mgns Video Transcoder

[levsch]

I am currently developing the Windows mgns Video Transcoder.

The tool is created for encoding by AOM-AV1 (or x264) codec to target size with constant quality.

The tool also can do semi-automatic resolution selection at encode stage.

It can be downloaded from sourceforge

[Selur]

Out of curiousity: What do you does 'semi-automatic resolution selection at encode stage' do?

[levsch]

Out of curiousity: What do you does 'semi-automatic resolution selection at encode stage' do?

From documentation (mgns/VideoTranscoder/codecs/transcode.md):

The algorithm consists from following phases:

• split video file to chunks, respecting scenes boundary
• transcode the chunks with constant quality with origin resolution
• select most appropriate chunk
• encode the chunk with different resolutions but same target size
• calculate metric for each resolution and select resolution with highest metric

semi-automatic means "select most appropriate chunk" step is performed by a human.

[Selur]

Ah, okay. Thanks for clearing that up.

[levsch]

v1.1.0 is released.

changelog:

fixed: deadlock
fixed: avc concatenation
speed up: encode restarting time was decreased after unexpected stop
speed up: avc encoding speed is improved by descreasing crf level step (current crf level steps: 0.1 for x264 and 1 for av1).
speed up: segmented encode: true middle+uniform encode order is used now.
new: showVersion.cmd fast util was added
changed: install documentation

[levsch]

mgnsVideoTranscoder v1.2.0 is released.

changelog:

* Error description on process creation failure is improved.
* AOM AV1 respects --lag-in-frames parameter for memory consumption detection.
* AOM AV1 encoder params are added: --lag-in-frames --enable-qm --enable-fwd-kf
* user friendly printing of display aspect ratio for media info getting.
* big example was changed by a small example (mgnsVideoTranscoder package size now is 128 MiB)

[levsch]

New version is released 2022-03-30 v1.3.0.

Changelog:

• documents are generated as html in "docs" folder
• mkvtoolnix was updated to 66.0.0
• aomenc: crash workaround at low --cq-level
• aomenc: "--enable-keyframe-filtering=2" support.
• presentation timestamps getting speed is improved for matroska file
• aomenc params are added: --aq-mode, --kf-max-dist, --kf-min-dist, --sb-size, --enable-keyframe-filtering, --arnr-strength, --arnr-maxframes, --enable-restoration, --deltaq-mode, --sharpness, --enable-dnl-denoising, --denoise-noise-level
• was updated to ffmpeg-5.0
• no more need to rename setLocalPaths.template.cmd
• isVideosEqual feature is uncovered

[levsch]

New version is released 2022-04-06 v1.4.0.

Changelog:

• aomenc: most of raw params are added.
• download mirrors were added.
• automatic keyframe interval is added (max 300 frames, or 10 seconds)
• encode chunk size is increased. minimum size is keyframe interval.
• hdr support: MasteringDisplayInfo and ContentLightLevelInfo were added
• fixed: 8K resolution unwanted disk IO was removed during encoder memory detection.
• fixed: pipes IO

[levsch]

New version is released 2022-04-08 v1.4.1.

Changelog:

• ffmpeg was updated to ffmpeg-5.0.1
• broken download links were fixed

[levsch]

New version is released
(2022-09-24) [v1.5.0]

* aomenc was updated to v3.4.0
* vmaf was updated to 2.3.1
* ffmpeg was updated to 5.1.1
* x264 was updated to r3098
* documentation minor fixes
* error handling is improved
* codec name AOM_AV1 was changed to aom_Av1
* codec name AVCEncoder was changed to avc_x264