[FFmpeg-user] PSNR for lossless JPEG2000 doesn't match

Tue Jul 16 23:39:46 EEST 2019

On 7/16/19, Elliott Balsley <elliottbalsley at gmail.com> wrote:
> Hello.  I’m trying to encode a v210 AVI to lossless JPEG2000.  I believe
> libopenjpeg defaults to the lossless profile.  When I use -psnr while
> encoding, it shows inf, that’s good.  But when I run -filter_complex psnr on
> the encoded file it shows different values.
>
> From the documentation, I know the output of the psnr filter averages the
> MSE of all frames.  I don’t know how the -psnr flag works, is that also an
> average, or is just showing the PSNR of one frame?
>
> Full command-line output below, first from the encode, then from the
> comparison.
>
> D:\temp>ffmpeg -i 1920x1080p23.97_YUV422_Legal_60s.avi -c:v libopenjpeg
> -psnr -an openjpeg.mxf
> ffmpeg version N-94303-g7cb4f8c962 Copyright (c) 2000-2019 the FFmpeg
> developers
>   built with gcc 9.1.1 (GCC) 20190716
>   configuration: --enable-gpl --enable-version3 --enable-sdl2
> --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
> --enable-libdav1d --enable-libbluray --enable-libfreetype
> --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy
> --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx
> --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
> --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
> --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
> --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
> --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid
> --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2
> --enable-avisynth --enable-libopenmpt
>   libavutil      56. 30.100 / 56. 30.100
>   libavcodec     58. 53.101 / 58. 53.101
>   libavformat    58. 28.102 / 58. 28.102
>   libavdevice    58.  7.100 / 58.  7.100
>   libavfilter     7. 56.101 /  7. 56.101
>   libswscale      5.  4.101 /  5.  4.101
>   libswresample   3.  4.100 /  3.  4.100
>   libpostproc    55.  4.100 / 55.  4.100
> [avi @ 0000018978058c80] non-interleaved AVI
> [avi @ 0000018978058c80] Stream #0: not enough frames to estimate rate;
> consider increasing probesize
> Guessed Channel Layout for Input Stream #0.1 : stereo
> Input #0, avi, from '1920x1080p23.97_YUV422_Legal_60s.avi':
>   Duration: 00:01:00.06, start: 0.000000, bitrate: 1063058 kb/s
>     Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le, 1920x1080,
> 1061360 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
>     Stream #0:1: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, stereo,
> s32 (24 bit), 2304 kb/s
> Stream mapping:
>   Stream #0:0 -> #0:0 (v210 (native) -> jpeg2000 (libopenjpeg))
> Press [q] to stop, [?] for help
> [mxf @ 000001897805a1c0] 417083/10000000 input time base matched 1001/24000
> container time base
> Output #0, mxf, to 'openjpeg.mxf':
>   Metadata:
>     encoder         : Lavf58.28.102
>     Stream #0:0: Video: jpeg2000 (libopenjpeg), yuv422p10le, 1920x1080,
> q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc
>     Metadata:
>       encoder         : Lavc58.53.101 libopenjpeg
> frame= 1440 fps=6.8 q=-0.0 LPSNR=Y:inf U:inf V:inf *:inf size= 2861957kB
> time=00:01:00.06 bitrate=390362.1kbits/s speed=0.285x
> video:2860792kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: 0.040706%
>
>
>
>
> D:\temp>ffmpeg -i 1920x1080p23.97_YUV422_Legal_60s.avi -i openjpeg.mxf -an
> -filter_complex "psnr" -f null -
> ffmpeg version N-94303-g7cb4f8c962 Copyright (c) 2000-2019 the FFmpeg
> developers
>   built with gcc 9.1.1 (GCC) 20190716
>   configuration: --enable-gpl --enable-version3 --enable-sdl2
> --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
> --enable-libdav1d --enable-libbluray --enable-libfreetype
> --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy
> --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx
> --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
> --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
> --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
> --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
> --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid
> --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2
> --enable-avisynth --enable-libopenmpt
>   libavutil      56. 30.100 / 56. 30.100
>   libavcodec     58. 53.101 / 58. 53.101
>   libavformat    58. 28.102 / 58. 28.102
>   libavdevice    58.  7.100 / 58.  7.100
>   libavfilter     7. 56.101 /  7. 56.101
>   libswscale      5.  4.101 /  5.  4.101
>   libswresample   3.  4.100 /  3.  4.100
>   libpostproc    55.  4.100 / 55.  4.100
> [avi @ 0000022c13af98c0] non-interleaved AVI
> [avi @ 0000022c13af98c0] Stream #0: not enough frames to estimate rate;
> consider increasing probesize
> Guessed Channel Layout for Input Stream #0.1 : stereo
> Input #0, avi, from '1920x1080p23.97_YUV422_Legal_60s.avi':
>   Duration: 00:01:00.06, start: 0.000000, bitrate: 1063058 kb/s
>     Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le, 1920x1080,
> 1061360 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
>     Stream #0:1: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, stereo,
> s32 (24 bit), 2304 kb/s
> Input #1, mxf, from 'openjpeg.mxf':
>   Metadata:
>     operational_pattern_ul: 060e2b34.04010101.0d010201.01010900
>     uid             : adab4424-2f25-4dc7-92ff-29bd000c0000
>     generation_uid  : adab4424-2f25-4dc7-92ff-29bd000c0001
>     company_name    : FFmpeg
>     product_name    : OP1a Muxer
>     product_version : 58.28.102
>     product_uid     : adab4424-2f25-4dc7-92ff-29bd000c0002
>     material_package_umid:
> 0x060A2B340101010501010D001309998F529471341F09998F00529471341F0900
>     timecode        : 00:00:00:00
>   Duration: 00:01:00.06, start: 0.000000, bitrate: 390362 kb/s
>     Stream #1:0: Video: jpeg2000, yuv422p10le(progressive), 1920x1080,
> lossless, 23.98 tbr, 23.98 tbn, 23.98 tbc
>     Metadata:
>       file_package_umid:
> 0x060A2B340101010501010D001309998F529471341F09998F00529471341F0901
> Stream mapping:
>   Stream #0:0 (v210) -> psnr:main
>   Stream #1:0 (jpeg2000) -> psnr:reference
>   psnr -> Stream #0:0 (wrapped_avframe)
> Press [q] to stop, [?] for help
> Output #0, null, to 'pipe:':
>   Metadata:
>     encoder         : Lavf58.28.102
>     Stream #0:0: Video: wrapped_avframe, yuv422p10le, 1920x1080, q=2-31, 200
> kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default)
>     Metadata:
>       encoder         : Lavc58.53.101 wrapped_avframe
> [null @ 0000022c17ceec40] Application provided invalid, non monotonically
> increasing dts to muxer in stream 0: 1439 >= 1439
> frame= 1441 fps= 19 q=-0.0 Lsize=N/A time=00:01:00.05 bitrate=N/A
> speed=0.776x
> video:754kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: unknown
> [Parsed_psnr_0 @ 0000022c29ab7680] PSNR y:30.477769 u:37.424566 v:37.127359
> average:32.663307 min:26.866594 max:inf

One command gives 1440 frames the other one gives 1441.
That is the difference I think.