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.
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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 ...
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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 ...
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votes
12
answers
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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
48
votes
2
answers
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Create video with 5 images with fadeIn/out effect in ffmpeg
With 5 images I have to create a video of 60 seconds in ffmpeg, each image has to display for 15 seconds. after 15 seconds, first image has to fade out and 2nd image has to fade in, after that 2nd ...
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1
answer
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What is the "sameq" or "same_quant" option in FFmpeg? Does it mean "same quality"?
Often, I've seen FFmpeg commands using the sameq option, for example
ffmpeg -i input.mp4 -sameq output.avi
What does this mean? Does it mean "same quality"? If not, what should I use instead?
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votes
9
answers
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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 ...
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votes
7
answers
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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
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votes
4
answers
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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 ...
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votes
8
answers
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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
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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
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?
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votes
9
answers
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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
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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?
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7
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crossfade between 2 videos using ffmpeg
I've been trying to achieve a crossfade transition between 2 video clips using ffmpeg but have failed so far. I'm new to ffmpeg and am mostly relying on tweaking what I can find in the documentation ...
user342545
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votes
5
answers
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views
How to get time stamp of closest keyframe before a given timestamp with FFmpeg?
I want a FFmpeg seeking command that fast and accurate. I found this.
The solution is that we apply -ss for both input (fast seeking) and output (accurate seeking). But: If the input seeking is not ...
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votes
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answers
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What parameters should I be looking at to reduce the size of a .MOV file?
My Canon 60D creates .MOV files when recording video and I've found out that the .MOV container has an H264 video stream and a PCM audio stream.
I've used ffmpeg and GSpot to look at some of my ...
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
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votes
4
answers
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How to cut at exact frames using ffmpeg?
I'm trying to use ffmpeg to cut video files at precise times. The ffmpeg help shows an option -timecode_frame_start to specify the starting frame but I am unable to get this command to work. The ...
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votes
1
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Video produced from images only plays in VLC but no other players
Within my folder with bunch of 13MP bmp images named 0001.bmp, 0002.bmp,... I run the following commands from command line.
Crop images to 4K
ffmpeg -i %4d.bmp -vf "crop=3840:2160:184:240" croped%4d....
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votes
2
answers
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FFmpeg command to convert MP3 to AAC
I can issue this command:
ffmpeg -i input.mp3 -acodec alac -ab 128k -ar 48000 -ac 2 -y output.m4a
to create a m4a file.
But when I issue this command
ffmpeg -i input.mp3 -acodec alac -ab 128k -...
- 1,634
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votes
1
answer
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What bunch of ffmpeg scripts do I need to get HTML5-compatible "Video for everybody"?
What list of commands should I do in ffmpeg/mencoder/some_other_CLI_app to get a video in all the right formats to use Video for Everybody?
i.e. Is there a subtlety that prevents there being a ...
7
votes
2
answers
3k
views
'while read' loop through lines in text file losing characters in Bash script. is FFmpeg line to blame?
I am looping through a text file, using 'while read'. I read three variables from each line - two filenames and a decimal number. I know that this works in a vanilla setup (loop, read line, echo line, ...
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votes
11
answers
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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 ...
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votes
6
answers
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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 ...
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votes
4
answers
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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
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answer
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Why can't Quicktime play a movie file encoded by FFmpeg? [duplicate]
When I try to open a movie I just created with the command:
ffmpeg -pattern_type glob -i '*.JPG' -s 640x480 movie.mp4
I get an error from QuickTime:
The document “movie.mp4” could not be opened.
...
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votes
4
answers
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FFmpeg - Apply blur over face
I'm trying to blur a portion of a video using FFmpeg (specifically to blur a face).
I have been trying to use a combination of timeline editing and the various bluring filters, but I cannot find a ...
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votes
5
answers
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Automatically split large .mov video files into smaller files at black frames (scene changes)?
I have 65 .mov video files named tape_01.mov, tape_02.mov, ..., tape_65.mov. Each is about 2.5 hours long and takes up many gigabytes. They are digital copies of what were VHS tapes (my family's "...
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Making ffmpeg process first audio stream differently than all others
I'm trying to write a command such that ffmpeg executes a given instruction for the first audio stream in a file and a different instruction for any and all others. In the test case below, for ...
4
votes
1
answer
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views
ffmpeg is not even cutting this and other mp4s to the nearest second [duplicate]
I have a file
Other - Analogue Clock-JEJqy1Wlovw.mp4 which is just a download from https://www.youtube.com/watch?v=JEJqy1Wlovw
It's 2 minutes 13 seconds long.
I had some issues cutting it to the ...
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votes
13
answers
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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
72
votes
7
answers
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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 ...
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votes
1
answer
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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
33
votes
5
answers
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views
Change framerate in ffmpeg without reencoding
I have a mkv (h264) video that is 23.976 fps (24000/1001) but I want to convert it to 25fps without reencoding and loosing quality.
I know mkvmerge can do it ( with option --default-duration '0:25fps')...
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FFMPEG / libx264: How to specify a variable frame rate but with a maximum?
Instead of providing a fixed frame rate to FFMPEG/libx264 (-r/-framerate), I would like to specify a variable frame rate with a MAXIMUM value, and allow libx264 to down the frame rate as it sees fit. ...
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votes
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answers
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Which codecs are most suitable for playback with Windows Media Player on Windows XP?
I need to encode a short video in a format that can be played with windows media player on windows xp without installing any additional codecs. For the recoding process I'm using ffmpeg.
I've already ...
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How do I extract the timestamps associated with frames ffmpeg extracts from a video with the -r option?
ffmpeg -i myvid.mp4 -r 25 -t 100 image-%d.jpeg
Is the command I'm using to extract frames and it's working just like I expected. However I'd also like to look at the timestamps of the frames. ...
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votes
1
answer
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ffmpeg: smooth zoompan with no jiggle
I'm trying to create a basic 5 second zoompan to the center of an image (from the example on the ffmpeg.org website). The command below works, but jitters more than my hands after 5 cups of coffee:
...
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What lossy audio formats are more (or less) "efficient"?
This question is related to the answers I got to this question.
The bitrate-efficient format (see the question's most voted answers and their comments thereunder) would be one that assures a good ...
user162573
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vote
1
answer
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views
Convert ffmpeg encoding from libx264 to h264_nvenc
The video hosting website LBRY suggests users try the following command to compress their uploads:
ffmpeg -i input.avi -c:v libx264 -crf 21 -preset faster -pix_fmt yuv420p -maxrate 5000K -bufsize ...
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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 ...
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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.
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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:...
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votes
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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 ...
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votes
1
answer
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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 -...
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Explanation of x264 tune
Running this command:
ffmpeg -i xr.mp4 -tune ya zu.mp4
reveals the possible tune values for x264 and in turn FFmpeg:
[libx264 @ 0000000002167100] Possible tunes: film animation grain stillimage ...
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deprecated pixel format used, make sure you did set range correctly
Why am I getting this warning and how to fix it? Essentially, I want to convert a video to a jpg every 4th frame with the same resolution as original video.
[jalal@goku vid2]$ ffmpeg -i debate_vid2....
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How can I pipe output of ffmpeg to ffplay?
How can I pipe the output of ffmpeg to ffplay?
At the moment I use a workaround in bash :
mkfifo spam
(ffplay spam 2> /dev/null &) ; capture /dev/stdout | ffmpeg -i - spam
- 3,197
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5
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Using ffmpeg to copy metadata from one file to another
I want to use ffmpeg to copy all meta data not associated with core aspects of a video (frame rate, resolution) from one video to another. Is there a simple way to do this with a single command?
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