Questions tagged [ffmpeg]
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 program for transcoding multimedia files.
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Problem converting TS to MP4 container with ffmpeg
I have a video stream I captured with VLC and saved as a TS file. The codecs within the file are h.264/AAC, so I thought it would be trivial to use ffmpeg to convert the file from a TS container to ...
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1answer
3k views
Concatenating split media files using “concat protocol”
I'm using the latest ffmpeg (3.2.4) on 64-bit Windows 10.
My devices generally split up the files it saves to the SD cards, either with a 2G or 4G file size limit.
Before importing the files into my ...
2
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1answer
640 views
Join 2 videos to play at the same time
Let's say that I have a file1.avi and a file2.avi. Each one of these files is the same size, for instance 300x100.
How could I join them, so that both of them would play the first 10 seconds of each ...
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695 views
Is ffmpeg the solution to automate video building from multiple files
Need some help automating video & audio stitching and could use some help/direction.
Let's say I have the following assets:
Video 1
Video 2
Video 3
Music 1
And I want to build a few variations ...
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1answer
24k views
Encoding videos for MPEG-DASH
I read this article on encoding for MPEG-DASH, which has helped me a little and then follow up article.
My end goal is to create a batch file that can read in a directory of MP4 files, and then ...
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VOB editing with FFMPEG
I read that it is better to extract from vob H264 files within a .ts to have a lossless and more accurate sample, easy to cut, is that correct ?
I used these commands :
ffmpeg -i VTS_01_1.VOB -...
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3answers
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Using ffmpeg to cut out a scene by original timestamp
I have a recording (a simple, unprocessed TS from my satellite receiver, not encrypted) that has uneccessary stuff at the beginning and the ending. I want to cut out the main feature now with ffmpeg.
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1answer
2k views
Using a 265 encoded video with a container
Let me start by saying I'm not a video production guy. I am a programmer so I'm in over my head in certain areas. I've been trying to use ffmpeg to mess around with HEVC encoded video.
I was told it ...
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1answer
206 views
How to convert video for viewing on Sony Ericsson C702?
I'd like to convert some of my videos for viewing them on Sony Ericsson C702 cell phone. But I couldn't find the right set of parameters (a/v codecs, container, etc.). I'd prefer a solution using ...
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2answers
257 views
Is CABAC encoding lossy or lossless in ffmpeg?
I've been looking into how to compress a video using ffmpeg when I stumbled across CABAC encoding which I could specify by using the libx264 for the video codec and pairing it with the proper ...
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Trim audio stream to video stream length
I have an mp4 file (converted from an mkv file) that has a longer audio than video stream. This file doesn't play back nicely in my media streaming app (or MPC-HC) when I reach the end of the file.
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Long video clip stabilization with ffmpeg and vidstab
I'm learning how to use ffmpeg to stabilize some footage I shot at a conference (my setup had a nasty wobble and I didn't realise how bad it was until I started editing).
After trial and error I ...
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What is the correct format of media creation time?
I noticed my GH5 via ffprobe has metadata such as:
Metadata:
creation_time : 2018-12-31T09:17:48.000000Z
timecode : 06:19:42;19
This is actually my local time, so off that bat, ...
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1answer
4k views
ffmpeg - Stretch 4:3 video to 16:9
I have a video track that is a 4:3 video with pillarboxing/black bars on the side making it a 16:9 video. The resolution of the video is 960x540 (16:9).
How would I remove the blackbars and then ...
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2answers
582 views
Lossless color compression
I need to reduce the file size of an mp4 video. I don't need color information at all but pixel brightness resolution must be preserved. Videos consist of white background with a few (important) black ...
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1answer
4k views
Using ffmpeg to convert to Photo Jpeg with minimal loss of quality
I've a 30-second clip, which is HD 1080p, 30fps, "Photo JPEG" compression, 480MB.
I've brought it into Fusion 9, made a small change, and rendered: but the Saver options (under Quicktime) are either ...
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1answer
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Why isn't using ffmpeg to create a 2x2 video “mosaic grid” working for me?
On my Windows 7 PC, I've used Windows Live Movie Maker and Windows Media Encoder extensively to make and edit videos (I've also used other software like "Showbiz", "Super C" and "AVIdemux"). Recently ...
