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.
2,202
questions
411
votes
1
answer
597k
views
How can I crop a video with ffmpeg?
I have an MP4 file of a screen recording that I need to crop. How can I do this with ffmpeg?
- 4,219
114
votes
6
answers
280k
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 ...
- 1,251
76
votes
3
answers
173k
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 ...
- 763
63
votes
7
answers
67k
views
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. It ...
- 733
61
votes
3
answers
189k
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
...
- 1,720
53
votes
3
answers
118k
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 ...
- 655
47
votes
1
answer
55k
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 ...
- 633
46
votes
3
answers
100k
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 ...
- 1,793
42
votes
2
answers
294k
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 ...
- 2,316
41
votes
2
answers
57k
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 ...
- 511
39
votes
6
answers
59k
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, ...
- 527
37
votes
4
answers
94k
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 ...
- 471
35
votes
1
answer
108k
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)
...
- 453
34
votes
6
answers
78k
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 ...
- 473
32
votes
3
answers
46k
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/...
- 671
31
votes
5
answers
138k
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 ...
- 413
31
votes
1
answer
94k
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 ...
- 423
31
votes
3
answers
61k
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 -...
- 491
27
votes
9
answers
45k
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....
- 1,793
25
votes
2
answers
85k
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, ...
- 342
20
votes
2
answers
48k
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 ...
- 365
20
votes
2
answers
22k
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 ...
- 201
20
votes
4
answers
48k
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 ...
- 343
19
votes
1
answer
28k
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 ...
- 365
19
votes
4
answers
61k
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 ...
- 343
18
votes
2
answers
29k
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 ...
- 283
18
votes
4
answers
19k
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 ...
- 293
18
votes
5
answers
18k
views
How to identify HDR video?
I need to validate if a video file (HEVC encoded) is or is not an HDR video. I know that there are many HDR standards, but I did not find a way to identify it using mediainfo or ffprobe.
The need is ...
- 333
17
votes
5
answers
89k
views
How to download and encode a video from a MPD manifest?
I can watch videos on a website with MPEG-DASH technology.
I can obtain the video's manifest.mpd file from the website. (I am not sure whether the file contains any user credentials or not, so I am ...
- 271
16
votes
4
answers
15k
views
ffmpeg: Create a black background video from audio, for Youtube upload
I have MP3 audio that I would like to turn into video, by joining the audio with a solid black background. I then want to upload the video to Youtube.
Using ffmpeg, I have tried this command, and a ...
- 1,793
16
votes
3
answers
26k
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 ...
- 263
16
votes
1
answer
20k
views
ffmpeg: how to add several subtitle streams
I tried to add 2 .srt subtitles to a video, but the resulting file has only the first subtitle. This is the command I used:
ffmpeg -i $movie.mov -i $sub_en.srt -i $sub_de.srt \
-c:v copy -c:a copy \
-...
- 587
16
votes
3
answers
61k
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
...
- 13.8k
16
votes
1
answer
48k
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 ...
- 1,592
16
votes
1
answer
38k
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 ...
- 263
15
votes
2
answers
47k
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 ...
- 371
14
votes
2
answers
11k
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 -...
- 1,720
14
votes
2
answers
19k
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 ...
- 243
13
votes
4
answers
19k
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 ...
- 233
13
votes
2
answers
16k
views
FFMPEG: Delete chapters
I have a video file, video.mp4. This file has 3 chapters, 'Beginning', 'Middle' and 'End'. I want to delete chapter 'Middle' (the actual video, not just the metadata) and combine chapters 'Beginning' ...
- 131
13
votes
1
answer
17k
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 ...
- 2,789
13
votes
1
answer
16k
views
How to encode for YouTube with ffmpeg?
I just read Recommended upload encoding settings article from official google support. I think this is the best settings for encoding my youtube videos.
Can you help me find out how to encode that ...
- 233
13
votes
2
answers
36k
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 though ...
- 233
13
votes
1
answer
17k
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
...
13
votes
2
answers
5k
views
Using ffmpeg to cut videos with more precision than key frames allow
I'm trying to cut a video (a debate on TV) with FFmpeg without re-encoding, and I need to cut between 2 sentences a guy pronounce. I think the precise moment is between two keyframes, because whatever ...
- 233
12
votes
1
answer
20k
views
FFMpeg: "Invalid audio stream. Exactly one MP3 audio stream is required"
I am trying to adapt this FFmpeg script that encodes all video files in a directory, to instead convert mp3 files present in that directory with similar preferences.
The original script:
This works ...
- 1,793
12
votes
3
answers
22k
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
- 243
12
votes
1
answer
20k
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 ...
- 121
11
votes
1
answer
14k
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 ...
11
votes
1
answer
39k
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., ...
- 213