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

learn more… | top users | synonyms

1
vote
0answers
12 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 ...
0
votes
0answers
16 views

ffmpeg -i filename.mp4 display “Segmentation fault (core dumped)” error [on hold]

Whenever i execute ffmpeg -i filename.mp4 it return Segmentation fault (core dumped) error. I am attaching snapshot here
0
votes
0answers
19 views

Alternative to ffplay for Raw Video Playback without X Windows

I am successfully capturing frames from a small USB IR camera on the small Raspberry Pi Linux board. I am using the 'libseek' code to do this: https://github.com/zougloub/libseek I can see alot of ...
1
vote
2answers
68 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
0answers
22 views

Playback and simultaneous recording through external USB sound card

I've an external USB sound card (in my case it's a TerraTec Aureon 7.1 USB). I've looped the earphone-out to the line-in using a 3.5mm jack cable. I'm interested in starting the playback of a MP2 ...
1
vote
0answers
12 views

extracting codec information from rpt stream

I got a list of rtp streams in a list, those are tv channels from my internet provider. I would like to get information about the codec and get the channel names instead of ip addresses, precisely ...
0
votes
1answer
31 views

Find and convert all ALAC files to mp3 / opus / aac

I'm looking for a way to convert all alac files in a directory recursively to another format. Problem: alac as well as aac use suffix m4a, so find -name "*.m4a" doesn't work.
0
votes
1answer
33 views

Error while making movie from png's with avconv or ffmpeg

I want to create a movie from a bunch of png's by using the command: avconv -i pics/*.png out.mp4 or ffmpeg -r 1/1 -start_number 1 -i pics/*.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 ...
0
votes
1answer
61 views

Why convert .GIF to .MP4 file using by ffmpeg on Mac OSX got .MPEG4?

ffmpeg -i original.gif -r 10 outfile.mp4 According to command above, I've got outfile.mp4 but when clicked to see the information of file, i see it's actually a .MPEG4 file and the icon of file is ...
0
votes
0answers
25 views

timout command is not timing out

I have a timeout command that is not timing out. user@db:~$ ps aux | grep 'timeout' user 4979 0.0 0.0 4440 628 pts/144 S+ 18:52 0:00 sh -c timeout 16 mycommand user 4980 0.0 ...
0
votes
0answers
112 views

How to record video from an old webcam using ffmpeg on Linux?

After couple of hours I'm finally ready to accept my absolute lack of knowledge in that topic and decided to post this question here. I've been trying to record video from an old external USB webcam ...
4
votes
1answer
136 views

Trim audio file using start and stop times

I have an FFmpeg command to trim audio: ffmpeg -ss 01:43:46 -t 00:00:44.30 -i input.mp3 output.mp3 The problem I have with this command is that option -t requires a duration (in seconds) from ...
1
vote
2answers
65 views

Change of voice via ffmpeg or other application [closed]

I have a set of audio files containing voice recordings, I need to alter the voice signal so the speaker cannot be recognised in an automated way... Do you know some application?
0
votes
1answer
71 views

ffmpeg is killed

So I have a problem here. I have a session of ffmpeg -f x11grab running, and suddenly kill -9 or Ctrl+Alt+Backspace comes and GUI dies of course. So far everything seems to be OK. When I try to play ...
0
votes
0answers
33 views

error with Transcoding with ffmpeg activated by inotify

I’m trying to automatically transcode videos, that are begin uploaded constantly to a server. That is why I have came up with the idea of using inotify, by checking every moment for new files on the ...
1
vote
0answers
17 views

How to define ffmpeg's path during compilation of another software?

I'm trying to compile an opensource software that needs bleeding-edge ffmpeg, so I successfully compiled ffmpeg, but I don't want to run make install as it's not easy to be removed after my tests. ...
2
votes
0answers
205 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
5 views

Any m2ts trimmer under Linux?

