[Ffmpeg-devel] possible memory leak?

[Zoltan NAGY]

M?ns Rullg?rd wrote:
> Zoltan NAGY <nagyz at nefty.hu> writes:
>
>   
>> ==24793== 84,329 (83,208 direct, 1,121 indirect) bytes in 72 blocks
>> are definitely lost in loss record 9 of 9
>> ==24793==    at 0x401CA6B: memalign (vg_replace_malloc.c:332)
>> ==24793==    by 0x40E374E: av_malloc (in /usr/local/lib/libavcodec-CVS.so)
>> ==24793==    by 0x403F3D5: av_new_packet (in
>> /usr/local/lib/libavformat-CVS.so)
>> ==24793==    by 0x408EE37: rtp_parse_packet (in
>> /usr/local/lib/libavformat-CVS.so)
>> ==24793==    by 0x408CF49: (within /usr/local/lib/libavformat-CVS.so)
>> ==24793==    by 0x404034A: (within /usr/local/lib/libavformat-CVS.so)
>> ==24793==    by 0x804893D: main (avcodec_sample.0.4.9.cpp:44)
>>
>> so basically it sais I didnt free the result of av_read_frame(). but I did!
>> (line 44 is while(av_read_frame(..)))
>>     
>
> Could you run this with debug symbols for libavformat?  It's a little
> difficult to see what's going on without line numbers.
>
>   
of course.

==11283== 36,082 bytes in 31 blocks are definitely lost in loss record 6 
of 7
==11283==    at 0x401CA6B: memalign (vg_replace_malloc.c:332)
==11283==    by 0x40EADCE: av_malloc (mem.c:62)
==11283==    by 0x403FD95: av_new_packet (utils.c:197)
==11283==    by 0x4090E97: rtp_parse_packet (rtp.c:457)
==11283==    by 0x408EFA9: rtsp_read_packet (rtsp.c:1138)
==11283==    by 0x4040D0A: av_read_frame_internal (utils.c:630)
==11283==    by 0x403DB66: av_find_stream_info (utils.c:1913)
==11283==    by 0x8048855: main (avcodec_sample.0.4.9.cpp:20)
==11283==
==11283==
==11283== 83,637 bytes in 73 blocks are definitely lost in loss record 7 
of 7
==11283==    at 0x401CA6B: memalign (vg_replace_malloc.c:332)
==11283==    by 0x40EADCE: av_malloc (mem.c:62)
==11283==    by 0x403FD95: av_new_packet (utils.c:197)
==11283==    by 0x4090E97: rtp_parse_packet (rtp.c:457)
==11283==    by 0x408EFA9: rtsp_read_packet (rtsp.c:1138)
==11283==    by 0x4040D0A: av_read_frame_internal (utils.c:630)
==11283==    by 0x804894D: main (avcodec_sample.0.4.9.cpp:44)
==11283==
==11283== LEAK SUMMARY:
==11283==    definitely lost: 129,950 bytes in 211 blocks.
==11283==      possibly lost: 0 bytes in 0 blocks.
==11283==    still reachable: 18 bytes in 1 blocks.
==11283==         suppressed: 0 bytes in 0 blocks.

if this helps..

I do not understand how could possibly there be a memleak,
it feels like I didnt free something up..

Regards,

Zoltan NAGY,
Software engineer