When I run ff with any input file with 2 output files, where both of
them contain video stream, I have crash with SEGV.
gdb log:
#0 0xb7e95abf in memcpy () from /lib/tls/libc.so.6
(gdb) bt
#0 0xb7e95abf in memcpy () from /lib/tls/libc.so.6
#1 0x0805fb5b in av_dup_packet (pkt=0x8425560) at utils.c:257
#2 0x08064fa9 in av_interleave_packet_per_dts (s=0x8421070,
out=0xbf8ad870, pkt=0xbf8ad9b0, flush=0) at utils.c:2422
#3 0x080651e5 in av_interleave_packet (s=0x8421070, out=0xbf8ad870,
in=0xbf8ad9b0, flush=0) at utils.c:2473
#4 0x0806527e in av_interleaved_write_frame (s=0x8421070,
pkt=0xbf8ad9b0) at utils.c:2506
#5 0x08055655 in write_frame (s=0x8421070, pkt=0xbf8ad9b0,
avctx=0x8421fe0, bsfc=0x0) at ffmpeg.c:467
#6 0x080583fe in output_packet (ist=0x84c59c0, ist_index=0,
ost_table=0x842be70, nb_ostreams=3, pkt=0xbf8adce0)
at ffmpeg.c:1347
#7 0x0805a49c in av_encode (output_files=0x8395580,
nb_output_files=2, input_files=0x8395480, nb_input_files=1,
stream_maps=0x83955e0, nb_stream_maps=0) at ffmpeg.c:2010
#8 0x0805ef44 in main (argc=15, argv=0xbf8ae204) at ffmpeg.c:4271
(gdb) frame 1
#1 0x0805fb5b in av_dup_packet (pkt=0x8425560) at utils.c:257
257 memcpy(data, pkt->data, pkt->size);
(gdb) list
252 return AVERROR_NOMEM;
253 data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
254 if (!data) {
255 return AVERROR_NOMEM;
256 }
257 memcpy(data, pkt->data, pkt->size);
258 memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
259 pkt->data = data;
260 pkt->destruct = av_destruct_packet;
261 }
(gdb) print data
$1 = (uint8_t *) 0xb7da9020 ""
(gdb) print pkt->data
$2 = (uint8_t *) 0x0
(gdb) print pkt->size
$3 = 145800
ff's arguments in this case was: ./ffmpeg -y -i 1.avi -sameq -vcodec
copy -acodec copy -f mpeg2video 1 -f m4v 2
I tryed to run ff several times with different output args, result was
the same. Input files contained streams in mpeg2, mpeg4, h264 formats.
ff crashed in the same place in code.