Build the hwdownload filter that brings GPU frames back to system memory.
Always place this immediately before any software filter, and pass the format
the consumer expects — letting ffmpeg auto-negotiate here is a common source
of "no frames" errors.
Build the
hwdownloadfilter that brings GPU frames back to system memory.Always place this immediately before any software filter, and pass the format the consumer expects — letting ffmpeg auto-negotiate here is a common source of "no frames" errors.