Questions tagged [ffmpeg]
Only questions about programmatic use of the FFmpeg libraries, API, or tools are on topic. Questions about interactive use of the command line tool should be asked on Super User or Video Production. FFmpeg is a free, open source project that produces libraries and programs for handling multimedia data.
26,111
questions
1001
votes
14
answers
989k
views
Cutting multimedia files based on start and end time using ffmpeg
I tried to cut the video using the start and end time of the video by using the following command:
ffmpeg -ss 00:00:03 -t 00:00:08 -i movie.mp4 -acodec copy -vcodec copy -async 1 cut.mp4
By using the ...
- 12.7k
992
votes
31
answers
1.0m
views
How to concatenate two MP4 files using FFmpeg? [closed]
I'm trying to concatenate two mp4 files using ffmpeg. I need this to be an automatic process hence why I chose ffmpeg. I'm converting the two files into .ts files and then concatenating them and ...
- 13k
656
votes
13
answers
673k
views
How can I extract audio from video with ffmpeg? [closed]
I tried the following command to extract audio from video:
ffmpeg -i Sample.avi -vn -ar 44100 -ac 2 -ab 192k -f mp3 Sample.mp3
but I get the following output
libavutil 50.15. 1 / 50.15. 1
...
- 6,577
569
votes
16
answers
422k
views
Rotating videos with FFmpeg [closed]
I have been trying to figure out how to rotate videos with FFmpeg. I am working with iPhone videos taken in portrait mode. I know how to determine the current degrees of rotation using MediaInfo (...
- 20.6k
408
votes
39
answers
528k
views
How do you convert an entire directory with ffmpeg?
How do you convert an entire directory/folder with ffmpeg via command line or with a batch script?
- 11.2k
362
votes
9
answers
865k
views
How to create a video from images with FFmpeg? [closed]
ffmpeg -r 1/5 -start_number 2 -i img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4
This line worked fine but I want to create a video file from images in another folder.
Image names in my ...
- 3,687
360
votes
7
answers
174k
views
FFMPEG (libx264) "height not divisible by 2"
I am trying to encode a .mp4 video from a set of frames using FFMPEG using the libx264 codec.
This is the command I am running:
/usr/local/bin/ffmpeg -r 24 -i frame_%05d.jpg -vcodec libx264 -y -an ...
- 30.9k
334
votes
15
answers
467k
views
Convert audio files to mp3 using ffmpeg [closed]
I need to convert audio files to mp3 using ffmpeg.
When I write the command as ffmpeg -i audio.ogg -acodec mp3 newfile.mp3, I get the error:
FFmpeg version 0.5.2, Copyright (c) 2000-2009 Fabrice ...
316
votes
3
answers
215k
views
ffmpeg overwrite output file if exists
I ran:
ffmpeg -i input.flac output.mp3
This prompts:
File 'output.mp3' already exists. Overwrite? [y/N] y
How do I automatically say "yes"?
- 23.3k
262
votes
10
answers
258k
views
How to add a new audio (not mixing) into a video using ffmpeg?
I used a command like:
ffmpeg -i video.avi -i audio.mp3 -vcodec codec -acodec codec output_video.avi -newaudio
in latest version for adding new audio track to video (not mix).
But I updated the ...
- 3,604
260
votes
1
answer
169k
views
What are the differences and similarities between ffmpeg, libav, and avconv?
When I run ffmpeg on Ubuntu, it shows:
$ ffmpeg
ffmpeg version v0.8, Copyright (c) 2000-2011 the Libav developers
built on Feb 28 2012 13:27:36 with gcc 4.6.1
This program is not developed anymore ...
- 24.4k
233
votes
10
answers
473k
views
Fastest way to extract frames using ffmpeg? [closed]
Hi I need to extract frames from videos using ffmpeg.. Is there a faster way to do it than this:
ffmpeg -i file.mpg -r 1/1 $filename%03d.jpg
?
- 6,344
227
votes
9
answers
322k
views
Use ffmpeg to add text subtitles [closed]
I am trying to add text subtitles to an .mp4 container using ffmpeg:
ffmpeg -i input.mp4 -i input.srt -map 0.0 -map 0.1 -map 1.0 output.mp4
When I am trying to run this line, it gives me an error :
...
- 3,431
222
votes
8
answers
214k
views
Best approach to real time http streaming to HTML5 video client [closed]
I'm really stuck trying to understand the best way to stream real time output of ffmpeg to a HTML5 client using node.js, as there are a number of variables at play and I don't have a lot of experience ...
- 5,200
222
votes
10
answers
185k
views
FFmpeg on Android
I have got FFmpeg compiled (libffmpeg.so) on Android. Now I have to build either an application like RockPlayer or use existing Android multimedia framework to invoke FFmpeg.
Do you have steps / ...
