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  • C# on linux : FFmpeg (FFMediaToolkit) MediaOutput..Video.AddFrame(FrameToImageData(ImageData)) causes program to exit with code 139

    19 mai 2021, par Jan Černý

    In my C# program I have instance of MediaOutput from FFMediaToolkit. It is initialized like this :

    


    MediaOutput buffer = MediaBuilder.CreateContainer(videoPath).WithVideo(new VideoEncoderSettings(width: width,
                height: height, framerate: frameRate,
                codec: VideoCodec.H264)
            ).Create();


    


    When I want to add frame to buffer I use this code :

    


    private static ImageData FrameToImageData(Bitmap bitmap) {
    Rectangle rect = new Rectangle(System.Drawing.Point.Empty, bitmap.Size);
    BitmapData bitLock = bitmap.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
    ImageData bitmapImageData = ImageData.FromPointer(bitLock.Scan0, ImagePixelFormat.Bgr24, bitmap.Size);
    bitmap.UnlockBits(bitLock);
    return bitmapImageData;
}

public void AddFrame(Bitmap frame) {
    buffer.Video.AddFrame(FrameToImageData(frame));
}


    


    But when code reaches buffer.Video.AddFrame(); it exits with code 139 without throwing any exception.

    


    I have two test files and only one is causing it. One is .png file 100x100 and it works fine. The other is .png file 1000x1000 and it makes program exit as soon as it reaches this method.

    


    What exit code 139 means in C# ?
    
How can I diagnose this problem when it is not throwing any exceptions ?
    
How can I fix it ?

    


    Thank you for help. If you need any more information, leave a comment and I will add it soon as possible.

    


    Edit1 :
    
This is my instel drivers :

    


    john@arch-thinkpad ~> yay -Qs intel
local/intel-gmmlib 21.1.1-1
    Intel Graphics Memory Management Library
local/intel-media-driver 21.1.3-1
    Intel Media Driver for VAAPI — Broadwell+ iGPUs
local/intel-media-sdk 21.1.3-1
    API to access hardware-accelerated video on Intel Gen graphics hardware platforms
local/intel-mkl 2020.4.304-1
    Intel Math Kernel Library
local/intel-ucode 20210216-1
    Microcode update files for Intel CPUs
local/intellij-idea-ultimate-edition 2021.1.1-1
    An intelligent IDE for Java, Groovy and other programming languages with advanced refactoring features intensely focused on developer productivity.
local/libmfx 21.1.3-1
    Intel Media SDK dispatcher library
local/libva-intel-driver 2.4.1-1
    VA-API implementation for Intel G45 and HD Graphics family
local/onednn 2.2.2-1
    oneAPI Deep Neural Network Library (oneDNN)
local/tbb 2020.3-1
    High level abstract threading library
local/xf86-video-intel 1:2.99.917+916+g31486f40-1 (xorg-drivers)
    X.org Intel i810/i830/i915/945G/G965+ video drivers


    


    EDIT2 :

    


