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An initial guide to get the best performance for Overwatch on Linux
Hello! I have promised many of you guys that I will make a guide to get most out of your Linux machine to smooth sail on Overwatch and get those fine blink punches/sleeps/deflects/6 man shatters/etc... And I haven't done it yet! Because I am still working on figuring it out (there are so many things to consider and test out), I am also working on making scripts that will be useful to you guys! So for now, I will state what I am using along with my experience with things. Note that for example that I don't have any information on tweaks related to Nvidia cards and Intel CPUs, feedback is appreciated on that end. If you have questions please ask on the comments. Now let's start!
My specs and stats
Currently on Arch, used Ubuntu, both work awesomely.
RX 5700 XT
Ryzen 3700X
2x8GB 3200Mhz RAM with custom timings, I don't know what the impact of improving the timings on overwatch. It has been reported to be beneficial for some games (I have read a Techspot article on the matter, I can try to find it if you are interested)
240Hz monitor
Overwatch
Installed and run through Lutris
Medium settings, 100% render scale, windowed Fullscreen (I have problems with Fullscreen where the mouse cursor doesn't appear anymore and/or not moving the view ingame anymore)
Running in the ballpark of 230fps in 6v6, capped 250 on 4v4s. I haven't done a proper benchmark yet. A good idea would be to save replay code with lots of action (being a tracer main it will be easy to do), share it here, use it as a reference for benchmarks.
System configuration
This is the interesting part for you!
Lutris
I have only used Lutris to install and run Overwatch, I don't think there's room for improvement in here since Lutris is just here to run overwatch with a chosen Wine version and environment variables. Correct me if I am wrong. Some useful settings: * Enable FSYNC (if you have a patched custom kernel) otherwise enable ESYNC: once overwatch is installed, go to "Configure" > "Runner Options" > Toggle FSYNC or ESYNC.
DXVK
This is the library that maps DirectX (Windows) calls to Vulkan (Multi-platform and open source). It's better than wine's built-in mapper called WineD3D. Lutris provides a version already. You can compile your own latest one with some better compiler optimizations if you wish, and that's what I am doing but I have no idea about the possible FPS benefits of doing that. To do so you will need to put what DXVK's compile script gives you in ~/.local/share/lutris/runtime/dxvk/. Link here: https://github.com/doitsujin/dxvk ```shell git clone https://github.com/doitsujin/dxvk.git cd dxvk export CFLAGS="-march=native -O3 -pipe" export CXXFLAGS="${CFLAGS}"
Build new DLLS
./package-release.sh master ~/.local/share/lutris/runtime/dxvk/ --no-package And if you feel even more adventurous, you can replace `CFLAGS` export with this set of compiler flags: shell export CFLAGS="-march=native -O3 -pipe -floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block -ftree-vectorize -fno-semantic-interposition -fipa-pta -fdevirtualize-at-ltrans" `` Then you go in Lutris and tell it to use this version of dxvk: "Configure" > "Runner Options" > "DXVK Version" and putdxvk-master`
GPU
Update to the latest possible driver for your GPU
If you are hesitating between AMD and Nvidia for your next GPU buy. As far as Linux is concerned: AMD all the way, because they are way more supported since they give out an open source driver.
"Very old" GPUs: the opensource driver is radeon and you only have that as an option, along with AMD's closed source driver I believe. But you are out of luck for running DXVK, since both driver's don't implement Vulkan.
"Old" GPUs: GCN1 and GCN2 are now supported by the newer "amdgpu" driver and you switch to it to win a few frames.
New GPUs: the base driver is amdgpu, and is shipped and updated with the linux Kernel, stacks on top of it three different drivers:
Mesa: the open source graphics stack that handles AMD, Intel, Qualcomm ...etc GPUs. The AMD OpenGL driver is called RadeonSI Gallium3D and is the best you can get. The Vulkan driver is called RADV
amdgpu PRO: AMD's official closed source driver, that has its own Vulkan and OpenGL implementation.
