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

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0answers
51 views

How to blend videos using ffmpeg?

I have 2 videos 3 seconds each. This videos are filtered with ffmpeg's zoompan filter. I need to make smooth transition between them with blend. I'v tried ffmpeg -y \ -i 1.mp4 \ -i 2.mp4 \ ...
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votes
1answer
23 views

How can I merge audio and video stream with delay

Let's say I have audio.m4a and video.m2v and the video stream starts approx. 13 sec with the expected sound output but my audio.m4a immediately. So I have to merge it with a delay! I tried already ...
0
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0answers
50 views

FFmpeg filter graph (multiple crop)

I have an input video (0) and multiple images (1) (of the same sizes which context is aligned at (0,0) - as FFmpeg does not receive multiple images of different sizes over pipe). I want to overlay ...
1
vote
1answer
85 views

FFmpeg video overlay

I am trying to overlay an input video with many images where each image should be shown for a short time. I achieved this using complex filter (the command below). The problem is that I have many, ...
3
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0answers
51 views

Watching YouTube and saving network usage

Like me, some people may be constrained by the monthly cap they can consume the Internet usage. Thus, my question is, Will replaying YouTube videos again cost you twice the network usage? I always ...
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0answers
242 views

Stream video from camera using ffserver on Raspberry Pi?

I'm trying to stream video from the camera module using ffserver. The idea is to let raspivid output h264, and let ffmpeg/ffserver stream it without re-encoding. My server configuration is HTTPPort ...
1
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0answers
22 views

FFMPEG: Creating video stream from non-consecutively numbered png sequence

I have used VLC to decompose a video stream into frames, and it decomposed in a way that it leaps 5 frames per save, so the images are ordered like this: scene04436.png scene04441.png scene04446.png ...
1
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1answer
173 views

ffmpeg video recording freezes after “Invalid data found when processing input”

I am trying to record my old VHS tapes using a USB video capture device and the following command: ffmpeg -f alsa -ac 2 -i default -f v4l2 -standard pal -i /dev/video0 -c:v libx264 -qp 0 -preset fast ...
0
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1answer
69 views

FFMPEG command to apply echo effects

How to apply echo effect on a video (sound) using ffmpeg. Please advice me ffmpeg command for the same.
1
vote
1answer
47 views

Data loss due to transcoding video[ffmpeg]

I have a app which takes in user's video and does some processing. the processing pipeline consists of multiple steps. The code which i have written so far assumes h264 codec for input video. But ...
1
vote
2answers
54 views

bash process to copy subtitles in their respective mp4 with FFMPEG

I have many video files (mp4), with their respective subtitles (each video and subtitle have the same name). The idea create a bash to copy each subtitle in their video without re encode again. To ...
0
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0answers
27 views

FFMPEG video cutting

When using fast seeking in FFMPEG (seek before i option) and by specifying the time to retain, is there any way to tell which frame is actually split-frame ? So using this: ...
1
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0answers
55 views

ffmpeg pipe images extracted from video

I can use the following command to extract images from a video using ffmpeg, saving them to the filesystem: ... | ffmpeg -i - -f image2 'img-%03d.png' I would like to pipe these images to another ...
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votes
1answer
78 views

overlaying in ffmpeg failed due to audio codec how to fix it?

I am using ffmpeg to overlaying searies of images on video but on some occasions on some mp4 videos it fails some time it works perfactly my command gives error like Could not write header for output ...
1
vote
1answer
308 views

Internet explorer 11 under windows 10 does not play HTML5 videos

For some reason, my internet explorer just will not recognized HTML5 videos. I'm fairly certain that my computer is at fault, because my colleague has tested it with his W10 IE11, and it works. ...
0
votes
2answers
41 views

Play videos on old Computer

I have a Pentium 4 3.6 GHz, D945GCR Intel board, no external graphics card and 1GB ram pc. Recently I got it upgraded from Win 7 to Win 10 (after years... only to see how it works!). But I can't do ...
0
votes
1answer
36 views

FFMPEG overlay filter partly conversion

I am trying to apply the overlay filter on the video to blend a single image for a few seconds. Since my video duration is about 1 min it seems wasteful when FFMPEG tries to re-encode the whole video ...
0
votes
1answer
100 views

FFmpeg converting video convert only audio in linux

I'm trying to convert .flv to .mp4 in CentOS. I used ffmpeg -i test.flv test.mp4, which worked well in Windows, but in Linux the result has no video, just audio. I installed ffmpeg 3.0 using yum. ...
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0answers
37 views

what are the factors affecting video streaming speed?

