Questions tagged [video]

Questions about video editing, streaming, conversion, capturing or video output. Use a more specific tag if possible.

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1answer
17 views

Offset Video Time with ffmpeg and Wrap Around to Preserve Seamless Loop

Suppose I have a seamless looping 4-second 24 fps video (starting at frame 0 and ending at frame 95). Suppose I want to offset it in time so that it starts at frame 20, reaches frame 95 at frame 75, ...
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12 views

Serve video that is encrypted on the server and decrypted in browser [closed]

I would like to create an application where a video is encrypted before hand and placed on a server, the user can then stream this encrypted video and play it back (without downloading the entire ...
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1answer
36 views

FFMPEG Very Slow Yet Low CPU Utilisation

I am using FFMPEG to merge some videos into a single video. For some reason, it is running extremely slowly, barely using any computing power (see picture below). I am not recompiling the video. (See ...
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1answer
40 views

Permission Denied in Batch File for FFMPEG — Windows

I am trying to use FFMPEG to resize a video. I want to do this with ease repeatedly, so I tried to create a batch file (I'm using Windows command line), similar to previous ones which I've ...
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18 views

rca av to 3.5mm jack, audio-video source to pc [closed]

The problem: I have now ran into this problem a few times now. I have a device, like a dvd player, that has 3 channel rca av outputs. I also have a cable, that connect to this, and has a 4 pin, 3.5 mm ...
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24 views

Why does ffmpeg record the wrong FPS when recording an rtsp feed?

I am using a Raspberry Pi 3B+ to record video from a ActiA31 security camera (connected vie a power-over-ethernet router). The camera is set to record at 29.97 fps. The command I am using is sudo /...
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0answers
18 views

Custom Youtube embed [closed]

I noticed that Youtube Studio displays videos differently from the regular embedded videos (no youtube logo, no title, no share button etc.) Click to see picture Does anyone know if it's possible to ...
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1answer
28 views

FFMPEG mix mp4 and wav but add a delay to the start of the mp4

I am mixing an MP4 file with a WAV file. The MP4 contains both audio and video. Basically the mp4 is a video of someone singing to a beat. The WAV file contains the beat. In the resultant file the ...
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8 views

GStreamer pipeline output is a green solarized image stream?

I have a LI USB3 OG02B10 camera module I'm working with, currently we have no drivers for it but I was hoping to be able to at least stream the default images from it so I could do some lens ...
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1answer
45 views

about hardware accelerator for video processing

If we enable hardware accelerator in the applications how the code flow happens to the hardware accelerator.If not how the flow will be? e.g. if hardware accelerator is enabled then encoding and ...
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26 views

Incorrect black level and white level shift in chrome browser

My video shows perfect black (0,0,0) and white (255,255,255) levels in mpc-be player. When I open the same file in Chrome browser they are shift a bit to (1,0,1) and (255,254,255). What might be the ...
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1answer
55 views

Extracting Subtitles from mkv file

I have installed MKVToolNix and Subtitle edit. I was able to extract subtitle using Subtitle edit through OCR. While it usable, it comes with a lot of errors. Now I thought of using MKVToolNix to ...
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18 views

What is the format for a .vfs file for VideoMakerFX? [closed]

In VideoMakerFX you can open .vfs files which contain slides and animations. I need to know if this is a proprietary format, or some common open-source format, i.e. something that a person with the ...
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14 views

What software can create .fvs slides for VideoMakerFX? [closed]

What software tools can be used to create .vfs slides/template file for VideoMakerFx? The vendor provides their own .vfs packages, but I want to create my own or hire someone to do so. But I don't ...
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1answer
87 views

Visually lossless 1080p to 720p using ffmpeg

I have an mkvvideo file which is 1080p Video: hevc (Main 10), yuv420p10le(tv), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default) Can someone help me convert it to ...
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21 views

Cross-Merge Many Videos

I have one folder with 30 videos, and another with 4. I want to merge the 30 first video as an intro to the 4, in order to create 120 different videos. In other words, imagine letters are intro videos ...
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1answer
19 views

What options to use to convert video with a given video/audio/subtitle stream?

