Questions tagged [ffmpeg]
Media tool with support for multiple codecs, filters, and containers. Include your actual command and the complete console output when asking questions involving FFmpeg tools. An easy way to do this is by adding `-report` to your command and pasting the contents of the logfile generated. For help with CLI use only of ff* binaries - ffmpeg, ffprobe, ffplay. For help with API usage, post on Stack Overflow.
2,992
questions with no upvoted or accepted answers
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Extracting Opus from WebM losslessly with FFmpeg or MKVToolNix
I have come across a strange problem when remuxing Opus audio stream from WebM to another container like ogg or opus.
Running the output files through a spectrum analyzer clearly shows that there is ...
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11
votes
1
answer
6k
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Combine/concatenate multiple MP4 files, making each file into a chapter
I am looking to use handbrake to combine 43 short mp4 files into one larger file. However, I want to ensure that the start of each file is recognized as a chapter. I'd be using vlc to play the file.
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10
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1
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How can I compress video by taking advantage of its static content?
I have an HD video that is a presentation, so it consists mostly of still images. It's a 50 minute, 200MB MP4 file, downloaded from YouTube.
Is there a way to take advantage of the static nature of ...
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9
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0
answers
4k
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Injecting 360 video metadata with ffmpeg
I'm working on a library that injects/embeds/writes metadata into a .mp4 file to allow the video to be displayed correctly as a 360 video. The input file is a standard .mp4 file in the equirectangular ...
- 191
9
votes
0
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Trying to remove 1152 samples, but the queue is empty
I am streaming mp3 files,using this command :
ffmpeg -re -i 'INPUT.mp3' -map_metadata -1 -map 0:0 URL
I create a loop which stream files,and there is no problem with reviving stream,just from server ...
- 193
8
votes
1
answer
882
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IE will not seek audio/webm file
I'm trying to create a WebM audio file that will play back and seek in all browsers using the HTML5 <audio> tag and MIME type audio/webm. I've found workarounds to get this to work in all ...
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7
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0
answers
11k
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ffmpeg: "moov atom not found" on a seemingly valid file
GoPro cameras cut up video in 4GB MP4 files.
Attempting to merge them with ffmpeg 4.4.1 like so:
ls GH017642.MP4 GH027642.MP4 | while read line; do echo "file '$line'"; done | ffmpeg -...
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7
votes
1
answer
4k
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How to copy unsupported data streams with ffmpeg?
Briefing
I have some .wmv files (actually, my full batch file deals with multiple filetypes) with weird data streams that are needed for an external program to recognize them.
I'm trying to remove ...
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7
votes
0
answers
14k
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How to utilize all cores on high-end CPUs using ffmpeg
I have a high-end HPE ProLiant DL325 G10 server with an AMD EPYC 7401P 24-core/48-thread CPU, 128GB DDR4 RAM, and a Intel P4800x PCIe NVMe. I tried to run ffmpeg to convert a video (MKV) to MP4 for ...
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6
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0
answers
216
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How to correct Hindi text rendering when using FFmpeg?
I have a FFmpeg script to add some Hindi text to the MP4 video file.
The FFmpeg command looks like this
ffmpeg -i template_video.mp4 -filter_complex "drawtext=text='नमस्कार जी मैं हूँ':fontfile=...
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6
votes
0
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3k
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Android TCP error failed to resolve host name from static library
I'm using ffmpeg on android and i have encountered and error, that does not occur when i'm using the library on my linux VM.
I'm using FFmpeg Static Builds, from here.
I am using the stable 3.1.5 ...
- 161
6
votes
1
answer
3k
views
Convert png sequence to x264 with ffmpeg
I am trying to convert a series of pngs into an mp4 video. I am using ffmpeg, and want to encode the video with the H.264 codec. Using the command
ffmpeg -y -r 30 -b 1800k -i _tmp%04d.png -vcodec ...
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6
votes
0
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Stream video with FFMPEG, "Output file does not contain any stream"
I would like to stream an H.264 encoded elementary stream wrapped in RTP headers to a port using FFMPEG.
I have tried the following command lines to no avail...
ffmpeg -i 1080p_1.h264 -f rtp -vcodec ...
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5
votes
0
answers
491
views
It is possible to use QTGMC deinterlacing with FFmpeg?
I'am using the media-autobuild_suite (on Windows). This tutorial describes how to install and use QTGMC with AviSynth+. My question is can one use FFmpeg only to deinterlace video files with QTGMC?
...
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5
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0
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Using ffmpeg, is it possible to convert a blu-ray folder to a MKV file and add chapter titles in one go?
From time to time, I have to convert the files which are referenced by a playlist from a blu-ray disc to a MKV file. I normally use ffmpeg under Windows in a command line like the following:
"C:\...
