Questions tagged [ffmpeg]
Media tool with support for multiple codecs, filters, and containers. Include your actual command and the complete console output when asking questions involving FFmpeg tools. An easy way to do this is by adding `-report` to your command and pasting the contents of the logfile generated. For help with CLI use only of ff* binaries - ffmpeg, ffprobe, ffplay. For help with API usage, post on Stack Overflow.
7,110
questions
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answers
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How do I convert a video to GIF using ffmpeg, with reasonable quality?
I'm converting a video to GIF file with ffmpeg:
ffmpeg \
-i input.flv \
-ss 00:00:00.000 \
-pix_fmt rgb24 \
-r 10 \
-s 320x240 \
-t 00:00:10.000 \
output.gif
It works great, but output ...
- 6,750
599
votes
9
answers
832k
views
Using ffmpeg to cut up video
I am using ffmpeg to cut out a section of a large file like this:
ffmpeg -i input.wmv -ss 60 -t 60 -acodec copy -vcodec copy output.wmv
The -ss part works fine but the -t is ignored. It correctly ...
- 6,119
540
votes
6
answers
570k
views
Remove audio from video file with FFmpeg
How can I strip the audio track out of a video file with FFmpeg?
- 5,647
440
votes
8
answers
671k
views
How to merge audio and video file in ffmpeg
I want to merge an audio file (.wav or .au format) with a video file (.mp4 format).
Please suggest me how to achieve this. I want to merge these file to new .mp4 video file. An ffmpeg command would ...
- 4,959
313
votes
16
answers
214k
views
Combine one image + one audio file to make one video using FFmpeg
This should be pretty trivial, but I can't find a way to get it to work.
I want FFmpeg to take one JPEG image and an audio file as input and generate a video file of the same duration as the audio ...
- 4,419
299
votes
11
answers
332k
views
How can I make ffmpeg be quieter/less verbose?
By default ffmpeg sends a whole lot of messages to stderr: when built, how it was built, codecs, etc, etc, etc.
How can I make it quieter?
I've tried -v 0 (and -v 10 since the documentation just ...
- 5,203
289
votes
3
answers
455k
views
How to resize a video to make it smaller with FFmpeg
How do I resize a video to make it smaller with FFmpeg? (e.g. from 1024x576 to 720x480.)
- 2,991
247
votes
6
answers
470k
views
Cut part from video file from start position to end position with FFmpeg [duplicate]
I have a video file of 30 minutes, but I want to extract a video from 00:09:23 to 00:25:33.
I can define the startposition with -ss, but I couldn't find one for the end position. Any help please?
- 2,871
240
votes
4
answers
396k
views
How can I convert MP4 video to MP3 audio with FFmpeg?
I need to extract an MP3 audio track from an MP4 video with ffmpeg. I can do this for .flv -> mp3, but I don't know the command line parameters for mp4->mp3. For example, flv -> mp3:
ffmpeg -i video....
user916350
213
votes
7
answers
268k
views
How can I normalize audio using ffmpeg?
I want the loudest peak sound in a movie clip to be as loud as the codec allows, then have every other sound amplified accordingly.
What's a practical example in order to accomplish this using ffmpeg?...
- 2,251
176
votes
2
answers
126k
views
ffmpeg - replace audio in video
How to replace the audio in a video file using an audio file using ffmpeg?
I imagine the command looks like:
ffmpeg -i v.mp4 -i a.wav -MAGIC video-new.mp4
This is very similar to How to replace an ...
- 8,984
161
votes
5
answers
114k
views
How can I get ffmpeg to convert a .mov to a .gif?
I'm trying to convert a .mov to a .gif and I'm not having success.
Here's the error:
ffmpeg -pix_fmt rgb24 -i yesbuddy.mov output.gif
ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg ...
- 1,971
146
votes
12
answers
302k
views
How to get video duration in seconds?
How can I get video duration in seconds?
What I've tried:
ffmpeg -i file.flv 2>&1 | grep "Duration"
Duration: 00:39:43.08, start: 0.040000, bitrate: 386 kb/s
mediainfo file.flv | grep ...
- 1,847
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votes
7
answers
171k
views
FFMPEG: Convert m4a to mp3 without significant loss
I have a load of audio files (about 1000) which I want to convert from m4a to mp3 so I can use play them on a CD player which has a USB port.
I tried doing something simple like: ffmpeg -i FILE.m4a ...
- 2,954
125
votes
7
answers
127k
views
In ffmpeg, how to delay only the audio of a .mp4 video without converting the audio?
In my .mp4 file the audio delay is -3840 ms. I synced it in KMplayer, and I don't want to use MKVGUI to make a .mkv file. I just need to delay the audio by 3840 ms, everything else should be left ...
- 1,251
117
votes
7
answers
99k
views
How do I speed up a video by 60X in ffmpeg?
I found this example
ffmpeg -i input.mkv -filter:v "setpts=0.5*PTS" output.mkv
but I have a video I want to speed up by 60 times, not just 2X.
