[FFmpeg-user] ffserver audio livestream "Could not open output feed file '/tmp/inputAudio.ffm'"

[Matt Flax]

Any follow ups on this ?

On 09/04/16 10:34, Matt Flax wrote:
> here you go ...
>
> .... snip ... removed info about libraries ....
> open("/dev/urandom", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> read(3, "\347{.k", 4)                   = 4
> close(3)                                = 0
> rt_sigprocmask(SIG_UNBLOCK, [RT_1 RT_2], NULL, 16) = 0
> rt_sigaction(SIGCHLD, {0x40d651, [RT_68 RT_71 RT_72 RT_73 RT_75 RT_76 
> RT_79 RT_81 RT_82 RT_83 RT_84 RT_85 RT_88 RT_89 RT_90 RT_91 RT_93 
> RT_94 RT_95], SA_RESTORER|SA_RESTART|SA_NOCLDSTOP, 0}, NULL, 16) = 0
> open("/etc/ffserver.conf", O_RDONLY|O_LARGEFILE) = 3
> readv(3, [{"", 0}, {"HTTPPort 8090\nHTTPBindAddress 0."..., 1024}], 2) 
> = 670
> readv(3, [{"", 0}, {"HTTPPort 8090\nHTTPBindAddress 0."..., 1024}], 2) 
> = 0
> close(3)                                = 0
> clock_gettime(CLOCK_REALTIME, {1458907722, 51781050}) = 0
> open("/etc/TZ", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_CLOEXEC) = 3
> fstat64(3, {st_mode=S_IFREG|0644, st_size=4, ...}) = 0
> mmap2(NULL, 4, PROT_READ, MAP_SHARED, 3, 0) = 0x77a84000
> close(3)                                = 0
> ioctl(1, TIOCGWINSZ, 0x7fb08798)        = 0
> writev(1, [{"Fri Mar 25 12:08:42 2016 Could n"..., 77}, {"'\n", 2}], 
> 2) = 79
> clock_gettime(CLOCK_REALTIME, {1458907722, 53880165}) = 0
> munmap(0x77a84000, 4)                   = 0
> open("/etc/TZ", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_CLOEXEC) = 3
> fstat64(3, {st_mode=S_IFREG|0644, st_size=4, ...}) = 0
> mmap2(NULL, 4, PROT_READ, MAP_SHARED, 3, 0) = 0x77a84000
> close(3)                                = 0
> writev(1, [{"Fri Mar 25 12:08:42 2016 ", 25}, {"Could not setup feed 
> streams\n", 29}], 2) = 54
> exit_group(1)                           = ?
>
> I am open to altering ffserver.c for more information ...
>
> thanks
> Matt
>
>
> On 09/04/16 09:25, Moritz Barsnick wrote:
>> On Sat, Apr 09, 2016 at 08:56:17 +1000, Matt Flax wrote:
>>> Actually it starts with no file present.
>> Hmm. Do you have strace?
>>
>> You can run
>> $ strace -o /tmp/ffserver.log ffserver -f /etc/ffserver.conf
>> and then inspect /tmp/ffserver.log for /tmp/inputAudio.ffm. On
>> ffserver's second access (r/w), I get this:
>>
>> access("/tmp/inputAudio.ffm", F_OK)     = 0
>> access("/tmp/inputAudio.ffm", W_OK)     = -1 EACCES (Permission denied)
>> open("/tmp/inputAudio.ffm", 
>> O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE|O_CLOEXEC, 0666) = -1 EACCES 
>> (Permission denied)
>>
>> with "Permission denied" being the interesting information ffserver
>> should be giving.
>>
>> Alternatively, if you are building ffserver yourself, you could modify
>> it to provide that information. I can add a patch if desired.
>>
>> Moritz
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>> ffmpeg-user at ffmpeg.org
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>
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