I want to use ffmpeg to convert an video file to an output file containing one specific audio file and one specific subtitle stream. The streams I want to choose are the following: Stream #0:0: ...
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31 views

ffmpeg convert Apng to Webm didn't delete frame that already play [closed]

edit my problem is the output video got shadow of the previous frame in fact, it's not just shadow it is the previous frame not delete out so it overlaps each other because it is a transparent video ...
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1answer
29 views

FFmpeg concatenating outputs with different times causes blank stream

I'm working on a video editor and have a timeline. The inputs in the timeline need to go through the scale filter. Then the output of that needs to go through an overlay filter. They get overlaid on ...
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28 views

“Non-monotonous DTS in output stream” when capturing video with ffmpeg

I'm trying to capture VHS video on Linux using a new USB capture device and FFMPEG.  I'm able to successfully capture either only audio (using Alsa), or only video (using v4l2) but when I try to do ...
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20 views

How to create .vfs slides/characters for VideoMakerFx [closed]

Is the .vfs slides/template file for VideoMakerFx a proprietary or open/standard format? If I want to hire a freelancer to design customer characters and slides, what do I tell them to create (and ...
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0answers
49 views

FFmpeg remove black border on bottom of video?

I am pretty happy with this command. It takes three image inputs. Adds a fourth white background input that sets the size of the video and acts as a canvas. The three inputs go through the scale ...
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1answer
29 views

ffmpeg fails with gource output, how can I fix this? - Error while decoding stream #0:0: Invalid data found when processing input

ffmpeg version 4.2.2 Gource v0.51 Running ffmpeg to produce an mp4 from Gource output: ffmpeg -y -r 60 -f image2pipe -vcodec ppm -i clearcase.ppm -err_detect ignore_err -vcodec libx264 -preset slow -...
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47 views

Input buffer exhausted before END element found when i try to add watermark to video [migrated]

I am getting this message with the crash in my app whenever I am trying to add a watermark to the video[Specific video]. also, this message and crash are caused by the only specific video that I ...
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53 views

30 Hertz Video Output on 60 Hertz Monitor

I'm considering purchasing a laptop with two video out ports. One is HDMI at 30 hertz, the other is MiniDP at 60 hertz. I want to use both ports in a dual monitor setup. Both monitors have a 60 hertz ...
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16 views

Insert short videos into segments of long videos with ffmpeg

I have 1 hour videos and 1 minute videos. I want to insert 1 minute videos into 5 long videos (at 10, 20, 30, 40, 50 minutes, every 10 minutes to finish). When I insert a short video, the long video ...
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1answer
19 views

FFMPEG Raw Video Restreaming

I captured raw video (yuv 4:2:0) from network and now trying to resend it. ffmpeg -f rawvideo -v info -pixel_format yuv420p -video_size 1240x1024 -framerate 25 -i out.raw udp://225.0.1.115:5000 but ...
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19 views

Merging video and multiple audio tracks with ffmpeg or other software [duplicate]

I'm looking for someone who can help me to do a script. The idea is : We have video files named like this : 08-02-02h-34mn-17s_quentin.mov And audio files named : 08-02-02h-34mn-17s_quentin_bureau....
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1answer
46 views

Slideshow with ffmpeg results in stuttery, unseekable, incorrect length file

I'm using ffmpeg to show images for different durations in a video: (command taken from example on this page) ffmpeg -f concat -i input.txt -vsync vfr -pix_fmt yuv420p output.mp4 Here what input....
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32 views

Can I use the timeline of an embedded video as data slicer

I would like to explore data captured during motorsport events. Ideally I would have an embedded video in Excel and as I move the timeline of the video I can highlight/filter the values of several ...
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1answer
35 views

ffmpeg loudnorm filter for short media

I am trying to use ffmpeg to determine the overall media volume. I use only one pass : ffmpeg -i C:\Users\User\Desktop\test.mp4 -af loudnorm=I=-23:tp=-1:LRA=15:print_format=json -f null - Out: ...
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39 views

How to use the `onfail` option properly in ffmpeg command?

