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.
2,016
questions
6
votes
4
answers
24k
views
Batch conversion into a new folder with ffmpeg
I'm trying to batch encode 45 video files, and copy the encoded files into an existing subfolder called "encode"
I've used the suggested code from this question (https://stackoverflow.com/questions/...
- 661
6
votes
2
answers
3k
views
restart ffmpeg job from failure
Is there a common technique or some sort of strategy for restarting a failed transcoding job from where it had left off when it crashed (or stopped for whatever reason)?
For example, if I have a 2 ...
- 181
6
votes
1
answer
20k
views
How to precisely trim video with ffmpeg? -ss and -t are off by more than a half second
To put this plainly, -ss and -t don't work very well or even consistently.
I'm trying to take a single input file1 and only encode from a certain start point, -ss, and for only a certain time, -t. I'...
- 2,134
6
votes
2
answers
7k
views
How to combine ffmpeg vf commands for resizing and color correction?
I'm currently using the following batch script to run an ffmpeg command:
@echo off
title Convert videos to Mp4 h.264 with FFMPEG.
echo This script will find all video files of a given extension then ...
- 2,134
6
votes
1
answer
4k
views
Finding the place where a video loops
I got a video of a fireplace, the video is 3 hours long.
I can see that it is looping as the logs keep burning forever. My guess is that it is looping in the region of 5-15minutes.
Is there some ...
- 63
6
votes
1
answer
15k
views
How to decode the PTS timestamps and extract the video frames
I want to extract the video frames and get the PTS timestamp for each one of them. I have an input MPEG-2 TS file and I prefer to use some open source tool like ffmpeg or something similar. The ...
- 341
6
votes
2
answers
12k
views
ffmpeg not creating exact duration clip
I am trying to create small clips from video file using ffmpeg3. The type of clip and video will be same i.e. mp4 to mp4 only. Below is command, which is being used for same.
ffmpeg -ss 00:07:00.000 -...
6
votes
1
answer
6k
views
Finding frames in video that match an image
I'm trying to find frames in a video that match a certain input image. I'm currently using this command:
ffmpeg.exe -i video.mp4 -loop 1 -i image.jpg -an -filter_complex "blend=difference,blackframe=...
- 165
6
votes
2
answers
21k
views
green screen to transparent with ffmpeg
ffmpeg does a very good job of getting rid of a green screen, with a command like this:
ffmpeg -f lavfi -i color=c=black:s=606x1080
-i input.mp4
-filter_complex
"[1:v]...
- 165
6
votes
1
answer
4k
views
ffmpeg: can I crop using vf while also using filter_complex at the same time?
I have an ffmpeg command using -vf to square crop a video:
ffmpeg -i input.mp4 -vf \
"crop='if(gte(iw,ih),ih,iw):if(gte(ih,iw),iw,ih)', scale=720x720" \
-an -c:v libx264 -profile:v high -level 4.1 \
-...
- 217
6
votes
1
answer
4k
views
Merge two transparent webm videos with FFmpeg
I'm trying to merge two transparent webm videos together while keeping their transparency using ffmpeg.
Main video:
https://s3.amazonaws.com/medlike/logo.webm
Overlay video:
https://s3.amazonaws....
- 81
6
votes
1
answer
2k
views
How do I speedup encoding of a video that has just 1 static frame with ffmpeg and lib264 library?
I'm making mp4 (libx264 + aac) videos that have just one static image throughout the whole video. It's basically a narrated text with a nice background.
The question I've is how could I speed up ...
- 271
6
votes
0
answers
3k
views
CRF for 'visually lossless' for libx265 [duplicate]
The ffmpeg wiki page for H.264 states that:
Consider 18 (CRF) to be visually lossless or nearly so: it should look the
same or nearly the same as the input but it isn't technically
lossless.
...
- 161
6
votes
1
answer
950
views
Trying to sync audio in mpeg2 video whose video freezes first 8 seconds in playback
So I have a handful of old mpeg2 (.mpg) files with the following profiles as provided by ffmpeg (the timecodes on each are different):
Stream #0:0(eng): Video: mpeg4 (Advanced Simple Profile) (mp4v / ...
- 163
5
votes
3
answers
17k
views
Concat two video files with fade effect using FFmpeg
Is there any way to concat two video files with a fading effect using FFmpeg?
Something like this:
ffmpeg -f concat -i input.txt -c copy "--with:fade:out-in" output.ogg
- 153
5
votes
2
answers
9k
views
Use ffmpeg to create a video from a few images
I trying to create a video using FFmpeg from a few images. I tried several ffmpeg commands but I can't repeat each image for several frames, instead, each image is one frame size and the video result ...
- 155
5
votes
3
answers
3k
views
Software for detecting Photosensitive Epilepsy content
As part of various broadcasters requests media provided for broadcasting environment must be PSE (Photosensitive Epilepsy) free. There should be not frames sequences that could trigger that symptoms.
