[FFmpeg-trac] #1791(avfilter:new): changing number of channels/sample rate midstream
FFmpeg
trac at avcodec.org
Sun Oct 7 20:24:55 CEST 2012
#1791: changing number of channels/sample rate midstream
--------------------------------------+----------------------------------
Reporter: richardpl | Owner:
Type: defect | Status: new
Priority: normal | Component: avfilter
Version: git-master | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
--------------------------------------+----------------------------------
Midstream changing number of channels or sample rate causes SEGV.
Should be reproducible with any container/codec that support midstream
change of such parameters.
{{{
> ./ffmpeg_g -err_detect 0 -i /tmp/crash2.tak -f null -
ffmpeg version git-2012-10-07-9fc53f2 Copyright (c) 2000-2012 the FFmpeg
developers
built on Oct 7 2012 18:00:27 with FreeBSD clang version 3.1
(branches/release_31 156863) 20120523
configuration: --disable-everything --cc=clang --enable-
decoder='dca,tak,ape,flac,pcm_s16le,pcm_s16be,pcm_s8,pcm_u8,pcm_s24le,pcm_s24be,pcm_s32le,pcm_s32be,pcm_f32le,pcm_f32be,pcm_f64le,pcm_f64be'
--enable-enco
der='flac,pcm_s16le,pcm_s16be,pcm_s8,pcm_u8,pcm_s24le,pcm_s24be,pcm_s32le,pcm_s32be,pcm_f64le,pcm_f64be'
--enable-protocol='file,pipe' --enable-
demuxer='dts,dtshd,tak,wav,flac,ape' --enable-
muxer='wav,flac,null,framemd5,md5,crc,framecrc' --enable-
filter='aresample,anull,abuffer,aconvert,afifo,aformat,ashowinfo,anullsink,abuffersink,asetnsamples'
--enable-bzlib --enable-zlib
libavutil 51. 73.102 / 51. 73.102
libavcodec 54. 65.100 / 54. 65.100
libavformat 54. 30.100 / 54. 30.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 19.102 / 3. 19.102
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
[tak @ 0x28819100] max_analyze_duration 5000000 reached at 5000000
Guessed Channel Layout for Input Stream #0.0 : 4.0
Input #0, tak, from '/tmp/crash2.tak':
Duration: 00:01:00.48, start: 0.000000, bitrate: 861 kb/s
Stream #0:0: Audio: tak, 44100 Hz, 4.0, s16p
Output #0, null, to 'pipe:':
Metadata:
encoder : Lavf54.30.100
Stream #0:0: Audio: pcm_s16le, 44100 Hz, 4.0, s16, 2822 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (tak -> pcm_s16le)
Press [q] to stop, [?] for help
Error while decoding stream #0:0: Invalid data found when processing input
Last message repeated 36 times
Input stream #0:0 frame changed from rate:44100 fmt:s16p ch:4 chl:4.0 to
rate:44100 fmt:s16p ch:2 chl:2 channels (FL+FR+FC+BC)
Segmentation fault (core dumped)
> gdb ffmpeg_g ffmpeg_g.core
GNU gdb 6.1.1 [FreeBSD]
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details.
This GDB was configured as "i386-marcel-freebsd"...
Core was generated by `ffmpeg_g'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libm.so.5...done.
Loaded symbols for /lib/libm.so.5
Reading symbols from /lib/libz.so.6...done.
Loaded symbols for /lib/libz.so.6
Reading symbols from /lib/libthr.so.3...done.
Loaded symbols for /lib/libthr.so.3
Reading symbols from /lib/libc.so.7...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0 0x28370dae in memcpy () from /lib/libc.so.7
[New Thread 28803080 (LWP 100173/ffmpeg_g)]
(gdb) bt
#0 0x28370dae in memcpy () from /lib/libc.so.7
#1 0x081a1064 in av_samples_copy (dst=dwarf expression stack underflow
) at libavutil/samplefmt.c:217
#2 0x0806520a in ff_copy_buffer_ref (outlink=DWARF-2 expression error:
DW_OP_reg operations must be used either alone or in conjuction with
DW_OP_piece.
) at libavfilter/buffer.c:226
#3 0x08065802 in av_buffersrc_add_ref (s=dwarf2_read_address: Corrupted
DWARF expression.
) at libavfilter/buffersrc.c:133
#4 0x080656ac in av_buffersrc_add_frame (buffer_src=dwarf2_read_address:
Corrupted DWARF expression.
) at libavfilter/buffersrc.c:91
#5 0x0805b26f in output_packet (ist=Unhandled dwarf expression opcode
0xed
) at ffmpeg.c:1544
#6 0x08057252 in transcode () at ffmpeg.c:2839
#7 0x0805337c in main (argc=dwarf2_read_address: Corrupted DWARF
expression.
) at ffmpeg.c:3171
(gdb)
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1791>
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