Intel Quick Sync (QSV) Hardware Acceleration Not Working with FFmpeg 7.0 on Windows 7/10
Intel Quick Sync Video (QSV) is a hardware acceleration technology developed by Intel for their processors. It allows for faster video decoding, encoding, and filtering. Many users, including the author, have been using Intel Quick Sync with FFmpeg for several years on Windows 7 and 10 without any issues. However, with the release of FFmpeg 7.0, some users have reported that Intel Quick Sync is no longer working.
Understanding Intel Quick Sync (QSV)
Intel Quick Sync Video is a hardware acceleration technology that was first introduced with the Intel Sandy Bridge processors in 2011. It allows for faster video decoding, encoding, and filtering by offloading these tasks to the processor's integrated graphics. This can result in faster processing times and lower CPU usage.
Intel Quick Sync is supported by FFmpeg through the use of the qsv library. This library allows FFmpeg to access the hardware acceleration capabilities of Intel Quick Sync. To use Intel Quick Sync with FFmpeg, you must have a processor that supports Intel Quick Sync and the qsv library installed on your system.
Issues with Intel Quick Sync (QSV) and FFmpeg 7.0
With the release of FFmpeg 7.0, some users have reported that Intel Quick Sync is no longer working. This issue appears to be related to changes in the way that FFmpeg handles hardware acceleration. In previous versions of FFmpeg, hardware acceleration was enabled by default. However, in FFmpeg 7.0, hardware acceleration is disabled by default and must be explicitly enabled.
To enable Intel Quick Sync in FFmpeg 7.0, you must use the -hwaccel_device option followed by the name of the Intel Quick Sync device. For example, the following command will use Intel Quick Sync to transcode a video:
ffmpeg -i input.mp4 -c:v h264_qsv -hwaccel_device qsv output.mp4It is important to note that the name of the Intel Quick Sync device may vary depending on your system. To find the correct name, you can use the following command:
ffmpeg -hwaccelsIntel Quick Sync is a powerful hardware acceleration technology that can significantly improve the performance of video decoding, encoding, and filtering tasks. However, with the release of FFmpeg 7.0, some users have reported issues with Intel Quick Sync. To resolve these issues, you must explicitly enable Intel Quick Sync by using the -hwaccel_device option followed by the name of the Intel Quick Sync device.
References
- Intel Quick Sync Video: https://www.intel.com/content/www/us/en/architecture-and-technology/quick-sync-video.html
- FFmpeg Hardware Acceleration: https://ffmpeg.org/ffmpeg-hwaccels.html
- FFmpeg 7.0 Release Notes: https://ffmpeg.org/ffmpeg-release-notes.html#FFmpeg-7.0