I'm trying to detect intervals where a given video is frozen. Looking at a related post , apparently FFmpeg has a filter named freezedetect which exactly does this. But the post had no accepted answer, neither any examples.  How can we use FFmpeg for frozen video detection? Any other tool and libraries, as long as free, is also welcome.
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Is there a way to detect frozen video with ffmpeg? I only need to know if there are rather large regions of frozen video, say 10 seconds or more.   I'm familar with the  filter.   Maybe you could first difference adjacent frames, then use blackdetect to tell whether the difference has not changed? I'm not sure how to perform the difference though.
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How can I use ffmpeg to isolate one channel from an audio file? I have a stereo audio file, and I need the output to be the contents of the right channel in a mono audio file.  While I'm sure it's fairly easy to do, I can't figure it out. Thanks for the help!
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I have a series of PNGs that have transparent backgrounds.  When I place them on the strip in Video Editing and render, the background on the video is black.    I've made certain that the Transparent box is checked, and that any file formats, container or codec selections allow for RGBA, before rendering animation.  Still, the background of the video turns out black!  The file is here, and I'm desperate (and appreciative) for direction:   I would like to render the PNG files, within the Sequencer, as an mp4, WITH A TRANSPARENT BACKGROUND.  Hope this is descriptive enough to gather a response?
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Any time I try to watch a flash (or maybe HTML5) video in chrome, when I fullscreen it, Ubuntu freezes, goes black, and then my monitor says "no signal." This only happens on the second or third time of using fullscreen, oddly enough. I can do it once with no issues. This has only been an issue since the update of Chrome 40 a few days ago. The problem does not exist in Chrome. I'm using Intel Haswell graphics, if that is important.
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The conversion answers that I have seen on the web suggest using a -c option in the command line using FFmpeg.  However using Ubuntu 14.04 the -c option does not exist in FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1.  Is there a newer version? If so how can I get it. Using apt-get it says that this is the newest version.
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I need a good video converter application that can convert from/to many video formats. On Windows I found  to be good. I would like its equivalent or something better on Ubuntu.
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I need to convert a set of still images (static cameras pointed at a road) to a video.  I have considered video codecs such as Theora, H.264, VP8, VP9, HEVC, Snow.   The video should have a minimum size with the maximum image quality. Now, from all available command-line arguments, I'm using framerate (fps), b:v (bitrate) and s (width*height). Also, for H.264 and HEVC there are -crf and -preset.  What other command-line arguments can be useful to achieve what I'm after? In ffmpeg dozens of command-line arguments and parsing each can take a long time.
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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 coyly says Set the logging verbosity level. with no indication of what the range of inputs is) -- still not quiet.  I've tried -loglevel quiet -- still not quiet.  I should mention, I'm looking for "quieter," not "no output ever".  If there's an error I want to see it, but I don't need to hear about ffmpeg's configuration every. single. time.
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How can I get video duration in seconds?   What I've tried:  ffmpeg -i file.flv 2&gt;&amp;1 | grep "Duration"   Duration: 00:39:43.08, start: 0.040000, bitrate: 386 kb/s   mediainfo file.flv | grep Duration Duration : 39mn 43s   This what close, but it's not so accurate, 2383 is 39.71 minutes   ffmpeg -i file.flv 2&gt;&amp;1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,// | sed 's@\..*@@g' | awk '{ split($1, A, ":"); split(A[3], B, "."); print 3600*A[1] + 60*A[2] + B[1] }' 2383
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I am wondering how to use ffmpeg to create video thumbnails something like this (taken from a VLC forum):  I know totem can do this but totem does not support the video format that I am using  says that ffmpeg can do it.
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I would like to use  with a video.  With ffmpeg I can export some (.jpeg) images from a video. Can I convert a .jpeg into a valid .tiff or export directly .tiff images from the video with ffmpeg?
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When you start a YouTube video, there's a light grey bar which indicates the loading of the video. When I replay the video (by clicking the 'replay' button or by clicking somewhere random on the horizontal play line), why does the video load/buffer again?  It never used to be like this, but recently I've noticed that for some videos this problem occurs. Does anyone else experience this?  I tried on both Chrome and Firefox in Windows 7.
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I installed Ubuntu 16.04 and installed dolphin (15.12.3) + FFMpegThumbs so that I can see thumbnails of videos but when I went to the previews the box was just blank.
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I am using ffmpeg to get the meta info of an audio clip. But I am unable to grep it.      $ ffmpeg -i 01-Daemon.mp3  |grep -i Duration     FFmpeg version SVN-r15261, Copyright (c) 2000-2008 Fabrice Bellard, et al.       configuration: --prefix=/usr --bindir=/usr/bin        --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib       --mandir=/usr/share/man --arch=i386 --extra-cflags=-O2        ...   I checked, this ffmpeg output is directed to stderr.  $ ffmpeg -i 01-Daemon.mp3 2&gt; /dev/null   So I think that grep is unable to read error stream to catch matching lines. How can we enable grep to read error stream?  Using  link, I redirected standard error stream to standard output stream, then grep worked.  $ ffmpeg -i 01-Daemon.mp3 2&gt;&amp;1 | grep -i Duration   Duration: 01:15:12.33, start: 0.000000, bitrate: 64 kb/s   But what if we do not want to redirect stderr to stdout?
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I am recording videos on iPhone and uploading them to my Linux server. Users can see these videos on website. If users are seeing videos on mac or iDevices the video is looking fine but when users are seeing that video on windows systems these videos are getting rotated.   I am assuming this is because of some apple's flag in the recorded video which Windows systems are not able to read. Can I record videos in some way so they don't get rotated on Windows systems? Or is there any way I can re-encode videos with proper interface orientation using FFmpeg?  I am open to both FFmpeg or iOS way.
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I have 15 video files which I want to merge with ffmpeg. I want to save time by merge all of the video files in a single command line, not cut it one by one and merge it. Thanks.
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This title could be somewhat misleading, so let me explain ...  I'm downloading a video file ... mpeg, avi - being one of the popular formats. Now, if I am downloading it, and the download breaks in the middle of the uhm ... download, then, for example, Windows Media Player will give out some error and refuse to play it (although the file is, let's say, 98% complete). But, players like KMPlayer, or MediaPlayer Classic will play it up until that point (as the matter of fact, they can play it while it is being downloaded as well).  So, I'm interested, ... without using any means of download (download managers and alike) to secure the file is completely downloaded, how can one verify whether the video file is downloaded whole, and that it is complete ?