    [17091.524781] Slimulator[20962]: segfault at 7fd84003a011 ip 00007fd8400cd348 sp 00007ffddd9d7fb8 error 4 in libswscale.so.5.9.100[7fd840062000+75000]
[17091.524791] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17091.524829] audit: type=1701 audit(1621440058.690:188): auid=1000 uid=1000 gid=1000 ses=1 pid=20962 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17091.546116] audit: type=1334 audit(1621440058.713:189): prog-id=61 op=LOAD
[17091.546209] audit: type=1334 audit(1621440058.713:190): prog-id=62 op=LOAD
[17091.546262] audit: type=1334 audit(1621440058.713:191): prog-id=63 op=LOAD
[17091.547395] audit: type=1130 audit(1621440058.713:192): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@6-20996-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17094.458151] audit: type=1131 audit(1621440061.623:193): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@6-20996-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17094.542823] audit: type=1334 audit(1621440061.710:194): prog-id=63 op=UNLOAD
[17094.542832] audit: type=1334 audit(1621440061.710:195): prog-id=62 op=UNLOAD
[17094.542836] audit: type=1334 audit(1621440061.710:196): prog-id=61 op=UNLOAD
[17295.099124] Slimulator[21147]: segfault at 7f555b1de011 ip 00007f555b271348 sp 00007fff48239f48 error 4 in libswscale.so.5.9.100[7f555b206000+75000]
[17295.099132] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17295.099197] audit: type=1701 audit(1621440262.267:197): auid=1000 uid=1000 gid=1000 ses=1 pid=21147 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17295.108536] audit: type=1334 audit(1621440262.277:198): prog-id=64 op=LOAD
[17295.108679] audit: type=1334 audit(1621440262.277:199): prog-id=65 op=LOAD
[17295.108752] audit: type=1334 audit(1621440262.277:200): prog-id=66 op=LOAD
[17295.109589] audit: type=1130 audit(1621440262.277:201): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@7-21181-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17297.322989] audit: type=1131 audit(1621440264.487:202): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@7-21181-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17297.401409] audit: type=1334 audit(1621440264.571:203): prog-id=66 op=UNLOAD
[17297.401421] audit: type=1334 audit(1621440264.571:204): prog-id=65 op=UNLOAD
[17297.401426] audit: type=1334 audit(1621440264.571:205): prog-id=64 op=UNLOAD
[17353.331142] Slimulator[21281]: segfault at 7f35f1fd3011 ip 00007f35f2066348 sp 00007ffe7d1288e8 error 4 in libswscale.so.5.9.100[7f35f1ffb000+75000]
[17353.331160] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17353.331214] audit: type=1701 audit(1621440320.498:206): auid=1000 uid=1000 gid=1000 ses=1 pid=21281 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17353.344382] audit: type=1334 audit(1621440320.511:207): prog-id=67 op=LOAD
[17353.344518] audit: type=1334 audit(1621440320.511:208): prog-id=68 op=LOAD
[17353.344566] audit: type=1334 audit(1621440320.511:209): prog-id=69 op=LOAD
[17353.345651] audit: type=1130 audit(1621440320.511:210): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@8-21378-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17356.180885] audit: type=1131 audit(1621440323.345:211): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@8-21378-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17356.261051] audit: type=1334 audit(1621440323.428:212): prog-id=69 op=UNLOAD
[17356.261055] audit: type=1334 audit(1621440323.428:213): prog-id=68 op=UNLOAD
[17356.261057] audit: type=1334 audit(1621440323.428:214): prog-id=67 op=UNLOAD
[17379.499165] Slimulator[21454]: segfault at 7f68418a1011 ip 00007f6841934348 sp 00007ffea9f22eb8 error 4 in libswscale.so.5.9.100[7f68418c9000+75000]
[17379.499174] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17379.499245] audit: type=1701 audit(1621440346.665:215): auid=1000 uid=1000 gid=1000 ses=1 pid=21454 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17379.509368] audit: type=1334 audit(1621440346.675:216): prog-id=70 op=LOAD
[17379.509448] audit: type=1334 audit(1621440346.675:217): prog-id=71 op=LOAD
[17379.509481] audit: type=1334 audit(1621440346.675:218): prog-id=72 op=LOAD
[17379.510098] audit: type=1130 audit(1621440346.675:219): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@9-21492-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17381.661151] audit: type=1131 audit(1621440348.828:220): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@9-21492-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17381.740919] audit: type=1334 audit(1621440348.908:221): prog-id=72 op=UNLOAD
[17381.740924] audit: type=1334 audit(1621440348.908:222): prog-id=71 op=UNLOAD
[17381.740926] audit: type=1334 audit(1621440348.908:223): prog-id=70 op=UNLOAD
[17389.743524] Slimulator[21565]: segfault at 7f95075a4011 ip 00007f9507637348 sp 00007ffccfab3f18 error 4 in libswscale.so.5.9.100[7f95075cc000+75000]
[17389.743535] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17389.743613] audit: type=1701 audit(1621440356.908:224): auid=1000 uid=1000 gid=1000 ses=1 pid=21565 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17389.753604] audit: type=1334 audit(1621440356.918:225): prog-id=73 op=LOAD
