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Nmkoder does video encoding, muxing, and analysis GUI in Winforms, built around FFmpeg, FFprobe, and av1an.
Free software
OS:
File size: 101MB
Portable version
Old versions
Version history
OS:
File size: 101MB
Portable version
Old versions
Version history
Screenshots
Latest version
Download
Download Nmkoder 1.10.0 101MB Win Portable
Download old versions
Software License
Supported operating systems
Windows Version history / Release notes / Changelog / What's New
Nmkoder 1.10.0 - The biggest update yet!
Changes:
Binaries: Updated aomenc (blueswordm 02/26)
File Import: Better stability, worked around cases where Nmkoder would freeze when importing image sequences
Added a bunch of additional color formats (e.g. HEVC NVENC can now encode 10-bit)
Added a list where the user can add custom ffmpeg filters (both in Quick Convert and AV1AN)
Quick Encode: Subtitle burn-in now also works for bitmap-based (PGS/VobSub/etc) subtitles (previously only text-based subs worked)
AV1AN: Fixed SVT advanced args not working
AV1AN: Nmkoder will now mux a text attachment into the encoded MKVs containing the encoder and arguments used
AV1AN: Fixed x265 10-bit not working
AV1AN: Max chunk size (extra cuts) now match with auto-detected GOP size (fps*10 with a limit of 480)
Quick Convert: Added trimming tool to set start and end time (or frame numbers) for encoding
Quick Convert: Target filesize mode now correctly accounts for all audio streams and their channel counts
Track List: Track descriptions are now better formated, more uniform, and codec names have aliases (e.g. hdmv_pgs_subtitle is now just PGS)
Track List: Added button to extract attachments (only visible if an attachment track is selected)
Track List: The default audio/subtitle track dropdowns now correctly load the actual default tracks (if the input files has them set)
Pixel formats now have more human-readable formatting (e.g. YUV420P10LE is now displayed as "YUV - 4:2:0 - 10 bit")
Fixed color space typo (bt601 was written as bt610)
Color Transfer Util: Fixed HDR metadata transfer not transferring white color coordinates
Color Transfer Util: Fixed some issues where the data of an attachment would be used instead of the video stream
Auto-Crop: Adjusted cropdetect command to avoid rare freeze problems and improve reliability
Metrics Util: If the encoded video was resized, it will always be scaled to the res of the reference size instead of the other way
UI/UX: Show a warning if any of the imported input files are no longer available at their original path
UI/UX: Message boxes no longer pop up in the background and no longer hide the main windows after clicking on them (in some cases)
UI/UX: Nmkoder will no longer try to generate thumbnails from files that don't have a video stream (e.g. audio files)
UI/UX: Changing audio channels no longer resets the bitrate input
UI/UX: You can now select which settings will be reset when opening a new file (trim, crop, custom args, ...)
UI/UX: Added link buttons
Fixed EAC3 option actually using AAC
Other minor fixes and improvements
Changes:
Binaries: Updated aomenc (blueswordm 02/26)
File Import: Better stability, worked around cases where Nmkoder would freeze when importing image sequences
Added a bunch of additional color formats (e.g. HEVC NVENC can now encode 10-bit)
Added a list where the user can add custom ffmpeg filters (both in Quick Convert and AV1AN)
Quick Encode: Subtitle burn-in now also works for bitmap-based (PGS/VobSub/etc) subtitles (previously only text-based subs worked)
AV1AN: Fixed SVT advanced args not working
AV1AN: Nmkoder will now mux a text attachment into the encoded MKVs containing the encoder and arguments used
AV1AN: Fixed x265 10-bit not working
AV1AN: Max chunk size (extra cuts) now match with auto-detected GOP size (fps*10 with a limit of 480)
Quick Convert: Added trimming tool to set start and end time (or frame numbers) for encoding
Quick Convert: Target filesize mode now correctly accounts for all audio streams and their channel counts
Track List: Track descriptions are now better formated, more uniform, and codec names have aliases (e.g. hdmv_pgs_subtitle is now just PGS)
Track List: Added button to extract attachments (only visible if an attachment track is selected)
Track List: The default audio/subtitle track dropdowns now correctly load the actual default tracks (if the input files has them set)
Pixel formats now have more human-readable formatting (e.g. YUV420P10LE is now displayed as "YUV - 4:2:0 - 10 bit")
Fixed color space typo (bt601 was written as bt610)
Color Transfer Util: Fixed HDR metadata transfer not transferring white color coordinates
Color Transfer Util: Fixed some issues where the data of an attachment would be used instead of the video stream
Auto-Crop: Adjusted cropdetect command to avoid rare freeze problems and improve reliability
Metrics Util: If the encoded video was resized, it will always be scaled to the res of the reference size instead of the other way
UI/UX: Show a warning if any of the imported input files are no longer available at their original path
UI/UX: Message boxes no longer pop up in the background and no longer hide the main windows after clicking on them (in some cases)
UI/UX: Nmkoder will no longer try to generate thumbnails from files that don't have a video stream (e.g. audio files)
UI/UX: Changing audio channels no longer resets the bitrate input
UI/UX: You can now select which settings will be reset when opening a new file (trim, crop, custom args, ...)
