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

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74
votes
6answers
17k 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 ...
72
votes
5answers
87k 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 ...
61
votes
4answers
12k 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 ...
52
votes
6answers
56k views

Can HandBrake flip/rotate a video?

I'd like to use HandBrake to compress some video that was taken via a camera that was mounted upside down. I found a reference to a command-line rotate option, but I can't find it in the GUI. Am I ...
51
votes
1answer
22k views

Why is YouTube buffering/loading behavior so horrible in Chrome?

I have been suffering from this for months, possibly even years, and I still don't have the slightest clue about the cause. Let's say I open a video on YouTube in Chrome, like Jamie Hyneman's ...
48
votes
4answers
17k views

What is the difference between 1080p, 1080P and 1080i?

Many times, I have seen resolution of 1080p and I know that it means 1080 pixels but I also have seen specifications on some HDTVs to be 1080i. So, I want to know the exact difference between them and ...
45
votes
6answers
239k 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?
42
votes
16answers
82k views

How can I combine 30,000 images into a timelapse movie?

I have taken 30,000 still images that I want to combine into a timelapse movie. I have tried QuickTime Pro, TimeLapse 3, and Windows Movie Maker, but with such a huge amount of images, each of the ...
35
votes
8answers
136k 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 ...
34
votes
13answers
49k views

In Google Chrome on Linux, where is the flv if not in /tmp?

I like to keep videos because I like buffering them and then playing them back-to-back in my media player, I want to be able to stop/restart my browser without losing all the buffered video, and ...
27
votes
4answers
38k 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) ...
27
votes
8answers
151k 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 ...
26
votes
1answer
18k views

FFMPEG Splitting MP4 with Same Quality

I have one large MP4 file. I am attempting to split it into smaller files. ffmpeg -i largefile.mp4 -sameq -ss 00:00:00 -t 00:50:00 smallfile.mp4 I thought using -sameq would keep the same quality ...
23
votes
1answer
636 views

Why is vertical resolution a multiple of 360?

YouTube recently added 1440p functionality, and for the first time I realized that all (most?) vertical resolutions are multiples of 360. Is this just because the smallest common resolution is ...
22
votes
7answers
13k views

How can I disable HTML5 content in popular browsers like Firefox and Chrome?

The bad thing about Flash video was that it required a third-party plugin to play the content. The good thing was I could select which content to play; using the click-to-play feature in Firefox and ...
21
votes
8answers
43k views

How to convert video to images?

How can I convert a video file to a sequence of images, for example one frame every N seconds. Can mplayer or ffmpeg do this? I have used MPlayer to grab screenshots manually but I would like to ...
19
votes
10answers
73k 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 ...
19
votes
4answers
8k views

Creating video with audio and still image for YouTube

I'm running the following command: ffmpeg -i audio.mp3 -ar 44100 -f image2 -i logo.jpg -r 15 -b 1800 -s 640x480 foo.mov Which successfully outputs a video with my recorded audio and an image on it. ...
18
votes
4answers
84k views

Is there an equalizer for windows that works regardles of audio/video player [closed]

I'm tired of having to tweak the audio on every media application I have installed. Is there an app that will sit between any media application and my sound-card so that I can set audio levels and ...
17
votes
4answers
35k 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) ...
16
votes
10answers
69k 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 ...
16
votes
9answers
43k views

How can I organize movies, with IMDB import and fields for tags? [closed]

How can I organize movies on Windows? Features wanted: IMDB import fields: director, genre, year, actors,... covers manage DVD / BD / ripped AVIs, MKV moving/renaming files according fields I ...
16
votes
4answers
3k views

Concatenating ogg video files from the command line

Okay. I've got a few ogg files I've created using a desktop recording tool. I've transcoded them using ffmpeg once (mainly to clip out the beginnings and the ends). Now, I have 3 such files which I ...
15
votes
3answers
10k views

Resize videos with different widths to a fixed height preserving aspect ratio with ffmpeg

I'd like to convert a lot of video files to flash video for our company's website. I have a requirement that all of the videos must be in 360p format, so their size would be Nx360. FFMpeg uses -s ...
14
votes
3answers
14k 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 ...
14
votes
8answers
78k views

Converting or playing a .264 video file?

I recently bought a Chinese brand DVR (to record security cams). The DVR exports the video files with a ".264" extension. This is my first time ever dealing with this video format. Anyhow I've been ...
14
votes
3answers
55k views

Fullscreen video in Chrome shows URL in corner

When playing a fullscreen video in Chrome, the URL shows in the lower left corner. This happens for YouTube as well as other video players, where sometimes it covers the progress bar. The ...
14
votes
2answers
140k views

Cropping videos in Windows Live Movie Maker

I want to crop (as in, take a subset of each frame, like when you crop a photo) a video in Windows Live Movie maker. Is there a way to do this, and failing that is there another free tool i can use to ...
13
votes
7answers
46k views

Merge AVI-files without recoding in Mac OS X Lion

Is there a (at best free) solution to merge AVI-Files in Mac OS X Lion without the need to recode them? (Until Snow Leopard I used D-Vision 3, which won't run on Lion because it's PPC.)
13
votes
6answers
20k views

How do I get the number of frames in a video on the linux command line?