[17389.753783] audit: type=1334 audit(1621440356.918:226): prog-id=74 op=LOAD
[17389.753847] audit: type=1334 audit(1621440356.918:227): prog-id=75 op=LOAD
[17389.755847] audit: type=1130 audit(1621440356.921:228): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@10-21600-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17392.121917] audit: type=1131 audit(1621440359.288:229): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@10-21600-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17392.204160] audit: type=1334 audit(1621440359.371:230): prog-id=75 op=UNLOAD
[17392.204167] audit: type=1334 audit(1621440359.371:231): prog-id=74 op=UNLOAD
[17392.204169] audit: type=1334 audit(1621440359.371:232): prog-id=73 op=UNLOAD
[17409.596374] Slimulator[21674]: segfault at 7fddab4c5011 ip 00007fddab558348 sp 00007ffe55e75e28 error 4 in libswscale.so.5.9.100[7fddab4ed000+75000]
[17409.596383] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17409.596441] audit: type=1701 audit(1621440376.762:233): auid=1000 uid=1000 gid=1000 ses=1 pid=21674 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17409.606014] audit: type=1334 audit(1621440376.772:234): prog-id=76 op=LOAD
[17409.606096] audit: type=1334 audit(1621440376.772:235): prog-id=77 op=LOAD
[17409.606139] audit: type=1334 audit(1621440376.772:236): prog-id=78 op=LOAD
[17409.606845] audit: type=1130 audit(1621440376.772:237): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@11-21706-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17411.977651] audit: type=1131 audit(1621440379.145:238): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@11-21706-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17412.074091] audit: type=1334 audit(1621440379.242:239): prog-id=78 op=UNLOAD
[17412.074098] audit: type=1334 audit(1621440379.242:240): prog-id=77 op=UNLOAD
[17412.074101] audit: type=1334 audit(1621440379.242:241): prog-id=76 op=UNLOAD
[17431.213606] Slimulator[21785]: segfault at 7f218cdca011 ip 00007f218ce5d348 sp 00007ffffd122a98 error 4 in libswscale.so.5.9.100[7f218cdf2000+75000]
[17431.213616] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17431.213648] audit: type=1701 audit(1621440398.378:242): auid=1000 uid=1000 gid=1000 ses=1 pid=21785 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17431.223086] audit: type=1334 audit(1621440398.388:243): prog-id=79 op=LOAD
[17431.223210] audit: type=1334 audit(1621440398.388:244): prog-id=80 op=LOAD
[17431.223272] audit: type=1334 audit(1621440398.388:245): prog-id=81 op=LOAD
[17431.224003] audit: type=1130 audit(1621440398.392:246): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@12-21817-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17433.560362] audit: type=1131 audit(1621440400.725:247): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@12-21817-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17433.620924] audit: type=1334 audit(1621440400.788:248): prog-id=81 op=UNLOAD
[17433.620929] audit: type=1334 audit(1621440400.788:249): prog-id=80 op=UNLOAD
[17433.620931] audit: type=1334 audit(1621440400.788:250): prog-id=79 op=UNLOAD
[17636.068527] audit: type=1701 audit(1621440603.236:251): auid=1000 uid=1000 gid=1000 ses=1 pid=22189 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=6 res=1
[17636.075124] audit: type=1334 audit(1621440603.243:252): prog-id=82 op=LOAD
[17636.075299] audit: type=1334 audit(1621440603.243:253): prog-id=83 op=LOAD
[17636.075334] audit: type=1334 audit(1621440603.243:254): prog-id=84 op=LOAD
[17636.075947] audit: type=1130 audit(1621440603.246:255): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@13-22213-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17636.859400] audit: type=1131 audit(1621440604.030:256): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@13-22213-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17636.952582] audit: type=1334 audit(1621440604.123:257): prog-id=84 op=UNLOAD
[17636.952586] audit: type=1334 audit(1621440604.123:258): prog-id=83 op=UNLOAD
[17636.952587] audit: type=1334 audit(1621440604.123:259): prog-id=82 op=UNLOAD
[17683.442450] Slimulator[22349]: segfault at 7fce7b840011 ip 00007fce7b8d3348 sp 00007ffdf12fde88 error 4 in libswscale.so.5.9.100[7fce7b868000+75000]
[17683.442461] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17683.442489] audit: type=1701 audit(1621440650.613:260): auid=1000 uid=1000 gid=1000 ses=1 pid=22349 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17683.451485] audit: type=1334 audit(1621440650.620:261): prog-id=85 op=LOAD
[17683.451530] audit: type=1334 audit(1621440650.620:262): prog-id=86 op=LOAD
[17683.451561] audit: type=1334 audit(1621440650.620:263): prog-id=87 op=LOAD
[17683.452200] audit: type=1130 audit(1621440650.620:264): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@14-22400-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17685.702716] audit: type=1131 audit(1621440652.873:265): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@14-22400-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17685.789205] audit: type=1334 audit(1621440652.960:266): prog-id=87 op=UNLOAD
