Video group head: Dr. Dmitriy Vatolin Project head: Dr. Dmitriy Kulikov Measurements, analysis: Dr. Mikhail Erofeev, Anastasia Antsiferova, Egor Sklyarov, Alexander Yakovenko, Nickolay Safonov, Alexander Gushin Nikita Alutis
compression.ru	Lomonosov Moscow State University (MSU) Graphics and Media Lab	Dubna International State University	Institute for Information Transmission Problems, Russian Academy of Science

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• 2021 Comparison parts
• New features
• Comparison Rules and Methodology
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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
• 210+ encoders were tested
• More than 35 private reports for codec developers (description of codec's weak and strong points) after public report versions

• Objective measurements
• Subjective analysis
• Encoding time
• Bitrate keeping for evaluating rate-control mechanism
• Speed/Quality trade-off analysis
• Averaged objective results analysis
• Leaders in different use cases

2021 Comparison parts and main points

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

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

1. We send you instructions for choosing presets for this year use cases (there are limitations for speed) and login for submission system.
2. You send us encoder and presets (our hardware characteristics can be found on the comparison page). Testing methodology is described in presentation.
3. We test the speed of your encoder. We let you know if some speedup is needed or any bugs are found. Finally, when all requirements are satisfied, you confirm the usage of presets and encoder.
4. 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. 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. 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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