`ffmpeg` is a free software project aimed at producing tools (libraries and programs) for handling multimedia data.

learn more… | top users | synonyms

8
votes
1answer
949 views

Merge two audio sources with x11grab, possible?

Currently I'm running with the following setup. ffmpeg \ -i http://pub1.di.fm:80/di_vocaltrance \ -f x11grab -s 1920x1080 -r 25 -i :0.0 \ -c:v libx264 -preset fast -pix_fmt yuv420p -s 1280x800 \ -...
0
votes
2answers
2k views

ffprobe or avprobe not found. Please install one

I want to add tags to mp3 converted with youtube-dl & ffmpeg in CentOS 6: command line : youtube-dl -o '/Output/qpgTC9MDx1o.mp3' qpgTC9MDx1o -f bestaudio --extract-audio --metadata-from-title "%(...
1
vote
1answer
26 views

Converting files to OGG with FFMPEG produces an extremely large file

When trying to convert either an mp3 or flac file to ogg, the output ogg file is actually a flac file with a large file size. For instance: running for file in *.mp3; do ffmpeg -i "${file}" "${file/%...
6
votes
2answers
7k views

How to splice sections of a video with avconv?

I have figured out so far that you can cut a section from a video with avconv with a command like this (cuts from 1:00-3:00): avconv -ss 00:01:00 -i "input.avi" -t 00:02:00 -c:v libx264 -crf 23 "...
1
vote
1answer
1k views

Ffmpeg problems on centOS 5.8 64 bit

I did install ffmpeg with winff, unsuccessfully when I try converting avi to x264, it says I don't have it. When I try to convert mp4 to Xvid I get unknown encoder 'libxvid'. It's like nothing really ...
3
votes
1answer
3k views

Trying to compress avi file using ffmpeg

I used the command below to compress an avi file(using ubuntu) ffmpeg -i input.avi -vcodec msmpeg4v2 output.avi but I am getting these errors Incompatible sample format 's16' for codec 'ac3', ...
45
votes
2answers
79k views

How can I reduce a video's size with ffmpeg?

How can I use ffmpeg to reduce the size of a video by lowering the quality (as minimally as possible, naturally, but I need it to run on a mobile device that doesn't have much available space)? I ...
1
vote
1answer
18 views

Creating a GIF animation from PNG files while constraining GIF size

Is there a way, perhaps with ffmpeg or convert, to constrain the size of a GIF created by stitching PNG files? This answer (Creating a GIF animation from PNG files) does not address this, and ...
2
votes
1answer
1k views

FFMPEG - Interpolate frames or add motion blur

I just watched the trailer for the hobbit, and a trailer for the avengers which both feature an increased framerate. A lot of the comments state that this isn't "true" 60fps since it was not shot at ...
0
votes
0answers
39 views

ffmpeg won't upgrade or uninstall on centos 6.8

I'm trying to upgrade ffmpeg on CentOS 6 but everything I try doesn't work. I've tried re-installing to overwrite it but no luck. This is the version and when it was installed. It installed 2 weeks ...
0
votes
1answer
40 views

ffmpeg bash script segment template

I was trying to control ffmpeg file segment function through a bash script to cut a large movie file into smaller pieces. I took a look at the documentation here but this doesn't really cover what I ...
1
vote
0answers
16 views

Record video and audio from an X windows application

I want to script the following scenario, from a server which I access using SSH. Create a screen at an arbitrary resolution, for example 1280x720. Start an application, that will fill this entire ...
0
votes
1answer
27 views

bash script controlling ffmpeg to convert from mkv

Help me debugs this script to create control ffmpeg from a bash script. for f in $FILES do INPUT_MOVIE=`basename "${f%.*}.mkv"` OUTPUT_MOVIE=${MOVIE:1} OUTPUT_MOVIE=${OUTPUT_MOVIE:0:2}") ...
7
votes
1answer
8k views

Re-encoding video library in x265 (HEVC) with no quality loss

I am trying to convert my video library to HEVC format to gain space. I ran the following command on all of the video files in my library: #!/bin/bash for i in *.mp4; do #Output new files by ...
1
vote
0answers
22 views

Record fullscreen program with avconv/ffmpeg?

