FFmpeg is a free software project that produces libraries and programs for handling multimedia data. The most notable parts of FFmpeg are libavcodec, an audio/video codec library used by several other projects, libavformat, an audio/video container mux and demux library, and the ffmpeg command line ...

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109 views

How to keep audio and video in sync?

I have a few videos I have to convert for a website. They are PowerPoint slides with a narration track over top. The originals I have to work with are in m4v format. I have converted them to mp4 and ...
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23 views

Is it possible in FFMPEG to change scale over time?

Ok, so using the overlay filter, one can change the x/y location of a video over time by using the "t" variable. For example, overlay=x='if(gte(t,2), -w+(t-2)*20, NAN)':y=0 can be used to start ...
2
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33 views

Unable to concatenate videos due to identical MOOV atoms

I am cutting out segments from a long mp4 file and then rejoining parts of them. However, since FFMPEG apparently keeps the same MOOV atom for the trimmed files as the original, it looks to FFMPEG ...
2
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334 views

Video Capture using ffmpeg (V4L2 indev) Results in Bad A/V Sync

I actually contributed to a bug report on this issue a year and a half ago ( https://trac.ffmpeg.org/ticket/692#comment:15 ). Basically, the problem is that using ffmpeg to record from a USB video ...
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0answers
68 views

segment does not contain sync frame

Whenever I split a video using Apple's mediafilesegmenter, using the following command: medifilesegmenter video.ts -t 10. I get the following error for each segment except the first: segment does not ...
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30 views

ffmpeg-php with fixed width and height and without stretch or squish

Hi there I googled for hours but no success to solve... This code works for me exec("ffmpeg -i $SourcePath -ar 22050 -ab 32 -f wemp -vf scale=500x400,setdar=16:9 $uploadpath1 2>&1"); but ...
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208 views

restart encoding with ffmpeg when bad source

I have an ffmpeg process which saves a stream from wowza server, but when the stream in wowza is interrupted for a second or so sometimes ffmpeg cycles in: [segment @ 0x671a10] st:0 PTS: 9600015 DTS: ...
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34 views

Set ipad compatible thumbs for mp4 videos based on a frame of the video with command line

I have a directory of 100 mp4 files. All are working well on my ipad but most of them do not have a working thumb. I want to generate these thumbs with a command line command (on macosx) based on a ...
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289 views

Lossless Editing by Combining Clips with FFmpeg x264

My new Canon Vixia HF G30 video camera has an option to encode directly to 35 Mbit/sec Mp4 at 1080p60 and it does a nice job. I primarily use it to record my daughter's high school basketball games. ...
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514 views

High bitrate in AVCONV converted MPG file causes DVD reading problem

I convert AVI to MPEG with folowing command: avconv -i file.avi -c:v mpeg2video -b:v 6000k -c:a mp2 -b:a 384k file.mpg When the MPG file has been burned to DVD it is hard to read afterthat. The DVD ...
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299 views

ffmpeg - convert video to iDevice format, replace sound with normalized WAV file, while maintaining the original video quality?

I'm using this command line to extract the audio $ffmpeg -i video.mkv -c:a pcm_s16le audio.wav this is its output ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers built on Oct 1 ...
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27 views

Putting a Lower bitrate of my video stream in my current mp4 container

Sorry if my question is too noobish, this is my first question. What I have is: An mp4 movie with a video stream and an audio stream. What I want in the output: Is an mp4 file containing: the same ...
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60 views

ffmpeg capture audio in raw format

I would like to capture audio with ffmpeg in .raw format. Here is what I do to capture in .mp3 format : ffmpeg -f dshow -t 10 -i audio="virtual-audio-capturer" -y "sound.mp3" note that I don't want ...
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24 views

Converting container or transcode movies to iPhone from command line (os x)

Over the years I collected many movies in different container formats (avi, mp4, mkv) and encoded with different codecs too. Now want convert containers (or transcode them if absolutely necessary) to ...
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35 views

ffmpeg output does not play

I'm trying to transcode an uncompressed AVI ~27GB in size to an MP4. I'm using the following command: ffmpeg -i input.avi -c:v libx264 -preset slow -crf 20 -c:a copy output.mp4 The resultant MP4 ...
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169 views

Get original timecode from DV avi and use it with ffmpeg

With FFMPEG (on Ubuntu linux pc) I am trying to draw the original timecode from DV avi file (captured from miniDV cassette with EDIUS 4 and 5 in Windows) to an output mp4 file. For my script I need ...
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90 views

Where to start Transcoding with FFMPEG?

I would like to learn a lot about Transcoding video files with FFMPEG from any format to mp4 (hH264/AAC) format. We have a large repository of video files ranging from 1 MB to 2 GB of various formats ...