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

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22 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 ...
2
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1answer
37 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 ...
2
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1answer
21 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 ...
0
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1answer
32 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
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1answer
80 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
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2answers
28 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 ...
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0answers
16 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 ...
3
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2answers
95 views
+50

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 ...
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0answers
37 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 ...
1
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2answers
61 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 ...
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0answers
28 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
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0answers
102 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
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1answer
43 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 ...
4
votes
1answer
387 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.
0
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2answers
435 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 ...
0
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1answer
184 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 ...
0
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1answer
81 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 ...
2
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1answer
273 views

Why was ffmpeg removed from Debian?

Currently, ffmpeg is missing from APT packages when using the stable versions of Debian and Ubuntu. There are numerous resources (example from SuperUser, another one from Debian's documentation and ...
1
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0answers
116 views

Record high quality video and audio during Skype calls - Bash scripts [closed]

Background Recording live video and audio during a call (or during any X11 desktop activity) is not very difficult thanks to ffmpeg and the amount of help articles available (including this site). ...
1
vote
1answer
125 views

Problem with ffmpeg in bash loop

When running the following command line to convert multiple .mkv files into .mp4 files, things go awry. It's as if the script tries to run all the commands at once or they get entangled in each other ...
0
votes
1answer
448 views

Compiling FFMPEG from source: cannot find shared library

I'm compiling FFMPEG from source using the guide for Ubuntu which I've used before with success. I'm compiling on a Vagrant virtual machine in VirtualBox on Ubuntu server 14.04. You can clone the ...
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0answers
26 views

What's the canonical way to get individual stream size in a video file?

I have a video file. It contains a video stream, and a couple of audio and subtitle streams. I want to get the size of each of these streams. I've already looked at ffprobe/avprobe and mediainfo, ...
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0answers
63 views

Help with MKV to MP4 Remux script [closed]

Overview: I'm trying to remux my mostly MKV library to MP4. I have a script that has gone through and extracted subtitles from the video files. I have another script that will remux any .mkv files ...
1
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1answer
245 views

Split a video to multiple chunks according to multiple starting and ending frame indices

Are there any tools (like FFmpeg or OpenCV) can split a video into multiple chunks according to some specific starting and ending frame indices? For example, given (0,20),(21,33),(40,60)..., each ...
3
votes
2answers
2k views

Merge two video clips into one, placing them next to each other

I have two video clips. Both are 640x480 and last 10 minutes. One contains background audio, the other one a singing actor. I would like to create a single 10 minute video clip measuring 1280x480 (in ...
0
votes
0answers
28 views

gcc on debian - Matlab interferes with ffmpeg?

This is a quite confusing problem. I wanted to use youtube-dl and it stops with the following error message from ffprobe (ffmpeg): ffprobe: ...
1
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0answers
70 views

How to set default subtitle with ffmpeg

I created a mp4 file from video, audio and .srt file. ffmpeg -i video.mp4 -i audio.m4a -i sub.srt -map 0:0 -metadata:s:v:0:0 language=eng -map 1:0 -metadata:s:a:0:0 language=eng -map 2:0 ...
5
votes
1answer
5k 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 ...
0
votes
2answers
110 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 ...
1
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2answers
134 views

Job control over a Bash script

I have a Bash script of a thousand lines each containing an ffmpeg command. I start this with source script and it runs just fine. However, when I try to take control of this script in various ways, ...
2
votes
2answers
235 views

How to stream with ffmpeg in a separate process

I need to stream with ffmpeg on Ubuntu. The streaming should be started from a bash script. Currently, I call ffmpeg like this, as a part of subroutine in a bash script: function startFFMpegEncoder ...
0
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0answers
243 views

allow non-root user to run programs compiled by root in /root/bin

I just finished and installed ffmpeg installation on a centOS box via the guide made by ffmpeg themselves https://trac.ffmpeg.org/wiki/CompilationGuide/Centos As it turns out, ffmpeg was installed at ...
0
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0answers
92 views

ffmpeg configuration error

I downloaded ffmpeg and followed the README. First thing, ffmpeg needs to be configured. But executing configure (./configure) says ~/Downloads/ffmpeg-2.7.2 $ ./configure gcc is unable to create an ...
1
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0answers
26 views

