Questions tagged [video]
Questions about video editing, streaming, conversion, capturing or video output. Use a more specific tag if possible.
552
questions
104
votes
4
answers
30k
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/...
- 23.9k
47
votes
2
answers
51k
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 ...
- 521
594
votes
9
answers
819k
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 ...
- 6,069
23
votes
14
answers
79k
views
Use Flash Player after 12 Jan 2021
I would like to use Flash Player to show web contents but since today (12 Jan 2021) Adobe is blocking it.
Is there a way to use it?
I've tried Firefox, Chrome, Safari and Brave browsers.
- 455
44
votes
7
answers
64k
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 ...
user342545
12
votes
2
answers
16k
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 ...
308
votes
16
answers
210k
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 ...
- 4,349
73
votes
6
answers
141k
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) ...
- 5,654
34
votes
4
answers
30k
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, ...
- 1,055
57
votes
1
answer
49k
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.
...
- 2,714
45
votes
4
answers
40k
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 ...
- 1,820
16
votes
5
answers
12k
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 "...
- 1,944
14
votes
4
answers
137k
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 ...
- 1,584
14
votes
7
answers
63k
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?
- 3,959
5
votes
7
answers
250k
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 ...
- 357
4
votes
1
answer
2k
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 ...
- 23.9k
2
votes
4
answers
4k
views
Linux: How to list all video files with exactly 720p resolution?
I have several video files with different resolutions. Now I want to list only the video filenames with e.g. 720p resolution. I prefer one liners on the bash command line and I can receive helpful ...
0
votes
3
answers
3k
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 ...
- 465
87
votes
8
answers
46k
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 ...
- 3,866
78
votes
1
answer
126k
views
Add audio to video using FFmpeg
I’m trying to add sound to a video using FFmpeg, but for some reason, when I play the resulting file, it doesn't have any sound. I also tried doing it with an aac audio file, as well as leaving out -...
- 1,640
72
votes
7
answers
125k
views
What is the correct way to fix keyframes in FFmpeg for DASH?
When conditioning a stream for DASH playback, random access points must be at the exact same source stream time in all streams. The usual way to do this is to force a fixed frame rate and fixed GOP ...
- 1,679
56
votes
8
answers
216k
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 ...
- 3,089
33
votes
5
answers
52k
views
Change framerate in ffmpeg without reencoding
I have a mkv (h264) video that is 23.976 fps (24000/1001) but I want to convert it to 25fps without reencoding and loosing quality.
I know mkvmerge can do it ( with option --default-duration '0:25fps')...
- 445
27
votes
3
answers
47k
views
FFMPEG / libx264: How to specify a variable frame rate but with a maximum?
Instead of providing a fixed frame rate to FFMPEG/libx264 (-r/-framerate), I would like to specify a variable frame rate with a MAXIMUM value, and allow libx264 to down the frame rate as it sees fit. ...
- 1,679
27
votes
11
answers
98k
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 ...
- 12k
11
votes
1
answer
12k
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:
...
- 255
10
votes
7
answers
30k
views
How to keep VLC player in minimized mode?
I'm using VLC media player which can play almost all kinds of audio and video formats. While listening to audio, I keep VLC in minimized mode and can work on other windows. But when I select to listen ...
- 811
7
votes
1
answer
4k
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 ...
- 431
4
votes
1
answer
12k
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 ...
- 4,027
2
votes
7
answers
931
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 ...
- 87
160
votes
6
answers
246k
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 ...
- 9,386
77
votes
3
answers
93k
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 ...
- 1,265
52
votes
6
answers
339k
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?
- 765
40
votes
3
answers
53k
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 -...
user995074
10
votes
4
answers
36k
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?
- 6,706
7
votes
2
answers
5k
views
Reduce video frame rate without dropping useful frames
I have a video from a security camera that was originally recorded at a low frame rate, maybe 15 fps, maybe 10 fps, maybe even less. It has since been converted by someone else to 25 fps (without ...
- 1,166
5
votes
2
answers
14k
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 ...
- 51
5
votes
2
answers
7k
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 ...
- 151
5
votes
1
answer
2k
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, ...
- 205
2
votes
1
answer
12k
views
ffmpeg settings for converting still images to video for archival
I need to convert a set of still images (static cameras pointed at a road) to a video.
I have considered video codecs such as Theora, H.264, VP8, VP9, HEVC, Snow.
The video should have a minimum ...
2
votes
2
answers
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?
Ben
1
vote
1
answer
12k
views
Convert ffmpeg encoding from libx264 to h264_nvenc
The video hosting website LBRY suggests users try the following command to compress their uploads:
ffmpeg -i input.avi -c:v libx264 -crf 21 -preset faster -pix_fmt yuv420p -maxrate 5000K -bufsize ...
- 4,758
113
votes
8
answers
246k
views
How to extract one frame of a video every N seconds to an image?
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 ...
- 3,060
45
votes
7
answers
351k
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 ...
- 39.6k
44
votes
5
answers
67k
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) ...
- 861
41
votes
2
answers
94k
views
Repairing corrupt MP4
I took a video from my Android phone (Sony Xperia P, if you need to know), and before I could stop recording it, the phone memory got full and the phone got hanged too. I rebooted the phone, the video ...
- 1,305
33
votes
3
answers
24k
views
Is it possible to speed up video with audio using ffmpeg, without changing audio pitch?
Is there a relatively simple way to speed up a video (mp4, with aac encoded audio), by say "x1.25" or "x1.3" while keeping the original audio-video sync, but also retaining the original pitch of the ...
- 639
26
votes
7
answers
53k
views
How can I repair a broken AVI file?
I have an .avi file that is about 110mb. When I try to play it with VLC Media Player it says something like "This file is broken. Attempt to repair?" and after it does its thing it is still unable to ...
- 3,089
25
votes
3
answers
28k
views
Change rotation flag in MP4 video (without losing metadata)
I just want to change the rotation flag in a .mp4 video file.
Many similar questions exist, most answers suggest using
ffmpeg -i input.mp4 -map_metadata 0 -metadata:s:v rotate=90 -codec copy output....
- 969
24
votes
1
answer
29k
views
FFmpeg split video and merge back
I'm trying to use FFmpeg to split video based on some start_time and end_time inputs, and replace those with other video files. For instance, for input 10 15 I will need to replace EXACT seconds 10 to ...
user608414