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Questions tagged [opus]

Opus is a lossy audio coding format designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors.

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How to build Opus or playable audio from wireshark capture?

I was able to create a wav file from a wireshark capture. Here is how I do it. 1. I use tcpdump to capture all the packets and filter for RTP packets. Each RTP packet has a "Synchornization ...
Tono Nam's user avatar
  • 879
0 votes
0 answers
35 views

How to edit Opus comments?

Is there any tool that can edit Opus comments? In particular, I want to add multiple METADATA_BLOCK_PICTUREs to an Ogg/Opus file. opusenc can't edit comments. EasyTag corrupts Ogg files. ffmpeg doesn'...
Matthew's user avatar
  • 288
1 vote
1 answer
238 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. ...
peppy's user avatar
  • 13
0 votes
0 answers
107 views

FFmpeg conversion of audio to Opus produces larger than expected file

I have lots of 16-bit 8KHz wav files that I'm trying to convert into Opus format. Using a sample file, ffmpeg converts it in under a second: ffmpeg.exe -i file.wav -b:a 24k -c:a libopus FileFromFFmpeg....
KenD's user avatar
  • 653
0 votes
0 answers
126 views

Opus codec bitrate scalability

On the website of the Opus code, there is an example demonstrating bitrate scalability. This example is intended to "demonstrates what happens when gradually varying the bitrate". This ...
phantom-99w's user avatar
0 votes
0 answers
109 views

Cross compiling ffmpeg: error while adding libopus: undefined reference to `__memcpy_chk'

I have set in the cmake file the following: set(STACK_PROTECTOR_SUPPORTED 0) set(FORTIFY_SOURCE_SUPPORTED 0) However ffmpeg configure fails at this point: (from config log) ... ... rnx/...
Rajib's user avatar
  • 3,106
0 votes
0 answers
317 views

Change sample rate in OggOpus metadata (48 kHz to 44.1 kHz) without re-encoding

I have many Opus encoded files that play high pitched in any player because somewhere in the metadata they are marked as 48 kHz (or unmarked but assumed to be 48 kHz) but are in fact 44.1 kHz. If I ...
Nick Bailuc's user avatar
0 votes
1 answer
167 views

Is it possible to add text (e.g. a transcription or lyrics) to AMR or OPUS sound files?

Is it possible to add text (e.g. a transcription or lyrics) to AMR or OPUS sound files? Googling for this mostly returns transcription services, not whether there are defined meta data fields for this ...
d-b's user avatar
  • 814
0 votes
0 answers
538 views

Keep album art with ffmpeg while cutting an opus file

ffmpeg -ss 4.6 -i 1.opus -c copy 2.opus Cuts the file as required but it also removes the album art. Same command works for mp3 files, the album art doesn't get removed for mp3. Edit: I see the ...
gom's user avatar
  • 223
3 votes
1 answer
4k views

How can I convert an Opus audio to a format usable by iOS?

How can I convert an Opus audio file with the distributed ffmpeg binaries to a format usable by iOS? Is there a way to do it without compiling FFmpeg? FFmpeg details: ffmpeg --version ...
Human's user avatar
  • 583
1 vote
0 answers
2k views

Add cover art to opus file using ffmpeg

I'm trying to embed a cover art to an .opus (ogg container) audio file. I'm aware ffmpeg recently added support for that function according to this ticket: https://trac.ffmpeg.org/ticket/4448 Tried ...
blueclouds8666's user avatar
0 votes
1 answer
791 views

reduce my 90gb collection of mp3 to about 10gb

got an insanely simple and working script already: #!/bin/bash -x mkdir .before mkdir .error for i in *.m??; do ffmpeg -n -i "$i" -b:a 16k "${i%.*}.opus" && mv &...
cregox's user avatar
  • 5,894
0 votes
1 answer
1k views

ffmpeg Unknown encoder 'libopus' centos7

I am new to centos7. I installed the FFmpeg for converting mp3 files to opus (Telegram Bot). However, I tried many ways to install it, every time I got the same errors! For example, I used these ...
Ali Lord's user avatar
2 votes
1 answer
2k views

Convert WebM to Opus without encoding?

Tried all various commands with ffmpeg and also tried using mkvconvert and while they both instantly convert or extract the .opus from the .webm file.. the problem is the output file is always ...
goldnick7's user avatar
  • 422
0 votes
0 answers
530 views

MPlayer doesn't play libopus in TCP MPEG-TS stream by ffmpeg

I'm trying to setup ultra-low p2p streaming using FFMPEG and MPlayer with MPEG-TS stream over TCP. As aac codec introduces notable additional latency, I'd like to use libopus instead. When I do so, ...
val - disappointed in SE's user avatar
18 votes
0 answers
9k views

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 ...
alexitx's user avatar
  • 311
1 vote
0 answers
1k views

ffmpeg encoding using ogg with opus container

I am wanting to send whatsapp voice notes and we are needing to convert sample.mp3 to sample.ogg (with opus codec) is this command correct? ffmpeg -i sample.mp3 c:a libopus sample.ogg
Robert Smith's user avatar
4 votes
2 answers
5k views

FFmpeg drops the Album Art

Everytime I encode my songs to lossy formats, the output file keeps the tags (title, artist, album, etc...), but drops the album art. I tried to encode to any lossy format, including AAC, OGG and ...
آرنولد پفکی's user avatar
2 votes
1 answer
7k views

Why do audio files converted from OPUS to M4A have a much higher bitrate?

When doing: youtube-dl -xf bestaudio/best <link to playlist> ...I get a lot of OPUS files at relatively "normal" bitrates like 130kbps. However, when I run the same command with the ...
Hashim Aziz's user avatar
  • 12.9k
8 votes
3 answers
6k views

Add album art cover to an OGG/opus file from the command line

I managed to add an album art cover to an OGG/opus file with Kid3 - Audio Tagger but I'd like to do it via the command line on all the files of an album. I tried with ffmpeg but it did not work : $ ...
SebMa's user avatar
  • 1,843