- 1,272
116
votes
13
answers
309k
views
How to create a video from images using FFmpeg?
Is it possible to use ffmpeg to create a video from a set of sequences, where the number does not start from zero?
For example, I have some images [test_100.jpg, test_101.jpg, test_102.jpg, ..., ...
vailen
113
votes
8
answers
249k
views
How to extract one frame of a video every N seconds to an image?
How can I convert a video file to a sequence of images, for example one frame every N seconds. Can mplayer or ffmpeg do this? I have used MPlayer to grab screenshots manually but I would like to ...
- 3,060
113
votes
9
answers
120k
views
Meaningful thumbnails for a Video using FFmpeg
FFmpeg can capture images from videos that can be used as thumbnails to represent the video. Most common ways of doing that are captured in the FFmpeg Wiki.
But, I don't want to pick random frames at ...
- 1,911
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votes
8
answers
126k
views
How can I rotate a video 180° with FFmpeg?
I have a video that was rotated 180° when recorded. Is it possible to correct this with FFmpeg?
- 24.8k
102
votes
3
answers
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views
Converting video from 1080p to 720p with smallest quality loss using ffmpeg
I stack with my high quality movie: 1080p with 60fps. The trouble is lags while playing.
I tried to convert it to 720p with ffmpeg:
ffmpeg -i MyMovie.mkv -r 60 -s hd720 MyMovie_720p.mkv
But I ...
- 1,199
100
votes
9
answers
192k
views
Use ffmpeg copy codec to combine *.ts files into a single mp4
I've got a bunch of ts segments described by a single index.m3u8 file:
index.m3u8
segment1_0_av.ts
segment2_0_av.ts
segment3_0_av.ts
segment4_0_av.ts
segment5_0_av.ts
I know they are ...
- 1,671
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votes
3
answers
103k
views
Why would I choose Libav over FFmpeg, or is there even a difference?
From what I've seen it looks to me like Libav's avconv is thought to become a successor of ffmpeg — is that correct?
If that's true, why is that so? What exactly is libav doing better and why would ...
- 1,434
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votes
6
answers
256k
views
How many threads does ffmpeg use by default?
I see that there's a -threads <count> command line option in ffmpeg. What is the default value of this option?
- 1,259
97
votes
10
answers
89k
views
How can I remove multiple segments from a video using FFmpeg?
I am trying to delete a few sections of a video using FFmpeg.
For example, imagine if you recorded a show on television and wanted to cut out the commercials. This is simple with a GUI video-editor; ...
- 1,279
97
votes
3
answers
100k
views
Resizing videos with ffmpeg/avconv to fit into static sized player
I have a html 5 video player which is 700px wide, 400px high. I'm trying to use avconv to use ffmpeg to resize (while retaining the aspect ratio) and making sure it fits into my player.
Input can be a ...
- 1,461
91
votes
7
answers
181k
views
How to extract subtitle from video using ffmpeg?
I am trying to extract subtitle from video as .srt file, I used the following command:
ffmpeg -i mytestmovie.mkv -vn -an -codec:s:0.1 srt sub.srt
But, I got an error as Unrecognized option codec:s:0:...
- 921
91
votes
8
answers
109k
views
Reduce background noise and optimize the speech from an audio clip using ffmpeg
I extract audio clips from a video file for speech recognition. These videos come from mobile/other handmade devices and hence contain a lot of noise. I want to reduce the background noise of the ...
- 1,023
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votes
7
answers
118k
views
How do I use ffmpeg to get the video resolution?
I am trying to get resolution of the video with the following command:
ffmpeg -i filename.mp4
I get a long output, but I need just the width and height for my bash script. How should I filter out ...
83
votes
7
answers
108k
views
Concatenate multiple WAV files using single command, without extra file
I want to concatenate multiple WAV files into a single WAV file using FFMPEG.
I have used the following command and it generates the required file.
Command:
ffmpeg -f concat -i mylist.txt -c copy ...
- 1,053
83
votes
6
answers
131k
views
Using desktop as fake webcam on linux
I want to make a live stream of (a window on) my linux desktop using a free streaming site, using the captured video as a fake webcam. There are many tools for this on windows. ffmpeg allows me to ...
- 961
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votes
3
answers
94k
views
FFMPEG Splitting MP4 with Same Quality
I have one large MP4 file. I am attempting to split it into smaller files.
ffmpeg -i largefile.mp4 -sameq -ss 00:00:00 -t 00:50:00 smallfile.mp4
I thought using -sameq would keep the same quality ...
- 1,305
79
votes
4
answers
206k
views
Strip metadata from all formats with FFmpeg
How can I remove all metadata from all formats via FFmpeg?
I can just set special metadata for each format per man ffmpeg. Any option or method to clear all metadata and strip media from all metadata ...
79
votes
1
answer
128k
views
Add audio to video using FFmpeg
I’m trying to add sound to a video using FFmpeg, but for some reason, when I play the resulting file, it doesn't have any sound. I also tried doing it with an aac audio file, as well as leaving out -...
