Questions tagged [ffmpeg]
FFmpeg is a free software project that produces libraries and programs for handling multimedia data. The most notable parts of FFmpeg are libavcodec, an audio/video codec library used by several other projects, libavformat, an audio/video container mux and demux library, and the ffmpeg command line program for transcoding multimedia files.
1,812
questions
297
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How can I crop a video with ffmpeg?
I have an MP4 file of a screen recording that I need to crop down. How can I accomplish this without using expensive tools like Adobe Premier or Final Cut? I prefer ffmpeg because I have used it ...
83
votes
5answers
186k views
Repeat/loop Input Video with ffmpeg?
I just want to loop a mp4 video with ffmpeg and keep the current settings and codec.
For example if input.mp4 is 0:10 long, and I would want to loop it 4 times so output.mp4 is 0:40 long, how could I ...
61
votes
2answers
121k views
Add an image overlay in front of video using ffmpeg
I have many videos and I need to put an image in front of them for about 5 seconds, but adding it manually and rendering it each time would take really long, so I am asking if it is possible to do so ...
41
votes
1answer
40k views
Can I use FFmpeg in a commercial product? [closed]
Not sure if I am correct posting my question here and I will of course delete this question if appropriate.
I have a C# desktop app using FFmpeg.
I have a web service using FFmpeg.
I sell both ...
36
votes
6answers
50k views
How to get FFMPEG to join non-sequential image files? (skip by 3s)
I have a bunch of images, that follow this pattern.
0001.png
0004.png
0007.png
0010.png
0013.png
0016.png
0019.png
...
They're in the correct order, but FFMPEG ignores anything after the first file, ...
35
votes
3answers
59k views
ffmpeg Color Correction: Gamma, Brightness and Saturation
How is ffmpeg used with a video filter circa 2017 to adjust gamma/contrast, brightness and saturation?
Stack Exchange resources that are a few years old point to the filter mp=eq2=, but it seems to ...
35
votes
2answers
68k views
How to downsample 4k to 1080p using ffmpeg while maintaining the quality?
I have some 4K 3840x2160 footage in MP4 format that I need to bring down to 1080p. I tried running
ffmpeg -i orig.mp4 -vf scale=1920:1080 smaller.mp4
but the result is very poor quality, with the ...
32
votes
2answers
182k views
How do I set up and use ffmpeg in Windows?
I understand that ffmpeg is a powerful tool for video file conversions. I see online in many places people suggesting it for solutions or getting help in how to use it. The problem is I don't even ...
31
votes
3answers
122k views
Fix bad files and streams with ffmpeg so VLC and other players would not crash
It happened me many times that I could end up in corrupted video files:
video downloaded from official sources but with torrent and for some reason not all the pieces are there in .mkv, .ts or .mp4
...
30
votes
1answer
83k views
How do I change frame size, preserving width (using ffmpeg)?
I'm new to this StackExchange site, and to using the FFmpeg encoder. I have a video that is 720x480 (3:2) that I would like to change to 720x406 (16:9) to match the other videos I have for a site. I ...
29
votes
4answers
82k views
How to losslessly encode a jpg image sequence to a video in ffmpeg?
I have a large set of jpgs that I want to convert to a video losslessly (or, at the very least, very close to losslessly as long as the encoding time isn't much higher than otherwise).
Naively, I ...
29
votes
3answers
40k views
How to fade in/out a video/audio clip with unknown duration?
I'm working on a project where I'm using ffmpeg to batch convert some video files, and adding fade in/out effects at the head and tail of each clip.
I've been using this bit of code to add the fade/...
28
votes
5answers
123k views
How to encode a video at 30 FPS from images taken at 7 FPS
I have no knowledge whatsoever about video encoding, I have an application written in OpenGL and I am saving the frames it generated into png images. The frames from my app are at 7 FPS and I am ...
28
votes
5answers
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How to prevent ffmpeg from dropping metadata?
When I am simply copying a.MOV (from my iPhone) to c.MOV, ffmpeg drops a lot of metadata, (including the time and location of the video).
I tried -metadata, but ffmpeg still drops the information (...
26
votes
1answer
33k views
How to use FFmpeg Command for Reverse Video?
i am use to FFmpeg library in android for reverse video. I can dump images from video but how to reverse all images and make video. See this link that from i am use to library in my gradle.. Library ...
26
votes
5answers
63k views
Non-Monotonous DTS on concat (ffmpeg)
After running this command ffmpeg -f concat -i mylist.txt -c copy output.mp4 - I'm getting corrupted output.mp4 file and this message:
ffmpeg -f concat -i mylist.txt -c copy output.mp4
ffmpeg version ...