- 2,221
221
votes
1
answer
117k
views
Meaning of ffmpeg output (tbc, tbn, tbr) [closed]
I am using ffmpeg to tell me video info. Specifically:
ffmpeg -i video.ext
I get the output:
Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 704x576 [PAR 12:11 DAR 4:3], 9578 kb/s, 25 tbr, 90k tbn, ...
- 33.6k
207
votes
1
answer
244k
views
ffmpeg - Converting MOV files to MP4 [closed]
I have just installed ffmpeg and I am trying to encode all my uploaded videos to .mp4 file. Most of the users currently upload .mov and I want to convert every video to .mp4.
I am running the command ...
- 4,012
206
votes
16
answers
475k
views
OCI runtime exec failed: exec failed: (...) executable file not found in $PATH": unknown
I have dockerized an app which has ffmpeg installed in it via libav-tools. The app launches without problem, yet the problem occured when fluent-ffmpeg npm module tried to execute ffmpeg command, ...
- 2,407
200
votes
2
answers
190k
views
How to extract 1 screenshot for a video with ffmpeg at a given time?
There are many tutorials and stuff showing how to extract multiple screenshots from a video using ffmpeg. You set -r and you can even start a certain amount in.
But I just want 1 screenshot at, say ...
- 7,385
195
votes
17
answers
209k
views
Fetch frame count with ffmpeg
Does anyone know how to fetch the number of total frames from a video file using ffmpeg? The render output of ffmpeg shows the current frame and I need the frame count to calculate the progress in ...
- 1,951
192
votes
6
answers
289k
views
What are all codecs and formats supported by FFmpeg? [closed]
I need a list of codecs and formats supported by FFmpeg. Where can I find it?
- 1,961
180
votes
17
answers
256k
views
ffprobe or avprobe not found. Please install one
I want to add tags to mp3 converted by youtube-dl & ffmpeg:
youtube-dl -o
'/Output/qpgTC9MDx1o.mp3' qpgTC9MDx1o -f bestaudio --extract-audio --metadata-from-title "%(artist)s -
%(title)s&...
- 2,163
177
votes
3
answers
218k
views
How can I extract a good quality JPEG image from a video file with ffmpeg?
Currently I am using this command to extract the images:
ffmpeg -i input.mp4 output_%03d.jpeg
But how can I improve the JPEG image quality?
- 12.3k
164
votes
6
answers
103k
views
What does 'Past duration X.XXX too large' mean?
When encoding H.264 using ffmpeg I get the following type of warnings en masse:
Past duration 0.603386 too large
Past duration 0.614372 too large
Past duration 0.606377 too large
What do they mean? ...
- 2,540
163
votes
8
answers
145k
views
Convert .flac to .mp3 with ffmpeg, keeping all metadata
How can I convert .flac to .mp3 with ffmpeg, keeping all metadata (that is converting Vorbis comment in .flac files to ID3v2 metadata of .mp3)?
- 13.8k
160
votes
6
answers
219k
views
webm to mp4 conversion using ffmpeg
When I try to convert a webm file to mp4 the output is very very choppy and it appears as if many frames have been dropped by ffmpeg
I used the following commands to convert
ffmpeg -i movie.webm ...
- 4,365
143
votes
4
answers
125k
views
Creating a video from a single image for a specific duration in ffmpeg [closed]
How do I generate a movie using ffmpeg using a single image (image1.png) for a duration of 15 seconds with a specific resolution so when I play the video, the image will appear on screen for 15 ...
- 1,976
143
votes
4
answers
101k
views
ffmpeg concat: "Unsafe file name"
Trying to convert a bunch of mts-files into a big mp4-file:
stephan@rechenmonster:/mnt/backupsystem/archive2/Videos/20151222/PRIVATE/AVCHD/BDMV$ ~/bin/ffmpeg-git-20160817-64bit-static/ffmpeg -v info -...
- 3,309
143
votes
5
answers
75k
views
FFmpeg C API documentation/tutorial [closed]
I am trying to find documentation to use the FFmpeg C API. It seems that only command line documentation is available.
Is there any good documentation/tutorials/links available?
- 8,246
137
votes
4
answers
99k
views
Get ffmpeg information in friendly way
Every time I try to get some information about my video files with ffmpeg, it pukes a lot of useless information mixed with good things.
I'm using ffmpeg -i name_of_the_video.mpg.
There are any ...
- 32.8k
134
votes
7
answers
280k
views
Using ffmpeg to change framerate
I am trying to convert a video clip (MP4, yuv420p) from 30 fps to 24 fps. The number of frames is correct so my output should change from 20 minutes at 30fps to 25 minutes at 24fps. Everything else ...
- 1,349
128
votes
4
answers
156k
views
Text on video ffmpeg
How can I add text overlay on my video in ffmpeg?
i.e. given a video "video1.flv", how can I add "StackOverflow" text during the whole video, positioned in the middle of the screen, with white text ...
- 1,291
118
votes
8
answers
84k
views
Crop MP3 to first 30 seconds
Original Question
I want to be able to generate a new (fully valid) MP3 file from an existing MP3 file to be used as a preview -- try-before-you-buy style. The new file should only contain the first ...
