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

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0answers
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 ...
1
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1answer
18 views

Merging two audio streams from within a Transport Stream in ffmpeg

I have an M2TS file which consists of the following: Stream #0:0[0xc9]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 704x576 [SAR 16:11 DAR 16:9], max. 15000 kb/s, 25 fps, 25 tbr, ...
0
votes
1answer
38 views

ffmpeg no cutting accurately

I have a Python script that shows the chapters of an M4V video and gives the user the option to extract this chapters. The problem is that ffmpeg is not cutting accurately. It cuts a little before ...
0
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0answers
18 views

How do I pause and cancel a dailymotion download that is going on using a firefox add-on?

I've just a little while ago installed a Mozilla Firefox add-on for downloading videos from the Dailymotion.Com, but inadvertently I've ended up clicking the "Download" button for a single video ...
0
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1answer
26 views

How to change the default folder that opens when I add subtitles in VLC mediaplayer?

Whenever I click on the add subtitles option, it always opens up in C drive. The file that I require is buried deep inside another drive and I do not wish to move them from there. Can I change the ...
-1
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0answers
14 views

Twin video card monitor selection

I currently have a Radeon 6870 graphics card. I am running four monitors, therefore all the ports are currently in use. If I purchase another video card and connect one or more monitors to it, will ...
1
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1answer
56 views

Why are h264/ac3/mkv videos showing up as “motion jpeg” with ffmpeg?

I use xmedia recode, which uses ffmpeg, to convert these videos using "copy" video and "convert" ac3 -> aac, with an mp4 container. For most videos this works fine, and is really fast. However some ...
1
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0answers
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 ...
1
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1answer
34 views

Converting OpenOffice Impress presentation to video without screen recording

how can I convert OO Impress presentation to video without setting up screen recording? The goal is to have a server that produces a MPEG stream with the presentation. I want to avoid screen recording ...
0
votes
1answer
36 views

Clipped video using ffmpeg is shorter than expected

I'm trying to get a clip of length 6 secs from a MP4 video (size: 1.44 GB, length: 02:23:38). But video stream stops after 1 sec, while audio stream keeps playing normally until 6 secs. I'm using ...
0
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0answers
23 views

What all factors affect the ability of a video player to play a particular file?

I am trying to determine what all factors decide whether a file can be played by a particular video player, such as software or dvd player or TV with usb function or any media player. Are there other ...
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0answers
22 views

Stream video from Mac to OPPO BD player

I used to stream video from my PC to my OPPO BDP-103 player without any problem (I just go to "Network" on my OPPO and find the PC and the shared folder). Now I have a Mac as my main computer and I ...
2
votes
1answer
33 views

ffmpeg stream copy frame accuracy

I know this might not be possible, but I'd at least appreciate understanding what's going on. I have a video with forced keyframes every 2 seconds. Ideally, I was hoping I'd be able to get ...
1
vote
2answers
193 views

Why is VLC slower than MPV/MPlayer?

Every time I try to seek a local video with VLC, there is a noticable lag, as opposed to MPlayer/MPV, no matter what "ultrafast" x264 presets or loop filter skipping is used. What's the fundamental ...
0
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1answer
75 views

How does VLC play youtube videos?

How does VLC open and play youtube videos? If you press Ctrl+N and enter the url of a youtube video, it loads for a few seconds and then plays the video. How does it parse the HTML code?
1
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0answers
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 ...
0
votes
1answer
75 views

How to cut unwanted video parts and join the rest ones into one video using FFmpeg?