Miro player doesn't recognize subtitle from video encoded by ffmpeg

It was the first time I encoded a video on Ubuntu. I used ffmpeg to extract the video/audio, encode them and join with a subtitle to a new file. All these steps were fine. I used the following ...
0
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0answers
107 views

ffmpeg libass CentOS 5.11

I just got a vps server and it has CentOS 5.11 and kernel 2.6.18. I need to install ffmpeg on it with --enable-libass. I have tried to compile but I'm having problems with libass because I have an old ...
3
votes
2answers
447 views

Create thumbnail from video at random time frame

I'm using this bash script to generate thumbnails from videos: #!/bin/bash source_dir="." output_dir="/output" input_file_types=(avi wmv flv mkv mpg mp4) output_file_type="jpg" r1=$(( ( RANDOM % 10 ) ...
1
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1answer
227 views

Fix flv file with small errors

I have a couple of flv files downloaded with youtube-dl. When they are played they fail after a few minutes with: Unsupported video codec (X) where X is e, 9, or b. My guess is that one block is ...
1
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0answers
97 views

compile ffmpeg centos

I used this Guide http://trac.ffmpeg.org/wiki/CompilationGuide/Centos To install ffmpeg in my VPS with CentOS 6 64. But it was installed in /root/bin/ and I need to install it in usr/bin/ to run ...
0
votes
2answers
1k 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 ...
0
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0answers
24 views

VLC exporting video frames uncontrollably, can't figure out how to stop it (possibly related to ffmpeg)

I have a very peculiar problem. Every time I open a video in VLC, in any format, it immediately begins exporting frames to my Pictures folder I tried deleting VLC and reinstalled a newer version but ...
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 ...
5
votes
1answer
259 views

Bash Script — ffmpeg not being invoked as expected

I'm working on a bash script to convert my music library to ogg* but executing the right command is somehow eluding me. This is the line that should accomplish it: ffmpeg -i "${file}" -f flac pipe:1 ...
-1
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1answer
329 views

how to convert video into webm format using ffmpeg in centos

how to convert video into webm format using ffmpeg and libvpx in centos I have install ffmpeg and libvpx in centos.but it's doesn't convert mp4 format into webm format. but in windows i have check, ...
4
votes
2answers
532 views

gnu parallel: quoted arguments and spaces in file names. How to solve?

This is driving me crazy. I have a bunch of mp3 that I want to transcode using ffmpeg. I'm trying to use this oneliner (the script is bigger, this is the problematic section): find . -type f \( ...
0
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0answers
123 views

Running FFmpeg in While Loop

Here is my problem. I want to run many different multiple ffmpeg instances all in background and all in while true loop. I tried the following command but does not even work: (while true; do ...
0
votes
1answer
331 views

FFMPEG batch convert quits before processing all files

I have an audiobook which consists of over 700 ra files (RealAudio) which I'm trying to batch convert to mp3 using ffmpeg. RA files are named as chapter-verse.ra (e.g. 13-01.ra) I run a script and it ...
2
votes
1answer
797 views

how to convert MOD video file without loosing quality to modern popular format for TV

I have MOD video file. My LG TV doesn't support MOD. How can I convert MOD video file without loosing quality to modern video format to watch it on different modern TVs?
2
votes
2answers
153 views

replace `while` with more suitable function so looping would wait for each process to end

I have a bash script that look out for files recursively under multi-sub folders, then use ffmpeg to each file. at debug, it works great if i use echo ffmpeg but the thing is, at real work where it ...
2
votes
0answers
74 views

Encoding a video from Unix Timestamps + ms

I have a sequence of images that were taken from a camera that have been saved in a naming convention that contains the unix timestamp as well as milliseconds. For instance, 1333351808430.jpg (I typed ...
2
votes
1answer
3k views

Command line for converting .SWF to animated GIF

I'm running Kubuntu. I don't want to install any Windows applications in wine. I would like a (relatively simple) command to convert a flash animation (.SWF file) to an animated GIF. The input .SWF ...