Video group head: Dr. Dmitriy Vatolin Project head: Dr. Dmitriy Kulikov Measurements, analysis: Nickolay Safonov, Aleksandr Kostychev, Anna Bigler
compression.ru	Lomonosov Moscow State University (MSU) Graphics and Media Lab	Dubna International State University	MSU Institute of Advanced Studies of Artificial Intelligence and Intelligent Systems

Important Dates

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• Important updates
• About
• 2023-2024 Comparison parts
• New features
• Comparison Rules and Methodology
• Frequently asked question (FAQ)
• Participate
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Important updates

• Only Linux compatible encoders this year
• Subjective and Objective FullHD parts share

• Only one submission iteration
• We align the encoders' speed by bitrate on 7-10 publicly available videos that represent the complexity of the set. We will use 5 main objective quality metrics for speed-quality alignment
• Each encoder should have relative speed less than 100% to reference encoder by all main metrics

• For each participant, the following information is fixed before the measurement begins and cannot be updated afterwards:
• encoder name
• encoder developer
• developer contacts
• publication conditions
• Each team can only publish one encoder (preset) for each standard
• We will share for each metric published on the site the place of the encoder (including private ones, without names)

About Annual MSU Video Codecs Comparisons

We perform comparative unbiased analysis for

• software implementations
• hardware (GPU-based) implementations
• cloud-based implementations

With MSU Codecs Comparison developers can verify the performance of their codec. We share test sequences, encoding parameters and codecs versions so all developers can reproduce the results of the comparison. Participation with publishing of all results is for FREE. Private participation is for fee (contact us for the details).

• There were more than 400.000 downloads of previous H.264/MPEG-4 AVC and H.265/HEVC video codec comparisons reports
• Many codecs' bugs were found and reported to developers
• 240+ encoders were tested
• More than 100 private reports for codec developers (description of codec's weak and strong points) after public report versions

• Objective measurements
• Subjective analysis
• Encoding time
• Speed/Quality trade-off analysis
• Averaged objective results analysis
• Leaders in different use cases

2023-2024 Comparison parts and requirements

New features in MSU Video Codecs Comparison

Comparison Rules and Methodology

• Decoding is performed with reference decoder (H.264/AVC, H.265/HEVC, VP9, AV1). For other standards participants should provide decoder
• We don't limit GOP size and intra-period
• We don't limit number of passes in the encoding. Total encoding time should fulfill use case speed requirements

• Presets for different speed requirements should be provided by the developers
• Codec should allow to set arbitrary bitrate of resulting stream in constant quality mode
• Preferable codec interface - console codec version (with batch processing support - bitrate and file names must be possible to assign from the command line)
• Encoder should be compatible with reference decoder, for encoders of custom standards a decoder should be provided

• Codec files (CLI executable file is preferable)
• Codec's presets

1. Prepare encoder. After your application, we send you instructions on how to prepare encoding presets for this year testing use cases (there are limitations for speed) and login for a submission system.
2. Submission. You send us encoder and presets (our hardware characteristics can be found on the comparison page). Testing methodology is described in presentation.
3. Speed and quality pre-check. We test the speed of your encoder. We let you know if some speedup is needed or any bugs are found. If the requirements are not satisfied, you submit an updated version and we test it again. Finally, when all requirements are satisfied, you confirm the usage of presets and encoder.
4. Measurements. We perform the main measurements on this year test video set and prepare a draft of the report. This will take about 1-3 months depending on the number of participants.
5. Draft report and verification. We send you a draft report with your results and the results of other public participants. You can double-check the results. If you participate privately, in this step you will need to decide whether you will publish your results.
6. Report release. After your confirmation, we prepare and publish the final report on the comparison page. We send you the Enterprise version of the report (with all sequences, charts, etc.).

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