[FFmpeg-user] PGM files are loading extremely slow

Michael Koch astroelectronic at t-online.de
Sat Apr 27 01:41:38 EEST 2019 

Hi,

I'd like to report a problem when loading large PGM files, which are 
required for the remap filter.
These files are loading extremely slow in the latest ffmpeg version. 
Much slower than a few weeks before.
I found out that the problem began between April 10 and 11.

The PGM file that I used for testing can be downloaded here:
https://trac.ffmpeg.org/wiki/RemapFilter


This is the last good ffmpeg version from 2019 April 10, execution time 
is less than 1 second:

C:\ffmpeg_alt>ffmpeg -i xmap_samsung_gear_2560x1280.pgm -t 1 -y test1.mp4
ffmpeg version N-93548-g4d2f62150d Copyright (c) 2000-2019 the FFmpeg 
developers

   built with gcc 8.2.1 (GCC) 20190212
   configuration: --enable-gpl --enable-version3 --enable-sdl2 
--enable-fontconfi
g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d 
--enable-libb
luray --enable-libfreetype --enable-libmp3lame 
--enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus 
--enable-libshine --e
nable-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 --enab
le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc 
--enable-libmysofa --en
able-libspeex --enable-libxvid --enable-libaom --enable-libmfx 
--enable-amf --en
able-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc 
--enable-nvdec --e
nable-dxva2 --enable-avisynth --enable-libopenmpt
   libavutil      56. 26.100 / 56. 26.100
   libavcodec     58. 48.101 / 58. 48.101
   libavformat    58. 27.100 / 58. 27.100
   libavdevice    58.  7.100 / 58.  7.100
   libavfilter     7. 48.100 /  7. 48.100
   libswscale      5.  4.100 /  5.  4.100
   libswresample   3.  4.100 /  3.  4.100
   libpostproc    55.  4.100 / 55.  4.100
[pgm_pipe @ 00000000004902c0] Stream #0: not enough frames to estimate 
rate; con
sider increasing probesize
Input #0, pgm_pipe, from 'xmap_samsung_gear_2560x1280.pgm':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: pgm, gray16le, 2560x1280, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
   Stream #0:0 -> #0:0 (pgm (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0000000002b0c2c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 
SSE4.2
AVX FMA3 BMI2 AVX2
[libx264 @ 0000000002b0c2c0] profile Progressive High 10, level 5.0, 
4:0:0, 10-b
it
[libx264 @ 0000000002b0c2c0] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 
AVC cod
ec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: 
cabac=1 r
ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 
psy_rd=1.00:0.00 mixed
_ref=1 me_range=16 chroma_me=0 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 
fast_pski
p=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 
nr=0 deci
mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 
b_pyramid=2 b_
adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 
keyint_min=2
5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 
qcomp=0.6
0 qpmin=0 qpmax=81 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'test1.mp4':
   Metadata:
     encoder         : Lavf58.27.100
     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), gray10le, 
2560x1280,
  q=-1--1, 25 fps, 12800 tbn, 25 tbc
     Metadata:
       encoder         : Lavc58.48.101 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=    1 fps=0.0 q=40.0 Lsize=       4kB time=00:00:00.00 
bitrate=421128.2kbi
ts/s speed=0.000557x
video:3kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB 
muxing ove
rhead: 24.198427%
[libx264 @ 0000000002b0c2c0] frame I:1     Avg QP:25.75  size:  2617
[libx264 @ 0000000002b0c2c0] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0000000002b0c2c0] 8x8 transform intra:0.0%
[libx264 @ 0000000002b0c2c0] coded y intra: 0.0%
[libx264 @ 0000000002b0c2c0] i16 v,h,dc,p: 93%  6%  1%  0%
[libx264 @ 0000000002b0c2c0] i8c dc,h,v,p: 100%  0%  0%  0%
[libx264 @ 0000000002b0c2c0] kb/s:523.40



This is the first bad ffmpeg version from 2019 April 11, execution time 
is about 18 seconds:

C:\ffmpeg_alt>ffmpeg -i xmap_samsung_gear_2560x1280.pgm -t 1 -y test1.mp4
ffmpeg version N-93554-gce92ee4b4f Copyright (c) 2000-2019 the FFmpeg 
developers

   built with gcc 8.2.1 (GCC) 20190212
   configuration: --enable-gpl --enable-version3 --enable-sdl2 
--enable-fontconfi
g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d 
--enable-libb
luray --enable-libfreetype --enable-libmp3lame 
--enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus 
--enable-libshine --e
nable-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 --enab
le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc 
--enable-libmysofa --en
able-libspeex --enable-libxvid --enable-libaom --enable-libmfx 
--enable-amf --en
able-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc 
--enable-nvdec --e
nable-dxva2 --enable-avisynth --enable-libopenmpt
   libavutil      56. 26.100 / 56. 26.100
   libavcodec     58. 48.101 / 58. 48.101
   libavformat    58. 27.100 / 58. 27.100
   libavdevice    58.  7.100 / 58.  7.100
   libavfilter     7. 48.100 /  7. 48.100
   libswscale      5.  4.100 /  5.  4.100
   libswresample   3.  4.100 /  3.  4.100
   libpostproc    55.  4.100 / 55.  4.100
[pgm_pipe @ 00000000004102c0] Stream #0: not enough frames to estimate 
rate; con
sider increasing probesize
Input #0, pgm_pipe, from 'xmap_samsung_gear_2560x1280.pgm':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: pgm, gray16le, 2560x1280, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
   Stream #0:0 -> #0:0 (pgm (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0000000002e5c2c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 
SSE4.2
AVX FMA3 BMI2 AVX2
[libx264 @ 0000000002e5c2c0] profile Progressive High 10, level 5.0, 
4:0:0, 10-b
it
[libx264 @ 0000000002e5c2c0] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 
AVC cod
ec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: 
cabac=1 r
ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 
psy_rd=1.00:0.00 mixed
_ref=1 me_range=16 chroma_me=0 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 
fast_pski
p=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 
nr=0 deci
mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 
b_pyramid=2 b_
adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 
keyint_min=2
5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 
qcomp=0.6
0 qpmin=0 qpmax=81 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'test1.mp4':
   Metadata:
     encoder         : Lavf58.27.100
     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), gray10le, 
2560x1280,
  q=-1--1, 25 fps, 12800 tbn, 25 tbc
     Metadata:
       encoder         : Lavc58.48.101 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=    1 fps=0.0 q=40.0 Lsize=       4kB time=00:00:00.00 
bitrate=421128.2kbi
ts/s speed=0.000709x
video:3kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB 
muxing ove
rhead: 24.198427%
[libx264 @ 0000000002e5c2c0] frame I:1     Avg QP:25.75  size:  2617
[libx264 @ 0000000002e5c2c0] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0000000002e5c2c0] 8x8 transform intra:0.0%
[libx264 @ 0000000002e5c2c0] coded y intra: 0.0%
[libx264 @ 0000000002e5c2c0] i16 v,h,dc,p: 93%  6%  1%  0%
[libx264 @ 0000000002e5c2c0] i8c dc,h,v,p: 100%  0%  0%  0%
[libx264 @ 0000000002e5c2c0] kb/s:523.40


Michael

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