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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36 views

ffmpeg Color conversion - 709 to 601

I am downscaling an HD movie from 1920x1080 to 720x576 and want to make sure the color conversion is done correctly, which with my current settings I am sure it is not. I am coming from an HD Prores ...
2
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1answer
152 views

Lossy output with FFMPEG JPEG 2000

I'm trying to achieve a lossy JPEG 2000 output with FFMPEG, but no success so far. Using this command line: ffmpeg -i input.dpx -pix_fmt yuv420p -vcodec libopenjpeg output.jp2 As a result I get ...
2
votes
1answer
100 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 ...
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121 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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0answers
39 views

How to display static image if the input stream ends using ffmpeg?

I am receiving a stream over the network with the following ffmpeg command: ffmpeg -i rtmp://server:port/input.stream -f flv rtmp://server2:port/output.stream When the input stream stalls, I want ...
2
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0answers
85 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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0answers
18 views

What is the ffmpeg filter equivalent of “Automatic levels” for colors?

Looking at the documentation about filters there seems to be a curve filter to manipulate color with the following presets: color_negative cross_process darker increase_contrast lighter ...
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0answers
22 views

Any m2ts optimizer under Linux?

My goal is to optimize m2ts generated by ffmpeg for HLS because the generated m2ts has lots of structural overhead. The below is an example of the result analyzed by Apple Media Stream Validator: ...
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0answers
10 views

Is there a way? multiple images to looping video via ffmpeg?

I want to use ffmpeg to create a 15 second looping video from images for posting to instagram. For instance: Camera takes 3 pictures Each image plays for 2 frames (3 images = 6 frames) After 6 ...
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0answers
42 views

FFMPEG Sync Audio & Video From Pi Camera & USB Microphone

Posted this in the Raspberry Pi community, but it got closed for being off topic. Reposting in the hopes that it is now in the right place. I am trying to stream low-quality audio & video from my ...
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0answers
65 views

ffmpeg filter_complex problem

I'm trying to achieve complex effect with ffmpeg, but I seem to be failing the syntax of -filter_complex somewhere. The goal is to capture part of the screen (with UScreenCapture direct show device) ...
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0answers
138 views

The ffmpeg`s filter_complex blend respecting overlay`s alpha channel

I need to blend an video with an semitransparent png like this: [1:0][0:0]blend=all_mode=average Seems like the transparency of png is ignored. What I missed? How to make the ffmpeg to respect ...
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0answers
38 views

How to get ffmpeg/x264 to use same parameters as input?

I'm trying to accomplish a smart rendering workflow using ffmpeg/x264. In short, get ffmpeg to segment the input file. Locate the segment(s) with changes to be made. Re-encode altered segments with ...
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0answers
165 views

How to transcode mkv media into different resolutions with ffmpeg

I am trying to setup a server that allows me to broadcast a single media file using ffmpeg to a ffserver so that I can use the RTP protocol to allow clients to view the media at different resolutions ...
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0answers
99 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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0answers
52 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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0answers
424 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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0answers
658 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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0answers
355 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 ...
0
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0answers
79 views

Switching between H.264 video streams on the fly?

I have several H.264 encoded MP4 files, as well as still images. From these I want to generate a single video stream that I can broadcast. The stream will be composed of alternating still images and ...
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0answers
306 views

Stream a dynamic playlist to a RTMP server

My goal is to stream a dynamic playlist of video to Twitch. The problem is while I stream a file, I don't know which will be the next until the end of the current one. My playlist is a very simple ...
0
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0answers
102 views

HEVC binary to MPEG 2TS

I'm trying to convert a HEVC bit stream to MPEG-2 TS using ffmpeg. However I can't seem to perform the task without a wrapper such as mp4. Here is the command I was trying. ffmpeg -i ...
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0answers
66 views

ffmpeg libx264 not working

have Installed ffmpeg and x264 based on this post : http://stackoverflow.com/questions/9764740/unknown-encoder-libx264 no errors receved. but when i want to convert an input stream from mumudvb to a ...
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0answers
42 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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0answers
94 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 ...
0
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0answers
69 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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0answers
59 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 ...
0
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0answers
118 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 ...