...
- 1,504
5
votes
3
answers
5k
views
FFMPEG slow / fast motion part a video anywhere
am trying to cut a part of Video
Here is the code i have tried Let's say i have 6 seconds video and i want to slow down 2:5 seconds video that 3 second video
First approach after searching is, Cut ...
- 151
5
votes
2
answers
22k
views
ffmpeg - video conversion with multiple audio tracks
I am converting an mkv h.264 video to HEVC. The file has two audio tracks. How can I copy all audio tracks?
I used this command (from a .bat file):
ffmpeg -i "!original!" -c:v libx265 -preset medium ...
- 83
5
votes
2
answers
12k
views
Change default audio track of Video file using ffmpeg [duplicate]
I have a video file with extension .mkv. It contains 2 Audio Tracks.
English
Hindi
English Audio track is the default Audio track. I am trying to set the default Audio track to Hindi because when I ...
- 151
5
votes
1
answer
8k
views
ffmpeg - video with timer
I am currently working with the drawtext and drawbox filters to recreate a similar video appearance to what is shown below in the image. I am trying to see of a possible ways to add a count down timer ...
- 351
5
votes
2
answers
7k
views
ffmpeg "Stream specifier matches no streams", but it exists
In ffmpeg, I have the following filter_complex:
color=c=Chartreuse:s=1920x1080:d=8640.059,setpts=PTS-STARTPTS[t];
[1:v] trim=start=114.149:end=124.149,setpts=PTS-STARTPTS [v0];
[t][v0]overlay=0:0:...
- 173
5
votes
1
answer
2k
views
FFmpeg read, ignoring remaining -vf options: Use ',' to separate filters
Getting error
"read, ignoring remaining -vf options: Use ',' to separate filters"
My code:
ffmpeg -i "/root/nisar/a.mp4" \
-map 0:0 -map 0:0 -map 0:0 -map 0:0 -map 0:0 -map 0:1 \
-c:v:0 libx264 -b:...
- 51
5
votes
1
answer
13k
views
Container format requires global headers
Using this FFmpeg:
ffmpeg-20160127-git-9079e99
With this file, if I run this command:
ffmpeg -i Miaow-02-Hidden.m4a -c copy outfile.m4a
I get this message:
[ipod @ 0000000000694500] Codec for ...
- 1
5
votes
1
answer
9k
views
ffmpeg transcoding H264 interlaced and keep interlacing via H264_NVENC codec
I have the following interlaced H264 file:
Stream #0:0[0x335]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
yuv420p(tv, bt470bg, top first), 720x576 [SAR 16:11 DAR 20:11], 25
fps, 50 tbr, 90k ...
- 411
5
votes
1
answer
3k
views
ffmpeg - resize and crop
I want to know how to use the scale filter to take an image that is 2154x1136 and scale it down exactly 89.04% such that the image sits in a 1920x1080 frame, with full image left and right and black ...
- 51
5
votes
1
answer
11k
views
FFMPEG output is blocky
I'm attempting to extract the individual frames from a raw AVC video stream. I'm doing this via the following ffmpeg command: ffmpeg -q 1 -i video_test.avc -f image2 frames/frames_%04d.jpg
The ...
- 153
5
votes
1
answer
4k
views
Lossless convert 3gp video to mp4 using ffmpeg
I'm trying to get lossless conversion of 3gp to mp4 using ffmpeg.
I tried
ffmpeg -i input.3gp -vcodec h264 -c:a aac output.mp4
I tried with "libx264" for the video codec, I tried just a ...
- 153
5
votes
1
answer
562
views
Adding audio to picture: video too long even when using -shortest
I am trying to combine an audio (.wav) file and picture file (.png) into a video file. The video's length should be the same length as the input audio. Also, the output video should be youtube-...
- 151
5
votes
1
answer
10k
views
ffmpeg hardcoded subtitles from the top, bigger, with thicker stroke, on a dark background
I found this page (I can't comment or answer there so here's a new question):
Render srt subtitles to video?
with this line which works fine:
ffmpeg -i input.mp4 -filter:v subtitles=subtitle.srt -c:...
- 51
5
votes
2
answers
4k
views
How match this broadcast standards with Premiere and ffmpeg
I have to export an MXF file for a program that have certain limitations:
Conform to SMPTE 274M, “1920 x 1080 Scanning with no visible video impairment such as blocking errors or pixelization ...
- 1,504
5
votes
1
answer
1k
views
ffmpeg flash frames last still image in concat sequence
I want to concat several pictures into a video. Each picture must have its own duration. I use the most recent windows build for ffmpeg (20170204) and the guide from http://trac.ffmpeg.org/wiki/...
- 153
5
votes
2
answers
10k
views
NVENC_HEVC Encoding making my files larger
I got a new Nvidia GPU to speed up my video encoding. I am working with x264 files to x265 and wanted to go faster. Using the library libx265 I am getting about 85fps when working on a file that is ...