My goal is to trim out m2ts generated by ffmpeg for HLS because the generated m2ts has some overhead. The below is an example of the result analyzed by Apple Media Stream Validator: Average segment ...
0
votes
0answers
43 views

FFmpeg Way to check the pid if it is hanged or not

I'm using FFmpeg to do restreaming in some streams via HLS. I use many different type of streams rtmp,rtsp,http,mmsh. The problem is that sometimes (actually all the time) the ffmpeg hangs in some ...
1
vote
3answers
132 views

Convert to WAV using FFMPEG for pipe into LAME?

I'm trying to convert an AAC file into WAV in order to pipe the output into LAME. I'm looking to do this, specifically: find . -maxdepth 1 -type f -iname "*.m4a" | sort | while read file; do ...
0
votes
0answers
93 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.
4
votes
1answer
124 views

Burning a video file with non-standard aspect ratio to DVD

A standard Unixy command line approach to burning a video file to DVD is as follows (assuming) # 1. First use ffmpeg to convert to an mpg file. ffmpeg -i input.m4v -target ntsc-dvd output.mpg # 2. ...
1
vote
1answer
48 views

Application specific DNS problem?

I'm working on a live stream transcoder application using nginx + ffmpeg. Everything works fine when I use avconv to transcode, but if I use ffmpeg, I get this error: [tcp @ 0xb4e9da0] Failed to ...
2
votes
2answers
44 views

Convert video to exactly the same format as another video

Suppose I have two video files A and B. Now I want to convert A to the same format (i.e. same container, same audio and video codec), same bitrate, size etc. as B. Is there a way to do this ...
1
vote
0answers
61 views

Centos web camera, fast application for snapshot?

I'm using ffmpeg for taking snapshots / still images with web cameras. I'm going to use several web cameras to take photos at the same time or one after the other (timelapse). It's important for me ...
1
vote
1answer
838 views

FFServer streaming H.264 from Logitech C920

I'm having some trouble trying to implement a web live stream from my Logitech C920 webcam w/ H.264 encoding using ffmpeg/ffserver. Here is the configuration file I'm using for the ffserver: # Port ...
1
vote
1answer
82 views

Convert video changing only bitrate

I have a mediaplayer program which lags playing one specific file. My assumption is that it is because of too high video bitrate (41.3 Mbps) and too slow CPU (it is embedded system). So, I want to be ...
1
vote
1answer
94 views

How to create a timed video from still images with specific time between each image?

I want to create a video from still images. My images are: 1.jpg 2.jpg 3.jpg 4.jpg 5.jpg 6.jpg 7.jpg 8.jpg 9.jpg Each of them I want to show for a specific duration, between 1-10 seconds: 1.jpg: ...
1
vote
0answers
211 views

Convert images and animated gifs to video

I use the following FFMpeg command to convert images to video. for file in %N; do ffmpeg -framerate 15 -pattern_type glob -i '*.jpg' -vf ...
0
votes
0answers
111 views

How to stream MPEG video using RTP using VLC command line

I'm attempting to convert the following vlc command line which is streaming an MPEG video over UDP ( no RTP ): cvlc -vvv /vlc/attract.mpg :norm=ntsc :v4l2-width=320 :v4l2-height=240 ...
1
vote
1answer
76 views

x11grab flickers in OpenGL draw areas

I'm using ffmpeg's x11grab to do some screencasting. It works pretty well except on 3D stuff. In particular it seems like 3D draw areas flicker in and out. You can see an example of it here. The ...
0
votes
0answers
28 views

Black screen when splitting media files

When I run for i in $(ls *mp4); do ffmpeg -i $i -ss 0 -t 720.0 -vcodec copy -acodec copy $i-part1.mp4; ffmpeg -i $i -ss 720.0 -vcodec copy -acodec copy $i-part2.mp4; done; in a directory of ...
1
vote
1answer
72 views

x11grab from another display server

I have ffmpeg with x11grab on my local machine, but I want to capture the screen of an X server on 12.34.56.78. How can I do that? The following doesn't work: ffmpeg -f x11grab -r 25 -s 800x600 -i ...
1
vote
0answers
388 views

How to record vfl webcam with ffmpeg? Cannot find a proper format for codec 'none'

Goal is to capture video from my old usb webcam (device 0733:0430). Trying to save video gives this error. (I've tried both ffmpeg and avconv.) Command ffmpeg -f v4l2 -i /dev/video2 -s 160x120 ...
1
vote
1answer
59 views

How to add aac and libx264 to FFmpeg installation?

