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Questions tagged [video]

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

92
votes
4answers
23k views

What is a Codec (e.g. DivX?), and how does it differ from a File Format (e.g. MPG)?

I'm so confused... what is the difference between an audio/video codec (which apparently is a shorthand for "encoder/decoder", kind of like how "modem" is really "modulator/demodulator") and an audio/...
25
votes
2answers
25k views

Create video with 5 images with fadeIn/out effect in ffmpeg

With 5 images I have to create a video of 60 seconds in ffmpeg, each image has to display for 15 seconds. after 15 seconds, first image has to fade out and 2nd image has to fade in, after that 2nd ...
305
votes
6answers
376k views

Using ffmpeg to cut up video

I am using ffmpeg to cut out a section of a large file like this: ffmpeg -i input.wmv -ss 60 -t 60 -acodec copy -vcodec copy output.wmv The -ss part works fine but the -t is ignored. It correctly ...
12
votes
2answers
14k views

What parameters should I be looking at to reduce the size of a .MOV file?

My Canon 60D creates .MOV files when recording video and I've found out that the .MOV container has an H264 video stream and a PCM audio stream. I've used ffmpeg and GSpot to look at some of my ...
25
votes
3answers
28k views

crossfade between 2 videos using ffmpeg

I've been trying to achieve a crossfade transition between 2 video clips using ffmpeg but have failed so far. I'm new to ffmpeg and am mostly relying on tweaking what I can find in the documentation ...
174
votes
10answers
68k views

Combine one image + one audio file to make one video using FFmpeg

This should be pretty trivial, but I can't find a way to get it to work. I want FFmpeg to take one JPEG image and an audio file as input and generate a video file of the same duration as the audio ...
13
votes
7answers
59k views

What subtitle file editor for '.srt' files supports synchronization? [closed]

I downloaded .srt files for watching a French movie. But unfortunately, it is out of sync. Is there any tool in Windows using which I could manually sync it specifying the start time?
10
votes
4answers
8k views

Automatically split large .mov video files into smaller files at black frames (scene changes)?

I have 65 .mov video files named tape_01.mov, tape_02.mov, ..., tape_65.mov. Each is about 2.5 hours long and takes up many gigabytes. They are digital copies of what were VHS tapes (my family's "...
10
votes
4answers
98k views

Calibrate two monitors to the same video settings

Background: Just started a new job as a software developer for an amazing company. I have at my workstation two beautiful 22” LCD monitors. It just happens, however, that the laptop port replicators ...
5
votes
7answers
249k views

What format is “undf”?

By accident, I recently removed some videos from my phone. I tried to restoring them with Recuva and TuneUp Utilities and the results were "undf" files. I tried to open with VLC, Media Player Classic ...
0
votes
3answers
2k views

Convert video into format which is most likely playable on a windows system

I have some flv and mp4 videos, which I need to convert to a format which is playable on an a Windows Vista system (for a presentation). The problem is, that I cannot test the videos on the system on ...
50
votes
8answers
198k views

How can I merge two mp4 files without losing quality?

I have two high-quality mp4 files, which are of two parts of the same show. I want to merge them together into 1 file, and I usually use VirtualDub to merge my files... But it doesn't seem to support ...
86
votes
7answers
40k views

What are the differences of watching a 1080p and a 720p version of the same media on a 720p screen?

Say I have 1280x720 pixels on my screen and the current resolution is set to 1280x720 as well. What are the differences between the 1080p version and the 720p version of the same media? Is it ...
78
votes
6answers
114k views

How to retrieve video file information from command line under Linux?

I'd like to see from command line all informations pertaining to a given video file, including length, quality, bitrate, resolution, audio and video formats, number and language of audio streams and ...
21
votes
3answers
15k views

Accurately cut video files from command line

I'm having trouble finding a cli application that can take a video file (avi, mkv, and mp4 preferably) and cut out very short clips (2-6 seconds) with precision time accuracy. I've tried ffmpeg, ...
20
votes
2answers
14k views

FFmpeg - Apply blur over face

I'm trying to blur a portion of a video using FFmpeg (specifically to blur a face). I have been trying to use a combination of timeline editing and the various bluring filters, but I cannot find a ...
6
votes
1answer
5k views

ffmpeg: smooth zoompan with no jiggle

I'm trying to create a basic 5 second zoompan to the center of an image (from the example on the ffmpeg.org website). The command below works, but jitters more than my hands after 5 cups of coffee: ...
4
votes
1answer
9k views

How to soft code an MKV with subtitles?