UI/UX: Added link buttons
Fixed EAC3 option actually using AAC
Other minor fixes and improvements
View full changelog
All features
Input
Supports all formats that ffmpeg can decode
Either use "Muxing Mode" to either convert a single file or merge multiple files into one, or "Batch Processing Mode" to run an action on each file
Supports image sequence inputs (PNG/WEBP/JPEG/BMP) without requiring sequential filenames (FPS needs to be set manually)
Track List
View codec, language, title and more (depending on stream type) of selected media stream
Enable or disable streams with checkboxes - Disabled streams will not be included when encoding/muxing
Re-order streams
Convert (FFmpeg)
Encode video using ffmpeg and its encoder plugins
Video Formats: H264 (x264 or NVENC), H265 (x265 or NVENC), VP9, AV1
Image Formats: Animated GIF, PNG Sequence, JPEG Sequence
Audio Formats: AAC, Opus, Vorbis, E-AC-3, MP3, FLAC
Text-based Subtitle Formats: Mov_Text for MP4/MOV, SRT for MKV, WebVTT for WEBM
All media types also have the option to strip (remove) or copy (mux without re-encoding) instead of encoding
Set metadata (title and language) for each track
Encoder Options: Set quality and speed/effort aka preset, set color format
Quality Modes: Either use a constant quality, target bitrate, or target filesize
Video Options: Resample frame rate, resize either using absolute or relative numbers, manually or automatically crop black bars
Audio Options: Set quality and channels/layout
Subtitle Options: Optionally burn in a subtitle track
AV1AN Chunked Encoding
Encode video using av1an and supported encoders
Video Formats: H265 (x265), VP9 (VPX), AV1 (AOM or SVT-AV1)
Quality Modes: Either use a constant quality or target a VMAF score (experimental)
Same audio and video options as FFmpeg encoding
Set AV1 film grain synthesis (disabled for H265/VP9 as this is exclusive to AV1)
Av1an Options: Change splitting method, chunk creation method, amount of workers, and more
Encodes can be stopped and resumed at any time
Utilities
Utilities are "shortcuts" for actions that normally require long (and/or multiple) CLI commands
Read Bitrates: Calculates stream size and average bitrate for each stream
Get Metrics: Calculate quality metrics like VMAF, SSIM, PSNR
Transfer Color Metadata: Copy color properties and HDR metadata from one file to another (e.g. from Bluray Remux to an encode)
Concatenate Into Single MKV: Merge any amount of any compatible video format into a single MKV (e.g. for chunked encoding)
Show Bitrate Chart: Samples the bitrate across the entire video and shows a graph allowing you to see where bitrate is higher or lower
Compatibility
Tested on and intended for Windows 10 64-bit. Windows 11 should work as well.
.NET Framework 4.7.2 is required which should be pre-installed.
There is no native Linux or Mac port and I don't plan on making one as Linux users constantly tell me how much they love their CLI. However, if you still want to run this on Linux, use WINE, it should work without problems.
