Nigel,
Can you please follow up on my question from march? Otherwise, I'd
like to close the issue.
Cheers,
Reinhard
2012/3/5 Reinhard Tartler <siret...@gmail.com>:
> On Fri, Feb 17, 2012 at 9:48 PM, Nigel Horne <n...@bandsman.co.uk> wrote:
>> Package: vlc
>> Version: 1.1.13-1+b1
>> Severity: normal
>>
>> Dear Maintainer,
>> *** Please consider answering these questions, where appropriate ***
>>
>> * What led up to the situation?
>> Attempted to conver to MP3
>> * What exactly did you do (or not do) that was effective (or
>> ineffective)?
>> Media->Convert/Save->Add File->Convert/Save->Fill in destination
>> file->select MP3 from pull down list->Press Start
>> * What was the outcome of this action?
>> vlc:
>> /build/buildd-libav-extra_0.8.0.1+b1-amd64-PoqmIt/libav-extra-0.8.0.1+b1/libav/libavutil/mathematics.c:79:
>> av_rescale_rnd: Assertion `c > 0' failed.
>> Aborted (core dumped)
>>
>> * What outcome did you expect instead?
>> Audio extracted into MP3 file
>
> That function (av_rescale_rnd) has not been touched since 2005, so the
> problem is most probably in its caller. The function itself starts
> like this (docstring copied from header):
>
> /**
> * Rescale a 64-bit integer with specified rounding.
> * A simple a*b/c isn't possible as it can overflow.
> */
> int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){
> int64_t r=0;
> assert(c > 0);
> assert(b >=0);
> assert((unsigned)rnd<=5 && rnd!=4);
>
>
> Remi, unless I have a backtrace that shows that this is a problem
> within some libav library, there is little we can do about it. TBH, I
> rahter suspect the bug to be in the calling application.
>
> Looking in launchpad, I see this (possibly the same) crash:
> https://bugs.launchpad.net/vlc/+bug/927050
>
> Unfortunately, the backtrace does not show the offending caller:
>
> #0 0xb7798424 in __kernel_vsyscall ()
> No symbol table info available.
> #1 0xb74f2c8f in __GI_raise (sig=6) at
> ../nptl/sysdeps/unix/sysv/linux/raise.c:64
> resultvar = <optimized out>
> resultvar = <optimized out>
> pid = -1218183180
> selftid = 18107
> #2 0xb74f62b5 in __GI_abort () at abort.c:92
> save_stage = 2
> act = {__sigaction_handler = {sa_handler = 0xd, sa_sigaction =
> 0xd}, sa_mask = {__val = {3076784116, 3076789248, 128, 3076784116,
> 3076789248, 128, 127, 3075716637, 3076784116, 127, 3076784116, 127,
> 3075651409, 178484352, 178484352, 127, 178483592, 0, 178484352,
> 4222451712, 178484352, 178484453, 178484352, 178484352, 178484479,
> 178484652, 178484352, 178484652, 0, 0, 0, 0}}, sa_flags = 0,
> sa_restorer = 0}
> sigs = {__val = {32, 0 <repeats 31 times>}}
> #3 0xb74eb826 in __GI___assert_fail (assertion=0xb01031e4 "c > 0",
> file=0xb01031a4
> "/build/buildd/libav-extra-0.8.0.1/libav/libavutil/mathematics.c",
> line=79, function=0xb0103520 "av_rescale_rnd") at assert.c:81
> buf = 0xaa375b0 "vlc:
> /build/buildd/libav-extra-0.8.0.1/libav/libavutil/mathematics.c:79:
> av_rescale_rnd: Zusicherung \302\273c > 0\302\253 nicht
> erf\303\274llt.\n"
> #4 0xb00f73b5 in ?? ()
> No symbol table info available.
>
>
> Nigel, can you reproduce the crash and can ideally try to retrieve a
> proper stacktrace?
>
> --
> regards,
> Reinhard
--
regards,
Reinhard
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