I have read about cutting and splicing using concat but this is not enough for me. I would like to cut marked video parts and join into single video file without re-encoding. Is it possible to cut ...
0
votes
1answer
17 views

ffmpeg - define exact time distance for images

I have a movie that is 3 minutes long and 29 image/sec. I want to split it into images by 1/second. I use this command: ffmpeg.exe -i FILE0014.MOV -r 2 -f image2 -vcodec mjpeg -qscale 2 "%%05d.jpg" ...
0
votes
1answer
26 views

Repair missing keyframes in downloaded video stream

I downloaded a video using ffmpeg with the following characteristics: Input #0, mpegts, from 'video.ts': Duration: 00:27:59.76, start: 1.400000, bitrate: 714 kb/s Program 1 Metadata: ...
0
votes
1answer
43 views

Find video duration after applying slow motion

I'm trying to have apply slow motion effect to a series of videos. And further those videos will be scaled, padded and cross-faded. Following is the command I'm using to apply slow motion. ffmpeg -i ...
0
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0answers
22 views

avisynth - video framerate doesn't match (AssumeFPS - ChangeFPS)

I am trying to speed up only certain frames in a video without splitting it into several parts, here is the code that I used to do this AVISource("C:\Users\me\Desktop\source_10FPS.avi") # get the ...
0
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0answers
36 views

Why does delaying audio in avi makes no sense?

I have an avi video which seem to have an audio delay of about 5.5 seconds. Therefore I used avconv to correct for this delay: avconv -i myfile.avi -itsoffset 5.5 -i myfile.avi -map 0:1 -map 1:0 ...
0
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0answers
63 views

How to fix a .mov file in hex editor from Photo Booth crash on OS X?

I was recording a ~4GB video using Photo Booth on OS X. The program terminated for some reason (unsure of whether it was computer sleep or something else). I have a corrupted file of about 4GB in ...
1
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0answers
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 ...
1
vote
1answer
46 views

How do I force GRUB to keep video mode after switching to the OS?

I use GRUB as a bootloader for my custom OS. I want it to enter graphics mode for me so I don’t have to do it myself in my system. However, before GRUB passes the control to the OS, video mode is ...
0
votes
1answer
39 views

Every video starts with black and messy screen in a while

When I start a video on my laptop it is messy in the first 4-5 seconds. It does not depend on where I play it, everywhere I get the same problem. The problem looks like this: I have a Toshiba ...
1
vote
1answer
60 views

Upscaling video with different filter on each side

I need scale up video from one DOS game using FFmpeg. But with Nearest-neighbor interpolation on left side and xBR filter on the other one. Input (320x200) Output (1280x800) Here is a command, ...
0
votes
0answers
22 views

ffmpeg, how to add new audio (mixing) in video [duplicate]

I want to add an audio file in video. The resultant video contain both the audios, first contain by video it self and second from audio file. Basically mix both the audios. Final video have two ...
0
votes
1answer
48 views

Muxing Audio Over Video Using Ffmpeg

So i have been through lots of tests and i still cannot seem to get audio to mux over video using ffmpeg and cannot figure where i am going wrong so would really appreciate some help. I have this ...
0
votes
0answers
20 views

How do I correct a video that is partially out of sync with its audio?

I recently recorded an MP4 video in which the audio is in sync for the first couple of minutes, but then abruptly falls out of sync for the remainder of the video. How can I fix the out-of-sync audio ...
0
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0answers
17 views

How can I batch convert all of my video files to AAC audio without converting the video?

I've used XMedia Recode to do this and it works great. I set video to "copy", audio to "convert", and it takes 2 minutes for a 2GB file. There's two problems with it for batch work though. It doesn't ...
3
votes
1answer
85 views

youtube-dl : Downloading a youtube user's complete video collection

Previously, whenever I had to download a user's complete videos, I'd just use something like: youtube-dl -ciw ytuser:LinusTechTips But now this does not seem to work anymore. When I issue this ...
0
votes
1answer
34 views

Batch convert video files for upload to Flickr

I have hundreds of home video files in various formats (AVI, MP4, MOV, etc) in sub-folders in a \My Photos folder on my Windows 7 PC. I would like to upload all of these to my Flickr account. But ...
1
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0answers
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 ...
1
vote
1answer
106 views