I use a windows 7 and chrome browser for streaming videos, but I have lags in buffering and playing online videos. I have a 75MB internet connection and I use wireless router. My roommate has a ...
0
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0answers
37 views

ffmpeg: demux a section of a file

I have an interesting challenge that I think can be solved with ffmpeg. I'm being sent the first few hundred kb of a file (mov/prores or h.264), and a 1-2 meg chunk from the same file, closer to its ...
0
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0answers
24 views

Video view/plugin vine and Instagram use

What video view or plugin does vine and Instagram use for their apps and websites, like for the unique look and tap to like and in focus video playing
-1
votes
1answer
49 views

Can I use my Windows 7 laptop without any video drivers installed?

For the past two days I've been grappling with an annoying white screen issue that happened whenever I did anything or even at boot, but never at random times. It's possible that it was the video ...
1
vote
1answer
34 views

How to stop MP4 file from stuttering in Linux

Playing an HD MP4 file in Ubuntu stutters using Movie Player or LibreOffice Impress. Interestingly, when using VLC, it plays perfectly smoothly. I have noticed that in system monitor, when playing ...
0
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0answers
25 views

Display issue from computer to TV

I have my computer hooked to my Tv via HDMI. It shows the the computer screen I'm looking at. If i have another tab open,is it possible to display that tab on the TV and work on the other page?
1
vote
1answer
36 views

Limiting ffmpeg output

I just started compiling my own ffmpeg. I noticed with the precompiled builds, there is not a lot of output while ffmpeg is running, -nostats option. Is there either a way to compile those types of ...
0
votes
1answer
40 views

FFmpeg - possible to select X frames every N frames?

I am trying to select 10 frames out of every 100 frames of video and write that to a new output. In a 1000 frame video, I want the output to only include frames: 1-10, 100-110, 200-210... etc. Is ...
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votes
2answers
35 views

Combine video and audio and make the final duration the same as first input with FFmpeg

I have two files - video.mp4 and audio.mp3, and I want to combine them. The final video must have duration of the video.mp4. I don't know which of these two files is longer so I cannot use the ...
0
votes
0answers
19 views

How to withhold from a web site information of tab moving from foreground?

I have a video in one of my Chromium tabs which stops playing when I switch to another tab. I guess there is a way to not notify a tab that it is out of focus? Or maybe Javascript could be edited... ...
1
vote
1answer
55 views

Merging several videos with audio channel and without audio

I need to merge very different videos into a one output video. Input videos can have different resolutions, framerate, channels and so on. So some videos can be without audio channel and should be ...
0
votes
1answer
53 views

get timestamp of a keyframe exactly before a given timestamp with FFmpeg

I want to cut lengthy segments of a video file and then join them. But without re encoding precise cutting isn't possible as ffmpeg seeks to the key frame before my listed time stamp and cuts from ...
0
votes
0answers
12 views

How to stitch tubechop videos together

I have used tube chop for the first time. I used it to chop up 1 video in 4 shorter more relevant videos. I now want to stitch these together so they continually play instead of having 4 URL's. Any ...
1
vote
1answer
126 views

Extract alpha channel from webm video

I'm trying to extract a mask from a webm video with alpha transparency: ffmpeg -i test.webm -vf "alphaextract" -y output.mp4 But I'm getting an error: [Parsed_alphaextract_2 @ 0x7f924b700d00] ...
3
votes
1answer
95 views

How do I use ffmpeg to split a video into images and then reassemble exactly the same?