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1answer
5k views
FFmpeg hardware cuda decoding and overlay picture
I can overlay a picture to the video stream with the following command:
ffmpeg -thread_queue_size 1024 -i udp_source -i watermark.png
-filter_complex "[0:v]scale=1920:1080,yadif=0 [base]; [base][...
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2answers
319 views
How to calculate the overhead of wrapping multiple elementary streams?
I run a web service which muxes multiple elementary streams (e.g., H.264 + FLAC) into a single matroska container/wrapper/file. There is no transcoding as I only copy the streams, using a process like ...
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1answer
6k views
Extract all audio channels as separate wave file from a multichannel file
I have this file, and would be cool use ffmpeg for extract all audio channels to separate files..
I know how to extract a single channel at time in a way like:
ffmpeg -i input.mov -map 0:1 -c:a copy ...
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1answer
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encoding with ffmpeg libx265 -pix_fmt gray gives unplayable vid
What am I missing?
I encode an old black and white film clip with ffmpeg libx265 passing -pix_fmt gray. The output is unplayable in both vlc and mplayer (linux), so I assume I'm missing something...
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1answer
3k views
How to add a time stamp using ffmpeg to a screenshot capture of a video
I am trying to output a screenshot of a video at an specified time and the resulting picture should have a black square with the time that was given initially.
So far I was only able to produce a ...
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1answer
473 views
What does it mean “This filter supports the following commands”?
In the FFmpeg Filters Documentation some filters have a subsection "Commands" which begins with the sentence
This filter supports the following commands:
e. g. in the section 6.68 volume.
Filters ...
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978 views
Ffmpeg gui tool to apply filters
Are there any GUI applications (linux or windows) that allow you to apply ffpmeg filters to a video and observe the changes in a preview in real time?
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Why when you specify a video bitrate with ffmpeg does the resulting files displayed bit rate differ?
I'm fairly new to transcoding.I've been generating some mp4's from mxf files.
I've been playing around with some settings on ffmpeg and been specifying various bitrate's for audio and video with the -...
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1answer
6k views
How to concatenate multiple videos with ffmpeg?
Need to:
concatenate 3 mpg4 video clips (each around 1 minute long, and 800x500 size) + background mp3 -> into a 1-minute long (1920x1080) video composed of the first 20 seconds from each of the 4 ...
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2answers
3k views
What deinterlacing filter should I use to encode/compress a PAL MPEG-2 576i 25fps raw file?
I have a PAL MPEG-2 576i 25fps raw capture (presumably either straight from satellite or a DVD recorder) that I would like to encode to AVC. I'd like to deinterlace the file during compression with ...
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1answer
6k views
FFmpeg BMP to YUV x264 color shift
When I encode a particular sequence of BMP image files to AVC/H.264, the colors get shifted. Why does this happen?
But if I convert the BMPs to PNGs before running ffmpeg, the video conversion ...
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1answer
177 views
Joining / Concat DNxHR HQ *without* re-encoding
is it possible to precisely concatenate multiple DNxHR (HQ) videos into one without re-encoding?
It seems that ffmpeg can only handle MPEG streams.
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Changing the input frame rate of a series of images in FFmpeg
I am attempting to animate a series of PNG images at 30 frames per second (and add an audio track) with FFmpeg.
On the command line, I specify the input and output frame rates as 30 fps.
ffmpeg....
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1answer
814 views
ffmpeg statement for Anaglyph of Red-Cyan Color
I'm trying to take two input videos (can be in avi, mp4, whatever ffmpeg supports) and combine them into a stereoscopic video with the "ffmpeg" utility that uses simple red and cyan colored glasses (...
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1answer
2k views
ffmpeg - mapping an audio file with 2 channels to a video file?
I have a video file and an audio file (that contains 2 channels) and i want to map the video to stream 0 of the resulting file and the audio file to the next stream/s.
Since the audio file has 2 ...
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1answer
1k views
Matroska format's framerate is not accurate with certain values
If the Matroska format is used, in certain framerates it doesn't record at exact input framerate, but rather at a little higher than the input framerate.
As an example:
ffmpeg -video_size 1920x1080 -...