Play mp4 video in Internet Explorer 11 with security level set to high

I am using the html5 tag to embed mp4 videos on a site. They play well in all browsers except on IE-11 but only when the security level is set to high (if security level downgrade to medium video ...
3
votes
1answer
78 views

FFMPEG filter to boxblur and greyscale a video using alpha mask

Can someone show me how to enhance the example found here: FFmpeg - Apply blur over face To do the following: Use an input alpha mask PNG instead of a declared rectangular region both blur and ...
0
votes
0answers
20 views

Blur or hide screen portion during realtime presentation

I am about to present my project tomorrow. Demonstrating the project involves showing account name to certain game, as my project manipulates that games launcher. Basically, I am about to present what ...
6
votes
2answers
842 views

YouTube videos black, only audio in Firefox

When I play a YouTube video on my computer, it seems to play fine, but the whole video is black. This happens only when I play the video in Firefox. I'm using Windows 8.1 What I did so far: ...
1
vote
2answers
48 views

ffmpeg wants to overwrite existing images

I want to make a timelapse movie with ffmpeg. For now I use mencoder with following command: mencoder mf://*.jpg -mf fps=12 -nosound -noskip -ovc copy -o Zeitraffer$begin.avi I'm trying to make a ...
1
vote
1answer
129 views

What do I need for VLC to play mp4 video?

I'm trying to set up a Raspberry Pi as a media box that can stream from torrents using Peerflix. To test, I've set up a local tracker and one torrent containing an mp4 video. Peerflix is working ...
2
votes
0answers
24 views

Any empirical length limits or caveats about MP4's of 7400 seconds?

I was investigating a curious issue I have with the playback of certain MP4 files on my BluRay player; in particular, it seemed files over two hours simply would not play (player locked up). As I ...
0
votes
1answer
45 views

Skip parts of video while converting it to images with ffmpeg

I use this command on ffmpeg to convert a video into images: ffmpeg -i video.mp4 -q:v 1 -r 1 -f image2 frame-03d%.jpg What I want to do is to skip the first x seconds and the last y seconds of the ...
1
vote
1answer
81 views

Problems with joining videos in FFmpeg with a cross-fade effect (buffer queue overflow, frames dropped)

I can successfully join a couple of videos into one (using this method) with a nice cross-fade effect in between, but the output video contains no audio. I'm using the -filter_complex command. I've ...
0
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0answers
32 views

Video Codec Problems

I have been having a problem with a file with the PRDY and undf video codecs. Is there any way to open them? thanks Brett 2010 iMac VLC version 2.2.1
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votes
0answers
44 views

Issues streaming movies with VLC from my debian server

I am trying to stream movies from my linux server that I connect to via SSH. I go to VLC and networking and I use SFTP to get to my server and my file. ...
0
votes
1answer
53 views

FFmpeg – Keep original video orientation

I'm converting 3gp video to mp4 format and that is working. But I have one issue: original video orientation is not kept. I know about rotate, flip and other commands, but I'm converting video ...
0
votes
0answers
73 views

FFmpeg - Transcode video and keep original EXIF metadata in the transcoded file?

I am trying to transcode a video from a .mov (recorded with the iPhone) and add the original metadata (EXIF) to transcoded file, how can I achieve that? The original video contains EXIF metadata, etc. ...
0
votes
0answers
29 views

Enabling fullscreen on videos goes to secondary monitor

For some reason when I try to go fullscreen while watching videos (HTML5 and Flash), it always initially goes fullscreen on my secondary monitor. When I undo the fullscreen and move the monitor back ...
0
votes
1answer
88 views

How to preselect audio tracks in VLC when the language name is not in the track name?

I have a number of videos that have been provided to me in multiple languages. Unfortunately the first track is in Spanish and the second track is in English. These audio tracks simply named Track 1 ...
0
votes
1answer
3k views

YouTube video turns black after few seconds

I am trying to watch YouTube videos, but after a few seconds the video area turns black even though it keeps on playing. Any tips why? I use latest Chrome on Windows 7, and a Lenovo Thinkpad.