I'm trying to record a fullscreen program (snes9x) with avconv, aka ffmpeg. I have avconv set up to use my whole screen, but it doesn't capture snes9x when I run it. #!/bin/bash avconv \ -f ...
0
votes
0answers
23 views

ffmpeg issues producing an HLS live stream that works in quicktime

I am trying to produce an HLS live stream that can be consumed by quicktime. Using the command below, the resulting stream (when served by a python SimpleHTTPServer) is playable by VLC and also by ...
0
votes
1answer
33 views

FFMpeg : Creating a video clip of approx. 10 seconds when video duration is unknown without audio-

I am working on a project where I am looking to extract a video clip from an input video. I have found many links(Eg : link) which do this task, but in all this I have to specify video duration. ...
1
vote
1answer
72 views

Convert image based subtitle to text based subtitle inside MKV file

How do I convert a hdmv_pgs_subtitle (which is image based) to a text based subtitle in a MKV file? I have tried ffmpeg -i in.mkv -c:v copy -c:a copy -c:s mov_text out.mkv but that results with the ...
2
votes
3answers
3k views

Convert a video to a fixed screen size by cropping and resizing

I've tried to figure this out myself, but the myriad of options just baffles me. I want to use ideally either ffmpeg or mencoder (or something else, but those two I know I have working) to convert ...
1
vote
1answer
1k views

How to use a wildcard in FFMPEG?

Lets say I want every .mp4 file in a folder as an input file. How does one do that? It only reads it literal.
2
votes
1answer
70 views

FFMpeg : Converting a video file to a gif with multiple images from video

I am working on a project in which the user can upload videos. Is there any way with FFmpeg I can take some images from the video and create a GIF out of it? As the project is in Java, I have a way ...
2
votes
1answer
72 views

How do I split an audio file into multiple?

I found something for videos, which looks like this. ffmpeg -i * -c:v libx264 -crf 22 -map 0 -segment_time 1 -g 1 -sc_threshold 0 -force_key_frames "expr:gte(t,n_forced*9)" -f segment output%03d.mp4 ...
1
vote
1answer
37 views

How can I edit my bash script to account for whitespace entries? [duplicate]

I made a script to automate ffmpeg conversion from mkv > m4v > open the m4v in Subler.app to import the metadata manually, at which point I'll move the file into my iTunes library. I use iTunes ...
0
votes
1answer
22 views

Achieving a high-availability ffmpeg system ?

I was wondering if there's a way to realize a sort of "high-availability" ffmpeg system. Let's say, i have two Linux servers, server1 and server2, dedicated to do some video conversion with ffmpeg. ...
1
vote
2answers
5k views

How to check if a shared library is installed?

My question originates from my problem in getting ffmpeg started. I have installed ffmpeg and it is displayed as installed: whereis ffmpeg ffmpeg: /usr/bin/ffmpeg /usr/bin/X11/ffmpeg /usr/share/...
3
votes
2answers
227 views

How to check if a video is completely downloaded?

I have a bunch of videos which I want to check if they are complete or not. Some of them may be downloaded partially, but they are not faulty. How can I efficiently check if these video are completely ...
2
votes
1answer
132 views

Play subtitles automatically with mpv

Subtitle files come in a variety of formats, from .srt to .sub to .ass and so on and so forth. Is there a way to tell mpv to search for subtitle files alongwith the media files and if it does to start ...
1
vote
1answer
2k views

ZoneMinder compiling error: “missing binary operator before token ”(“”

When installing ZoneMinder 1.25.0 in CentOS 6.4 (64-bit) the following error pops up when executing make: zm_ffmpeg_camera.cpp:105:44: error: missing binary operator before token "(" Full log: ...
1
vote
2answers
71 views

How to use a greped url provided by tshark inside a bash script?

I'm trying to use a url piped from tshark into a while loop. while read line ; do echo "$line" ffmpeg -i "$line" -c copy "filename" done < <(tshark -i tun0 -B 50 -P -V -q -l -Y 'http matches "(...
1
vote
1answer
377 views

How to use sox or ffmpeg to detect silence intervals in a long audio file and replace them by zeros (aka suppress background noise)?

I have a long audio file that was created by concatenating many short files. I would like to detect silence between the speech segments (just a threshold is enough for my purposes) and replace them by ...
1
vote
1answer
1k views

ffmpeg -acodec copy does not copy all audio stream to the new container

I wish i can find ffmpeg help here at stackexchange. I'd been re-encoding old videos to libx264 to save up some storage space, as I thought it should be working based on documentation seems failing to ...
0
votes
1answer
67 views

use ffplay to play a list of audio files

There are many audio and video players but I would like to use one tool for many propose. So I would like to use ffplay as audio and video player. To play a one file the command is like this. ffplay ...
0
votes
1answer
188 views

FFMpeg : GIF to MP4 conversion throws code error.

I am trying to convert a GIF to a MP4. I am getting an error while doing that with specific parameters. What am I doing wrong? Any help would be nice. I would like a mp4 video with high quality, size ...
1
vote
2answers
36 views

How best to reencode video for lower-performance playback?

