Questions tagged [video]

Video is the technology of electronically manipulating still images that represent motion.

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4 views

Are there any way to Capture video stream using Android camera as scanner?

I know , we can write android code to scan bar-code and QR code using normal android phone camera . I interest to know. can I write to scan video stream using Android camera? (I want to know , extract ...
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10 views

Will faster encoding affect the quality in the end? (h.264)

If I speed up the encoding in blender to real-time for quicker encoding, will the actual quality of the video go down? Or will the file just be bigger? Just trying to make videos for my YouTube
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17 views

Uploaded video from IOS and Android devices can't be merged

When I try to concatenate one video from IOS and Another from Android user, the output video doesn't work. I am using this command: ffmpeg -f concat -safe 0 -i mylist.txt -c copy output
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20 views

Netflix preview video production

Netflix auto-plays a 20s, 30s video preview in the background if a video is selected or we hover the mouse pointer on them. I was trying to play with them, but couldn't understand how this preview "...
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1answer
16 views

Compile FFmpeg example code

I was trying to compile an FFmpeg example code HERE that illustrates how to use filters using it's C APIs. I compiled the code (throuh a universal make). As the usage suggests, I'm doing this: ./...
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1answer
17 views

Sony Vegas Pro 12 - 4/3 video wrongly considered as 16/9

I am digitalizing Super 8 film with a dedicated Somikon scanner. It outputs H264 - MPEG-4 AVC films in 4/3 (1440x1080). When I open these films directly with VLC, there are displayed in 4/3, which is ...
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2answers
32 views

Defined Technical Specs for 'Broadcast Quality'

Does anyone know if there are clear technical specs a digital file can be assessed against to confirm a valid 'broadcast quality' file? EG: Video = certain bitrate Audio = certain bitrate. ...
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1answer
89 views

Export Frames of 10 BPC Video File with ffmpeg

I have several hundred 1080p 59.94fps 10-bit-per-channel (bpc) AVC-Intra Class 100 MXF encoded video files. I would like to extract the frames of this video file and export them to disk in a 16-bit ...
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14 views

How can I change/reduce the bitrate of AVI files using Adobe Premiere Pro CC or other tools?

I'm using Eprime and Experiment Builder which requires files in AVI format (AVI-XVid). The files are quite small already (various 2 second clips under 1mb), but are still too large which crash the ...
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1answer
14 views

Formula / Calculate how much to slow video down to match audio?

scenario: I have video matched with audio (song). I slow the audio (song) down (eg from 120 bpm to 115bpm ie, I know exactly how much slower the new audio is than the original video) How do I ...
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1answer
18 views

Why would an ENG camera need 422 Chroma?

I can't believe it! 3CCD camcorders without the rolling shutter inferiority of the CMOS ones still exist and their sensors are even bigger! But why does that particular camera have 422 chroma? How a ...
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6 views

Software Just for Making Subclips

What’s the best piece of software to use just for making sub-clips from my video files? I usually do this is FCPX, but I’m looking for a way that doesn’t require importing, transcoding, etc.
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Sprite Zoom Effect doesn't affect objects

I'm currently working on a video, where I'm trying to do a zoom and pan effect over a series of videos set in a single frame. However when I convert all the videos and objects into a sprite so that I ...
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19 views

Mjpeg in video containers use case

From time to time i'm converting mkv to mp4 using ffmpeg in order to save disk space. Currently i noticed that in some files multiple mjpeg streams where also included. Some of them were named cover....
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17 views

More video streams in a container

Many formats (containers) have an ability to host more video streams - e. g. MP4. Is there a practical use of this advantage?
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1answer
20 views

Recording a two speaker event with large audience

We are doing regular events with two speakers on the floor who have their own presentations in parallel. The event is a live hacking presentation, one speaker is the moderator and victim, the other ...
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23 views

How to use record video with ffmpeg

can someone tell me how I can record a video + audio and can I specify the fps and the resolution of the output file ? I'm very new to ffmpeg so i don't know much. Thanks.
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24 views

How to put a hole in a wall (VFX)

This is a really basic VFX question. I just downloaded Blackmagic DaVinci Resolve (with fusion) and I was interested in trying out VFX. I thought it would be a cool idea to try to put a hole in the ...
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2answers
34 views

FFMPEG single input file, crop to multiple streams, then overlay back into one output file?