- 1,650
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votes
14
answers
142k
views
Properly downmix 5.1 to stereo using ffmpeg
I have a 5.1 audio track from a film where front left and front right contains music, and center contains dialogue. Playing the 5.1 track in VLC blends everything together nicely.
I'm trying to ...
- 2,087
74
votes
4
answers
159k
views
Install FFmpeg on OS X
Is there a good place or bash script I can use (or at least a version I can build myself) for FFmpeg on OS X?
I have Xcode installed as well as the CLI for Xcode (gcc etc).
I have a version of ...
- 841
73
votes
1
answer
273k
views
How to specify audio and video bitrate
I have a mov file with the following media information:
Stream 0
Type: Video
Codec: H264-MPEG-4 AVC (part 10)avc1
Language: English
Resolution: 1280x720
Frame rate: 24
Stream 1
Type: Audio
Codec: ...
- 5,985
72
votes
7
answers
127k
views
What is the correct way to fix keyframes in FFmpeg for DASH?
When conditioning a stream for DASH playback, random access points must be at the exact same source stream time in all streams. The usual way to do this is to force a fixed frame rate and fixed GOP ...
- 1,689
70
votes
1
answer
8k
views
Why does FFmpeg choose 10+20+20 ms instead of an even 16 ms for 60 fps GIF images?
I have a short 60 fps video which I'd like to turn into a GIF file. I run
ffmpeg -i foo.flv foo.gif
and it produces a GIF file. Great!
The only problem is that the motion in the produced GIF video ...
- 523
69
votes
6
answers
144k
views
FFMPEG convert flv to mp4 without losing quality [duplicate]
Currently I'm converting .flv flash files to .webm and .mp4 files to be used with an HTML5 video player.
_
I use this ffmpeg command for WEBM: ffmpeg -i filename.flv -vcodec libvpx -acodec libvorbis ...
- 805
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votes
3
answers
72k
views
Why does preset "veryfast" in FFmpeg generate the most compressed file compared to all other presets?
The FFmpeg wiki says that the best compression rate is by preset "veryslow".
But when I am trying it with my video then preset veryfast provides the best compression in my case.
The following is the ...
- 791
66
votes
4
answers
218k
views
Best settings for FFMpeg with NVENC
I'm using my FFMPEG with the suport of my GPU (NVENC) to convert files from my satelite receiver (SD, mpeg2 .TS-Files) into h264 .mp4-files
Here is the line i'm using
ffmpeg -i "e:\input.ts" -vcodec ...
- 707
65
votes
2
answers
135k
views
How do I convert 10-bit H.265 / HEVC videos to H.264 without quality loss?
My laptop can't handle 10bit H.265 / HEVC videos, so I'm looking to convert them to 10bit H.264. How do I do this using, say, ffmpeg, with the least quality loss? And how can I convert 10-bit H.265 to ...
- 1,251
64
votes
3
answers
144k
views
How to encode audio with Opus codec?
The Opus audio codec looks like the best codec so far for compressing audio. It has recently become supported in the latest ffmpeg and VLC players. However, there is no documentation I can find on how ...
- 1,017
63
votes
1
answer
103k
views
Convert specific video and audio track only with ffmpeg
I have an MKV file (vidui.mkv) with 6 tracks in it.
Track 1 - video - xvid - 1920x1080
Track 2 - video - xvid - 720x576
Track 3 - audio - AAC - 1240kbps - English
Track 4 - audio - AAC - 648kbps - ...
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63
votes
3
answers
108k
views
What is -crf used for in FFmpeg?
When converting an array of JPEGs to a video file (Ogg format) I have been using the -crf option. What are the valid ranges for -crf? Currently I am using 23.
I cannot find the bookmark I read to ...
- 939
61
votes
1
answer
137k
views
Downloading m3u8 videos [closed]
I am trying to download video from a .m3u8 livestream video format.
How can I download m3u8 videos using software on my personal computer such as ffmpeg, youtube-dl, VLC, etc?
M3U is a computer file ...
- 741
61
votes
3
answers
115k
views
Extracting wav from mp4 while preserving the highest possible quality
I went through the documentation and I can extract a wav file from an mp4 file with the command:
ffmpeg -i my_video.mp4 output_audio.wav
However, how can I control the quality of the wav file? (e.g. ...
- 7,008
61
votes
1
answer
190k
views
Convert AVI (Xvid) to MP4 (H.264) keeping the same quality
I want to compress an AVI file to MP4 using an h.264 codec. I could not get the same quality. How can I compress it?
Original Video:
Original Video Screen:
FFmpeg console output (ffmpeg -i input....
user183129
59
votes
2
answers
111k
views
Convert an MP3 from 48000 to 44100 Hz?
I have some MP3s that are in 48000 Hz sampling frequency.
I'd like to burn them to CD, so I have to reduce the sampling frequency into 441000.
How to do that using ffmpeg?
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