I have an avi and corresponding .srt file for subtitles. I hate having two files for this movie, so what I want to do is convert this file to mkv as I heard it can hold subtitles. I have handbrake ...
5
votes
1answer
2k views

Is it possible to RDP into Windows Server 2008 on a machine without any video card or integrated graphics?

Basically, I plan to install Windows Server 2008 R2 x64 on a machine by plugging in the video card initially and then I plan to remove it completely because I need the slot for something else. The ...
2
votes
7answers
901 views

Free video converter software for Mac? [closed]

I'm using Mac OS X 10.5 and am looking for a free video converter software which supports mp4, avi, and wmv files (and perhaps rmvb, too). I want to convert avi, wmv, and rmvb files to mp4 to be able ...
55
votes
6answers
104k views

How to open and repair an m4v or mp4 video file?

Yesterday I was filming a scene with my phone but suddenly the application crashed and when I try to open the m4v generated it says that is corrupted. I have downloaded the video files (around 36MB) ...
51
votes
6answers
332k views

How do I rotate video (MOV) file on Windows?

I recorded a video (on iPhone) in portrait mode. Now I need to rotate it. Right now I have a MOV file. I'm using Windows. What program can I use to rotate and save this video without losing quality?
25
votes
11answers
90k views

How do I convert an animated GIF to a YouTube friendly video format?

My son has made some animations with Pivot Stickfigure Animator which we'd like to upload to YouTube. The problem is Pivot saves as animated GIFs which I can't upload to YouTube. The Wikipedia ...
10
votes
4answers
30k views

How can I download a Flash video from a website?

I am trying to download a Flash video, so I can try to convert it to a normal DVD. (FYI: this is a religious video.) Is it possible to download this video? If so, how could I do this?
4
votes
1answer
1k 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, ...
2
votes
2answers
2k views

How to convert SWF to uncompressed AVI?

Can someone explain how to convert .SWF files to uncompressed .AVI files. Which software I'd need or a tutorial I could use?
0
votes
1answer
202 views

ffmpeg is not even cutting this and other mp4s to the nearest second [duplicate]

I have a file Other - Analogue Clock-JEJqy1Wlovw.mp4 which is just a download from https://www.youtube.com/watch?v=JEJqy1Wlovw It's 2 minutes 13 seconds long. I had some issues cutting it to the ...
45
votes
7answers
330k views

How to find the stream behind a Flash player

I am watching a Flash stream. I can watch the same stream in two different players (set up by someone else), but I don't like any of them. Is there a way I can find/get/extract the direct link to the ...
30
votes
3answers
32k views

How to create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG

How can I create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG? I used this command to convert an input.avi file to a series of PNG frames: ffmpeg -y -i input.avi -an -...
38
votes
5answers
57k views

Joining H264 *without* re-encoding

I have two halves of a single show in two .MP4 files, encoded in H264. I would like to join them without re-encoding. Is this possible? I managed to create a joined video as a Quicktime file (.mov) ...
19
votes
3answers
45k views

Windows 7 Webcam recording software [closed]

I want to record a video on my webcam on Lenovo T61 powered by Windows 7 Professional. I've noticed it's working differently from Windows XP. Can anyone care to recommend a decent webcam software that ...
19
votes
10answers
134k views

Force native resolution to Non-PnP monitor in Windows

I've got a 22-inch, 1680 x 1050 monitor. Brand X2gen, model MW22U. Connected by DVI cable to my NVIDIA GeForce 9600 GT graphics card. Several days ago my monitor stopped working. It displayed ...
28
votes
1answer
17k views

Why can't Quicktime play a movie file encoded by FFmpeg? [duplicate]

When I try to open a movie I just created with the command: ffmpeg -pattern_type glob -i '*.JPG' -s 640x480 movie.mp4 I get an error from QuickTime: The document “movie.mp4” could not be opened. ...
11
votes
6answers
37k views

Secure video chat program as an alternative to Skype [closed]

I'm looking for something similar to skype but basically just for me to video chat with my girlfriend. Skype has been kind of buggy lately with its recent iterations and doesn't seem to be progressing ...
11
votes
6answers
96k views

Tool to fix video that's out of sync with audio?