[17685.789209] audit: type=1334 audit(1621440652.960:267): prog-id=86 op=UNLOAD
[17685.789211] audit: type=1334 audit(1621440652.960:268): prog-id=85 op=UNLOAD
[17741.587367] audit: type=1701 audit(1621440708.757:269): auid=1000 uid=1000 gid=1000 ses=1 pid=22506 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=6 res=1
[17741.597924] audit: type=1334 audit(1621440708.767:270): prog-id=88 op=LOAD
[17741.597991] audit: type=1334 audit(1621440708.767:271): prog-id=89 op=LOAD
[17741.598017] audit: type=1334 audit(1621440708.767:272): prog-id=90 op=LOAD
[17741.598635] audit: type=1130 audit(1621440708.770:273): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@15-22533-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17743.536566] audit: type=1131 audit(1621440710.707:274): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@15-22533-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[17743.645445] audit: type=1334 audit(1621440710.817:275): prog-id=90 op=UNLOAD
[17743.645456] audit: type=1334 audit(1621440710.817:276): prog-id=89 op=UNLOAD
[17743.645460] audit: type=1334 audit(1621440710.817:277): prog-id=88 op=UNLOAD
[17826.501073] Slimulator[22630]: segfault at 7efff17b2011 ip 00007efff1845348 sp 00007ffe58353908 error 4 in libswscale.so.5.9.100[7efff17da000+75000]
[17826.501081] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[17826.501144] audit: type=1701 audit(1621440793.671:278): auid=1000 uid=1000 gid=1000 ses=1 pid=22630 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[17826.508176] audit: type=1334 audit(1621440793.681:279): prog-id=91 op=LOAD
[17826.508254] audit: type=1334 audit(1621440793.681:280): prog-id=92 op=LOAD
[17826.508285] audit: type=1334 audit(1621440793.681:281): prog-id=93 op=LOAD
[17826.508907] audit: type=1130 audit(1621440793.681:282): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@16-22667-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
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[18255.197203] Slimulator[23128]: segfault at 7f44e8746011 ip 00007f44e87d9348 sp 00007ffdfc25d318 error 4 in libswscale.so.5.9.100[7f44e876e000+75000]
[18255.197213] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[18255.197237] audit: type=1701 audit(1621441222.370:287): auid=1000 uid=1000 gid=1000 ses=1 pid=23128 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[18255.205057] audit: type=1334 audit(1621441222.376:288): prog-id=94 op=LOAD
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[18257.862155] audit: type=1334 audit(1621441225.037:293): prog-id=96 op=UNLOAD
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[18527.198876] Slimulator[23504]: segfault at 7fd59543e011 ip 00007fd5954d1348 sp 00007ffcc5d59e78 error 4 in libswscale.so.5.9.100[7fd595466000+75000]
[18527.198885] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[18527.198911] audit: type=1701 audit(1621441494.371:304): auid=1000 uid=1000 gid=1000 ses=1 pid=23504 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
[18527.207861] audit: type=1334 audit(1621441494.381:305): prog-id=100 op=LOAD
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[18530.192509] audit: type=1131 audit(1621441497.364:309): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@18-23538-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
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[18788.989941] i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on pipe B (start=1126979 end=1126980) time 153 us, min 1073, max 1079, scanline start 1072, end 1082
[18793.024933] audit: type=1334 audit(1621441760.199:313): prog-id=103 op=LOAD
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[18823.124309] audit: type=1131 audit(1621441790.299:317): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-hostnamed comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
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[19615.817516] Slimulator[24574]: segfault at 7fb94cbbd011 ip 00007fb94cc50348 sp 00007fffefd935c8 error 4 in libswscale.so.5.9.100[7fb94cbe5000+75000]
[19615.817524] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[19615.817544] audit: type=1701 audit(1621442582.996:321): auid=1000 uid=1000 gid=1000 ses=1 pid=24574 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
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[20633.629288] Slimulator[25687]: segfault at 7fed842b8011 ip 00007fed8434b348 sp 00007ffcbf0f45d8 error 4 in libswscale.so.5.9.100[7fed842e0000+75000]
[20633.629298] Code: 45 85 c0 0f 8e 58 01 00 00 41 8d 40 ff 49 89 cc 48 89 d5 48 89 f9 48 89 44 24 f8 44 89 c0 31 f6 48 89 44 24 e0 0f 1f 44 00 00 <0f> b6 41 01 44 0f b6 41 02 48 83 c1 06 44 8b 7c 24 d4 8b 54 24 d8
[20633.629328] audit: type=1701 audit(1621443600.811:330): auid=1000 uid=1000 gid=1000 ses=1 pid=25687 comm="Slimulator" exe="/home/john/Projects/Slimulator/bin/Debug/net5.0/Slimulator" sig=11 res=1
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  • Developing MobyCAIRO

