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

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14 views

Redirect a video monitor

I don't know a lot about the internet, nor video, but I thought I'd ask here anyway. I have an old Motorola video monitor that is "hard coded" to send all audio and video to the company server, ...
2
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2answers
39 views

Add TITLE and COMMENT metadata to .MOV video file?

In Windows 7, I load a .MOV video file in VLC Mediaplayer. In VLC, I press CTRL+I to show the Media Information dialog of this file: Media Information dialog I enter a new TITLE and a new COMMENT ...
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2answers
54 views

What happens when I display 1080p video on a x720 resolution setting?

This one puzzles me, and I'm looking for a very technical answer. Say I'm on YouTube and I chose 1080p for the video resolution. However, my screen's resolution is 1280x720. This means I'm ...
0
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1answer
51 views

ffmpeg: re-encode a video, keeping settings similar

I'm dealing with some mp4 videos that were encoded on mobile phones and are pretty huge. I think ffmpeg can do better. I'm trying to figure out what flags to use to preserve fps, resolution, and ...
1
vote
1answer
14 views

Estimate video size for different resolutions

I am developing a web application for a customer, basically I need to estimate the costs of storing photos/videos on AWS for our user database. I'd like to know the average size (or size range) of 1 ...
0
votes
1answer
21 views

ffmpeg fails to add subtitle to video on mac

I use this command fmpeg -i out.mp4 -i drbraun.ass -map 0 -map 1 -c:v copy -c:s mov_text out1.mp4 and get the output as the following, while the output file has no subtitles in it. I guess it might ...
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0answers
32 views

Increase buffer Video on FFmpeg

I apply the following command on FFmpeg: ./ffmpeg -re -i 'udp://237.0.0.1:1234?buffer_size=2000000&fifo_size=1000000' -vf scale=720x480 -c:v libx265 -c:a copy -f mpegts 'udp://239.0.0.1:1234?...
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0answers
45 views

'Invalid pixel format error' when converting from mj2 to ffmpeg

I've been trying to use ffmpeg to convert some mj2 files to mp4, but I can't figure out the correct flags to pass Naively, I tried things like ffmpeg -i vid_in.mj2 vid_out.mp4 but I get errors like ...
0
votes
1answer
52 views

Convert Audio 5.1 to Stereo [closed]

I am having issues playing the MKV video files I download on my friends TV, the TV shows I download have been playing just fine with no issues. The video portion of the files play flawlessly however ...
0
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2answers
98 views

How to join split flv files?

I'm in my 3rd day of trying to download one 4-minute video. It's a Flash FLV that's split into three parts, the first two are about 5MB, the third about 3MB. Only the first part has normal FLV ...
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2answers
61 views

Will Second 2560x1440 monitor slow down my iMac?

I have this iMac: http://www.hoxtonmacs.co.uk/collections/imac-27-inch/products/imac-27-inch-core-i7-3-4ghz-mid-2011 It has 32GB RAM, and I use it to edit videos in Final Cut Pro X and make music ...
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0answers
54 views

Create timelapse video with frame integration using ffmpeg

I have a real-time 30fps video, and I wish to convert it to a timelapse 30fps video so that each frame of the target video is the result of arithmetical mean of 10 original frames in a linear color-...
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2answers
64 views

My videoplayer is suddenly buffering local videos

Today I was watching Band of Brothers which I have stored locally on my hard drive in 720p. Watching the first two episodes went perfectly as usual, however when viewing the third episode my Kodi ...
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0answers
191 views

ffmpeg rtsp stream recorded no audio on output file

I am tying to record video and audio using openRTSP and ffmpeg. The below command record video but the it doesn't contain audio. openRTSP -D 10 -v -t -c -b 800000 rtsp://wowzaec2demo.streamlock.net/...
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0answers
34 views

Automatically join or trim many video files

I have two underwater network video cameras on a deep-sea observatory that are tethered to land by a fiber optic cable and stream video data back to shore. I'd like to find a way to automatically cut ...
0
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0answers
31 views

Subtitles in VLC are wrong

I have an .MKV file and the subtitles are incorrect I tried with different encondings as this answer states, but I with no luck. The subtitles are embedded inside the file so I can't open them in ...
0
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0answers
15 views

Detect missing chunks of video

I (non-illegally) download videos using Frostwire, and I'm not sure if the way the torrent downloads the file causes this or what, but when I open an incompletely downloaded video file (in VLC Media ...
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0answers
41 views

Better solution to video capture

I'm looking for ideas, then whatever solution will be welcome :) I have an infrastructure that I used 20 EasyCap USB2.0 in 10 different computers to capture video via ffmpeg by ffdshow (2 usb for ...
1
vote
1answer
87 views

“Proxy” for streaming video

I am investigating playing live streamed video at an event venue, to a large number of Wifi connected devices. Set up would be: Camera -> PC -> cloud streaming server (like Wowza) -> wifi AP -> ...
0
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0answers
39 views

ffmpeg: Input Link Top Parameters Do Not Match Second Input Link Bottom Parameters

