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Mon Jan 8 17:05:10 CET 2007 · https://ffmpeg.org/pipermail/ffmpeg-devel/2007-January/027171.html

Hi

On Mon, Jan 08, 2007 at 05:04:32PM +0200, Nikns Siankin wrote:
> On Fri, Jan 05, 2007 at 03:55:27PM +0100, Michael Niedermayer wrote:
> >Hi
> >
> >On Wed, Jan 03, 2007 at 11:31:46AM +0200, Nikns Siankin wrote:
> >> ffplay seems broken in svn 20070102.
> >> 
> >> # ffplay -h 
> >> ffplay version SVN-r7400, Copyright (c) 2003-2006 Fabrice Bellard, et al.
> >> 
> >> # uname -a
> >> OpenBSD obsd.my.domain 4.0 GENERIC#690 amd64
> >> 
> >> (gdb) bt
> >> #0  0x0000000042fc29a2 in av_find_stream_info (ic=Cannot access memory at 
> >> address 0x43cde708
> >> ) at utils.c:1780
> >> #1  0x0000000000405f17 in decode_thread (arg=0x4d882000) at ffplay.c:1868
> >> #2  0x000000004a2f2ad7 in SDL_RunThread () from /usr/local/lib/libSDL.so.6.0
> >> #3  0x000000004a2f2c89 in RunThread () from /usr/local/lib/libSDL.so.6.0
> >> #4  0x0000000049a8a28d in _thread_start () at 
> >> /usr/src/lib/libpthread/uthread/uthread_create.c:244
> >> #5  0x000000000000001f in ?? ()
> >> #6  0x0000000000000000 in ?? ()
> >> (gdb) disass $pc-32 $pc+32
> >> Dump of assembler code from 0x42fc2982 to 0x42fc29c2:
> >> 0x0000000042fc2982 <av_find_stream_info+2>:     mov    $0xa,%ecx
> >> 0x0000000042fc2987 <av_find_stream_info+7>:     push   %r14
> >> 0x0000000042fc2989 <av_find_stream_info+9>:     push   %r13
> >> 0x0000000042fc298b <av_find_stream_info+11>:    push   %r12
> >> 0x0000000042fc298d <av_find_stream_info+13>:    xor    %r12d,%r12d
> >> 0x0000000042fc2990 <av_find_stream_info+16>:    push   %rbp
> >> 0x0000000042fc2991 <av_find_stream_info+17>:    xor    %ebp,%ebp
> >> 0x0000000042fc2993 <av_find_stream_info+19>:    push   %rbx
> >> 0x0000000042fc2994 <av_find_stream_info+20>:    sub    $0x1c7e8,%rsp
> >> 0x0000000042fc299b <av_find_stream_info+27>:    mov    3596062(%rip),%rax        
> >> # 0x433308c0 <gxf_muxer+1089344>
> >> 0x0000000042fc29a2 <av_find_stream_info+34>:    mov    %rdi,0x68(%rsp)
> >> 0x0000000042fc29a7 <av_find_stream_info+39>:    lea    0x80(%rsp),%r14
> >> 0x0000000042fc29af <av_find_stream_info+47>:    cld    
> >> 0x0000000042fc29b0 <av_find_stream_info+48>:    mov    (%rax),%rax
> >> 0x0000000042fc29b3 <av_find_stream_info+51>:    mov    %rax,0x1c7d0(%rsp)
> >> 0x0000000042fc29bb <av_find_stream_info+59>:    lea    0x1c5a0(%rsp),%rax
> >
> >try to av_mallocz() duration_error and if it fixes the issue submit a patch
> 
> It fixed.
> Here is patch:
> 
> 
> --- libavformat/utils.c.orig	Tue Jan  2 22:35:46 2007
> +++ libavformat/utils.c	Mon Jan  8 16:55:12 2007
> @@ -1778,14 +1778,19 @@ static int get_std_framerate(int i){
>   */
>  int av_find_stream_info(AVFormatContext *ic)
>  {
> -    int i, count, ret, read_size, j;
> +    int i, count, ret, read_size, j, k;
>      AVStream *st;
>      AVPacket pkt1, *pkt;
>      AVPacketList *pktl=NULL, **ppktl;
>      int64_t last_dts[MAX_STREAMS];
>      int duration_count[MAX_STREAMS]={0};
> -    double duration_error[MAX_STREAMS][MAX_STD_TIMEBASES]={{0}}; //FIXME malloc()?
> +    double **duration_error;
>  
> +    duration_error = (double **) av_mallocz(MAX_STREAMS* sizeof(double *));
> +
> +    for (k=0;k<MAX_STREAMS;k++)
> +        duration_error[k] = (double *) av_mallocz(MAX_STD_TIMEBASES* sizeof(double));

duration_error= av_mallocz(MAX_STREAMS * MAX_STD_TIMEBASES * sizeof(double));

much simpler ...

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I have often repented speaking, but never of holding my tongue.
-- Xenocrates
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[Ffmpeg-devel] ffplay broken in latest svn