I have a video file and I want to get the number of video frames that are in it. I can use ffmpeg to get the length of the video and the FPS. However I can't see anything obvious for the total number ...
13
votes
2answers
20k 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 ...
13
votes
4answers
37k views

How to convert an MKV to AVI with minimal loss

To convert an MKV to AVI, I do two things. The first thing I do is this: ffmpeg -i filename.mkv -vcodec copy -acodec copy output.avi or this: ffmpeg -i filename.mkv -sameq -acodec copy output.avi ...
13
votes
2answers
26k views

How to Add/Remove subtitles in an MKV file?

I have a good quality MKV file that has several subtitle options. I want to add an additional subtitle file to the list. Some search online led me to use video converters, and basically re-encode the ...
13
votes
5answers
26k views

How to play 24 fps video smoothly on a 60Hz display?

I use mpc-hc to play videos on Win7 x64. With the default settings (#1), video playback is great most of the time. But for panning shots, playback is not smooth. I stepped through the video frame by ...
13
votes
2answers
6k views

FFMPEG - Non-monotonous DTS

When I use FFMPEG to convert a video from MP4 to M3U8, using the following command, ffmpeg -i op.mp4 -b:v 128k -flags -global_header -map 0:0 -map 0:1 -f segment -segment_time 4 -segment_list_size 0 ...
12
votes
5answers
47k views

How can I monitor video memory usage?

How can I monitor video memory usage?
12
votes
7answers
3k views

A scratched CD cannot be copied, but can be viewed by VLC or jetAudio - how?

I've a badly scratched VCD whose content can't be copied to hard disk. My OS is Windows 7 Ultimate x64. Windows can't copy the 750 MB video file. I also tried CDCheck and Recover Disc. Both of them ...
12
votes
6answers
9k views

How can I convert .mov to mp4?

I have a .mov file I've just recorded that's 600MB, I want to convert it to a smaller .mp4 file. How can I do this?
12
votes
3answers
24k 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 ...
12
votes
7answers
12k views

How can I open VLC multiple times?

In my particular case on a Mac, I would like to dump several parallel Flash video streams. So the question is, how can I run several instances of VLC?
11
votes
5answers
16k views

How can I obtain the bitrate of a video from a command line in Linux?

What is a good command line tool to get the video bitrate of a divx or xvid avi file for linux?
11
votes
3answers
3k views

In video card specs, does “maximum resolution” mean the resolution for EACH monitor?

In video card specs on Nvidia or AMD’s web sites they often list maximum display resolution. If a card has two DVI ports or two DisplayPorts, and has a maximum resolution of 2560×1600, does that mean ...
11
votes
3answers
6k 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 ...
11
votes
2answers
7k views

How to get length of video file from console?

Suppose we have video file some_video. How to get length of it from a shell script (with mplayer/transcode/gstreamer/vlc/ffmpeg/whatever)? VIDEO_LENGTH_IN_SECONDS=`ffmpeg .... -i some_video ... | ...
11
votes
3answers
72k views

How to perfectly synchronize Subtitles with movie?

How to perfectly synchronize Subtitles with movie? i use VLC
11
votes
2answers
757 views

Playing large video files over wireless network. What technical specification should I look for when buying wireless router?

I have a Windows 7 desktop with a folder shared out joined to a wireless network. I regularly use my Android tablet (also joined to the same wireless network) to play video files that ranged from 1GB ...
11
votes
2answers
3k views

Extracting all the still images from a movie [closed]

I have a large number of paper sheets to scan. Instead of an autofeed or flatbed scanner, I'd like to use my photo camera. After a while, it occurred to me that instead of making a photo for each ...
11
votes
1answer
2k 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
2answers
853 views

Windows cannot enter very low-res video mode with modern graphics cards/drivers

NEW! I was trying to post here yesterday, but it kept giving me an error. I have discovered that it actually is not using DirectX at all, but GDI or whatever is the non-DX graphics in Windows (not ...
10
votes
8answers
32k views

Keep Fullscreen Flash/Silverlight Video opened on Monitor 2

Like many of you, I'm working with two monitors. I'm trying to watch an episode on Channel9's vid-cast, but every time I click back onto my other monitor, the video exits fullscreen-mode, and goes ...