This snapshot version was fetched from AOM AV1 repository when the AV1 specification was officially released on March 28, 2018. Here are details on the three codecs used in our test: Table 1 lists the video codec versions used in our test setup.
For H.264/AVC and VP9 encodings, we used ffmpeg version 3.3.3, with corresponding libx264 and libvpx-vp9 libraries. Scatter plots of spatial and temporal information (median) for 400 FB top videos Encoder Implementationsįor AV1 encodings, we used a snapshot version of AOM AV1 reference software. Scatter plots of spatial and temporal information (max) for 400 FB top videos Figure 1b. The plots show a wide spread of content coverage, including slow/fast motion and low/high spatial complexity. This content analysis is useful to show the relative spatial information and temporal information found in the various videos available, since the compression difficulty is directly related to the spatial and temporal information of a video.ĭue to scene change within the video, except for the maximum values of the standard deviation as recommended in ITU-T P.910, the median values of spatial and temporal information are also calculated:įigure 1 shows scatter plots of the spatial and temporal information for all 400 FB top videos (the first 10 seconds). To measure the representation of these videos, the content analysis was conducted according to ITU-T P.910 Subjective video quality assessment methods for multimedia applications. Again, this approach allowed us to gauge how AV1 would perform in a real-world production environment. The already-compressed test content was decompressed first and then re-compressed by all tested encoders.
Instead of using uncompressed test video sequences, such as common test sequences in video standard quality evaluation or public test sequences in, our experiment selected 400 top-viewed public videos from Facebook (FB) Pages. The specifics of our testing process and results below will help engineers evaluate AV1 compression performance in detail. With the official public release of AV1 on March 28, 2018, these results should foster confidence that the technology is capable of significant gains in compression in real-world implementations. But because AV1’s performance increased as video resolution increased, we conclude the new compression codec will likely deliver even higher efficiency gains with UHD/4K and 8K content. Our tests were conducted primarily with Standard Definition (SD) and High Definition (HD) video files, because those are currently the most popular video formats on Facebook. current alternatives, however, due to increased complexity.
The new codec requires longer encoding times vs. Our testing shows AV1 surpasses its stated goal of 30% better compression than VP9, and achieves gains of 50.3%, 46.2% and 34.0%, compared to x264 main profile, x264 high profile and libvpx-vp9, respectively. In designing our comparison tests, we aligned our approach closely to previous work by Netflix, comparing x264, x265 and libvpx. By structuring the test this way, we were able to show how the codec will perform in a true production environment compared with current widely used alternatives, such as x264 and libvpx-vp9.
#PLAY CLAW 5 COMPRESSED CODEC SOFTWARE#
standard reference software encoders (i.e., H.264/AVC Joint Model or JM). practical open source video encoders that can be deployed to a practical production system, rather than merely testing efficiency vs. We tested the new codec under conditions that closely match the most common real-world use cases for Facebook video. The Alliance for Open Media - a consortium founded in 2015 and made up of video-on-demand providers including Amazon, Facebook, Google, Microsoft and Netflix, along with web browser developers and semiconductor firms - has just released AV1 (also known as AOMedia Video 1), a new open, royalty-free video format that promises to be a significant step forward in compression efficiency.
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Everything from 4K movie streaming to smartphone video chat to laptop screen sharing can be enhanced by making the video files smaller through better compression codecs. Improved video compression is important for delivering digital video files more quickly and with higher quality, while using less bandwidth and storage.
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