All Questions
1,037
questions
0
votes
0
answers
13
views
How do you create an ffmpeg lossless image without re-encoding?
I'm using the command below but not sure if it’s really lossless and without re-encoding? Is there specific command to create lossless image and without re-encoding? I'm new to this.
ffmpeg -lavfi &...
- 11
2
votes
1
answer
348
views
Why does crossfading audio files in ffmpeg produce just the last input?
I have two input files (track1.m3 and track2.opus) from which I want to extract four clips and crossfade them in sequence. I arrived at this command based on an answer from Gyan on Stack Overflow:
...
- 125
1
vote
0
answers
44
views
Ffmpeg webm YouTube settings command
Is there a .webm still image command in ffmpeg that is best compatible with YouTube I’m currently using:
ffmpeg -loop 1 -framerate 2 -i input.png -i audio.m4a -c:v libx264 -preset medium -tune ...
- 11
0
votes
0
answers
34
views
ffmpeg command to combine mp3 file and embedded album art image file metadata into a video
my below ffmpeg command works for combining 1 audio file with 1 image file into a video.
ffmpeg
-loop 1
-framerate 2 -i "C:\Users\marti\Videos\ig_sf_6.5.24_highlights\apple image.jpg"
-i ...
- 131
1
vote
1
answer
51
views
why don't work old batch ffmpeg extraestereo command in new version?
I use this batch command for years in ffmpeg, but from update to the last version don't work and don't see in documentation whats the problem.
ffmpeg -i C:\Pelis\video.mkv -vcodec copy -map 0:a -map 0:...
- 11
0
votes
1
answer
20
views
MKV Audio track stop playing
I have a show with two sources, Blu-Ray and DVD. Blu-Ray doesn't contain the correct audio language but DVD does. I want to add the DVD audio track to the Blu-Ray. So I have decided to rip them.
Using ...
- 1
0
votes
0
answers
56
views
Automatically synchronize two audio streams with ffmpeg
Say I have a video of a talk but the soundtrack is bad, and I happen to have an audio recording of the same talk made with a good mike. Is there a way, with ffmpeg, to replace the bad audio with the ...
- 137
0
votes
0
answers
64
views
Ffmpeg - Generate loudnorm conversion log file
I have a bat file that reads several audio files in the "µudios LUFS" folder and performs LUFS normalization by copying the files to the "Normalized µudios Lufs" folder.
I'm trying ...
- 663
0
votes
1
answer
82
views
ffmpeg creates out-of-sync and glitchy audio when using concatenate filter to cut segments of video
I have created an artificial test case where I want to have red + middle C, green + middle D, and blue + middle E each for 2.5 seconds, cut down to each for 1.5 seconds. This is a simplification of ...
- 1
1
vote
1
answer
159
views
How to fix MP4 file whose recording was terminated by TERM signal?
I want to be able to listen to the content already recorded. The file contains Opus stream in MP4 container and it is recorded from Internet using ffmpeg (4.4.2).
$ ffprobe -hide_banner file.m4a
[mov,...
- 353
0
votes
0
answers
31
views
Error initializing filters when trying to use arnndn
I’m trying to do noise reduction on an audio clip using the arnndn filter from ffmpeg:
ffmpeg -i audio.aac -af 'arnndn=m=mp.rnnn' audio_out.aac
but I keep getting the error
[AVFilterGraph @ ...
- 137
0
votes
0
answers
47
views
How to stream integrated camera to Facebook using FFMpeg
I'm currently using this command to stream to Facebook:
ffmpeg -f dshow -i video="HD User Facing":audio="Varios micrófonos (Realtek(R) Audio)" -c:v h264 -pix_fmt yuv420p -r 30 -g ...
- 1
0
votes
0
answers
145
views
Separating audio m4b file based on a cue file
Separating audio m4b file based on a cue file
How can I split an audio m4b into separate files using a cue file?
Note: The m4b file has no chapters that's why I need to use the cue file to split it.
I ...
- 153
1
vote
0
answers
56
views
How to achieve the same performance of Geforce Experience using FFMpeg screen capture
I have a NVidia card and currently use Geforce Experience to do screen capturing. GE performance is really excellent and even if I record a video in 4K, 60 FPS, and high bit rate, I don't experience ...
- 711
0
votes
0
answers
41
views
ffmpeg audio amerge with volume level adjustment and sidechain processing stopped working
I'm trying to merge my stereo background music with a mono voiceover audio with volume adjustment and sidechain processing to duck the music when voiceover is playing. This command used to work fine ...
- 1
1
vote
1
answer
58
views
How can I detect which channels contain compressed audio in a video file by using command line tools?
I have an MXF file that contains 16 audio tracks. I know the first two tracks (stereo) contain Dolby E compressed video. Using MediaInfo (gui) it lists 16 audio streams with a mix of Dolby E and PCM ...
- 11
1
vote
1
answer
428
views
Want to understand encoding with Opus for maximum audio quality in FFmpeg. Bitrate stuck at 96kbps?
