avcodec_decode_video2 crashes while using in iOS by linking libavcodec.a

[sam18]

Hello,

I have been testing libavcodec in ios for h264 video decoding. In some cases, my application crashes while calling to avcodec_decode_video2. It shows EXE_BAD_ACCESS in ff_h264_decode_nal. please help me on this. let me know if you need any other informations.

thanks.

[Carl Eugen Hoyos]

To make this a valid ticket, please provide backtrace etc. as explained on ​http://ffmpeg.org/bugreports.html

[Carl Eugen Hoyos]

This sounds like an important issue but without additional information, I don't know how this could be resolved.

[glip]

I have the same on Mac 32/64 bit, using latest from git. It's hard to reproduce. Crash happens in h264.c, line 261 (first if in for)
#if HAVE_FAST_64BIT

for (i = 0; i + 1 < length; i += 9) {

if (!((~AV_RN64A(src + i) & <-- crash

(AV_RN64A(src + i) - 0x0100010001000101ULL)) &

0x8000800080008080ULL))

continue;

FIND_FIRST_ZERO;
STARTCODE_TEST;
i -= 7;

}

#else

[glip]

How I can help to fix it?

[Carl Eugen Hoyos]

If you see a crash on osx, please open a new ticket, do not forget to add all information as requested on ​http://ffmpeg.org/bugreports.html