Mesa / RADV
If you are running RADV and with a mesa version prior to 20.2, you should consider trying out ACO as it makes shader compilation (which happens on the CPU) way faster : go to "Configure" > "System Options" > Toggle ACO. Your distro ships the latest stable version, you can go more bleeding edge to get the latest additions, but keep in mind that regressions often come with it. On Ubuntu there's a PPA that gives out the latest mesa. Otherwise you can compile only RADV by hand with the extra bonus of using "agressive" compiler optimisations (-march=native, -O3, and LTO, PGO is also possible but I am still failing to successfully pull it off) and use it for Overwatch (and any other Vulkan game) in a per game basis: shell git clone --depth=1 https://gitlab.freedesktop.org/mesa/mesa.git cd mesa mkdir build export CFLAGS="-march=native -O3 -pipe" export CXXFLAGS="${CFLAGS}" meson .. \ -D prefix="$HOME/radv-master" \ --libdir="$HOME/radv-mastelib" \ -D b_ndebug=true \ -D b_lto=true \ -D b_pgo=off \ -D buildtype=release \ -D platforms=drm,x11,wayland \ -D dri-drivers= \ -D gallium-drivers= \ -D vulkan-drivers=amd \ -D gles1=disabled \ -D gles2=disabled \ -D opengl=false meson configure ninja install And here again, if you feel even more adventurous, you can for this set of compiler flags: shell export CFLAGS="-march=native -O3 -pipe -floop-interchange -ftree-loop-distribution -floop-strip-mine -floop-block -ftree-vectorize -fno-semantic-interposition -fipa-pta -fdevirtualize-at-ltrans" After running the lines above, you get the driver installed in $HOME/radv-master. Now, to use it for Overwatch, you go to "Configure" > "System Options" > Environment variables and add the following line: VK_ICD_FILENAMES=$HOME/radv/share/vulkan/icd.d/radeon_icd.x86_64.json:$OTHER_PATH/radeon_icd.i686.json where you should manually replace $HOME by your home path /home/Joe and $OTHER_PATH by where radeon_icd.i686.json actually is, you can find out with sudo updatedb locate radeon_icd.i686.json If the games crashes after doing all this, you can either try other git commits (you will need some git knowledge) or revert to the stable driver by simply removing the VK_ICD_FILENAMES environment variable. And if you don't wanna hear about bleeding edge mesa anymore you can simply remove the mesa folder along with $HOME/radv-master.
Nvidia
The least one can do is redirect to Arch's documentation about it: https://wiki.archlinux.org/index.php/NVIDIA If you didn't install the proprietary driver your computer is likely to be running an open source driver called nouveau, but you wouldn't want that to play games with that as it works based off reverse engineering and doesn't offer much performance. Once you have the proprietary driver installed, open nvidia-settings, make sure you have set your main monitor to its maximum refresh rate and have 'Force Full Composition Pipeline' disabled (advanced settings). Also, in Lutris, you can disable the size limit of the NVidia shader cache by adding __GL_SHADER_DISK_CACHE_SKIP_CLEANUP=1 to the environement variables.
Kernel
First, try to get the latest kernel your distro ships, it often comes with performance improvements (it contains the base updates for the amd gpu driver for example). Otherwise, this is something not many touch, but using a custom one can bring improvements, especially on the 1% low fps (a benchmark here: https://flightlessmango.com/benchmarks/XDXMkN8m_FY). I am running linux-tkg, with the PDS scheduler and FSYNC patch. Both of these help getting better performance in games. Linux-tkg needs to be compiled on your own machine (where you can use compiler optimisations such as -O3 and -march=native) with an interactive script and a config file, I worked on the script to install on Ubuntu recently :D. link here: https://github.com/Frogging-Family/linux-tkg For a less efforts solution, you can look up Xanmod kernel, Liquorix, Linux-zen. That provide precompiled binaries.
Game mode
It's a small program that puts your computer in performance mode when you start your game, it's available in most distro's repositories and I believe it helps in giving consistent FPS. Lutris uses it automatically if it's detected, otherwise you need to go, for Overwatch, "Configure" > "System Options" > "Environment variables" and add LD_PRELOAD="$GAMEMODE_PATH/libgamemodeauto.so.0" where you should replace $GAMEMODE_PATH with the actual path (you can do a locate libgamemodeauto.so.0 on your terminal to find it). Link here: https://github.com/FeralInteractive/gamemode. You can check whether or not gamemode is running with the command gamemoded -s. For GNOME users, there's a status indicator shell extension that show a notification and a tray icon when gamemode is running: https://extensions.gnome.org/extension/1852/gamemode/
Wine
Wine can have quite the impact on Overwatch, both positive and negative. Latest wine from Lutris works fine. You can give a try to wine-tkg here, it offers quite the amount of performance patches and, for overwatch, improve the game's performance. It also can be compiled with more agressive optimisations: https://github.com/Frogging-Family/wine-tkg-git
X11/Wayland
I use only X11 for now, and works nicely. Wayland is not a good idea, except if you want to try a custom wine with Wayland patches: https://github.com/varmd/wine-wayland. I tried once and failed, haven't retried, to see if some performance benefits can be reaped.