25
votes
1answer
72k views
How to deinterlacing with ffmpeg?
I have the following VOB file:
→ ffmpeg -i input.vob output:
ffmpeg version N-77455-g4707497 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
...
21
votes
8answers
28k views
Is there a way to pause and resume FFmpeg encoding?
I record a few hours of video footage every day, which I set in queue for encoding with ffmpeg. I use the veryslow preset with x265, so a single hour of video may take up to 20 hours or more to encode....
20
votes
2answers
30k views
Convert mp4 to webm without quality loss with ffmpeg
What is the best way to convert a mp4 file to webm without quality loss (using vp8 or vp9) with ffmpeg?
If I do ffmpeg -i in.mp4 out.webm the quality is very bad. I can specify a target bitrate via -...
20
votes
4answers
46k views
How can I convert .MTS file (AVCHD) to .mp4 by ffmpeg without re-encoding H264 video stream?
Note: I posted same question to stackoverflow a short time before, when I have not found this comunity yet. I repost this since the question is more suitable to this community.
1. What I tried
I ...
18
votes
2answers
67k views
How to use ffprobe to obtain certain information about mp4/h.264 files
I am but a lowly PHP developer that has been tasked with retrieving some basic information about 100's of thousands of video files. I've had some luck using ffmpeg and extracting the video bitrate, ...
17
votes
2answers
26k views
How to concatenate clips from the same video with ffmpeg
I have a long video with different scenes in it.
I want to extract and concatenate 2 scenes from the video (that do not start on an I-frame) using ffmpeg 2.1.4.
For argument, say I want 5 seconds ...
15
votes
2answers
30k views
Is it possible to speed up a video using handbrake?
Is it possible to speed up a video using handbrake ?
I am looking for a software like handbrake to convert videos for faster playback. It should speed up the video up to 30x.
Is it possible with ...
14
votes
1answer
17k views
Can I set the start number for image sequence output?
I am using ffmpeg to convert from video to an image sequence as follows:
ffmpeg -i video.webm image-%03d.png
The first image is labelled 001, but I want it to be labelled 098. Is it possible to set ...
13
votes
2answers
42k views
ffmpeg drawtext filter - create transparent background with text
I am currently working with the drawtext filter. So far I have only been successful with drawtext option configurations to use the right font and place the text horizontally centered. How could i get ...
13
votes
3answers
50k views
encoding 4:2:2 in 10-bit with libx264
I believe that libx264 is now capable of doing 10-bit 4:2:2 encodings, but I can't seem to get it to work. I'm using ffmpeg (info below), and I've also tried the x264 encoder directly. I've tried
...
13
votes
3answers
29k views
Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
I am using below command to push the video to Wowza server, since we are pushing raw H.264 video, the RTP packet does not have the timestamp, and we could observe audio video sync issue while playing ...
13
votes
1answer
27k views
How to limit file size with ffmpeg?
I want to encode a video, that has a length of 60 seconds, to a target or maximum size of 10 MB.
There are two approaches I know of. One is explained in the FFMPEG-Wiki, and the other one I found in ...
13
votes
2answers
8k views
Using h264 in loseless mode brings small unexpected results
I got curious on ffmpeg screen capture capabilities and started messing around with a simple realtime capture test in h264.
ffmpeg -f dshow -i video="screen-capture-recorder" -video_size 1920x1080 -...
12
votes
1answer
14k views
ffmpeg: add 3 seconds of black to video head and tail
Let's say I have a video, which can have any dimensions or codec (e.g. mp4), and I want to add 3 seconds of black frames to its head.
I have seen other variants to this question which pertain to ...
12
votes
2answers
13k views
cutting with ffmpeg results in few seconds of black screen, how do i fix this?
i'm using this command to cut a segment from a video from command line
ffmpeg -i %1 -vcodec copy -acodec copy -ss %2 -t %3 %~n1_cut%~x1
and i call it like
cut.bat video.mp4 001:23:45:678 10
and as ...
12
votes
1answer
14k views
ffmpeg: explicitly tag h.264 as bt.601, rather than leaving unspecified?
I want to tag video as explicitly bt.601, rather than "unspecified". I know players typically choose bt.601 as the default for videos less than 1280 pixels wide, but I want to make it explicit that ...
11
votes
2answers
13k views
What is KeyInt and min-keyint and no-scenecut
I am absolutely new to video processing, I am building a video streaming site and worked with ffmpeg to generate the formats I need for ShakaPackager.
Sadly I don't understand some of the options ...
