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.
2,132
questions
6
votes
2
answers
2k
views
FFmpeg graph2dot tool
In FFmpeg Filters Documentation is the section 3 graph2dot is this about graph2dot program:
The graph2dot program included in the FFmpeg tools directory can be used to parse a filtergraph ...
- 1,494
6
votes
1
answer
9k
views
ffmpeg concat introduces a/v sync problem
I have one 2-hour video file and want to add a 10-second title sequence to its start. The long file has perfect a/v sync from start to finish. However, when I use ffmpeg -f concat -i mylist.txt -c ...
- 163
6
votes
1
answer
13k
views
How do i put the image behind video by using FFmpeg?
I have one video (400x300) and an image (1280x300).
pls show me how can i put this image behind the video like that:
i've try, but not working T-T
6
votes
2
answers
8k
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:...
- 183
6
votes
1
answer
9k
views
ffmpeg: how to convert to DNxHR in Windows 10?
I have installed ffmpeg version 3.2.2 from the ffmpeg.org download page.
When I enter ffmpeg formats, I see dnxhd but not dnxhr. What do I need to do to be able to manipulate dnxhr?
I have ...
- 537
6
votes
4
answers
25k
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/...
- 671
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
2
answers
27k
views
ffmpeg thread_queue_size warning: What does this mean?
*Edit: changing the render to -preset veryfast will no longer display the warning message. I also noticed that the video itself for the versions where the warning displayed had the last few minutes ...
- 513
6
votes
1
answer
21k
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'...
- 2,164
6
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 ...
- 163
6
votes
1
answer
16k
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
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 ...
- 2,164
6
votes
1
answer
5k
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
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
1
answer
23k
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
5k
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
969
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
18k
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
1
answer
46k
views
RTMP server using ffmpeg
I'd like to use a Teradek Cube connected to a broadcast camera to push to a server running ffmpeg with an open RTMP port, and have ffmpeg re-stream that feed to a decoder using RTMP or RTSP.
...
- 88
5
votes
2
answers
25k
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
10k
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
6k
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
1
answer
9k
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
1
answer
10k
views
Realtime time overlay with ffmpeg
I'm using the following ffmpeg command to create an H.264 encoded MPEG transport stream from a single png file with a text overlay.
ffmpeg -re -loop 1 -i smpte-color-bars-1080p.png -vf drawtext="...
- 265
5
votes
1
answer
14k
views
Changing the input frame rate of a series of images in FFmpeg
I am attempting to animate a series of PNG images at 30 frames per second (and add an audio track) with FFmpeg.
On the command line, I specify the input and output frame rates as 30 fps.
ffmpeg....
- 195
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
2
answers
4k
views
How to extract each video scene with FFmpeg
I'm trying to detect scenes and save them as individual files with FFmpeg. I found this long command somewhere, but it fails with a good detection. I change the scenecut value, but I don't see any ...
- 353
5
votes
3
answers
10k
views
Configure CQP (CRF) for h264_nvenc
Encoding on CPU can be done via:
ffmpeg -i input.mp4 -vcodec h264 -crf 23 -acodec copy h264.mp4
GPU's alternative for the codec is h264_nvenc. How can I pass the same options to it?
I googled and ...
- 193
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
4k
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
605
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 ...
- 1,616
5
votes
1
answer
2k
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
3
answers
10k
views
FFMpeg concat demuxer corrupted output (freezed video on some concatenated parts)
I have big videos with different types of properties and trying to collect some part of these videos by ffmpeg.
I use this command to cut specific parts:
scale video >> scale png >> pad ...
- 151
5
votes
1
answer
346
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
7k
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
8k
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
1
answer
6k
views
How to concatenate multiple videos with fades (from- and to-black) in-between?
I recently had the following problem:
I wanted, using ffmpeg, to concatenate several videos (with audio), adding black clips (with null audio) between them , and lastly fade the videos from those ...
- 111
5
votes
3
answers
9k
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 ...
- 1,616
5
votes
3
answers
3k
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
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
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
6k
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
3
answers
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