FFmpeg h264_nvenc interlaced encode

Professional Graphics and Rendering Video Technologies Video Codec and Optical Flow SDK
#1

Hello,

I trying transcode h264 interlaced video file with h264_nvenc codec and want keep interlacing.
I using ffmpeg 3.2 and NVENC 7:

ffmpeg version 3.2 Copyright © 2000-2016 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
configuration: --cpu=native --enable-pthreads --enable-bzlib --enable-libdc1394 --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-libfdk-aac --enable-nonfree --enable-gpl --enable-swscale --enable-libcdio --enable-x11grab --enable-libx264 --enable-libxvid --enable-libopencore-amrnb --enable-version3 --enable-libopencore-amrwb --enable-version3 --enable-version3 --enable-libvo-amrwbenc --enable-version3 --enable-nvenc

ffmpeg -i source.mpg -vcodec h264_nvenc -flags +ildct+ilme -acodec copy -f mpegts out.mpg

And receidev the following video:

720×576

But I have no problems with libx264 codec.

Is ffmpeg supported interlaced encoding via nvenc? Or my ffmpeg command is incorrect?

#2

Hello.

This same in device Quadro M4000.

So, this possible set interlace TFF in ffmpeg + nvenc encoder ?

#3

It’s an issue with new video drivers. Everything is fine with video driver 361.28 and lower.
I already sent this issue to NVIDIA Support with Reference Number 161118-000164

#4

I tested Cuda 8.0, version nvidia from 367.42 to 375.20, ffmpeg 3.2 and ffmpeg git version in today. (–enable-cuda --enable-cuvid --enable-rpath --enable-nvenc)

run ffmpeg with options “-flags:v +ildct -top 1”

My picture is bad, showing this same what in post #1.

My Video M4000 , OS Ubuntu 14.04.05

Support Nvidia, please help find solution.

#5

This issue is root-caused and fix will be available in our next driver branch (due out in February 2017). Thank you for reporting the issue.

#6

This issue has been fixed in the new 375.39 driver. Thanks!

#7

Hi, are there plans to fix the issue in the legacy 367.xx series? We’re using AWS G2 instances with GRID K520 GPU and if I try to install 375.39 or 375.13 the installer fails with:
‘’’
The NVIDIA GRID K520 GPU installed in this system is supported through the NVIDIA 367.xx legacy Linux graphics drivers. Please visit http://www.nvidia.com/object/unix.html for more information. The 378.13 NVIDIA Linux graphics driver will ignore this GPU.
‘’’
The latest available 367.57 still shows the issue.

Thanks,

#8

Hi, is there any plan to release R375+ driver or to fix the R367 driver for NVIDIA GUID K520 GPU? We are using AWS G2 instance and experiencing exactly same issue at the moment.

#9

i have the same problem in my Quadro GP100 and driver 430.40

#10

Hi sva083,
Can you confirm this is a regression and which ffmpeg command line you are using?

Thanks.

#11

if i add option -flags:v +ildct for output then all interlaced frames are discarded
and video doesn’t play

/usr/local/bin/ffmpeg -buffer_size 131072 -fifo_size 120000 -overrun_nonfatal 1 -i udp://239.192.1.21:1234 -y -sn -dn -vcodec h264_nvenc -flags:v +ildct -acodec aac -hls_time 10 -map 0 -ignore_unknown -strict -2 -use_localtime 1 -use_localtime 1 -use_localtime_mkdir 1 -preset:v fast -profile:v main -rc:v cbr -b:v 3M -maxrate:v 4M -bufsize:v 16M -hls_segment_filename /store/records/TVK/%Y/%m/%d/%H/%s.ts /hls/tmp/TVK.m3u8

#12

what news? if i use libx264 all intarlaced frames are output…

#13

We are not able to reproduce this issue on GP100 + Ubuntu 18.04 + 430.40 + FFMPEG 4.1.4

Can you try with minimal ffmpeg command line options and see if this is still an issue, e.g.
./ffmpeg -i ~/decode_clips/h264/big_buck_bunny_1920x1080_420_8_14400.h264 -vcodec h264_nvenc -flags +ildct -acodec copy -f mpegts out.mpg

#14

Are you sure this file contains interlaced frames?

#15

show me output for this command:

ffprobe -show_frames ./big_buck_bunny_1920x1080_420_8_14400.h264 | grep inter | wc -l

and for out.mpg

ffprobe -show_frames ./out.mpg | grep inter | wc -l

#16

For the command line mentioned in comment #13, input used is progressive h264 and encoded output is interlaced. ffprobe shows interlaced_frame=1 for each frame of the output.

Thanks.

#17

ok, but problem appears if input file contains interlaced frames!
i don’t know cases than is needed convert prograssive to interlaced, its needed conver interlaced to interlaced!! And this dont work!!