much anything... along with a ton of filters; color correcting tools and so ...
You can use a combo of the scale and setsar filters.
ffmpeg -i hdv-input.m2t -vf "scale=iw*sar:ih,setsar=1" -crf 28 -c:a aac -b:a 80k -ac 1 -movflags +faststart h-264-out.mp4
The scaler width to set to current width x sample/pixel aspect. If it's already 1, it amounts to new width = old width. I've added a setsar afterwards to ensure the output SAR is 1.
In project properties, set your pixel aspect ratio to 1.333 as well. Furthermore, make sure that when you right-click a video on your timeline that both resample is disabled, and try fiddling around with the "maintain aspect ratio" option. I have a hunch that it has got to do with these settings.
Try using different formats/encoders as well to see what ...
One way to deal with different aspect ratios is to take footage that is not as wide as your output format and duplicate it in another layer. Increase the scale on this other layer and blur the image, then put the original over it. This produces a nice coherent effect where the area outside the original footage is filled with colors that are from the original ...
Okay, after some reasoning and research I think I understand what happens.
Basically, the sensor is fixed in size, but the lens is too. Which means the only way to get a wider sample to fit the image to 16:9 is to crop down the image on the sensor to about 720x405 pixels, each pixel catching a sample of ratio 64:45 (SAR).
The image is then stretched ...
You can use FFmpeg, a free command line tool to do this:
ffmpeg -i input.mkv -vf pad=1920:1080:0:140,subtitles=filename.srt -crf 20 -c:a copy out.mkv
The subtitles filter accepts ASS styling parameters, such as font size and margins.