Performance overlays
Two possibilities:
MangoHud: It is available in the repositories of most linux distros, to activate it, you only need to add the environment variable MANGOHUD=1, the stats you want to see in MANGOHUD_CONFIG. More information here: https://github.com/flightlessmango/MangoHud
DXVK has its own HUD and can be enabled by setting the variable DXVK_HUD, the possible values are explained in its repository
OBS/Streaming
Works nicely with X11 on AMD GPUs, actually better than Windows, since you can use VAAPI-FFMPEG on Linux, and it has a better video quality than the AMD thingy on windows. Nvidia has been reported to work nicely on linux and on windows with their new NVENC thing.
Compositor / desktop effects
The compositor is the part of your DE that adds desktop transparency effects and animations. In games, this can result in a noticeable loss in fps and added input lag. Some DEs properly detect the fullscreen application and disable compositing for that window, others don't. Luckily, Lutris has a system option called Disable desktop effects which will disable compositing when you launch the game and restore it when you close it.
Misc
Background YT videos: If you have youtube music in the background, try to switch to an empty tab and not leave the tab on the video. I noticed that like this the video doesn't get rendered and helps freeing your GPU or CPU (depending on who is doing the decoding).
KDE file indexer : If you're using KDE, you may consider disabling the file indexer. This is either done in the KDE settings or with balooctl disable (requires a reboot).
I will update this post whenever something new comes up or someone has new things to share: Your feedback is more than welcome!
} Windowed 640x480 32 color 32 texture 0Hz NoVsync AA Found 2 DirectInput devices: 0: 'Keyboard' axes: 0, hats: 0, buttons: 256 (buffered) 1: 'DDR Mat for PlayStation(R)3' axes: 4, hats: 1, buttons: 13 (buffered) Found Pump pad 0 WARNING: Theme element 'Fonts/ScreenDebugOverlay title' could not be found in 'Themes/SIMPLY LOVE (NITGV3)/' or 'Themes/default/'. WARNING: Theme element 'Fonts/ScreenDebugOverlay line' could not be found in 'Themes/SIMPLY LOVE (NITGV3)/' or 'Themes/default/'. Attempting Shader Compilation: attribute vec4 TextureMatrixScale; void main() {
} WARNING: ScreenSelectPlayMode::OptionOrderLeft out of range WARNING: ScreenSelectPlayMode::OptionOrderLeft out of range WARNING: ScreenSelectPlayMode::OptionOrderRight out of range WARNING: ScreenSelectPlayMode::OptionOrderRight out of range WARNING: ScreenSelectPlayMode::OptionOrderAuto out of range WARNING: ScreenSelectPlayMode::OptionOrderAuto out of range WARNING: Speed mod 3x does not exist in the list of possible speed mods, using default... Players joined: P1 Language: english Current renderer: OpenGL Theme: SIMPLY LOVE (NITGV3) Partial log: 00:52.636: 512x256 ( 1) _difficulty icons 6x1.png 00:52.636: 256x256 ( 1) MenuTimer numbers 5x3.png 00:52.636: 8x 8 ( 1) _blank 5x3.png 00:52.636: 1024x128 ( 1) _wendy numbers nospacing 1x12.png 00:52.636: 2048x128 ( 1) _wendy score 1x15.png 00:52.636: 512x512 ( 1) _eurostile normal (mipmaps) 16x16.png 00:52.636: total 10610112 texels 00:52.636: Zeroing this update. Was 0.001766 00:52.636: Song::LoadFromSMFile(Cache//Songs/3455556375) 00:52.644: old bga -1 -> new bga 1, 0.000000, 0.000000 -- End of report
Audacity(R): free, open source, cross-platform audio software for multi-track recording and editing: https://www.audacityteam.org/ . User support is provided on Audacity Forum: https://forum.audacityteam.org/ . We welcome feedback on Audacity, suggestions for new or improved features, and bug reports. Please visit https://forum.audacityteam.org/viewforum.php?f=25 . Audacity is copyright (c) 1999-2019 by Audacity Team. This copyright notice applies to all documents in the Audacity source code archive, except as otherwise noted (mostly in the lib-src subdirectories). "Audacity" is a registered trademark of Dominic Mazzoni. The Audacity documentation is licensed under the Creative Commons Attribution 3.0 license: https://creativecommons.org/licenses/by/3.0/legalcode . Compilation instructions for Audacity are provided in the source code: * Windows: win\build.txt * macOS: mac/build.txt * GNU/Linux: linux/build.txt You can ask for help with compilation problems at: https://forum.audacityteam.org/viewforum.php?f=19 . If you want to suggest some simple text change in our code, please submit a pull request on https://github.com/audacity/audacity/pulls . It's usually best to discuss functional code changes with us first on audacity-devel: https://lists.sourceforge.net/lists/listinfo/audacity-devel . Version 2.3.3 Contents of this README:
Licensing
Changes since version 2.3.2
Known Issues at Release
Source Code, Libraries and Additional Copyright Information
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The program source code is also freely available as per Section 4 of this README. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program (in a file called LICENSE.txt); if not, go to https://www.gnu.org/licenses/old-licenses/gpl-2.0.html or write to Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307 USA --------------------------------------------------------------------------------
Changes since version 2.3.2:
Improvements * Equalization effect now split into two effects, Filter Curve and Graphic EQ. * Presets (using manage button) now active/working. * Can now have two points at same frequency for steep steps. * 'What you hear is what you get' for exports. Formerly the solo button preferences could lead to differences in which tracks were exported. * Leading silence (blank space) not skipped over in exports. * Quality setting on AAC/M4A exports. * Some confusing functionality removed (better achieved in other ways) * Removed Nyquist Workbench (use built-in nyquist features) * Removed Vocal Remover (use Vocal Reduction) * Removed On-Demand aliased files (copy files instead) * Removed 'Normalize on Load' (Normalize as needed on export, instead) See also: https://wiki.audacityteam.org/wiki/New_features_in_Audacity_2.3.3 Bug Fixes Over 150 bugs in 2.3.2 fixed, including: * 2112 - Crash when opening Equalization settings in a Macro * 2127 - Crash deleting a track while in Record/Pause state * 2176 - Crash when attempting to time shift multiple tracks * 2141 - Tabbing between labels stopped working * 2200 - Refusal to export some large (4GB) files on size grounds See also: https://wiki.audacityteam.org/wiki/Release_Notes_2.3.3 -------------------------------------------------------------------------------
Known Issues in 2.3.3:
Audacity 2.3.3 does not properly support macOS Catalina. There are new security restrictions in Catalina on using the microphone. For example, Audacity may run, but fail to record. Catalina was released towards the end of 2.3.2 development. For best workarounds and other known issues in 2.3.2, please see: https://wiki.audacityteam.org/wiki/Release_Notes_2.3.2/Issues -------------------------------------------------------------------------------
Source Code, Libraries and Additional Copyright Information
Source code to this program is always available; for more information visit our web site at: https://www.audacityteam.org/download/source Audacity is built upon other free libraries; some of these libraries may have come with Audacity in the lib-src directory. Others you are expected to install first if you want Audacity to have certain capabilities. Most of these libraries are not distributed under the terms of the GPL, but rather some other free, GPL-compatible license. Specifically: expat: BSD-like license. Provides XML parsing. Included with Audacity. FFmpeg: GPL or LGPL (according to how you obtain/configure it) Provides decoding/encoding of additional formats. Optional separate download. libid3tag: GPL Reads/writes ID3 tags in MP3 files. Optional separate download as part of libmad. libflac: Xiph.Org BSD-like licence (the parts we use) Decodes and Encodes Free Lossless Audio Codec files. Optional separate download. libmad: GPL Decodes MP3 files. Optional separate download. libnyquist: BSD-like license. Functional language for manipulating audio; available within Audacity for effects processing. libogg: BSD-like license. Optional separate download, along with libvorbis. libsndfile: LGPL Reads and writes uncompressed PCM audio files. Included with Audacity. libsoxr: LGPL The SoX Resampler library performs one-dimensional sample-rate conversion. libvamp: new-style BSD Plug-in interface and support library for audio analysis plug-ins. Included with Audacity. libvorbis: BSD-like license. Decodes and encodes Ogg Vorbis files. Optional separate download. lv2: a merging of the lilv (ISC license), lv2 (LGPL), msinttypes, serd (ISC), sord, sratom, and suil libraries to support LV2 plug-ins. portsmf: BSD-like license. library for reading and writing midi files. Included with Audacity sbsms: GPL v2 Pitch and tempo changing library. Included in Audacity SoundTouch: LGPL Changes tempo without changing pitch and vice versa. Included in audacity Twolame: LGPL Encodes MPEG I layer 2 audio (used in DVDs and Radio). Optional separate download. wxWidgets: wxWindows license (based on LGPL) Cross-platform GUI library - must be downloaded and compiled separately. For more information, see the documentation inside each library's source code directory. -------------------------------------------------------------------------------- Additional copyright information: -------------------------------------------------------------------------------- Nyquist Copyright (c) 2000-2002, by Roger B. Dannenberg All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions of source code must retain the copyright notice, the list of conditions, and the disclaimer, all three of which appear below under "COPYRIGHT AND LICENSE INFORMATION FOR XLISP." Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Redistributions in binary form must reproduce the copyright notice, the list of conditions, and the disclaimer, all three of which appear below under "COPYRIGHT AND LICENSE INFORMATION FOR XLISP," in the documentation and/or other materials provided with the distribution. Neither the name of Roger B. Dannenberg, Carnegie Mellon University, nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. COPYRIGHT AND LICENSE INFORMATION FOR XLISP (part of Nyquist): Copyright (c) 1984-2002, by David Michael Betz All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of David Michael Betz nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bash $ xmake m -b # start to record $ xmake f -p iphoneos -m debug $ xmake $ xmake f -p android --ndk=~/files/android-ndk-r16b $ xmake $ xmake m -e # stop to record $ xmake m . # playback commands
Run the custom lua script plugin
bash $ xmake l ./test.lua $ xmake l -c "print('hello xmake!')" $ xmake l lib.detect.find_tool gcc
Generate doxygen document plugin
bash $ xmake doxygen [srcdir]
More Plugins
Please download and install from the plugins repository xmake-plugins.
you use an English-language installation of a Windows OS (Vista or newer);
your user account has administrative privileges;
you already have an HD recording with H.264 video and a 5.1 AC3 audio track, packaged in a Matroska container (an .MKV video file).
This is a 5.1 speaker configuration: image here Each speaker plays a different audio channel. A 5.1 surround sound recording will have - that's right - 6 audio channels (I will start the numbering from 0, not 1):
#
Abbr.
Name
0
LF/FL
Front Left
1
RF/FR
Front Right
2
CF/FC/C
Front Center / Center
3
LFE
Low Frequency Effects / Subwoofer
4
LS/SL
Surround Left
5
RS/SR
Surround Right
In comparison, a stereo sound recording will only have - of course - 2 audio channels:
#
Abbr.
Name
0
L
Left
1
R
Right
The sound mix for Melodifestivalen and various other shows (such as Eurovision 2011 and 2013) has:
the main vocals, live backing vocals doubling the main and some audience noise echoes on the front center (FC) channel;
the backing track, some audience noise, echoes from the main vocals and possibly live (non-doubling) backing vocals on the two side front channels (FL and FR);
some other audience noise and other echoes on the surround channels (SL and SR);
any strong bass on the LFE channel.
The main point of this tutorial is that we somehow need to extract the front center channel only. Initially, I wanted to use Audacity (with the FFmpeg plugin/library) and just export the FC channel with the built-in option in Audacity, but, for some reason, I couldn't get Audacity to recognize my FFmpeg installation, so, for the remainder of this post, we will extract the front center channel using an FFmpeg binary (which is a command-line application). The thing is, most useful audio editing programs are either:
expensive, with nice GUIs (graphical user interfaces);
free, but useless for what we want to do;
free command-line tools that can give you customized output (hello there, FFmpeg);
Audacity (which is free, but doesn't always support the codecs you need).