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FFMPEG duplicates the first frame when encoding
Using ffprobe shows that both videos have the same framecount, still if I extract the frames as images the compressed one has an extra frame at the beginning (which is just the duplicated first frame)....
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2answers
4k views
Loop and mix audio on video
I want to mix audio on a video.
The video already has audio stream in it. I'm adding another one.
The new audio I'm adding is shorter than the video. So, I want to loop it as long as the video lasts.
...
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1answer
2k views
Convert resolution 4096x2304 to 3840x2160 keeping the quality the same
I have recently come into possession of a couple of 4k movies with a resolution of 4096x2304. Unfortunately my Samsung 4k TV wont play anything over 3840x2160.
I have managed to re-encode the videos ...
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1answer
441 views
Video with inconsistent exposed / rendered image sizes
I have an interlaced video with MTS file format, which was captured using a HD camera.
When I play it using VLC, it is displayed at resolution 1920x1080 and if I take a snapshot with VLC, the saved ...
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2answers
1k views
avconv converting videos in really bad quality
I have this linux command line app called avcon. It is used to converting files. For instance if I have a file called video.mp4 I can run avconv -i video.mp4 video.ogg and it will convert this video....
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1answer
3k views
How to get FFMPEG output the same quality as Vimeo?
I like Vimeo, but I rather host a player and video myself. So I was wondering if someone knows how to get the closest result to Vimeo quality, but from FFMPEG?
It seems that Vimeo uses 1280 pixels ...
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1answer
4k 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 ...
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1answer
456 views
ffmpeg framemd5 format explanation
Does a frame consist of audio and video or just video? I am trying to verify if this can be used for confirming both audio and video data were successfully sent or if I need to handle the audio ...
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1answer
109 views
Is it possible to use ffmpeg to move part of the video to another position and crop the video at the same time?
I have a video file let's say it's the following one.
What I want is the following operations:
Copy the part in the red rectangle to the bottom-right corner for the whole video.
Remove the left red ...
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1answer
991 views
.srt subtitles added to mkv with ffmpeg are not displayed
I try to add .srt subtitles to the mkv file and it doesn't work.
I use the following very simple command:
$ ffmpeg -y -i original.mkv -i sub_original.srt -map 0 -map 1 -c copy ~/temp.mkv
ffmpeg ...
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1answer
262 views
Editing/Changing Cluster Timecode Element in mkv files (Amazon Kinesis Video)
I've tried researching this very thoroughly, but have not come across a similar issue.
To sum up my problem first, I'm sending 3 second .mkv clips into Amazon Kinesis Video. Then I pull back random ...
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1answer
72 views
How to re-order the .wav file channels
I need to change the order of channels in .wav file. for example if .wav file contains 16 channel like
"1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16"
then need to change this order to
"14 15 16 1 2 3 ...
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1answer
11k views
ffmpeg thread_queue_size warning: What does this mean?
*Edit: changing the render to -preset veryfast will no longer display the warning message. I also noticed that the video itself for the versions where the warning displayed had the last few minutes ...
2
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1answer
840 views
ffmpeg operations yielding changing fps values
I have a video that was rendered as 26.51 fps h.264 into an mkv by my video editor. Calling the file up in ffmpeg it displayed this file as 1k fps, 26.51 tbr.
When I applied an operation to separate ...
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1answer
154 views
Is there any difference between changing video containers with ffmpeg vs just renaming with windows?
For example say I use the command:
ffmpeg -i input.mkv -c copy output.avi
(In my case I need to add -bsf:v h264_mp4toannexb)
Well I can also just copy and rename the file from input.mkv to output....
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1answer
707 views
Improve performance on 4 x 4K mosaic with FFmpeg
I'm using a NVIDIA Quadro P4000 and my config is Intel i7 2.4 GHz with 8 Go of RAM. I'm working on Ubuntu 16.04, I've installed NVIDIA drivers using apt repo aswell as CUDA. I'm using FFmpeg in ...
2
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1answer
429 views
FFmpeg mosaic with hardware acceleration on Quadro P4000
I'm currently trying to achieve a mosaic including 4 videos using FFmpeg and hardware acceleration.
I'm working on Ubuntu 16.04, I've installed NVIDIA drivers using apt repo aswell as CUDA. I'm using ...