I have an MP4 which has an audio and video streams and I need to modify every frame of the video. The pipeline I'm using is: Split the audio out of the video: ffmpeg -i in.mp4 -vn -acodec copy ...
0
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0answers
17 views

MacOSX Quicktime player to view iphone screen

I used to be able to open Quicktime player to project my iphone's screen to my mac os. It seems I am not able to do so in the latest Mac OS El Capitan? My setup: Mac OS El Capitan iPhone5s/ iOS 8.2 ...
1
vote
1answer
214 views

Batch convert a folder of .mkv files to .m4v files using ffmpeg in MAC OS X

Is there a way to batch covert a folder of .mkv files to .m4v files using ffmpeg in Mac? I setup a service that will do individual files, but I really would like to batch them. The 'Run Shell ...
3
votes
1answer
88 views

Video calibration: why does my laptop show grey instead of green, light blue, and pink?

My laptop has been having this weird behavior with videos, especially if they come from streaming sources. Green objects, such as trees, lawns, and leaves are rendered in grey. Sometimes it happens ...
0
votes
2answers
159 views

FFMPEG audio out of sync when transcoding (demuxing) from DV

I've been stuck with this problem for months. I have over 50 DV tapes (from and old Sony camcorder) to be converted to a more modern, usable format (most likely H264). I've started off with pulling ...
3
votes
5answers
624 views

Why does my internet get disabled during an upload to YouTube?

If I start a file download before starting the video upload then the download will continue at full speed while the video uploads, but if I try to navigate to any webpage on any device on my network ...
1
vote
2answers
87 views

Reduce video frame rate without dropping useful frames

I have a video from a security camera that was originally recorded at a low frame rate, maybe 15 fps, maybe 10 fps, maybe even less. It has since been converted by someone else to 25 fps (without ...
0
votes
0answers
31 views

Not able to add time stamp using ffmpeg

I am trying to add time stamp over a video using ffmpeg : Below is my command which i am using for adding time stamp to image Adding Time Stamp to Image: ffmpeg -i "C:\Temp\android\My Movie.wmv" ...
0
votes
4answers
64 views

Which program I can edit video (cut some scenes) without increasing the video's size

I have a video: Input.mp4 - length: 29 min 6 sec - size: 120 MB I use Microsoft Movie Maker 2012 (Movie Maker is included in the Windows Essentials 2012 program suite), to cut some boring scenes and ...
1
vote
0answers
14 views

Prevent AVCONV from upgrading A/V quality

I am trying to convert all video files of different formats and qualities into one semi-standard format. Thankfully avconv makes this reasonably easy. This is the command that I am using: IFS=$'\n'; ...
0
votes
2answers
144 views

Settings For ffmpeg For Best VP9 Quality for Web Publishing

I have video in Apple ProRes 422 format which I plan to encode to Google's VP9 for publishing on the Web. The source is: Stream #0:0(und): Video: prores (apcn / 0x6E637061), yuv422p10le(bt709), ...
0
votes
1answer
79 views

Is it possible to overlay video with alpha channel over the desktop in real time (Windows)?

I'm going to run a pen&paper RPG game and one of my players will participate via Skype. I have this idea, to make his appearance more immersive, to cast some sort of futuristic HUD over the video ...
0
votes
1answer
30 views

Downscaling Resolution

I was wondering if the resolution matters when downscaling. Basically - if I convert 1080p to 480p and 720p to 480p, would the results look the same since they are being downscaled to the same ...
0
votes
1answer
112 views

Smart Trim an h.264 .MP4 Video file in ffmpeg

I would like to take live-captured h.264 video as an input and trim it to start in a fade up from black and end with a fade to black with as little encoding as possible. These fade in/out points may ...
0
votes
0answers
17 views

windows 7 pro- import pictures and video wizard does not close after importing images

This is a problem I never had on this computer, until recently when it suddenly started (may have been after a windows update...not sure). After importing the images via USB cable from my camera, ...
4
votes
3answers
1k views

How to block/disable all videos from automatically loading in Chrome?

Many sites now have auto-playing or automatically streaming videos: embedded in news pages, down side bars promoting other content, and some sites even have massive honking-great purely decorative ...
1
vote
2answers
74 views

Is there any advantage of reencoding a 480p video as 1080p?

To be specific, I mean importing a 480p video into Movie Maker and exporting it as a 1080p MP4? Is there an advantage?
1
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0answers
101 views

Open a video in VLC from browser (not plugin)

I'm hoping to find a way in which I can automatically open a video into VLC from a browser (likely Firefox). For example I have a video at http://ip/video.mp4. And I'd like to be able to click on the ...