    26 mai 2021, par Multimedia Mike — General

    I recently published a tool called MobyCAIRO. The ‘CAIRO’ part stands for Computer-Assisted Image ROtation, while the ‘Moby’ prefix refers to its role in helping process artifact image scans to submit to the MobyGames database. The tool is meant to provide an accelerated workflow for rotating and cropping image scans. It works on both Windows and Linux. Hopefully, it can solve similar workflow problems for other people.

    As of this writing, MobyCAIRO has not been tested on Mac OS X yet– I expect some issues there that should be easily solvable if someone cares to test it.

    The rest of this post describes my motivations and how I arrived at the solution.

    Background
    I have scanned well in excess of 2100 images for MobyGames and other purposes in the past 16 years or so. The workflow looks like this :


    Workflow diagram

    Image workflow


    It should be noted that my original workflow featured me manually rotating the artifact on the scanner bed in order to ensure straightness, because I guess I thought that rotate functions in image editing programs constituted dark, unholy magic or something. So my workflow used to be even more arduous :


    Longer workflow diagram

    I can’t believe I had the patience to do this for hundreds of scans


    Sometime last year, I was sitting down to perform some more scanning and found myself dreading the oncoming tedium of straightening and cropping the images. This prompted a pivotal question :


    Why can’t a computer do this for me ?

    After all, I have always been a huge proponent of making computers handle the most tedious, repetitive, mind-numbing, and error-prone tasks. So I did some web searching to find if there were any solutions that dealt with this. I also consulted with some like-minded folks who have to cope with the same tedious workflow.

    I came up empty-handed. So I endeavored to develop my own solution.

    Problem Statement and Prior Work

    I want to develop a workflow that can automatically rotate an image so that it is straight, and also find the most likely crop rectangle, uniformly whitening the area outside of the crop area (in the case of circles).

    As mentioned, I checked to see if any other programs can handle this, starting with my usual workhorse, Photoshop Elements. But I can’t expect the trimmed down version to do everything. I tried to find out if its big brother could handle the task, but couldn’t find a definitive answer on that. Nor could I find any other tools that seem to take an interest in optimizing this particular workflow.

