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

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23 views

avconv huge output file size

I am trying to rotate some mp4 videos (shot with an Android smartphone) 90 degrees clockwise. I have been using variations of the following command: avconv -i 20150604_192846.mp4 -c:v libx264 -preset ...
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31 views

Splitting audio out with ffmpeg, recombining with video, inserts black frames at beginning

I am using ffmpeg to split out the audio from a video file, converting it to a wav, and then recombining it with the video. When I do this, the new video has black frames at the very beginning. Here ...
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16 views

Dual monitors on one screen in OSX Yosemite?

I am seeking a way to keep a permanenent small window in the corner of the screen that can show video, while working on multiple desktops (TotalSpaces 2), without the window getting affected. In the ...
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32 views

How to fix video and audio out-of-sync (sometimes)?

I have a avi video file which plays perfectly on Linux (using e.g. mplayer) and on one TV, but when using another TV the audio happens to be out-of-sync with the video by about 5 seconds! This does ...
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29 views

What techniques can I use for audio and/or video chat that don't use SIP and complex layered architectures?

Point A few years ago a friend and I were messing around and we created a super-simple video chat link by running VLC twice on both our computers: one "watched" the local webcam and cloned the video ...
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49 views

How do I play video that can speed up, slow down, & play backwards?

I have the problem of needing to play a video while being able to arbitrarily increase or decrease the playback speed, as well as being able to have negative playback speeds (watching the video ...
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19 views

FFMPEG set a upper limit to bitrate only a a interval of video

How i can define a variable bitrate from 500k to 1024k between 0~1min30, between 1min30~3min up it to 2048 to 4096 and from 3min until end down it to 500~1024 again?
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74 views

Live TV streaming with Tvheadend works fine on laptop, but not on home server

I have a DVB-T TV tuner USB dongle (Afatech AF9013/AF9015) which I'm using in conjunction with the latest version of Tvheadened and the latest stable build of Kodi. I ultimately want my small home ...
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14 views

What is the difference between Burning via Data Size over Time Duration

Assume i have 2 Video Files, both 20 minutes long, both same format. one is 2 GB (File A) and one is 200 MB (File B) because it's been heavily compressed. Now if i remember correctly i can burn 120 ...
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69 views

how to speed up the process of the ffmpeg command

I want use the overlay filter to composite the video with some image, Command is ffmpeg -i 30.mp4 -i out1.png -i out2.png -strict -2 -filter_complex "[0:v][1:v]overlay=enable='between(t,0,1)' [out]; ...
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71 views

ffmpeg generates videos with start time greater than 0

I'm trying to cut videos with ffmpeg. I know how to do it in the "normal way": ffmpeg -i test.mp4 -ss 0 -t 6 -c:v libx264 -profile:v main -level 3.1 -preset medium -crf 20 -r 25 -b:v 1200k -minrate ...
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69 views

FFMPEG How do I use the apad filter in a chain of filters in filter_complex?

My input is a video file with an audio track. If the audio is shorter than the video I need to extend the audio track to the length of the video. It works great with the apad filter: "C:\Program ...
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39 views

FFMPEG results in a black video from converting images

I am attempting to create an mp4 video from a sequence of images numbered 1 to 100. The problem is that I keep on getting an output video that is black. Each images is as such all the way to 100. ...
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57 views

Configure ffmpeg and ffplay to PAL signal

I have a PAL camera and a stk1160 based video grabber, which is correctly recognised as a /dev/videoN under linux. I am able to watch the feed with vlc after setting up the video standard as a PAL: ...
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45 views

Get mplayer to display current time in hours and minutes

By default mplayer displays the current location in the video in seconds, which is less than useless. Example: A:4086.2 V:4086.2 A-V: 0.000 ct: 0.039 0/ 0 17% 2% 2.1% 3 0 ^--------^----- ...
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24 views

Video card not working only on one computer

I got this weird problem. My girlfriends computer suddenly just stopped displaying any picture oon the screen. Video card is Nvidia GF9400GT, which is originally silent, but I've added one 60mm fan to ...
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56 views

Can someone explain what “video acceleration” is?