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5
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0
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268
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Access microphone with gphoto2
There is a lot of documentation for using gphoto2 to use a DSRL as a webcam. With those techniques, the system sees the camera as a new video device
gphoto2 --stdout --capture-movie | ffmpeg -i - -...
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5
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0
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3k
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Broadcast a screen with ffmpeg via http
These quarantine days I was going to share my desktop to friends to explain them what is git in a practice. The problems are:
I use FreeBSD.
We are behind NATs. But I've got a VPS with VPN (Wireguard)...
5
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0
answers
2k
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Extract Mime Type codecs for MediaSource using FFprobe
I have to extract the codecs e.g. 'video/mp4; codecs="avc1.42E01E, mp4a.40.2"' for the MediaSource API. How can I do this strictly with FFprobe/FFmpeg tools? Do not suggest other tools please.
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5
votes
1
answer
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How To Stop Cmd Window From Scrolling Down Automatically
I'm making a batch file that runs some ffmpeg commands. When ffmpeg is encoding, it shows you the progress of the encode, updating it every second or so.
The problem is that sometimes I want to ...
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5
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0
answers
2k
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How to copy not recognized streams on conversion with FFmpeg?
I am trying to compress some Videos using FFmpeg, that contain multiple streams, some of them not recognized by FFmpeg:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'GX010686.MP4':
Metadata:
...
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5
votes
1
answer
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ffmpeg meets unknown timestamps error
I use ffmpeg concat to merge multiple ts files, I use following command
ffmpeg -y -f concat -i filelist.txt -c copy output.mkv
all ts files' path is put in filelist.txt, most of time it runs well, ...
- 115
5
votes
0
answers
1k
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Keep equirectangular side-data when using video filter on 360 Video in ffmpeg
I have a 360° Video and want to shift it sideways using ffmpeg so that the default viewpoint when opening the video in a player is shifted. I found this question (How to offset a video horizontally in ...
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5
votes
1
answer
8k
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Generating a video with FFmpeg starting from a sequence of PNG snapshot creates black video output
When I generate a video starting from a sequence of PNG snapshots, the output video is black.
Here is a minimal working example: I generate the video from these two frames with the following command ...
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5
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0
answers
602
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ffmpeg concat transition of images
I would like to make transitions via concat with ffmpeg for a slideshow. In my case the number of images is often changing. Is there a way to use concat to set the transition or can i define a ...
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5
votes
0
answers
2k
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How to make FFmpeg wait for input
I have a program which saves game play in a file. I want to run FFmpeg and give the file as input for live streaming. Below is how I use FFmpeg to stream the video file.
%ffmpeg% -re -i %fileloc%%...
5
votes
0
answers
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How to know which framerate should I use to capture webcam with ffmpeg?
I'm capturing video from my webcam with the following command:
ffmpeg -r 30 -f v4l2 -video_size 160x120 -i /dev/video0 output.avi
The -r option indicate the framerate I want. However, it's not that ...
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5
votes
0
answers
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What ffmpeg command line matches the one YouTube uses?
I am trying to use the same command line YouTube uses for quality etc. in H.264/MP4 containers. I have been working on converting videos into multiple formats, scales, sizes and adjusting the bit ...
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5
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0
answers
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FFmpeg mp3 file header restore
I got mp3 files without headers, ffmpeg -i shows:
. . .
[mp3 @ 003e9700] Header missing
. . .
They sound well, but not in all players. So how can I restore header info or re-pack file without re-...
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5
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0
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3k
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ffmpeg speed up video but keep same quality
I made a timelapse out of an image sequence using ffmpeg and the copy codec to disable compression and keep the quality to a max. The timelapse is a bit too long (10 minutes and up) so I tried to use ...
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5
votes
0
answers
910
views
Adding audio to video being created with image2pipe option
I am creating a video in mp4 format from a sequence of images and an MP3 audio file.
For performance reasons I switched from image2 option to image2pipe option and now video is creating OK but without ...
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5
votes
0
answers
2k
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How to properly concaternate two audio files together?
I ripped two Blu-rays and I'm trying to combine the audio from both into one file. I've decoded it from DTS-HD MA to Wave64, and I used avisynth to remove the black screen audio (4 seconds) from the ...
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5
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0
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Use FFMPEG for Video to Frames, then Frames to Video with Original Sound
Is there a way to use FFMPEG to decompose a video into individual image files, and then reassemble those image files into a video with the audio from the original video in sync with the new video ...
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5
votes
1
answer
2k
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Is there a way to make FFmpeg seek faster to an end of file on a network share?
I'm using ffmpeg to generate image previews from flv videos. The OS is Debian 5 and it's the apt version of ffmpeg. The flv files are located on a NAS share that is mounted as NFS. Getting the ...
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4
votes
0
answers
5k
views
how to fix mp4 file with missing moov atom?