Supports all formats that ffmpeg can decode
Either use "Muxing Mode" to either convert a single file or merge multiple files into one, or "Batch Processing Mode" to run an action on each file
Supports image sequence inputs (PNG/WEBP/JPEG/BMP) without requiring sequential filenames (FPS needs to be set manually)
Track List
View codec, language, title and more (depending on stream type) of selected media stream
Enable or disable streams with checkboxes - Disabled streams will not be included when encoding/muxing
Re-order streams
Convert (FFmpeg)
Encode video using ffmpeg and its encoder plugins
Video Formats: H264 (x264 or NVENC), H265 (x265 or NVENC), VP9, AV1
Image Formats: Animated GIF, PNG Sequence, JPEG Sequence
Audio Formats: AAC, Opus, Vorbis, E-AC-3, MP3, FLAC
Text-based Subtitle Formats: Mov_Text for MP4/MOV, SRT for MKV, WebVTT for WEBM
All media types also have the option to strip (remove) or copy (mux without re-encoding) instead of encoding
Set metadata (title and language) for each track
Encoder Options: Set quality and speed/effort aka preset, set color format
Quality Modes: Either use a constant quality, target bitrate, or target filesize
Video Options: Resample frame rate, resize either using absolute or relative numbers, manually or automatically crop black bars
Audio Options: Set quality and channels/layout
Subtitle Options: Optionally burn in a subtitle track
AV1AN Chunked Encoding
Encode video using av1an and supported encoders
Video Formats: H265 (x265), VP9 (VPX), AV1 (AOM or SVT-AV1)
Quality Modes: Either use a constant quality or target a VMAF score (experimental)
Same audio and video options as FFmpeg encoding
Set AV1 film grain synthesis (disabled for H265/VP9 as this is exclusive to AV1)
Av1an Options: Change splitting method, chunk creation method, amount of workers, and more
Encodes can be stopped and resumed at any time
Utilities
Utilities are "shortcuts" for actions that normally require long (and/or multiple) CLI commands
Read Bitrates: Calculates stream size and average bitrate for each stream
Get Metrics: Calculate quality metrics like VMAF, SSIM, PSNR
Transfer Color Metadata: Copy color properties and HDR metadata from one file to another (e.g. from Bluray Remux to an encode)
Concatenate Into Single MKV: Merge any amount of any compatible video format into a single MKV (e.g. for chunked encoding)
Show Bitrate Chart: Samples the bitrate across the entire video and shows a graph allowing you to see where bitrate is higher or lower
Compatibility
Tested on and intended for Windows 10 64-bit. Windows 11 should work as well.
.NET Framework 4.7.2 is required which should be pre-installed.
There is no native Linux or Mac port and I don't plan on making one as Linux users constantly tell me how much they love their CLI. However, if you still want to run this on Linux, use WINE, it should work without problems.
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Our hosted software are virus and malware scanned with several antivirus programs using www.virustotal.com. (NOTE! Just one virustotal warning is 99.9% a false positive. And some software might receive 2-6 warnings but it's if they are not all same virus/trojan then it's 99% false positives.)
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NEW SOFTWARE= New tool since your last visit
NEW VERSION= New version since your last visit
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NEW VERSION= New version
Latest version
Version number / Beta version number / Update version number and when it whas released.
Type and download
NO MORE UPDATES? = The software hasn't been updated in over 2 years.
NO LONGER DEVELOPED = The software hasn't been updated in over 5 years.
RECENTLY UPDATED = The software has been updated the last 31 days.
Freeware = Download Free software.
Freeware Trialware = Download Free software but some parts are trial/shareware.
Free software = Download Free software and also open source code also known as FOSS (Free and Open Source Software).
Free software Trialware = Download Free software and also open source code but some parts are trial/shareware.
Freeware Ads = Download Free software but supported by advertising, usually with a included browser toolbar. It may be disabled when installing or after installation.
Free software Ads = Free Download software and open source code but supported by advertising, usually with a included browser toolbar. It may be disabled when installing or after installation.
Trialware = Also called shareware or demo. Free Trial version available for download and testing with usually a time limit or limited functions.
Payware = No demo or trial available.
Portable version = A portable/standalone version is available. No installation is required.
v1.0.1 = Latest version available.
Download beta = It could be a Beta, RC(Release Candidate) or an Alpha / Nightly / Unstable version of the software.
Download 15MB = A direct link to the software download.
Win = Windows download version. It works on 32-bit and 64-bit Windows.
Win64 = Windows 64-bit download version. It works only on 64-bit Windows.
Mac = Mac download version. It works on 32-bit and 64-bit Mac OS.
Mac64 = Mac OS download version. It works only on 64-bit Mac OS.
Linux = Linux download version.
Portable = Portable version. No installation is required.
Ad-Supported = The software is bundled with advertising. Be careful when you install the software and disable addons that you don't want!
Visit developers site = A link to the software developer site.
Download (mirror link) = A mirror link to the software download. It may not contain the latest versions.
Download old versions = Free downloads of previous versions of the program.
Download 64-bit version = If you have a 64bit operating system you can download this version.
Download portable version = Portable/Standalone version meaning that no installation is required, just extract the files to a folder and run directly.
Portable version available = Download the portable version and you can just extract the files and run the program without installation.
Old versions available = Download old versions of the program.
Version history available = Complete changelog on our site.
= Windows version available. = Mac OS version available. = Linux version available.Our hosted software are virus and malware scanned with several antivirus programs using www.virustotal.com. (NOTE! Just one virustotal warning is 99.9% a false positive. And some software might receive 2-6 warnings but it's if they are not all same virus/trojan then it's 99% false positives.)
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Rating from 0-10.
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