Basically, a user came to me complaining that when she opened a certain video file in VLC, she received an error saying: "Your video output acceleration driver does not support the required ...
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301 views

avconv stream video from USB webcam without delay

I need to stream video from USB webcam. I am using avconv, but it has delay min 5s. Is possible to stream in real time without delay? avconv -f video4linux2 -i /dev/video0 -vcodec libx264 -f mpegts ...
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45 views

MPEG DASH with H264 + H265

I've tried to build an MPEG-DASH stream coding some bitrates in H264 and some others in H265. In a nutshell I'm trying to code the same video with ffmpeg for the lower bitrates in H264 and the highest ...
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69 views

Trying to identify the cause of this display corruption

I don't actually know where the root cause of this issue lies or even how to accurately describe it so I will do my best to provide the details of the situation. Hopefully someone will have a better ...
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292 views

How to add zoom in effect to a video?

I'm working in a project where I should generate a video, from an input set of videos or images. The problem is when I generate the video I must add a zoomin effect to each input element. I solved ...
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43 views

Importer screen stays empty

I'm trying to record my old video tapes on my computer, using the Pinnacle Studio 700 PCI Card and Windows 7 Ultimate (SP1, 32 bits). The PCI card is recognized as Pinnacle AV/DV2 and the most recent ...
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33 views

How to test videos for artifacts?

I am having some issues with videos where the encoding gets choppy for a stretch: frames jumping back and forth, pixels bleeding from one frame into another. Like in this video right there. I know ...
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232 views

FFmpeg Unable to find a suitable output format for … [RPi]

I was trying to set-up ffmpeg on RPi to stream video from webcam. This is my launch script: ffserver -f /etc/ffserver.conf & ffmpeg -v verbose -r 5 -s 640x480 -f video4linux2 -i /dev/video0 ...
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161 views

How to set profile compatibility of an fMP4 using ffmpeg?

I'm using ffmpeg to generate a fragmented mp4 stream that will be consumed by an HTML5 player. I think I have a correctly formatted mp4 stream of data with an empty moov at the start and a series of ...
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37 views

How do I view an AVI file that requires GTCC codec?

I have pretty much tried every type of decoder package out there (K-lite, CCCP, Satsuki, etc.) but no luck. I used an old webcam back in the early 2000s when recording. Really need to know what this ...
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31 views

How can cut the time it takes to tag videos using Windows Explorer?

When I try to tag a video using windows explorer it takes roughly 10-20 seconds for it to complete. If I try to tag multiple videos using the same tag it takes even longer? How can I cut this time ...
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176 views

FFMpeg generated m3u8 segmented videos long delay before playback starts

I am using ffmpeg to generate a segmented list of files in order to stream them to an iOS app. The list of files is generated fine but when it comes time to play them, the video needs to be downloaded ...
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283 views

Trying to retrieve deleted Facebook videos from the cache

I viewed two videos on Facebook. Seconds before I could download them, the user deleted them. I've been trying desperately ever since to find them on my hard drive. I viewed them on Firefox. I ...
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11 views

modify overlay on video previews in the Explorer sidebar

I want to get rid of the stupid overlays that video files are shown with in the Explorer sidebar in Windows (7, but other versions as well). I mean thanks, but 1995 rang and they want their UI design ...
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280 views

ffmpeg add alpha channel to a video

Basically I have a video with a green background, and I mean a perfect green background (red = 0, green = 255, blue = 0) and I want to convert this to alpha (i.e add an alpha channel where 0 255 0 ...
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67 views

Higher overlay modes on Freescale i.MX 6 Dual

I am playing 1080p video on Freescale i.MX 6's IPU 0 Display 0 Background DI (/dev/video16) and want to overlay it with Qt application via Overlay DI (/dev/fb1). It works really great, but only in ...
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173 views

How can I reduce the choppiness of my ffmpeg conversions

Here are the options I'm sending ffmpeg: ffmpeg. -i input.flv -crf 18 -profile:v baseline -level 3.0 -pix_fmt yuv420p -preset veryslow output.mp4 Here's the input file: ...
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41 views

Cannot access random part of youtube video in firefox

My computer is running on fedora 19 with gnash install (installing adobe flash is not an option for me since it's proprietary.), as well as Firefox. Actually I can watch many YouTube videos using ...
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231 views

Merging audio and video files of different length using mp4box

I have to merge video and audio file together. Currently I am using this command mp4box -flat -add <video> -add <audio> <outputfile>.mp4 But the problem is, if the video is of say ...
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370 views

How to save udp stream to .ts files whith ffmpeg while keeping timestamp?