I have a video file (mp4) and I want to load it in a video editor. However, it shows an error which says, "file format not recognized." So, I used the file command and the output is just ...
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4
votes
1
answer
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Cut off from beginning to key frame using FFMPEG
How to cut away a piece at the start of video from beginning to the next key frame?
I know the -ss option
ffmpeg -y -noaccurate_seek -ss 00:00:30 -i "%%~ni.mp4" -avoid_negative_ts make_zero -...
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4
votes
0
answers
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How do I make FFPLAY automatically skip ahead while playing a stream without distorting audio?
I've been a long time lurker, but now I've gone and made an account.
Like I said in the title, I want to play an SRT stream with FFPLAY, but whenever a drop in the connection happens, I need it to ...
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4
votes
0
answers
935
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How do I create a lossless screencast using Fedora and Wayland?
Environment:
Fedora 34, 5.12.13-300.fc34.x86_64
FFMPEG 4.4-4.fc34
GNOME 40.1.0
What I am trying to do:
Create a lossless screencast file (video only, audio not required) that can be used as a source ...
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4
votes
0
answers
759
views
Change the speed of subtitles in an srt file
I have a set of videos that were recorded at 25 fps. That was the original speed of the video and I want to keep it that way. The video and audio work fine.
I have a corresponding set of subtitle ...
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4
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0
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3k
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How to find dropped/duplicated frames in a video file?
I have some videos files where a few frames were missing. I can verify that by playing it in a video player and advance frame-by-frame, or by extracting all frames with ffpeg then check the output ...
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4
votes
0
answers
640
views
Reset metadata for a specific stream only
In my usecase I'd like to recode audio streams into a different format with ffmpeg. The source files (MKV) contain a video stream, two audio streams and three subtitle streams as well as chapters. ...
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4
votes
0
answers
7k
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Error splitting the input into NAL units, corrupt video?
I am trying to play this video I downloaded it via youtube-dl.
$ youtube-dl --verbose -c -f 22 SYahi3XFEa4
[debug] System config: []
[debug] User config: [u'-f', u'bestvideo[height<=720]+bestaudio/...
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4
votes
0
answers
157
views
Is it possible to find piece of audio inside of mp3 file?
We have a community radio and we are recording all shows 24/7. And we are wondering is there any way to automatically trim those recordings so that all commercials and unwanted parts are cutted off ...
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4
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0
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How do I continuously stream multiple .mp4 files with ffmpeg to an rtmp server?
I am an Software Engineering trainee and I need to make a video stream that continuously streams several videos on repeat.
I have made an rtmp server using nginx and their rtmp module and as ...
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4
votes
0
answers
376
views
Hindi matra misplaced in subtitles burned with ffmpeg
When trying to burn in subtitles, I get
incorrectly shaped subs, when the text should have actually read कहानियों के बारे में
The command was
ffmpeg -i ~/in.mp4 -y -vf subtitles=~/hindi.srt:...
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4
votes
0
answers
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views
How to use libx264 ffmpeg in conda environment?
I tried to convert an avi video file into an h264 processed mp4 file, but I ran into the following error:
$ ffmpeg -i sa1-video-fram1.avi -c:v libx264 -crf 19 -c:a libfdk_aac -b:a 192k -ac 2 out.mp4
...
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4
votes
0
answers
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Strip x264 copyright information during ffmpeg copy
I am trying to remove the copyright string from the generated mp4 file using ffmpeg (copyright string is already present in avi file).
I have an input avi which I'd like to make 'streamable' and ...
- 1,309
4
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0
answers
7k
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How to remap channels of AC3 stream within .mkv or .mp4? (ffmpeg, 3f2m/lfe - > 3f2r/lfe)
So this is my problem, I've backed up quite a number of DVDs and a few Blu-Ray discs to .mkv files for archival purposes, and for my plex server. I used:
x264 for video
ac3 for audio (for ...
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4
votes
0
answers
3k
views
Send cookie with ffmpeg input
I currently have a cookie.txt file that looks like this.
# Netscape HTTP Cookie File
# http://curl.haxx.se/rfc/cookie_spec.html
# This is a generated file! Do not edit.
.youtube.com TRUE / ...
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4
votes
0
answers
2k
views
Time of extracted frame from video using FFMPEG
I'm using the command
ffmpeg -i video.webm -vf fps=1 thumb%04d.jpg
to get one frame every second. However, I cannot figure out way to get the exact timestamp of an extracted frame. I need that ...
- 41
4
votes
0
answers
2k
views
How do I extract a QuickTime text track using FFMPEG?
I have a .mov container with a QuickTime text track which QuickTime uses to display chapter markers. In the QuickTime 7 Pro User's Guide, the description for how to do this is in Editing and Authoring ...
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