hi, The maximum code rate set by h264_nvenc encoder for 4K coding is 140 mb. Program error occurs when the code rate exceeds 140 mb：[h264_nvenc @ 0000017e632de440] InitializeEncoder failed: invalid param (8). How to Set the Bit Rate to 500MB in 4K Coding? ffmpeg.exe -i L:\1.mp4 -c:v h264_nvenc -b:v 500000k -g 25 -c:a aac -f mp4 l:\test500mb.mp4 -y ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers libavutil 56. 14.100 / 56. 14.100 libavcodec 58. 18.100 / 58. 18.100 libavformat 58. 12.100 / 58. 12.100 libavdevice 58. 3.100 / 58. 3.100 libavfilter 7. 16.100 / 7. 16.100 libswscale 5. 1.100 / 5. 1.100 libswresample 3. 1.100 / 3. 1.100 libpostproc 55. 1.100 / 55. 1.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'L:\1.mp4': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf58.12.100 Duration: 00:01:08.60, start: 0.000000, bitrate: 18142 kb/s Stream #0:0(eng): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, unknown/bt2020/unknown), 3840x2160 [SAR 1:1 DAR 16:9], 11996 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default) Metadata: handler_name : DataHandler Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 7.1, s16, 6144 kb/s (default) Metadata: handler_name : DataHandler Stream mapping: Stream #0:0 -> #0:0 (hevc (native) -> h264 (h264_nvenc)) Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native)) Press [q] to stop, [?] for help [h264_nvenc @ 0000017e632de440] InitializeEncoder failed: invalid param (8) Error 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 [aac @ 0000017e6322b700] Qavg: 45469.547 [aac @ 0000017e6322b700] 2 frames left in the queue on closing -- 成都东方盛行电子有限责任公司 研发中心 冯良怀 2019年7月4日 ADD：成都高新区天华二路81号天府软件园C区C10号楼9楼 P C：610041 TEL:028-85441107-891\892 HTTP：www.ds.net.cn
On Thu, 4 Jul 2019 at 12:34, 冯良怀 <flhcd@163.com> wrote:
hi, The maximum code rate set by h264_nvenc encoder for 4K coding is 140 mb. Program error occurs when the code rate exceeds 140 mb：[h264_nvenc @ 0000017e632de440] InitializeEncoder failed: invalid param (8). How to Set the Bit Rate to 500MB in 4K Coding?
ffmpeg.exe -i L:\1.mp4 -c:v h264_nvenc -b:v 500000k -g 25 -c:a aac -f mp4 l:\test500mb.mp4 -y ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers libavutil 56. 14.100 / 56. 14.100 libavcodec 58. 18.100 / 58. 18.100 libavformat 58. 12.100 / 58. 12.100 libavdevice 58. 3.100 / 58. 3.100 libavfilter 7. 16.100 / 7. 16.100 libswscale 5. 1.100 / 5. 1.100 libswresample 3. 1.100 / 3. 1.100 libpostproc 55. 1.100 / 55. 1.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'L:\1.mp4': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf58.12.100 Duration: 00:01:08.60, start: 0.000000, bitrate: 18142 kb/s Stream #0:0(eng): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, unknown/bt2020/unknown), 3840x2160 [SAR 1:1 DAR 16:9], 11996 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default) Metadata: handler_name : DataHandler Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 7.1, s16, 6144 kb/s (default) Metadata: handler_name : DataHandler Stream mapping: Stream #0:0 -> #0:0 (hevc (native) -> h264 (h264_nvenc)) Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native)) Press [q] to stop, [?] for help [h264_nvenc @ 0000017e632de440] InitializeEncoder failed: invalid param (8) Error 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 [aac @ 0000017e6322b700] Qavg: 45469.547 [aac @ 0000017e6322b700] 2 frames left in the queue on closing
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成都东方盛行电子有限责任公司
研发中心 冯良怀
2019年7月4日
ADD：成都高新区天华二路81号天府软件园C区C10号楼9楼
P C：610041
TEL:028-85441107-891\892
HTTP：www.ds.net.cn
NVENC's encoder bitrate limit is 50M. You cannot initialize the encoder with values for -b:v, -maxrate:v or -bufsize:v exceeding 50M. I believe the same also applies to Intel's implementations (QuickSync and VAAPI).
participants (2)
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Dennis Mungai -
冯良怀