- 35.4k
117
votes
19
answers
161k
views
How to extract duration time from ffmpeg output?
To get a lot of information about a media file one can do
ffmpeg -i <filename>
where it will output a lot of lines, one in particular
Duration: 00:08:07.98, start: 0.000000, bitrate: 2080 kb/...
- 6,463
117
votes
2
answers
259k
views
FFMPEG mp4 from http live streaming m3u8 file? [closed]
How Can I extract mp4 from http live streaming m3u8 file? I Tried this command below:
ffmpeg -i {input file} -f rawvideo -bsf h264_mp4toannexb -vcodec copy out.mp4
I took this error:
[NULL @ ...
- 1,541
117
votes
12
answers
169k
views
FFmpeg: How to split video efficiently?
I wish to split a large avi video into two smaller consecutive videos. I am using ffmpeg.
One way is to run ffmpeg two times:
ffmpeg -i input.avi -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:00 ...
- 1,310
113
votes
3
answers
103k
views
FFMPEG mux video and audio (from another video) - mapping issue
I would like to place the audio from a video to another video without an audio (in one command):
ffmpeg.exe -i video1_noAudio.mov -i video2_wAudio.mov -vcodec copy -acodec copy video1_audioFromVideo2....
- 1,600
109
votes
5
answers
103k
views
Rotate mp4 videos without re-encoding
I'm looking for a way to rotate videos shot with my Nexus 4 on my Debian Wheezy sytem. The videos are shot in portrait mode and I would like to rotate them to landscape mode. Preferably the rotation ...
- 1,531
108
votes
4
answers
164k
views
Using ffmpeg to get video info - why do I need to specify an output file? [closed]
I'm using ffmpeg to get info about a video file and I don't want to save the info into a file. ffmpeg is returning all the video info, but it's returning as an error because I'm not specifying an ...
- 5,047
106
votes
8
answers
220k
views
Retrieving and Saving media metadata using FFmpeg
I want to read the metadata in media files and then save that metadata in a text/xml file, so that I can later insert that data in my database. I would prefer to use ffmpeg.
Also is the same thing ...
- 2,419
103
votes
4
answers
203k
views
Using ffmpeg to encode a high quality video [closed]
I have a set of video frames saved as images in a directory, and I'm trying to encode these to a good quality video, however every setting and every format I try produces very noticeable artifacts.
...
- 1,817
99
votes
5
answers
368k
views
ffmpeg usage to encode a video to H264 codec format
I have a *.mp4 video file(MPEG4 video codec) and I am trying to convert this to a H264 video codec format(raw h.264 format) using ffmpeg on Linux(Version - FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, ...
- 18.7k
98
votes
7
answers
90k
views
How to overlay/downmix two audio files using ffmpeg
Can I overlay/downmix two audio mp3 files into one mp3 output file using ffmpeg?
- 1,337
97
votes
10
answers
133k
views
How can I get the resolution (width and height) for a video file from a linux command line?
I've been digging through the mplayer/mencoder and ffmpeg documentation and I can't seem to come up with anything. I'm not especially picky as to the output format as I can use a regular expression to ...
- 47.3k
97
votes
10
answers
82k
views
FFMPEG: Too many packets buffered for output stream 0:1
I want to add a logo to a video using FFMPEG. I encountered this error: "Too many packets buffered for output stream 0:1.", "Conversion Failed.". I tried with diffent pictures and videos, always got ...
- 1,123
96
votes
5
answers
216k
views
FFMPEG- Convert video to images
how can i convert a video to images using ffmpeg? Example am having a video with total duration 60 seconds. I want images between different set of duration like between 2-6 seconds, then between 15-24 ...
- 1,503
95
votes
1
answer
125k
views
How to add transparent watermark in center of a video with ffmpeg?
I am currently using these commands:
Top left corner
ffmpeg –i inputvideo.avi -vf "movie=watermarklogo.png [watermark]; [in][watermark] overlay=10:10 [out]" outputvideo.flv
Top right corner
ffmpeg –...
- 5,715
94
votes
12
answers
109k
views
Solid FFmpeg wrapper for C#/.NET [closed]
I have been searching the web for some time for a solid FFmpeg wrapper for C#/.NET. But I have yet to come up with something useful. I have found the following three projects, but all of them apears ...
- 3,143
93
votes
3
answers
68k
views
ffmpeg.c what are pts and dts ? what does this code block do in ffmpeg.c?
In simple terms what are pts and dts values?
Why are they important while transcoding [decode-encode] videos ?
What does this code bit do in ffmpeg.c , what is its purpose?
01562 ist->next_pts ...
- 1,912
92
votes
6
answers
104k
views
Using ffmpeg to cut audio from/to position
I need to cut parts from an audio file from position to position. When I tried this command
ffmpeg -ss 132 -t 139 -i original.mp3 new.mp3
it started at the second 132, and added the next 139 ...
- 2,181