Is it not possible to convert HEVC back to H264? Provided device doesn't support required NVENC featuresĮrror initializing output stream 0:0 - Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height Now I am wondering is it not possible to fully hw transcode HEVC to H264?Ĭode used: ffmpeg -timeout 10000000 -reconnect 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 2 -hwaccel_device 0 -hwaccel cuvid -vcodec hevc_cuvid -resize 1920x1080 -i ' -max_muxing_queue_size 1024 -map 0:0 -map 0:2 -acodec libfdk_aac -b:a 96k -c:v h264_nvenc -gpu 0 -preset llhq -profile high -rc:v vbr -qmin:v 26 -qmax:v 32 -b:v 4M -maxrate 4M -bufsize 8M -threads 0 -r 25 -g 100 -f mpegts 'udp://127.0.0.1:6472' HEVC 4K to HEVC 1080p works but when I try hevc to h264 i get "No NVENC capable devices found" If you are unsure which one to download, then use the 32-bit one.I try to transcode a HEVC 4k broadcast down to 1080p H264. The easiest way to get the latest and most functional version of ffmpeg is to download the statically linked builds.ĭownload either the 32-bit or 64-bit. The good news for Linux users is that the H.265 codec is available in the popular encoding suite “ffmpeg.” Although ffmpeg probably exists in your distro’s repositories, it might be out of date or it might not have support for H.265 compiled in.
Alternately, it means that the quality of the video can be substantially improved at the same bit rate, something very important for very high definition (i.e. This means that video at the same quality needs only half of the bandwidth (or file size). H.265 doubles the data compression ratio compared to H.264 and can support resolutions up to 8192×4320. MPEG-H/H.265: The next generation encoding format with support for 4K and 8K resolutionsĪfter H.264 came H.265. It also has a few other names, most commonly High Efficiency Video Coding (HEVC) or MPEG-H.MPEG-2/H.262: Used for DVD and other digital mediums.MP3: Part of the MPEG-1 standard, ubiquitous today.After DVD came Blu-ray, which as well as supporting videos encoded in MPEG-2, also supported H.264 or MPEG-4 Part 10, Advanced Video Coding (MPEG-4 AVC) as it was officially known.
MPEG-2 was also ratified by the International Telecommunication Union (ITU) as H.262. It was also used as the underlying video standard for digital satellite (DVB-S) and digital terrestrial TV (DVB-T).
After MPEG-1 came MPEG-2, which was chosen as the video compression standard for DVD video.
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