I'm sort of new to FFmpeg, but I got much of the basics down. I am trying to understand how to encode audio with Opus. My knowledge is a bit weak when it comes to audio, bitrates, sample rate and Hz.
...
- 13
3
votes
1
answer
299
views
How to repair damaged AAC file without re-encoding using FFmpeg or other tools?
I have a 256Kbps AAC file that has a corrupted segment lasting less ~1/20th of a second. I'm seeking to "repair" the damaged portion without re-encoding - or, at least via a minimally ...
- 31
0
votes
1
answer
142
views
How can I detect which audio channels in a video file are silent using FFMPEG?
I need to be able to scan video files and report which audio tracks/channels are silent without knowing anything about the file's audio mapping ahead of time. I have tried this ffmpeg (v4.1) command ...
- 11
2
votes
0
answers
56
views
Yet another ffmpeg concat audio sync issue [closed]
I've read through dozens of posts, tried many suggestions, nothing seems to work for me. The funny part is that the video is fine in some players (e.g. Quicktime) but not the others (e.g. Chrome).
...
- 261
0
votes
0
answers
41
views
REPLAYGAIN value being ignored on some MP3's - FFmpeg Transcoder cs - process Error Data Received:454
I am having an issue per below. I use Windows, and just installed ffmpeg-2024-03-07-git-97beb63a66-full_build, which did not correct it.
I have added Track ReplayGain to my music library using Foobar.
...
0
votes
1
answer
105
views
Converting audio tracks only in mkv files to AC3
I have an LG CX TV. The internal video player does not recognise DTS audio format. I'd like to be able to play MKV files (which might have DTS audio tracks) from an external USB device. I was looking ...
- 1
0
votes
0
answers
107
views
Weird ffmpeg behavior - "-shortest" flag ends the audio too early
I'm trying to generate some video files using ffmpeg, but when I use the -shortest flag, I get a file whose audio stream is several seconds shorter than its video stream.
I tried several ...
- 101
-1
votes
1
answer
361
views
How to mute audio by looping the last second of every x seconds in the video?
UPDATE:
Баяр Гончикжапов and inspired by this post, tried:
ffmpeg -i input.mp4 -af "volume=volume=0:enable ='gte(mod(t\,20)\,15)'" -c:v copy -c:a aac -b:a 192K output.mp4
Post solved, thank ...
- 19
1
vote
1
answer
142
views
FFMPEG - How to Merge Three Files - Only Middle One Has Audio
I have three videos that I want to merge into single one.
Intro video (mp4) - 3 seconds - No Audio
Main video (mp4) - 1 minute - With Audio
End video (mp4) - 3 seconds - No Audio
When I use ffmpeg, ...
- 1,708
0
votes
0
answers
60
views
Adjusting volume levels with ffmpeg afade
I am having some trouble with the following ffmpeg command string:
ffmpeg -i 20s.wav -af "afade=t=out:st=2:d=1:silence=0.07, afade=t=in:st=5:d=1" out.wav
What I expect from this: At 2 ...
1
vote
1
answer
397
views
How to detect and reduce a WAV file’s sample rate to its real sample rate?
I'm not sure if my question makes sense, but here it is the problem I have.
I have a bunch of wave (WAV) files that I believe were converted from MP3 or some other format that I have no information ...
- 115
0
votes
0
answers
57
views
How to automatically convert zoompan filter's private fps to input video's fps?
I have a 24 fps video, I'm trying to use the zoompan filter in my video and I'm having trouble setting the filter's private fps. If you set the fps in the zoompan filter to fps=30, the video and audio ...
- 1
0
votes
1
answer
148
views
Complex ffmpeg multi-encode/streamcopy/muxing scenario: is this actually doable?
I'm trying to do multiple muxing/re-encode/copy operations on an input video with ffmpeg and have run into roadblocks with the methods I've tried; before I continue testing, I want to confirm whether ...
- 3
0
votes
1
answer
182
views
How to encode FLAC and DTS audio formats to AAC most efficiently?
I have been encoding audio for my own personal media library from various formats into AAC available for direct play on my Plex Server. I have been using the following command with ffmpeg:
ffmpeg -i &...
- 11
0
votes
1
answer
321
views
How to change the sample rate of audio for all video files in a directory?
I performed screen records using wf-recorder and I realized that it was hardcoded to encode at 44.1 kHz, but Pipewire defaults to 48 kHz. So it turned out the audio would be perfectly in sync if I ...
- 131
1
vote
1
answer
305
views
Using ffprobe to get count of audio streams in mp4 file
I am looking for a way to get a count of the number of audio streams in mp4 files. Among some big long threads (mostly pre-2019 dated) on using ffprobe for this I found the following command:
ffprobe ...
0
votes
2
answers
207
views
Analyze AVI for audio with ffmpeg
I'm new to using ffmpeg. I have some AVI files that I believe should have audio, but I cannot get the audio to play with VLC. I tried using ffmpeg to analyze the AVI files for audio.
import ...