I'm currently using a couple commands to 1- output two files with cropped regions, and 2- overlay the 2 files back into a single file. I would like to be able to merge this all into out command and ...
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1answer
21 views

Closed Captions missing when converting from mp4 to ts

This is a follow-up question from my previous question HERE. I'm trying to convert a caption-embedded .mp4 video into a .ts file, simply changing the container format. But once I convert the video, ...
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2answers
23 views

FFMPEG No such File or Directory Problem

Help I always get this I dont know why]1
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1answer
27 views

How can I make an exact 60FPS GIF?

I'm trying to create a 60FPS GIF. However if I use Photoshop the frame time is not correctly even when choosing 0 delay between each frame. I was trying to make an emote. The project is from After ...
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1answer
25 views

Errors in converting mp4 to ts with FFmpeg

I was trying to convert a caption-embedded .mp4 file into a .ts file. Only command found after some search was this which uses FFmpeg: ffmpeg -i 1559066401592889640.mp4 -c copy -bsf h264_mp4toannexb ...
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1answer
8 views

Walking Forward in Google Tour Creator

To start with, I am an amateur when it comes to computational photography. I am trying to use Google's Tour Creator to create a virtual tour of my store. It works perfectly when I am standing at a ...
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1answer
15 views

what could prevents MPC-HC from opening and playing mov file?

... and the strangest thing is that the very same file plays back just fine on a different (but very much identical) Win 10 system. The file is a .mov prores video file. Both system have prores ...
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1answer
5 views

Trying to improve choppy ipad screen capture

I'm trying to improve the choppy screen capture that I'm getting on my ipad. The screen capture plays smoothly when viewed on the ipad itself, however it is choppy when played on my pc in vlc, and ...
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22 views

Add image to video with transition effects with ffmpeg

I can add an image to the end of a video with ffmpeg using following command. But how can I specify a transition effect? Like a sliding effect? ffmpeg -i merged2.mp4 -loop 1 -t 3 -i logo.jpg -f lavfi ...
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11 views

Generating text animation in After Effect according to length of the text

I am a beginner in After Effects, so please excuse me if the answer seems quite obvious. Here's what I am doing: I am adding animated subtitles to a video. I am using an animation that makes the ...
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2answers
59 views

Merge two videos in ffmpeg with audio from one

How can I merge two videos v1 and v2, but the audio coming from v2? Say v1 is 1 second, and v2 is 2 second. Basically I want to merge v1 and half of v2, but the whole audio be from v2. Please make it ...
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28 views

Video clip making features with FFmpeg

I'm trying to use ffmpeg to create a video clip out of multiple videos, photos, and background music. Basically all the features that tools like Windows Movie Maker support. I would like to do things ...
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1answer
36 views

What kind of lighting setup is this?

I'm looking to understand how this person did their lighting setups, what kind of filters they used, and angle of view (35mm equivalent focal length). From what I can see, there is a ring light and ...
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1answer
30 views

Adding audio to picture: video too long even when using -shortest

I am trying to combine an audio (.wav) file and picture file (.png) into a video file. The video's length should be the same length as the input audio. Also, the output video should be youtube-...
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1answer
36 views

GIF video thumbnail with FFmpeg

I'm trying to generate a GIF thumbnail out of a video, similar to what youtube thumbnail works when we hover the mouse on a thumbnail as a video preview. Is there any ways to do it with FFmpeg? Say I ...
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1answer
31 views

Outputting 1x3 Video Wall at 5760x1080

I'm looking for the simplest way to create a 1x3 landscape video wall. Where the animation plays at 5760×1080 across the three screens. The orientation is like this: I've seen PiWall and that might ...
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1answer
70 views