I need to record a live udp stream containing multiple TV programs ( up to 30 ) to .ts files .To do so i'm using FFMPEG . I have a muxer at work , but i dont go there everyday so im using a sample ...
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131 views

Ffmpeg not copying location metadata

I'm converting vidoes and even though I"m using -map_metadata 0 ffmpeg -i input.mp4 -map_metadata 0 output.mp4 The above code defaults to libx264/libvo_aacenc. The location metadata is not copied, ...
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207 views

MPC-HC + AC3filter playing too fast with DTS-HD MA

Video plays too fast, as if fast forward was enabled. It used to happen with VFR MKV video, and was fixed with View > Render Settings > Presentation > Enable Frame Time Correction. This week this ...
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95 views

Manually add video file to Chrome cache

This might be a bit of an odd question considering most people want to do the opposite (i.e, save a video file to disk from cache), but I'm using CyTube (http://cytu.be/) to simulwatch shows with my ...
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214 views

How to disable widescreen video in Skype?

Since the latest (forced) update, Skype insists on displaying my video in widescreen (16:9) format. The problem with this is that it has a lower vertical resolution: in the old 4:3 mode, the video ...
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647 views

FFmpeg Upscaling Video

First I just want to say a bit more about my title, I am not referring to the fact that upscaling doesnt add data(as often asked when upscaling) - but something different. Example I have raw video ...
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39 views

DVD presence not detected until after Windows Update

I am running Windows 7 with Power DVD. I had a couple of DVDs and I googled to find that The Dark Knight Rises is particularly a frequent evidence the issue. When I insert the DVD into the drive, ...
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68 views

Is there multiple types of transitions in ffmpeg while merging two or more videos?

I have 3 video files. I am using ffmpeg library to merge them all. While merging them right now I am using fade In/Out transitions only. I want to enhance that feature in my site, can I do ...
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179 views

Terrible buzzing/screeching sound and frozen keyboard after playing video

I have a 3 year old PC laptop, and recently the following started to happen: When I'm watching videos online or from the hard drive, my computer freezes and makes this very unpleasant ...
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141 views

Is it possible to replace the video card in IBM Lenevo thinkpad w510

I have IBM Think PAD w510. When i turn on thwn i get 1 long beep and 2 short beeps with no display ...
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49 views

How can I select the most “steady” frames from a video with ffmpeg, where less motion occurs?

I would like to use ffmpeg to select out frames from a video to make a preview picture. In the past I selected out frames manually: I extracted 1000 frames at equidistant time and then I picked out ...
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149 views

How to check .mp4 file is corrupted or not.

I am recording two different videos in the .mp4 format using ffmpeg command and after that combining them. But sometimes one of the video is get corrupted because of that it will affecting on the ...
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521 views

Embed a Non-YouTube video in PowerPoint 2013

How can I embed a video from cnbc.com or foxnews.com in a PowerPoint 2013 presentation? I am aware of how to embed a YouTube video in PowerPoint 2013, but when I try to embed a video from any other ...
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170 views

Upscale any video-size while concatting multiple videos in ffmpeg

I already asked this question at Stack-Overflow, but they said I should post it here, so here it is: I looked for 2 hours through the documentation, but I couldn't figure it out. I currently write a ...
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746 views

ffmpeg - complex filter putting 2 videos side by side results in audio out of sync

We have 2 videos. One is a professionally produced video by an artist that performs a song stopping in certain parts to let the user sing. The second video is a stream that is recorded while the user ...