I'm trying to do a slideshow with transitions as described here: Create video with 5 images with fadeIn/out effect in ffmpeg (crossfade example) But it seems my SAR values are mismatched, so I keep ...
0
votes
1answer
98 views

Create a video with 5 images with fade in/out, zoom pan, and slide left/right

I have to create a video with 5 different images 3 sec for each with the following sequence Fade Out Fade In Zoom Slide Left Slide Right I do not know about sliding filter command and also zooming ...
0
votes
1answer
27 views

Slow video playback older iMac

I have an iMac from 2006 with an intel core duo @ 2GHz and a RadeonX1600. Video in VLC or Quicktime play flawlessly without any choppiness, however in the latest Firefox browser, YouTube and pretty ...
0
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1answer
134 views

FFmpeg RMTP streaming and simultaneously saving to file

I am using ffmpeg.exe to transcode a video source, in this example below from a file and want to simultaneously stream rmtp and save to file. I can't figure out what am I doing wrong with the "tee ...
0
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0answers
154 views

How to install NVIDIA VIDEO CODEC SDK?

I need it for use with FFmpeg to accelerate encoding. I've downloaded nvidia_video_sdk_6.0.1.zip from their website here but there is absolutely no information whatsoever about how to install it on ...
0
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0answers
24 views

downloaded videos without end point.Can't scroll through

I have a habit of capturing videos from online streaming sites using IDM and problem is they show duration in mediatab but while playing them in different players they don't show total duration and I'...
1
vote
1answer
339 views

How will you get youtube link from the following embed URL

I want to watch this video on YouTube but I found this embedded in a site. Is there a way to retrieve the youtube.com URL from this embedded URL ? <embed src="//www.youtube.com/get_player" type="...
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0answers
17 views

PSNR-HVS-M - Between-coefficient contrast masking of DCT basis functions

So there doesn't seem to be much material on the internet regarding these PSNR variants. PSNR-HVS: Peak Signal-to-Noise Ratio taking into account Contrast Sensitivity Function (CSF). While I don't ...
0
votes
1answer
242 views

Chrome's high CPU utilization when playing Youtube 1080p@60fps videos (x 3-4 compared to Edge for same codecs) + more dropped frames

When I play full-screen 1080p@60fps Youtube videos in Chrome (with MagicActions extension), my i5-4570T CPU hovers around 35-45%. Playing the same video in Edge takes up only 10% of CPU. Both use the ...
0
votes
1answer
179 views

Data Stream encoding not supported yet (FFmpeg)

I have a problem in my project, using FFmpeg. I am trying to use the -map option on the following way. ./ffmpeg -i input.ts -vf "scale=720x480" -map 0:p:59512 -c:v libx264 -preset slow -crf 23 -c:a ...
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0answers
26 views

combine 2 half-height video sources into one combined video using ffmpeg [duplicate]

Using ffmpeg.exe (under Windows) , I want to produce a 1280 by 720 pixel video that combines half-height -cropped versions of two video sources (input streams) that are stacked atop one another. ...
0
votes
2answers
49 views

Combine multiple audio files and one picture to produce a video

I've read this thread and this other one. They both explain well how to join a picture with an audio file to make a video (with ffmpeg). However, I'm looking for a ffmpeg command that would merge a ...
0
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0answers
4 views

How can I modify the IFO file so the main chain of cells is duplicated?

I want to make the same video run twice before it's over. So if I have 3 VOB files in one folder, I would like to avoid making 3 copies. Instead I would like to just edit the IFO file so that the ...
1
vote
1answer
41 views

How can I make mpv show the duration counter constantly?

I use the mpv video player in Linux. With the keys Shift+P, I can see the duration of the video I am watching. How can I set mpv to show the duration all the time (without the need of pressing Shift+...
0
votes
1answer
27 views

How to convert Adobe Premiere Elements 12 file to some other program that renders faster?

Yesterday, I used Adobe Premiere Elements 12 for the first time. I spent hours and hours carefully editing a video that is 30 mins long. Then, when I went to render (export) it to 1920x1080 30fps mp4 ...
1
vote
1answer
48 views

Reduce Generated GIF Size Using FFMPEG

I'm developing android application that converts mp4 files into gifs using ffmpeg. Problem is that generated gifs are huge in size. And another problem is that I can't use anything else than ffmpeg(e....
0
votes
2answers
65 views

Downsize 1080p video to 720p [closed]

I have a 1080p HD video and I want to reduce its size by converting it to 720p. I know there are software programs capable of doing this(Handbrake, Vidcoder, FFmpeg, etc.) but instead of the file size ...
0
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0answers
58 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 \ -...
0
votes
1answer
29 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
votes
0answers
70 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
138 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
votes
0answers
52 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 ...
0
votes
0answers
306 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
24 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 ...
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1answer
250 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
votes
1answer
107 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
52 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 user'...
1
vote
2answers
67 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
35 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: http://stackoverflow.com/...
1
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0answers
75 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 ...
0
votes
1answer
101 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 ...