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examples/remuxing: Don't use stack packet 

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-09-03 22:48:45 +02:00
parent 78426da3f4
commit 53f374c08d
1 changed files with 20 additions and 13 deletions
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33
doc/examples/remuxing.c
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@ -47,7 +47,7 @@ int main(int argc, char **argv)
{ {
const AVOutputFormat *ofmt = NULL; const AVOutputFormat *ofmt = NULL;
AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL; AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;
AVPacket pkt; AVPacket *pkt = NULL;
const char *in_filename, *out_filename; const char *in_filename, *out_filename;
int ret, i; int ret, i;
int stream_index = 0; int stream_index = 0;
@ -65,6 +65,12 @@ int main(int argc, char **argv)
in_filename = argv[1]; in_filename = argv[1];
out_filename = argv[2]; out_filename = argv[2];
pkt = av_packet_alloc();
if (!pkt) {
fprintf(stderr, "Could not allocate AVPacket\n");
goto end;
}
if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) { if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) {
fprintf(stderr, "Could not open input file '%s'", in_filename); fprintf(stderr, "Could not open input file '%s'", in_filename);
goto end; goto end;
@ -140,27 +146,27 @@ int main(int argc, char **argv)
while (1) { while (1) {
AVStream *in_stream, *out_stream; AVStream *in_stream, *out_stream;
ret = av_read_frame(ifmt_ctx, &pkt); ret = av_read_frame(ifmt_ctx, pkt);
if (ret < 0) if (ret < 0)
break; break;
in_stream = ifmt_ctx->streams[pkt.stream_index]; in_stream = ifmt_ctx->streams[pkt->stream_index];
if (pkt.stream_index >= stream_mapping_size || if (pkt->stream_index >= stream_mapping_size ||
stream_mapping[pkt.stream_index] < 0) { stream_mapping[pkt->stream_index] < 0) {
av_packet_unref(&pkt); av_packet_unref(pkt);
continue; continue;
} }
pkt.stream_index = stream_mapping[pkt.stream_index]; pkt->stream_index = stream_mapping[pkt->stream_index];
out_stream = ofmt_ctx->streams[pkt.stream_index]; out_stream = ofmt_ctx->streams[pkt->stream_index];
log_packet(ifmt_ctx, &pkt, "in"); log_packet(ifmt_ctx, pkt, "in");
/* copy packet */ /* copy packet */
av_packet_rescale_ts(&pkt, in_stream->time_base, out_stream->time_base); av_packet_rescale_ts(pkt, in_stream->time_base, out_stream->time_base);
pkt.pos = -1; pkt->pos = -1;
log_packet(ofmt_ctx, &pkt, "out"); log_packet(ofmt_ctx, pkt, "out");
ret = av_interleaved_write_frame(ofmt_ctx, &pkt); ret = av_interleaved_write_frame(ofmt_ctx, pkt);
/* pkt is now blank (av_interleaved_write_frame() takes ownership of /* pkt is now blank (av_interleaved_write_frame() takes ownership of
* its contents and resets pkt), so that no unreferencing is necessary. * its contents and resets pkt), so that no unreferencing is necessary.
* This would be different if one used av_write_frame(). */ * This would be different if one used av_write_frame(). */
@ -172,6 +178,7 @@ int main(int argc, char **argv)
av_write_trailer(ofmt_ctx); av_write_trailer(ofmt_ctx);
end: end:
av_packet_free(&pkt);
avformat_close_input(&ifmt_ctx); avformat_close_input(&ifmt_ctx);