    When I brought this up to some peers, I received some suggestions, including an idea that the venerable GIMP had a feature like this, but I could not find any evidence. Further, I would get responses of “Program XYZ can do image rotation and cropping.” I had to tamp down on the snark to avoid saying “Wow ! An image editor that can perform rotation AND cropping ? What a game-changer !” Rotation and cropping features are table stakes for any halfway competent image editor for the last 25 or so years at least. I am hoping to find or create a program which can lend a bit of programmatic assistance to the task.

    Why can’t other programs handle this ? The answer seems fairly obvious : Image editing tools are general tools and I want a highly customized workflow. It’s not reasonable to expect a turnkey solution to do this.

    Brainstorming An Approach
    I started with the happiest of happy cases— A disc that needed archiving (a marketing/press assets CD-ROM from a video game company, contents described here) which appeared to have some pretty clear straight lines :


    Ubisoft 2004 Product Catalog CD-ROM

    My idea was to try to find straight lines in the image and then rotate the image so that the image is parallel to the horizontal based on the longest single straight line detected.

    I just needed to figure out how to find a straight line inside of an image. Fortunately, I quickly learned that this is very much a solved problem thanks to something called the Hough transform. As a bonus, I read that this is also the tool I would want to use for finding circles, when I got to that part. The nice thing about knowing the formal algorithm to use is being able to find efficient, optimized libraries which already implement it.

    Early Prototype
    A little searching for how to perform a Hough transform in Python led me first to scikit. I was able to rapidly produce a prototype that did some basic image processing. However, running the Hough transform directly on the image and rotating according to the longest line segment discovered turned out not to yield expected results.


    Sub-optimal rotation

    It also took a very long time to chew on the 3300×3300 raw image– certainly longer than I care to wait for an accelerated workflow concept. The key, however, is that you are apparently not supposed to run the Hough transform on a raw image– you need to compute the edges first, and then attempt to determine which edges are ‘straight’. The recommended algorithm for this step is the Canny edge detector. After applying this, I get the expected rotation :


    Perfect rotation

    The algorithm also completes in a few seconds. So this is a good early result and I was feeling pretty confident. But, again– happiest of happy cases. I should also mention at this point that I had originally envisioned a tool that I would simply run against a scanned image and it would automatically/magically make the image straight, followed by a perfect crop.

    Along came my MobyGames comrade Foxhack to disabuse me of the hope of ever developing a fully automated tool. Just try and find a usefully long straight line in this :


    Nascar 07 Xbox Scan, incorrectly rotated

    Darn it, Foxhack…

    There are straight edges, to be sure. But my initial brainstorm of rotating according to the longest straight edge looks infeasible. Further, it’s at this point that we start brainstorming that perhaps we could match on ratings badges such as the standard ESRB badges omnipresent on U.S. video games. This gets into feature detection and complicates things.

    This Needs To Be Interactive
    At this point in the effort, I came to terms with the fact that the solution will need to have some element of interactivity. I will also need to get out of my safe Linux haven and figure out how to develop this on a Windows desktop, something I am not experienced with.

    I initially dreamed up an impressive beast of a program written in C++ that leverages Windows desktop GUI frameworks, OpenGL for display and real-time rotation, GPU acceleration for image analysis and processing tricks, and some novel input concepts. I thought GPU acceleration would be crucial since I have a fairly good GPU on my main Windows desktop and I hear that these things are pretty good at image processing.

    I created a list of prototyping tasks on a Trello board and made a decent amount of headway on prototyping all the various pieces that I would need to tie together in order to make this a reality. But it was ultimately slowgoing when you can only grab an hour or 2 here and there to try to get anything done.

    Settling On A Solution
    Recently, I was determined to get a set of old shareware discs archived. I ripped the data a year ago but I was blocked on the scanning task because I knew that would also involve tedious straightening and cropping. So I finally got all the scans done, which was reasonably quick. But I was determined to not manually post-process them.

    This was fairly recent, but I can’t quite recall how I managed to come across the OpenCV library and its Python bindings. OpenCV is an amazing library that provides a significant toolbox for performing image processing tasks. Not only that, it provides “just enough” UI primitives to be able to quickly create a basic GUI for your program, including image display via multiple windows, buttons, and keyboard/mouse input. Furthermore, OpenCV seems to be plenty fast enough to do everything I need in real time, just with (accelerated where appropriate) CPU processing.