11
votes
4answers
7k views
OGV Format plays properly on my computer but transcoding drops (duplicate?) frames
I've made a set of screencasts using recordmydesktop on ubuntu 12.10.
The output is an ogv file. When I watch the ogv file using the default movie player (totem) it looks fine - the audio and video ...
10
votes
1answer
11k views
Similar to "levels adjustment" brightness improvement with ffmpeg
I'm composing a video from set of 16bit tiff pictures. The pictures are very dark, and needs to be brightened. Currently I'm applying -vf "mp=eq2=1.0:1.0:0.3:1.0:1.0:1.0:1.0:1.0"
filter to make ...
10
votes
3answers
14k views
How to hold the last frame when using ffmpeg
I'm cutting/converting some videos with ffmpeg. What I'd really like is to be able to have the output hold the last frame for a few seconds (with silence for audio). Is such a thing possible? Or ...
10
votes
2answers
28k views
FFMpeg Encoding and Core Usage
We have developed an application to transcode source .mov files into .ogg, .mp4 and .webm output. It is currently running on AWS EC2 instance g2.8xlarge. It is working (yay!).
My question: Even ...
10
votes
2answers
14k views
How to convert a 3D movie to 2D using ffmpeg
I am looking for a way to convert a 3d movie to a 2d movie.
I found a reference on this forum.
http://www.ffmpeg-archive.org/How-to-re-encode-3d-video-to-2d-video-td4676271.html
10
votes
1answer
16k views
Video converted by FFMPEG has a different duration, why?
I convert videos using FFMPEG. My goal is to convert them to the MP4 container format (MPEG-4 Part 14) with AAC-encoded audio stream and MPEG-4 part 10-encoded video stream.
I use the following line ...
10
votes
1answer
27k views
Convert mp4 to avi while keeping frame rate and quality and being able to play in QuickTime?
I'm trying to convert an mp4 file to avi.
I've tried this basic ffmpeg script:
ffmpeg -i inputFile.mp4 outputFile.avi
It works, but:
the encoded avi file is very pixelated
does not work with ...
10
votes
1answer
3k views
Is it possible in FFMPEG to change scale over time?
Ok, so using the overlay filter, one can change the x/y location of a video over time by using the "t" variable. For example, overlay=x='if(gte(t,2), -w+(t-2)*20, NAN)':y=0 can be used to ...
9
votes
4answers
5k views
How do the super resolution filters in FFmpeg work?
I need to incorporate a small amount of 1080p HD shots in a 2160p 4K composition. I'm not impressed by default upscaling techniques like lanczos/bicubic/trilinear; it seems like my television does a ...
9
votes
1answer
9k views
ffmpeg default output frame rate
What is the default output frame rate chosen by ffmpeg to encode MP4s?
Where is this specified on the man page?
My input video stats are:
r_frame_rate=120/1
avg_frame_rate=31230000/1042111
duration=...
9
votes
2answers
12k views
How to compile FFmpeg with libfdkaac into a single static binary? [closed]
My target is to build a single static FFmpeg binary with libfdkaac and x264 support for OSX and Linux. First, I tried to build one on OSX, I follow the instruction on FFmpeg web:
https://trac.ffmpeg....
9
votes
1answer
31k views
FFmpeg - dropping duplicate frames
FFmpeg knows about duplicate frames in the input video stream as it outputs a message like this:
More than 1000 frames duplicated
Is there some way to tell it: "Not include duplicates into the ...
9
votes
2answers
11k views
What is the difference between ffmpeg and ffmbc now?
Two years ago I've used ffmbc to encode videos to prores, but nowadays ffmpeg also supports prores and avchd. What is the difference between ffmpeg and ffmbc now?
9
votes
1answer
4k views
4x resample videoframes using ffmpeg
I need to speed up video by a factor of 4x, but do not want to drop the frames and instead average them. I.e. each 4 frames are averaged, and produce 1 output frame. Target frame-rate stays the same, ...
9
votes
2answers
15k views
Combine multiple videos as separate streams in one mkv file
So I have multiple videos of the same scenery from different angles. These are stored as separate files. Can I combine these as multiple video streams within one file?
For example I know this is ...
9
votes
1answer
25k views
ffmpeg pixel format definitions
ffmpeg -pix_fmts lists many pixel formats. In my ffmpeg, there are 66 different pixel formats that start with yuv. A few of them are familiar to me (e.g., yuv422p), but most of them are not (e.g., ...
9
votes
1answer
12k views
What is the ffmpeg filter equivalent of "Automatic levels" for colors?
Looking at the documentation about filters there seems to be a curve filter to manipulate color with the following presets:
color_negative
cross_process
darker
increase_contrast
lighter
...
