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examples/encode_video: allocate the packet dynamically

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AVPackets on stack are discouraged.
This commit is contained in:
Anton Khirnov 2016-10-20 11:03:20 +02:00
parent 5f102a9559
commit 59ab9e8ba1
1 changed files with 8 additions and 7 deletions
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15
doc/examples/encode_video.c
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@ -69,7 +69,7 @@ int main(int argc, char **argv)
int i, ret, x, y; int i, ret, x, y;
FILE *f; FILE *f;
AVFrame *picture; AVFrame *picture;
AVPacket pkt; AVPacket *pkt;
uint8_t endcode[] = { 0, 0, 1, 0xb7 }; uint8_t endcode[] = { 0, 0, 1, 0xb7 };
if (argc <= 1) { if (argc <= 1) {
@ -90,6 +90,10 @@ int main(int argc, char **argv)
c = avcodec_alloc_context3(codec); c = avcodec_alloc_context3(codec);
picture = av_frame_alloc(); picture = av_frame_alloc();
pkt = av_packet_alloc();
if (!pkt)
exit(1);
/* put sample parameters */ /* put sample parameters */
c->bit_rate = 400000; c->bit_rate = 400000;
/* resolution must be a multiple of two */ /* resolution must be a multiple of two */
@ -127,10 +131,6 @@ int main(int argc, char **argv)
/* encode 1 second of video */ /* encode 1 second of video */
for(i=0;i<25;i++) { for(i=0;i<25;i++) {
av_init_packet(&pkt);
pkt.data = NULL; // packet data will be allocated by the encoder
pkt.size = 0;
fflush(stdout); fflush(stdout);
/* make sure the frame data is writable */ /* make sure the frame data is writable */
@ -157,11 +157,11 @@ int main(int argc, char **argv)
picture->pts = i; picture->pts = i;
/* encode the image */ /* encode the image */
encode(c, picture, &pkt, f); encode(c, picture, pkt, f);
} }
/* flush the encoder */ /* flush the encoder */
encode(c, NULL, &pkt, f); encode(c, NULL, pkt, f);
/* add sequence end code to have a real MPEG file */ /* add sequence end code to have a real MPEG file */
fwrite(endcode, 1, sizeof(endcode), f); fwrite(endcode, 1, sizeof(endcode), f);
@ -169,6 +169,7 @@ int main(int argc, char **argv)
avcodec_free_context(&c); avcodec_free_context(&c);
av_frame_free(&picture); av_frame_free(&picture);
av_packet_free(&pkt);
return 0; return 0;
} }