Hi, I've compiled ffmpeg with nvenc (with sdk 6.0.1) and encoded a sample movie with nvenc_hevc in .TS container (my TV only supports hevc in a TS container...). Plays fine on VLC / PC, but very poorly on that LG TV- the picture is messed up with macroblock issues all over the place and stutters. Tried with X265 with perfect output so not an issue of the TV not really supporting HEVC.
The same sample encoded with nvenc_h264 plays smoothly, no problem. although I've noticed that if I attempt to change the frame rate - r from the original, I get some of the same issues. Spent weeks trying to resolve / haven't found anything like this on forum and am desperate for any help ... Things I've already tried: - resize from 1080p to various lower sizes - frame rate from 20 fps to 30 fps - HEVC levels 4.1 to 5.0 - preset ultrafast - no audio - lower and higher bitrates 1500k to 16000k - constant quantizer with -aq - CRF 10 to 25 (btw that parameter doesn't seem to work) - set GOP to 250 and tried -bf 0 to 4 (only works with 0..) - streaming from NAS and USB key ... I have also tried to compare the samples encoded with nvenc_hevc, nvenc_h264 and x265 using a demo version of Elecard StreamEye - there's a lot in there I'm not familiar with but one big difference between the file not working and the other two : the stream structure for the file encoded with nvenc_hevc does not contain access unit delimiters while the others have plenty (one in between each frame). I wonder if it could be a reason for my problem ... but then again maybe not. looks like the only ffmpeg option to set those applies only to libx264 (-aud)... NVENC_HEVC stream structure: video_parameters_set () seq_parameter_set() pic_parameter_set() slice_segment_layer() slice_segment_layer_rbsp() { TRAIL_R} .... slice_segment_layer_rbsp() { TRAIL_R} x265 stream structure: video_parameters_set () seq_parameter_set() sei_prefix() pic_parameter_set() slice_segment_layer() access_unit_delimiter() slice_segment_layer_rbsp() { TRAIL_R} access_unit_delimiter() .... access_unit_delimiter() slice_segment_layer_rbsp() { TRAIL_R} command line / console output: "G:\Ubuntu\ffmpeg" -i "sample.mp4" -y -b:v 9500k -c:v nvenc_hevc -preset slow -level 4.1 -r 24000/1001 -c:a aac -aq 128k -c:s copy "sample.ts" ffmpeg version N-78227-gae5b2c5 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 5.3.0 (GCC) configuration: --arch=x86_64 --target-os=mingw32 --cross-prefix=/home/zheer/Desktop/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-x86_64/bin/x86_64-w64-mingw32- --pkg-config=pkg-config --disable-w32threads --enable-gpl --enable-libsoxr --enable-fontconfig --enable-libass --enable-libutvideo --enable-libbluray --enable-iconv --enable-libtwolame --extra-cflags=-DLIBTWOLAME_STATIC --enable-libzvbi --enable-libcaca --enable-libmodplug --extra-libs=-lstdc++ --extra-libs=-lpng --enable-libvidstab --enable-libx265 --enable-decklink --extra-libs=-loleaut32 --enable-libx264 --enable-libxvid --enable-libmp3lame --enable-version3 --enable-zlib --enable-librtmp --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libopenjpeg --enable-gnutls --enable-libgsm --enable-libfreetype --enable-libopus --enable-frei0r --enable-filter=frei0r --enable-bzlib --enable-libxavs --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-libschroedinger --enable-libvpx --enable-libilbc --enable-libwavpack --enable-libwebp --enable-libgme --enable-dxva2 --enable-libdcadec --enable-avisynth --enable-gray --enable-libopenh264 --extra-libs=-lpsapi --extra-cflags= --enable-static --disable-shared --prefix=/home/zheer/Desktop/ffmpeg-windows-build-helpers/sandbox/cross_compilers/mingw-w64-x86_64/x86_64-w64-mingw32 --enable-nonfree --enable-libfdk-aac --disable-libfaac --enable-nvenc --enable-runtime-cpudetect libavutil 55. 16.101 / 55. 16.101 libavcodec 57. 24.101 / 57. 24.101 libavformat 57. 23.101 / 57. 23.101 libavdevice 57. 0.101 / 57. 0.101 libavfilter 6. 27.100 / 6. 27.100 libswscale 4. 0.100 / 4. 0.100 libswresample 2. 0.101 / 2. 0.101 libpostproc 54. 0.100 / 54. 0.100 [h264 @ 000001aa97e504c0] sps_id 1 out of range Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 title : BLU-RAY 3D encoder : Lavf57.20.100 Duration: 00:01:00.00, start: 0.010000, bitrate: 43891 kb/s Chapter #0:0: start 0.000000, end 60.000000 Metadata: title : Chapter 02 Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 39990 kb/s, 23.98 fps, 23.98 tbr, 16k tbn, 47.95 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(fra): Audio: dts (DTS-HD MA) (mp4a / 0x6134706D), 48000 Hz, 5.1(side), s32p (24 bit), max. 4486 kb/s (default) Metadata: handler_name : SoundHandler Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s Metadata: handler_name : SubtitleHandler Output #0, mpegts, to 'sample.ts': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 title : BLU-RAY 3D encoder : Lavf57.23.101 Chapter #0:0: start 0.000000, end 59.990000 Metadata: title : Chapter 02 Stream #0:0(eng): Video: hevc (nvenc_hevc) (Main), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 9500 kb/s, 23.98 fps, 90k tbn, 23.98 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc57.24.101 nvenc_hevc Side data: unknown side data type 10 (24 bytes) Stream #0:1(fra): Audio: aac (LC), 48000 Hz, 5.1(side), fltp (24 bit), 128 kb/s (default) Metadata: handler_name : SoundHandler encoder : Lavc57.24.101 aac Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s Metadata: handler_name : SubtitleHandler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> hevc (nvenc_hevc)) Stream #0:1 -> #0:1 (dts (dca) -> aac (native)) Stream #0:2 -> #0:2 (copy) Press [q] to stop, [?] for help [h264 @ 000001aa97f128e0] sps_id 1 out of range [h264 @ 000001aa985ca860] sps_id 1 out of range [h264 @ 000001aa97f1c700] sps_id 1 out of range00:00:02.15 bitrate= 0.0kbits/s speed=4.28x .... [h264 @ 000001aa97f128e0] sps_id 1 out of range=00:00:57.32 bitrate=8609.9kbits/s speed=2.99x [h264 @ 000001aa985ca860] sps_id 1 out of range=00:00:58.83 bitrate=8654.5kbits/s speed=2.99x [h264 @ 000001aa97f1c700] sps_id 1 out of range frame= 1417 fps= 70 q=-0.0 Lsize= 76596kB time=00:01:00.01 bitrate=10454.7kbits/s speed=2.97x video:68842kB audio:1970kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 8.168465% [aac @ 000001aa97e54ba0] Qavg: 15104392.000 _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user