I have various video files as MKV, including some high-def (1080p) with FLAC audio. These can be played fine on a several-years-old PC with a mid-range graphics card (using mpv/ffmpeg), but when I ...
22
votes
5answers
27k views

How can I use ffmpeg to split MPEG video into 10 minute chunks?

There is often a need in the open source or active developer community to publish large video segments online. (Meet-up videos, campouts, tech talks...) Being that I am a developer and not a ...
0
votes
0answers
28 views

How to create a gamma cross-fade of two pictures using ImageMagick?

I want to make a gamma composite image, as is common with making cross-fades between two video tracks. The composite frames of the cross-fade are made by cross-fading the gamma values of one picture ...
0
votes
0answers
81 views

How to restart script or reboot if FFMPEG / AVCONV get stuck?

I am using AVCONV to stream my webcam on Dailymotion, here is the command : avconv -f video4linux2 -s 853x480 -i /dev/video0 -f flv -b 800k -r 14 rtmp://publish.dailymotion.com/publish-dm/xxx I run ...
9
votes
3answers
14k views

How to convert a VOB file to avi?

I am trying to convert a VOB file copied from a DVD into an avi in Ubuntu 13.10. I tried dvdrip, which failed due to a frame count error or something. I tried acidrip as well, but it always choose an ...
2
votes
3answers
4k views

How to enable libass on Linux?

I tried to enable libass for ffmpeg with this --enable-libass in command but it didn't recognise the command. Does anyone know how to enable libass on Linux?
1
vote
1answer
109 views

ffmpeg output.mp4 with size 0

I have a video upload script in php where i exec the following command exec("/usr/bin/ffmpeg -i ".$folder."/".$filenameIn.".mp4 ".$folder."/".$filenameOut.".flv 2>&1", $output); and the ...
1
vote
0answers
33 views

ffmpeg - generate video with more then 2 images and 2 audio

I have n images (2 < images < n) and 2 audio files I generate a video like below and it works: $ffmpeg -f image2 -pattern_type glob -framerate 1/10 \ -i '*.jpg' -i "concat:Q.mp3|R.mp3" -...
0
votes
0answers
151 views

How to re-encode file A.mp4 with the same settings as B.mp4?

I have a MP4 file with AAC audio and H264 video, let's call it B.mp4. I also have file A.mp4 with the same picture resolution, but: different FPS possibly different audio/video bitrate different ...
0
votes
1answer
50 views

Convert jpeg sequence to movie stream, in realtime, using ffmpeg

I have a process that is creating a jpeg every X seconds. I know it's possible to use ffmpeg to convert a set of jpgs to a movie, but I want to do it in real-time because I am trying to stream it to a ...
0
votes
2answers
133 views

bash: ffmpeg libx265 prevent output

I'd like to use the new codec x265 (libx265) to encode my video collection. For this I created a lovely bash script under linux which works in general very well! But something is strange: I prohibit ...
2
votes
1answer
883 views

mplayer not sending the correct user-agent

I am trying to play a stream through mplayer. Here is the command I execute: mplayer -user-agent "PS4 libhttp/1.60" -cache 8192 -v ffmpeg://http://the_stream_url.m3u8 The stream does not play due ...
8
votes
7answers
24k views

Bash script to convert all *flac to *.mp3 with FFmpeg?

I want to convert all *.flac to *.mp3 in the specific folder. This is what I've tried, but not works: # change to the home directory cd ~/music # convert all *.flac files ffmpeg -i *.flac -acodec ...
0
votes
2answers
679 views

ffmpeg: nvenc mit crf option - very low bitrate

I bought a new computer some time ago.. I installed nvenc for ffmpeg to encode my videos with the h264 codec. To optimize i used the -crf option but something went wrong.. I want to encode a full ...
4
votes
1answer
540 views

Copy file creation date to metadata in ffmpeg

I would like to copy the file creation date of an mp4 file into the file's metadata. I'm pretty sure this can be done with ffmpeg and some nifty Linux commands.
2
votes
1answer
10k views

FFmpeg - Split video multiple parts

I read the following thread, and the solution works if I want to split a video into pieces every two minutes: Split video file into pieces with ffmpeg The problem is that I want to split a video into ...
0
votes
1answer
242 views

Re-encoding video with ffmpeg including all subtitles but not all audio

I'm trying to re-encode video streams from a Matroska file to save space, while keeping all the subtitles as-is, using ffmpeg. I want to write a generic command that works without me having to specify ...