- 125
0
votes
0
answers
190
views
FFmpeg: Adding a new audio into video and adjust volume of both audio
I'm trying to add a new audio file to the existing audio track in my video.
1. If the video is longer, I want the newly added audio to repeat throughout the entire video, but if the video is shorter ...
- 19
0
votes
1
answer
208
views
How to convert multiple .VTT segments to one single .VTT file or subtitle file?
I have a list of .VTT segments from a bunch of URLs for a stream looking like these (the total amount of segments is much higher):
https://drod24s.akamaized.net/all/clear/none/d9/...
- 11
0
votes
0
answers
51
views
MPEGTS across devices has choppy audio
I want to stream video and its audio between devices. On my pc I am transmitting it using
ffmpeg -re -i "video.mp4" -vcodec libx264 -f mpegts udp://192.168.1.106:1234?pkt_size=1316
And on ...
- 1
2
votes
1
answer
147
views
FFmpeg - Using Firequalizer filter based on duration
I try to use Firequalizer filter as audio equalizer in my video. I want the filter to be applied on the first 30 seconds of each minute in the video and disabled for the next 30 seconds. It will have ...
- 19
0
votes
0
answers
45
views
ffplay file.wav 18 audio channels
On Linux I have an 18 channel wav file that I can play with aplay or play(sox) without problems. The 18 channels are played well.
If I want to play it with ffplay I get this:
libavutil 56. 51....
2
votes
0
answers
66
views
How to know my audio codec will support the output container in. Fluent-ffmpeg [closed]
I am building a YouTube downloader. As YouTube doesn’t store high quality video with audio and store them separately so I have to merge them on server.
For merging I am using a Node.js server with ...
- 21
1
vote
0
answers
36
views
What is the typical workflow for running "multiple" FFmpeg commands? [closed]
For example, I have listed these out as possible commands so far:
# ogg to mp3
ffmpeg -i audio.ogg -acodec libmp3lame audio.mp3
# add audio to video:
ffmpeg -i audio.mp3 -i video.mp4 video_audio_mix....
- 387
0
votes
0
answers
41
views
Concatenated mp3 stop playing at 15s on some players (e.g. iTunes)
I have mp3 file and I can not figure out why it stops playing at 15s even thought it is 12 minutes long.
ffprobe returns:
Duration: 00:12:02.30, start: 0.023021, bitrate: 131 kb/s
I figured that ...
- 101
0
votes
0
answers
252
views
ffmpeg convert dvd vob to mp4 sometimes no audio
Using this cmd (from here : https://www.winxdvd.com/dvd-ripper/rip-dvd-with-ffmpeg.htm) to convert dvd vob files to mp4. (adjusting file names as needed)
ffmpeg -i "concat:VTS_01_1.VOB|VTS_01_2....
0
votes
1
answer
110
views
ffmpeg - converting one audio track of a multi-track mp4
I'm having a few mp4 with two audio tracks,
an english one in aac and a french one in dts.
Now I want to convert only the french dts to eac3 with a single ffmpeg command.
I use
ffmpeg -hide_banner -i ...
- 1
0
votes
1
answer
642
views
Convert mp3 with cue file to m4b with chapters
I have an mp3 and a cue file (with chapters) of a CD that I ripped. I want to turn this into an m4a or m4b that I can play as an audiobook and maintain the chapters, bitrate and stay stereo. I want to ...
0
votes
1
answer
168
views
How can i add audio at specific Frame in FFmpeg?
I have audio that i am adding (without Re-encode) in mute video file, in starting i have intro which has no sound and i want to add audio file after that time/frame , after searching so hard i only ...
- 1
2
votes
1
answer
969
views
Why does ffmpeg alter timestamps when "-codec copy" is given, and how to prevent this?
I am currently trying to remove certain audio tracks from a bunch of m2ts files (mainly to save space), using ffmpeg. In doing so, I would like the removal of those tracks to be the only action that ...
- 1,835
0
votes
0
answers
119
views
FFMpeg removes the video stream unintentionally
I used the following ffmpeg command to downscale a video. But surprisingly the output did not have any video stream, just an audio-only output.
ffmpeg -y -i "input.mov" -c:v libx264 -vf ...
- 123
0
votes
0
answers
400
views
ffmpeg - Jitter when streaming audio over RTP
So as a disclaimer, i'm trying to do something with ffmpeg that may be at the limit of what can be achieved. However, even though it's not possible, i would like to understand why.
What I want to do ...
- 101
0
votes
1
answer
121
views
Why the playlist chunk duration is different?
I have this m3u8 playlist from Twitter/x which has this chunk:
#EXTINF:2.923,
chunk_1701372432609842942_707_a.aac
#EXT-X-PROGRAM-DATE-TIME:2023-11-30T19:27:21.236Z
As you can see the duration of this ...
- 3
0
votes
1
answer
119
views
Combine images and draw text on each image with animation xfade
I am using ffmpeg to merge multiple images and an audio to produce a video. I am using drawtext and xfade with dissolve transition. My ffmpeg command is given below.
ffmpeg -loop 1 -t 5 -i ./img/img0....
- 101