jvm crash at libjniavformat

[zouxiaodong]

javacv version: 1.5.6

java snippet code as follow:

  FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("udp://239.0.1.3:3300");
  grabber.setOption("analyzeduration", "5000000");
  grabber.setOption("probesize", "20000000");
  grabber.setOption("fifo_size", "50000000");
  grabber.setOption("timeout", "1000000");
  try{
    grabber.startUnsafe();
    AVFormatContext fc = grabber.getFormatContext();
    AVRational AV_TIME_BASE_Q = new AVRational().num(1).den(avutil.AV_TIME_BASE);
    log.debug("ts_id:{}", fc.ts_id());
    videoFeature.setTsId(fc.ts_id());
    //only parse first program
    AVProgram program = fc.programs(0);
    VideoFeature.Program videoProgram = new VideoFeature.Program();
    videoFeature.setProgram(videoProgram);
    videoProgram.setProgramId(program.id());
    videoProgram.setProgramNum(program.program_num());
    videoProgram.setStreams(program.nb_stream_indexes());
    videoProgram.setPmtPid(program.pmt_pid());
    videoProgram.setPcrPid(program.pcr_pid());
    videoProgram.setStartPts(program.start_time());
    videoProgram.setStartTime(printTime(program.start_time(), AV_TIME_BASE_Q, 0));
    .....
    some code get streams info
    ....
  }catch (Exception e)
  {
  }finally{
    grabber.releaseUnsafe();
  }
--------------
A fatal error has been detected by the Java Runtime Environment:

 SIGSEGV (0xb) at pc=0x00007efe8d797ef0, pid=17572, tid=0x00007efef55d0700

JRE version: Java(TM) SE Runtime Environment (8.0_281-b09) (build 1.8.0_281-b09)
Java VM: Java HotSpot(TM) 64-Bit Server VM (25.281-b09 mixed mode linux-amd64 compressed oops)
Problematic frame:
C  [libjniavformat.so+0x44ef0]  Java_org_bytedeco_ffmpeg_avformat_AVFormatContext_programs__I+0x50

Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

If you would like to submit a bug report, please visit:
  http://bugreport.java.com/bugreport/crash.jsp
The crash happened outside the Java Virtual Machine in native code.
See problematic frame for where to report the bug.

java.lang.Integer
 - klass: 'java/lang/Integer'
R9 =0x00000000eb2cb120 is an oop
org.bytedeco.ffmpeg.avformat.AVFormatContext
 - klass: 'org/bytedeco/ffmpeg/avformat/AVFormatContext'
R10=0x00000000000056ee is an unknown value
R11=0x00007eff5b5cd31c: <offset 0xfda31c> in /usr/local/jdk1.8.0_281/jre/lib/amd64/server/libjvm.so at 0x00007eff5a5f3000
R12=0x00007efe90730d00 is an unknown value
R13=0x00007efef55cf7f0 is pointing into the stack for thread: 0x00007efeac004800
R14=0x00007efef55cf490 is pointing into the stack for thread: 0x00007efeac004800
R15=0x00007efeac004800 is a thread


Stack: [0x00007efef54d0000,0x00007efef55d1000],  sp=0x00007efef55cf7c0,  free space=1021k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libjniavformat.so+0x44ef0]  Java_org_bytedeco_ffmpeg_avformat_AVFormatContext_programs__I+0x50

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J 6262  org.bytedeco.ffmpeg.avformat.AVFormatContext.programs(I)Lorg/bytedeco/ffmpeg/avformat/AVProgram; (0 bytes) @ 0x00007eff463b1238 [0x00007eff463b1200+0x38]
J 6253 C2 com.xx.TsExtractService.extraceFeature(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Integer;)V (2349 bytes) @ 0x00007eff463b6fd8 [0x00007eff463b4480+0x2b58]

[zouxiaodong]

i reproduced the issue, jvm will crashed at AVProgram program = fc.programs(0) if ffmpeg Could not find codec parameters for stream .
so how to check that situation in javacv ? ts_id ==0 or fc.programs() == null || fc.programs().isNull()?

-----gdb coredump
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007fae6491a859 in __GI_abort () at abort.c:79
#2 0x00007fae64212e99 in os::abort(bool) () from /usr/local/jdk1.8.0_281/jre/lib/amd64/server/libjvm.so
#3 0x00007fae643db4c3 in VMError::report_and_die() () from /usr/local/jdk1.8.0_281/jre/lib/amd64/server/libjvm.so
#4 0x00007fae6421d165 in JVM_handle_linux_signal () from /usr/local/jdk1.8.0_281/jre/lib/amd64/server/libjvm.so
#5 0x00007fae6420ffe8 in signalHandler(int, siginfo*, void*) () from /usr/local/jdk1.8.0_281/jre/lib/amd64/server/libjvm.so
#6
#7 0x00007fad959b3ef0 in Java_org_bytedeco_ffmpeg_avformat_AVFormatContext_programs__I ()
from /home/xzitv/.javacpp/cache/ffmpeg-4.4-1.5.6-linux-x86_64.jar/org/bytedeco/ffmpeg/linux-x86_64/libjniavformat.so
#8 0x00007fae4db86970 in ?? ()
#9 0x00000000eb8c47d0 in ?? ()
#10 0x00000000eb93f848 in ?? ()
#11 0x00000000eb8c4330 in ?? ()
#12 0x0000002d0000000b in ?? ()
#13 0x00000000c074f370 in ?? ()
#14 0x00000000eb8c4e78 in ?? ()
#15 0x0000000000000001 in ?? ()
#16 0x00007fae64006d8d in JVM_Sleep () from /usr/local/jdk1.8.0_281/jre/lib/amd64/server/libjvm.so
#17 0x00007fae4e6c1cfc in ?? ()
#18 0x00000000eb8c44b8 in ?? ()
#19 0x00000000eb8c4720 in ?? ()
#20 0x00000000eb8c47d0 in ?? ()
#21 0x00000000c0711a98 in ?? ()

---java log
[mpegts @ 0x7fadbc0c3640] Could not find codec parameters for stream 1 (Unknown: none): unknown codec
Consider increasing the value for the 'analyzeduration' (5000000) and 'probesize' (20000000) options
Input #0, mpegts, from 'udp://239.93.0.184:5140':
Duration: N/A, start: 28087.985978, bitrate: 192 kb/s
Stream #0:0[0x1100]: Audio: mp2, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:1[0x1011]: Unknown: none
2021-10-20 21:51:03 DEBUG feature-cctv1hd c.z.i.p.a.c.s.FeatureExtractService ts_id:0
A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x00007fad959b3ef0, pid=2838329, tid=0x00007fae00f3f700

JRE version: Java(TM) SE Runtime Environment (8.0_281-b09) (build 1.8.0_281-b09)

[zouxiaodong]

fc.programs() is null if some exception occured,