    So I went to work porting the ideas from the simple standalone Python/scikit tool. I thought of a refinement to the straight line detector– instead of just finding the longest straight edge, it creates a histogram of 360 rotation angles, and builds a list of lines corresponding to each angle. Then it sorts the angles by cumulative line length and allows the user to iterate through this list, which will hopefully provide the most likely straightened angle up front. Further, the tool allows making fine adjustments by 1/10 of an angle via the keyboard, not the mouse. It does all this while highlighting in red the straight line segments that are parallel to the horizontal axis, per the current candidate angle.


    MobyCAIRO - rotation interface

    The tool draws a light-colored grid over the frame to aid the user in visually verifying the straightness of the image. Further, the program has a mode that allows the user to see the algorithm’s detected edges :


    MobyCAIRO - show detected lines

    For the cropping phase, the program uses the Hough circle transform in a similar manner, finding the most likely circles (if the image to be processed is supposed to be a circle) and allowing the user to cycle among them while making precise adjustments via the keyboard, again, rather than the mouse.


    MobyCAIRO - assisted circle crop

    Running the Hough circle transform is a significantly more intensive operation than the line transform. When I ran it on a full 3300×3300 image, it ran for a long time. I didn’t let it run longer than a minute before forcibly ending the program. Is this approach unworkable ? Not quite– It turns out that the transform is just as effective when shrinking the image to 400×400, and completes in under 2 seconds on my Core i5 CPU.

    For rectangular cropping, I just settled on using OpenCV’s built-in region-of-interest (ROI) facility. I tried to intelligently find the best candidate rectangle and allow fine adjustments via the keyboard, but I wasn’t having much success, so I took a path of lesser resistance.

    Packaging and Residual Weirdness
    I realized that this tool would be more useful to a broader Windows-using base of digital preservationists if they didn’t have to install Python, establish a virtual environment, and install the prerequisite dependencies. Thus, I made the effort to figure out how to wrap the entire thing up into a monolithic Windows EXE binary. It is available from the project’s Github release page (another thing I figured out for the sake of this project !).

    The binary is pretty heavy, weighing in at a bit over 50 megabytes. You might advise using compression– it IS compressed ! Before I figured out the --onefile command for pyinstaller.exe, the generated dist/ subdirectory was 150 MB. Among other things, there’s a 30 MB FORTRAN BLAS library packaged in !

    Conclusion and Future Directions
    Once I got it all working with a simple tkinter UI up front in order to select between circle and rectangle crop modes, I unleashed the tool on 60 or so scans in bulk, using the Windows forfiles command (another learning experience). I didn’t put a clock on the effort, but it felt faster. Of course, I was livid with proudness the whole time because I was using my own tool. I just wish I had thought of it sooner. But, really, with 2100+ scans under my belt, I’m just getting started– I literally have thousands more artifacts to scan for preservation.

    The tool isn’t perfect, of course. Just tonight, I threw another scan at MobyCAIRO. Just go ahead and try to find straight lines in this specimen :


    Reading Who? Reading You! CD-ROM

    I eventually had to use the text left and right of center to line up against the grid with the manual keyboard adjustments. Still, I’m impressed by how these computer vision algorithms can see patterns I can’t, highlighting lines I never would have guessed at.

    I’m eager to play with OpenCV some more, particularly the video processing functions, perhaps even some GPU-accelerated versions.

    The post Developing MobyCAIRO first appeared on Breaking Eggs And Making Omelettes.

  • How to decode h.264 stream with added KLV VANC ancillary packets for openCV ?

    12 juillet 2021, par Isaac

    Long story short :

    


    H264 SDI video stream with embedded timestamp ( KLV VANC ancillary packet - type 02 KLV
metadata packet in VANC space)

    


    Need to decode and process frames in 'real-time'.

    


    I am using openCV for image processing BUT this discards critical ancillary data (embedded timestamps).

    


    How could I decode the h264 stream with embedded timestamps AND process same frames using openCV ?

    


    Novice in this field, determined to learn more.

    


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