Hi all.
I am writing an application, receiving the MPEG2 Transport Stream from a DVB-S
card and saving its parts to a file in the MPEG Program Stream (without
recoding data).
This application is going to run forever as a service or a daemon, accepting
requests via HTTP interface.
Main cycle is basically following.
// initialization
input=av_alloc_format_context();
input->iformat=av_find_input_format("mpegts");
AVFormatParameters ap;
memset(&ap, 0, sizeof(ap));
ap.prealloced_context=1;
av_open_input_stream(&input,input->pb,"linsys",input->iformat,&ap);
av_find_stream_info(input);
// main loop
while(!is_exiting()){
AVPacket pkt;
av_read_frame(input,&pkt);
int pid=input->streams[pkt.stream_index]->id;
for(< loop over all current tasks, each is an array of 2 elementary PIDs >) {
int pkt_stream_index=pkt.stream_index;
if ( < task[i] needs current pid > ){
< reassing pkt.stream_index to 0 or 1 >;
if(!tasks[i]->header_written){
av_write_header(tasks[i]->output);
tasks[i]->header_written;
}
av_write_frame(m_tasks[i]->output,&pkt)
pkt.stream_index=pkt_stream_index;
}
}
av_free_packet(&pkt);
}
Is above loop correct?
Is av_free_packet() call correct or should I use something else?
Run for the last night, my program has worked for about 1.5 hours, and stopped.
drmingw.exe said that the error was caused by memcpy, called from
ff_combine_frame:
main.exe caused an Access Violation at location 77bd3ec4 in module msvcrt.dll
Writing to location 0f820f5f.
Registers:
eax=000000ff ebx=0f820f57 ecx=000000b7 edx=00000003 esi=167f44b0 edi=0f820f5f
eip=77bd3ec4 esp=0380fd3c ebp=0380fd44 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210206
Call stack:
77BD3EC4 msvcrt.dll:77BD3EC4 memcpy
00AB90D7 avcodec-51.dll:00AB90D7 ff_combine_frame
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