ffplay access violation on win64

[ronag]

win64 static build (​http://ffmpeg.zeranoe.com/builds/, 2012-04-16) ffplay crashes on win64 with some files, I added two samples in (​ftp://upload.ffmpeg.org/incoming/intermittent_win64_ffplay_crash).
I do not have this problem with win32 static build ffplay.

[Carl Eugen Hoyos]

Both samples show no problems with valgrind here.

Is the crash also reproducible with ffmpeg -i input -f null - ?

Please add gdb output as explained on ​http://ffmpeg.org/bugreports.html (gdb works fine on Windows64), please understand that it is unlikely a crash without backtrace gets fixed.

[ronag]

Crash with ffmpeg -i input -f null as well.

I'll try to get debug win64 binaries to run it with. With the regular binaries gdb complains that ffmpeg.exe is "not in executable format".

[ronag]

Works fine with 32 bit ffmpeg/ffplay, and both 32 bit and 64 bit avconv/avplay.

[ronag]

I've tried to reproduce it in VS2010 using the ffmpeg libraries where I can get the w64 build to crash with the following. Not sure if it is the same with the ffmpeg/ffplay executables.

while(true)
{
    AVFormatContext* ic = nullptr;
    avformat_open_input(&ic, "M:\\t.mp4", nullptr, nullptr);
    avformat_find_stream_info(ic, nullptr); <-- Access violation reading location 0xffffffffffffffff.
    avformat_close_input(&ic);
    Sleep(1000);
}

Which crashes. It is interesting that it crashes on vmovaps, since I just recently upgraded to a Sandy Bridge cpu with AVX instructions.

---

avcodec-54.dll!000000006a5b7ef0() <-- Access violation reading location 0xffffffffffffffff.	 
[Frames below may be incorrect and/or missing, no symbols loaded for avcodec-54.dll]	
avcodec-54.dll!000000006a5b8035() 	
avcodec-54.dll!000000006a5b8e95() 	
avcodec-54.dll!000000006a5b8ed5() 	
avcodec-54.dll!000000006a5b8f15() 	
avcodec-54.dll!000000006a5b8f55() 	
avcodec-54.dll!000000006a5badf6() 	
avcodec-54.dll!000000006b381fa0()

---

000000006A5B7EF0  vmovaps     ymm2,ymmword ptr [rcx+40h]  <-- Access violation reading location 0xffffffffffffffff.
000000006A5B7EF5  vmovaps     ymm3,ymmword ptr [rcx+60h]  
000000006A5B7EFA  vsubps      ymm7,ymm2,ymm3  
000000006A5B7EFE  vaddps      ymm2,ymm2,ymm3  
000000006A5B7F02  vxorps      ymm7,ymm7,ymmword ptr [6ADEA300h]  
000000006A5B7F0A  vshufps     ymm3,ymm2,ymm7,0BEh  
000000006A5B7F0F  vshufps     ymm2,ymm2,ymm7,44h  
000000006A5B7F14  vsubps      ymm7,ymm2,ymm3  
000000006A5B7F18  vaddps      ymm2,ymm2,ymm3  
000000006A5B7F1C  vshufps     ymm3,ymm2,ymm7,0DDh  
000000006A5B7F21  vshufps     ymm2,ymm2,ymm7,88h 

[Carl Eugen Hoyos]

Did you use a gdb version that is able to debug win64 binaries?

Please recompile FFmpeg with debug symbols enabled.

[ronag]

I use gdb which is included in the mingw installation found here, ​http://sourceforge.net/projects/mingw-w64/.

I cannot compile ffmpeg, a virtual linux dist does not fit on my ssd drive. I'm trying to get debug binaries through other means.

[Carl Eugen Hoyos]

Replying to ronag:

I use gdb which is included in the mingw installation found here, ​http://sourceforge.net/projects/mingw-w64/.

I cannot compile ffmpeg

FFmpeg compilation should work out-of-the-box with mingw, do you see any problems?

[ronag]

FFmpeg compilation should work out-of-the-box with mingw, do you see any problems?

The problem is that I'm on Windows, and don't know how to compile ffmpeg.

[ronag]

I don't get the problem on an older computer.

[Carl Eugen Hoyos]

I tested zeranoe fce30d8 64-bit Static and both ffmpeg and ffplay work fine for the given samples, I cannot test on AVX though.

[Michael Niedermayer]

tested on mingw64 + wine with AVX, no crash (only ffmpeg tested, no SDL for mingw installed)

[Carl Eugen Hoyos]

I tested on Windows 7 with AVX hardware and current Zeranoe static build: No crash