FFmpeg builds can be found here. You only need the static builds for this. Unzip the contents to whatever folder you like (no installation required) and add the path of the folder containing ffmpeg.exe, ffplay.exe and ffprobe.exe into the PATH environment variable in Windows. First, go into that folder, click a blank spot on your address bar and copy the folder path into your clipboard. Adding the path into the Path variable can vary in difficulty, depending on your version of Windows.
If your Windows version is older than Windows 10 (seriously, why would you not upgrade?), you can take various roads:
Method 1A:
Open the Win+X menu (press Win key + X or just right click the start button, if you have one) and go to System > Advanced system settings.
In the Advanced tab, click Environment Variables....
This is so that you can use FFmpeg comfortably, no matter the folder you work in. Test the Path variable by:
Going to a random folder (not the one containing ffmpeg.exe), Shift-rightclicking a blank spot and selecting Open command window here.
Run the command ffmpeg by typing ffmpeg and pressing the Enter key.
If you get a message like this, you're good to go. If it claims that "ffmpeg" can't be recognized, restart your computer.
You can close the command prompt/window. Go to the folder containing your Melodifestivalen recording and open a command prompt there. Run ffprobe [YOUR_FILENAME_HERE] (replace [YOUR_FILENAME_HERE] with your actual filename). If it's a long filename, you can type the first few characters and press the Tab key. If you have multiple, similarly-named files, you can press Tab multiple times and it will cycle through them. Because who types all that? Don't forget to press Enter. What we care about is this. I highlighted the information about the tracks. There is a video track (stream #0:0) and an audio track (stream #0:1). File and track numbering starts from 0, not 1. Therefore, "stream #0:1" means "the second track of the first file" (0 = first, 1 = second, 2 = third and so on). Usually, video streams come first, then the audio tracks, then subtitles and chapters. They might not always be in this order, so it's important to know which track is the 5.1 audio track that you need. Some releases of Melodifestivalen will erroneously show a stereo audio track, when, in fact, it's 5.1. To fix that, you need to extract the audio into its own file, which is what we would have done anyway, so let's do that. Now, since ffmpeg is a command-line program, you will have to follow a specific syntax. A general syntax would be: ffmpeg [INPUT_OPTIONS] -i [INPUT_FILENAME] [OUTPUT_OPTIONS] [OUTPUT_FILENAME] In order to extract the audio track, we will type something along the lines of: ffmpeg -i [YOUR_MF_VIDEO_FILENAME] -map [AUDIO_STREAM] -c copy [OUTPUT_FILENAME] In this example, I will type: ffmpeg -i Melodifestivalen.2016.Deltavling.1.SWEDiSH.720p.HDTV.x264-xD2V.mkv -map 0:1 -c copy audio_only.ac3 Let's break this down:
ffmpeg is the name of the program;
-i Melodifestivalen.2016.Deltavling.1.SWEDiSH.720p.HDTV.x264-xD2V.mkv means that I'm opening the file Melodifestivalen.2016.Deltavling.1.SWEDiSH.720p.HDTV.x264-xD2V.mkv;
-map 0:1 means that I only care about stream #0:1 (the audio track);
-c copy means that I want the audio track to be copied as it is, without re-encoding - we won't lose quality this way;
audio_only.ac3 is the name of the file that will be created (I chose the .ac3 extension because the source audio was AC3, as ffprobe showed me earlier).
Wait for a few seconds (max. 1-2 minutes) while the file is being created. When the prompt reappears (which, for me, will be A:\Melodifestivalen.2016.Deltavling.1.SWEDiSH.720p.HDTV.x264-xD2V\melodifestivalen.2016.deltavling.1.swedish.720p.hdtv.x264-xd2v>), you will know that the transcoding has finished. As we can see, the file audio_only.ac3 has been created in the same folder. Let's run ffprobe audio_only.ac3, to see that we only have an audio track (stream #0:0) right now. Now that we have an audio-only file, we can extract the front center channel: ffmpeg -i audio_only.ac3 -map_channel 0.0.2 vocals_only.wav Let's break it down:
ffmpeg is the name of the program;
-i audio_only.ac3 means that I'm opening the file audio_only.ac3;
-map_channel 0.0.2 means that I only care about channel 2 (FC) from stream #0:0;
vocals_only.wav is the name of the new file (I chose .wav because I wanted to make sure I was not losing data, but you can use ac3, flac, mp3, aac, anything really).