Long video clip stabilization with ffmpeg and vidstab

I'm learning how to use ffmpeg to stabilize some footage I shot at a conference (my setup had a nasty wobble and I didn't realise how bad it was until I started editing). After trial and error I ...
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1answer
21 views

Fix half blind video

I've recorded a mp4 video with h265 encoding using my Android Pixel 3. After investigating the video, half of the video is blind. All other recordings are perfect. Is there any way to repair this ...
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1answer
42 views

How do I crop out Region of Interest (ROI) from .mp4 video using FFMPEG?

I would like to crop out ROI from specific .mp4 file. User needs to define the ROI by specifying X,Y,Width and Height in percentage between 0 and 10000. For example, if someone specifies X=4000, and ...
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2answers
25 views

How to shoot my whole life from first POV?

I would like to shoot whole my life (24h, 365d etc) on video, like as through my eyes. However I came to dead end trying to match recording times of modern action cameras, the battery change hustle, ...
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1answer
49 views

How to use magicyuv & utvideo codec with ffmpeg

I would like to know how to use magicyuv & utvideo codec with ffmpeg
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1answer
28 views

Objective video quality assessment

I'm trying to develop a tool that given a video (without a reference video), it can measure the quality. Basically given some thresholds, it assigns them a rating (I just need 4 classes 1-4). Since we ...
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25 views

ffmpeg - Live hardware capture dropping frames and/or audio pops

I'm attempting to capture 1920x1080 at 60 FPS using a Magewell HDMI capture. If I preview it with ffplay it looks just fine, however when using ffmpeg to record I get frame drops and minor audio ...
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1answer
80 views

ffmpeg - blend video with images

So I want to create videos that had a red overlay, effect and I assume that blend is the right options filter for this. Here my command : ffmpeg -i dogs.mp4 -i red.jpg -filter_complex '[1:v]scale=...
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26 views

How to generate TSMuxer .meta file with command line?

With the GUI if you open any file it generates the .meta file and you can save it as a file and pass on for the batch scripts, etc. It looks something like this MUXOPT --no-pcr-on-video-pid --new-...
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1answer
26 views

FFMPEG - Creating script to convert a video into audio file (or anything related really) + diverses questions

Good day everyone. Im making my babysteps into ffmpeg, and so far this tool has been really helpfull. Anyway. Im currently using this line as a convertion basis : ffmpeg -i name.mov -c:v libx264 ...
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1answer
54 views

Call FFmpeg filter from source code (C API)

I'm trying to find out how to call a FFmpeg filter (freezedetect) from within FFmpeg's source code. I see the filter's file is under libavfilter/vf_freezedetect.c, but I don't know how to use that ...
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41 views

FFmpeg loop filter doesn't work

This is a follow-up from my previous question here. Basically, I'm trying to use FFmpeg's loop filter to freeze some frames and insert black frames. It's very weird; I swear it was working a few days ...
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1answer
37 views

Combining two video fields into one (to create an interlaced video)

I have two separate video fields (top.avi and bottom.avi) and I would like to merge them to create an interlaced video. Is it possible to do this with ffmpeg? (or any other tool for Windows or Linux) ...
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1answer
90 views

FFmpeg No such filter error

I'm trying to use FFmpeg to create a new video with some frames repeated and black frames inserted inside. Here is my command: #! /bin/sh fn="Drifting with Cars.mp4" # ffmpeg -y -i "${fn}" -ss 00:00:...
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DJI MAVIC PRO Wavy lines issue

I'm having a new issue with my Mavic recording wavy lines. It seems that it affects only vertical high contrast areas. I have included a very short clip that shows the problem. Any help would be ...
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1answer
40 views

How to lower number of parameters passed to ffmpeg

I am processing video with FFmpeg. I am trying to add image overlays at certain times. I have command something like this: ffmpeg -i video.mp4 -i img_a.png -i img_xx.png -i some_third_image.png -i ...