- 191
5
votes
1
answer
341
views
Top and tail GoPro video based on volume
I'm thinking of using ffmpeg to automate a simple video task. I have lots of action videos that go like this, quiet/boring -> loud/exciting -> quiet/boring. Allowing for a few seconds at the start ...
- 51
5
votes
2
answers
6k
views
ffmpeg: white padding is light grey but not white
I want to generate 16:9 thumbnails from videos with white padding but the resulting picture has grey padding instead of white. This is the command line (input here is a jpg but the effect is the same ...
- 155
5
votes
1
answer
7k
views
Is it safe to use the yuva420 pix_format option with ffmpeg to encode webm videos?
I am encoding png image sequences to both webm and mp4 formats using ffmpeg. My goal is to achieve perceptually lossless videos, with the smallest file size I can reasonably achieve.
The webm videos ...
- 95
5
votes
3
answers
8k
views
ffmpeg Cut a media preserving all streams but also all metadata, timecodes and everything else
Today I wanted to obtain a ts file cut preserving everything, so I tried with this command:
ffmpeg -i "original.ts" -map 0 -c copy -t 00:30:0.0 -threads 1 "cutted.ts"
The resulting file have ...
- 1,504
5
votes
3
answers
2k
views
creating a lossless mp4 screencast
I'm trying to create a screencast for playback on the web. Would like to use h.264, webm, and ogg. The source files are in the Apple Animation codec, and they look perfectly accurate. However when I ...
- 51
5
votes
1
answer
6k
views
How should I encode my 4K video stream?
I'm capturing uncompressed 4K video from my Sony A7R II via a video capture device, and am using ffmpeg to save the video.
My problem is I don't know what codec to use. The two options I tried are:
...
- 457
5
votes
1
answer
5k
views
ffmpeg drawtext text parameter expressions
I am trying to write text on a video in such a way that the text "writes itself" - letter by letter.
To do this I was able to do something like this:
-vf "[in]drawtext=text='a':fontfile='/Windows/...
- 83
5
votes
2
answers
3k
views
How can I make a slideshow with ffmpeg?
I have a certain number of pictures that I want to repeat until the melody ends. The problem is that when I make settings it does not work.
the process goes on forever
ffmpeg -pattern_type glob -...
- 51
5
votes
1
answer
4k
views
How does ffprobe identifies I frame and IDR, when it sets key_frame=1
How does ffprobe identifies I frame as an IDR and sets key_frame=1.
Is it for the scene change?
My requirement is to filter out IDR frames: the steps I am following are
ffprobe output_file -...
- 51
5
votes
2
answers
2k
views
Crop a video with a moving crop area of fixed size
I have 3840 × 2160 videos where I want to cut out a moving person on stage (e.g. music video). The crop area is fixed (1080 x 1920). The problem is, the person is moving around. Not much, but in a ...
- 51
5
votes
1
answer
2k
views
Bad quality encodes to Prores4444 with alpha from ffmpeg
EDIT: This bug has been fixed. If you're experiencing the problem below, try updating ffmpeg
I need to supply video with alpha as a prores4444 encoded file. I've been trying to use ffmpeg, but for ...
- 13.6k
5
votes
1
answer
7k
views
Extract key frame from video with ffmpeg
I have a need to generate a thumbnail for videos for a web application and I am currently doing that with this command:
ffmpeg -ss <seconds> -i <input file> -vframes 1 -y <output file&...
- 153
5
votes
1
answer
2k
views
Converting GIMP curves files to Photoshop (.acv) for ffmpeg
I've seen a number of scripts for converting Photoshop .asv .acv files to a GIMP friendly format. Does anyone know if such a tool exists to do the opposite, i.e. converting a GIMP curve file to .asv ....
- 273
5
votes
1
answer
1k
views
Video transitions and filters - how to create custom ones?
I am wondering if there is a possibility to do custom video transitions or filters. Like the video spiraling out, little squares appearing, circling out or something like that. Wiping the video out ...
- 163
5
votes
1
answer
1k
views
FFMPEG demux concat dropping audio at stitch points
I am trying to use FFMPEG (v.3.3.3) concat demuxer and as the file is stitched the audio drops at concat points. As I have files of same codecs, bitrates and so on - it doesn't make much sense to ...
- 53
5
votes
1
answer
2k
views
Largest input image size when encoding a video?
I got a bunch of really large 16 bit videos, approaching 65535×65535 pixels in size. These are essentially high quality timelapse panoramas. I want to convert them to a 7680×4320 movie (8K UHD, 8 bit)....
- 173
5
votes
0
answers
2k
views
Extract the frame (in image format) at exactly every minute (or second) from a video (by ffmpeg)
Motivation: I would like to seek the frame, then take high quality and exact time screenshots (images) from a video.
The video is length is 00:48:43.71 and 23.98 fps (we can think it is 24 fps, isn't ...
- 151