I'm looking for (preferably free) software for Windows 7 that will allow me to fix an AVI file that has audio out of sync with the video. I tried with Windows Live Movie Maker and VirtualDub and ...
12
votes
3answers
8k views

Disable thumbnails in Windows XP?

Background I regularly use Windows Explorer to browse my drives and data, and I notice little freezes and hiccups at times. It's especially noticeable when browsing local or network folders with lots ...
5
votes
7answers
4k views

high pitched whine from newly built PC

I've just built a new PC: Asus P6T Deluxe v2 motherboard i7 920 Sapphire HD 4670 Passive heatsink Corsair 620hx portal supply Antec P183 case Sometimes when I turn it on, there is a high pitched "...
4
votes
2answers
3k views

Limit video output to a section of a display and leave the rest blank

The video projector I have to use this week projects an image too large for its screen and spills over on every side. Fixing the physical setup is not possible or at least unlikely for the moment: ...
4
votes
2answers
534 views

Windows freeware/opensource video editor [closed]

I've googled and googled and googled, but I can't find a decent FREE windows video editor. Does anybody know one?
6
votes
2answers
12k views

Convert old videos to have smaller sizes

I have some videos from a few years ago,with various formats, such as avi, mpg, wmv, rm, rmvb, .... Their sizes are huge(more than 500 MB, and sometimes > 1GB). Given there may likely be some advance ...
3
votes
1answer
2k views

Ffmpeg add new audio in video (mixing 2 audio)

I want to add an audio to video at specific duration. Now before/after that intended duration, original audio of the video should be playing; and at the intended duration only inserted audio should ...
3
votes
1answer
3k views

Encode HD video to a good format for editing

I have a video that I would like to edit, but it's currently a mov (H.264) file, which makes frame by frame editing impossible. So, I'd like to re-encode it to a better format. I read that DV is a ...
10
votes
1answer
2k views

Is it possible to power off a PCIe video card/slot? (eg. hot-plug)

I'm looking at building a system that supports VT-d so I can pass through a high powered loud video card to a Xen/KVM/whatever VM (host will be Linux based). However, when I'm not using the VM I want ...
4
votes
1answer
76k views

How to remove title and other metadata from video files? [duplicate]

I have problem sorting videos in VLC because it is using the metadata title to sort them, but they all have the same title. Which is why I want to remove all metadata, especially titles. How can I ...
4
votes
1answer
2k views

iPhone recorded videos getting rotated on Windows systems

I am recording videos on iPhone and uploading them to my Linux server. Users can see these videos on website. If users are seeing videos on mac or iDevices the video is looking fine but when users are ...
3
votes
1answer
5k views

Use later frame for video thumbnail in Windows 7

I've got a collection of videos and most of the thumbnails generated are useless as they are of a frame very early on, in most cases the title sequence. Is there any registry setting or something to ...
2
votes
2answers
3k views

How to get width of the video and scale another video to that width using ffmpeg?

I'm using ffmpeg to stack two videos vertically. They might be different size so I need to scale them to same size. I have found following commands. First one works for different sizes (but won't ...
2
votes
3answers
1k views

What do I need to be able to convert analog video (VHS, or an old camcorder) on a Mac?

I have a number of old VHS tapes, as well as some analog 8mm tapes. I still have a working VCR, as well as the camcorder that recorded the tapes. I'd like to convert these on a Mac (MacBook Pro) - ...
1
vote
1answer
6k views

How to sync two looping videos with mplayer and upd?

I am trying to sync two instances of mplayer with -upd-master and -udp-slave, and notice that the slave staggers for about a second when the master begins the loop anew. I am running debian 7.1 with ...
1
vote
3answers
272 views

Live Video on website, conferencing

A friend of mine, an author, wants to do on-line book readings. We have a very simple setup and would like to stream live Video through her web site. Her client PC runs on Windows XP, has a standard ...