Short Q&A time! Q: Okay, whoa, you lose data with .mp3? A: Yes, there are lossless audio formats (WAV, FLAC, ALAC) and lossy audio formats (AAC, AC3, MP3). If you convert WAV files to FLAC back and forth, you will not lose a single bit of information. If you, however, convert an MP3 file to MP3, and then you convert the resulted MP3 to MP3 and so on, you will get small quality losses each time. So I'll usually use WAV and let Dailymotion compress my audio. That way, they won't ruin it as badly as they could. Blame them :P Q: Why don't we all use FLAC, then? A: Because the files can be 3 or 4 times larger than an MP3. My music collection is in FLAC, by the way. Q: What about M4A files from iTunes? A: They use the AAC codec, which, if used correctly, results in smaller files and higher quality than the best MP3 possible. Apple knows what they're doing with their music. Q: So why did you not just use -c copy? A: Because it would just copy the entire track instead of only giving me the channel that I need. Let's continue. When the prompt reappears, you can open the resulted file and see that, indeed, the music is gone, but the voices still remain. What we can do now is mux (multiplex) the audio back in with the video: ffmpeg -i Melodifestivalen.2016.Deltavling.1.SWEDiSH.720p.HDTV.x264-xD2V.mkv -i vocals_only.wav -map 0:0 -map 0:1 -map 1:1 -c copy mf1.mkv Let's break it down:
ffmpeg is the name of the program;
-i Melodifestivalen.2016.Deltavling.1.SWEDiSH.720p.HDTV.x264-xD2V.mkv means that Melodifestivalen.2016.Deltavling.1.SWEDiSH.720p.HDTV.x264-xD2V.mkv is my first input file (file 0);
-i vocals_only.wav means that vocals_only.wav is my second input file (file 1);
-map 0:0 means that I want to include track 0 from the first file (thus, the video);
-map 0:1 means that I want to include track 1 from the first file (thus, the original audio) - you can leave this part out, if you want;
-map 1:0 means that I want to include track 0 from the second file (thus, the vocal-only audio);
-c copy means that I don't want to re-encode the tracks;
mf1.mkv is the name of my final output file.
It'll take a little longer this time, because it has to copy the whole video (I'm writing a 4.49 GB file here). I think it took, like 3-4 minutes on my end. When you're done, you can just close the command prompt. Don't close it while the files are being created! Or you could just make short videos of what you want. When muxing MKVs, I much prefer using MKVtoolnix, as I can just cut the parts that I need. And yes, this one has a proper GUI :) To illustrate the result, I uploaded this:
Re-written API code. FFmpeg for Windows and latest Audacity versions FFmpeg RECOMMENDED ZIP OPTION: ffmpeg-win-2.2.2.zip FFmpeg 2.2.2 Binary for Windows, compatible with Audacity 2.0.6 and later (please update, or use v0.6.2 below) ffmpeg-win-2.2.2.exe - (SHA256 SUM here). Monday, 14 August 2017. Ffmpeg Win Binary Options [Index] PART I – Introduction (revised 02-jul-2012) PART II – Parameters and recipes (revised 02-jul-2012) PART III – Encoding in H.264 (revised 02-jul-2012) PART IV – FFmpeg for streaming (revised 02-jul-2012) PART V – Advanced usage (revised, 19-oct-2012) PART VI – Filtering (new, 19-oct-2012). Introduction. After almost one year from the starting post of this series dedicated to ... FFmpeg 2.8.17 "Feynman" 2.8.17 was released on 2020-07-07. It is the latest stable FFmpeg release from the 2.8 release branch, which was cut from master on 2015-09-05. Amongst lots of other changes, it includes all changes from ffmpeg-mt, libav master of 2015-08-28, libav 11 as of 2015-08-28. It includes the following library versions: When using fluent-ffmpeg, ffmpeg (and ffprobe) normally the library assumes that the binary is installed and /or the path available as an environment variable, as described here. However, in context like electron, you don’t want to go and interfere with the user's systems configurations too much.
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