I have a command, which takes the input and generates 2 outputs. 1st is encode the video, 2nd is burn the subtitles in the video(if the input has subtitles in it). P.S My input video is live and ...
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1answer
27 views

I'm trying to render a MP4 with these settings but it doesn't work

ffmpeg -i Power_1080p.mp4 cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 ...
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1answer
88 views

-to position parameter in ffmpeg doesn’t specify timestamp, acts as duration instead

If I try to cut out a section of the video from 30th second till 60th second (duration of 30 seconds), I would usually do it like this: ffmpeg -ss 00:00:30 -i inputVideo.mp4 -c copy -t 00:00:30 ...
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0answers
15 views

ffmpeg SpeedHQ codec decoding

I am using ffmpeg for shq codec(SHQ2 and SHQ7). Creating AVCodec with SHQ is fine: codec = avcodec_find_decoder(AV_CODEC_ID_SPEEDHQ) But this fails: parser = av_parser_init(AV_CODEC_ID_SPEEDHQ); ...
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23 views

Stuttering bluetooth audio only with YouTube

I own a pair of RP-HF-400B Panasonic bluetooth headphones. They work very well when paired with my Android phone. When I use it with Windows10 I have stuttering audio when YouTube is playing (it ...
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0answers
12 views

What resolution is used by Skype when one is sharing the screen or having a video conference?

Skype for business (win 10) can share your screen when you are having a voice chat. So people can see what you are doing on your computer. Alternatively, one can use a camera to let others see his/her ...
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39 views

“Non-monotonous DTS in output stream” error in FFmpeg, previous and current values are equal

I have a number of .ts segments (AES-128 encrypted), .m3u8 chunklist for them and a key to decrypt them. My goal is to remux these .ts files into one .mp4. I also obviously don't want to modify the ...
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0answers
37 views

FFMPEG Extracting MP3 from MP4 returns shorter audio file

I have lost so much time over this problem and really need some professional help. Over the last days I recorded some VHS tapes, I used ffmpeg which worked great! When I finished, I noticed that must ...
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1answer
56 views

FFmpeg: Change centered Zoom In effect command to Zoom Out

I have the centered Zoom In effect command which works perfectly. Here is the command fmpeg -y -r 25 \ -loop 1 -t 6 -i 1.jpg \ -loop 1 -t 6 -i 2.jpg \ -loop 1 -t 6 -i 3.jpg \ -loop 1 -t 6 -i 4.jpg ...
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1answer
30 views

How to convert .s files to .mp4 files

I have .s video files from a DVR backup. I can only view them with an MCD player. I need the videos in a format like .mp4 or .avi or any other format so that I can process them. I have tried using ...
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1answer
37 views

What's the difference between coded width and width in FFprobe

Pretty much the title, what's the difference between coded width (or coded height) and width (or height) in FFprobe, why are they sometimes different and which is the right one? width=1920 height=...
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39 views

Linux USB video capture issues

I purchased the Hauppauge USB-Live 2 capture device because several recent Amazon reviews suggest it should work with modern Linux kernels. When I plug it into my Raspberry Pi 4 running the latest ...
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1answer
57 views

FFmpeg: Zoom with xfade filter doesn't work

I need to create a video with the centered Zoom In (Out) effect and xfade Here is the command with which I've tried to do it ffmpeg -y -r 25 \ -loop 1 -t 6 -i image1.jpg \ -loop 1 -t 6 -i image2....
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0answers
63 views

How to decrypt .ts files into separate .ts files with ffmpeg without using a playlist?

I have a number of .ts files, .m3u8 playlist and a key to decrypt them. The key is a file, not a hexadecimal string. My goal is to decrypt some of these .ts files to analyze them individually. I also ...
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1answer
26 views

Make looping left-right transition on overlay image with ffmpeg

I am trying to have an output video using ffmpeg with: a base video "video.mp4" a static overlay image "staticimage.png" an overlay image that makes looping transition left-right "movingimage.png" ...
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1answer
130 views

How to download video with JW Player blob url?

I am looking for a solution for downloading videos embedded using JW Player Blobs in web pages. I have seen some answers for twitter/vimeo/other blob situations but not seen an answer to JW Player ...
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1answer
107 views

Microsoft Teams - Why can't I record a meeting?

I called my colleague on Microsoft Teams and my intention was to record the call (video + audio). However, there was no option for recording the meeting. Why is the recording option not appearing on ...
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1answer
33 views

FFMPEG - merge mp4's side by side and apply watermark

I have one ffmpeg command that merges 2 mp4 videos together side by side and then another command that applies a watermark to the output video of the first command. The commands are: Merge Side by ...
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1answer
44 views

Issues with ffmpeg hardware accelerated encoding and yadif

I have a interlaced videos in mts container and would like to convert them to non-interlaced in mkv container, posibly in HEVC. I tried following command line: ffmpeg -y -hwaccel qsv -c:v h264_qsv -...

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