I've already installed FFmpeg according to the ffmpeg Ubuntu compile guide. I can't use aac audio encoding and libx264, which I need. How do I install FFmpeg so that all the option below are enabled ...
1
vote
1answer
3k 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
111 views

Slow down mp3 audio

I love VLC's option of slowing down audio playback. Now I want to take my mp3-files to a portable player and play them there. Unfortunately the player does not have a slow down option. How can I ...
1
vote
0answers
45 views

FFMPEG stream won't show up on Justin.tv

INRES="1366x768" # input resolution OUTRES="1366x768" # Output resolution FPS="35" ...
2
votes
1answer
294 views

FFmpeg doesn't recognize my audio sources

I want to record my screen with audio for practice. I saw recommendations to use this command line: ffmpeg -f alsa -ac 2 -i pulse -f x11grab -r 25 -s 800x600 -i :0.0+200,100 -c:a pcm_s16le -c:v ...
2
votes
2answers
702 views

Is there any equivalent to the atempo ffmpeg audio filter but for avconv to speed up video(and audio)?

As noted here, we could speedup audio with ffmpeg using ffmpeg -i input.mkv -filter:a "atempo=2.0" -vn output.mkv But on Ubuntu, ffmpeg is replaced by avconv, and the atempo filter is not available ...
0
votes
0answers
104 views

Solaris - calling app from java - no such file or library

I call ffmpeg from a java application on Solaris. If I run ffmpeg with the same parameters from command line, then it works fine, but calling it from Java app results the following error message: ...
1
vote
0answers
475 views

avconv stops streaming after some time

I am using raspberry-pi board and a usb camera attached with it. i use avconv tool to capture live video from camera and streaming it on network using rtp protocol. My command on server(raspberry-pi ...
0
votes
0answers
190 views

Apply fadeout effect to video at multiple places

I have a video of 12 seconds, frame rate is 30 frames per second. I want to apply fade out effect to video on multiple places, for example from second 3rd to 4th and from second 7th to 8th. Have a ...
1
vote
0answers
441 views

Distributed video encoding with ffmpeg

I'm in a process of giving form to a very old dream of mine - to create an efficient and cheap video encoding platform. And following the great examples such as SETI@home, BitTorrent and BitCoin, ...
1
vote
0answers
344 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 ...
1
vote
0answers
165 views

how to install avxsynth on centos?

i am using centos 6 x86_64 and i am trying to install avxsynth for centos, but it always failed from link page i found that i have to install automake libtool MPlayer sudo apt-get install ...
4
votes
2answers
573 views

How to remove silence part from mp3 that is extracted from tv drama

I hear a mp3 that is extracted from some tv dramas as a English exercise. So in that mp3 there are lot of "silence part" in which no one speaks and there is no background music. Is there a way to ...
0
votes
1answer
109 views

Can I get the ffmpeg command-line from an existing video?

I want to generate a video with the exact same settings as an existing video. I can run: ffmpeg -i original.mp4 To get human-readable info about the contents: Duration: 00:05:32.32, start: ...
0
votes
0answers
222 views

Grab from a webcam

On Linux it is easy to use an audio or video grabbing device as input to FFmpeg: ffmpeg -f oss -i /dev/dsp -f video4linux2 -i /dev/video0 out.flv Today someone in kirupa forums said they ...
5
votes
2answers
411 views

How to input a network file to ffmpeg

My problem is this. I have access to a server that hosts many video files, most of them are very large and not well compressed. I intend to make a reduced quality smaller size copy of these on my ...