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Code Issues Releases Activity

doc/examples/muxing: convert to new encoding API

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This commit is contained in:
Anton Khirnov
2020-04-11 16:02:28 +02:00
parent 3bfe20389d
commit d8de9d46f2
1 changed files with 39 additions and 56 deletions
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95
doc/examples/muxing.c
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@@ -78,15 +78,45 @@ static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt)
pkt->stream_index); pkt->stream_index);
} }
static int write_frame(AVFormatContext *fmt_ctx, const AVRational *time_base, AVStream *st, AVPacket *pkt) static int write_frame(AVFormatContext *fmt_ctx, AVCodecContext *c,
AVStream *st, AVFrame *frame)
{ {
/* rescale output packet timestamp values from codec to stream timebase */ int ret;
av_packet_rescale_ts(pkt, *time_base, st->time_base);
pkt->stream_index = st->index;
/* Write the compressed frame to the media file. */ // send the frame to the encoder
log_packet(fmt_ctx, pkt); ret = avcodec_send_frame(c, frame);
return av_interleaved_write_frame(fmt_ctx, pkt); if (ret < 0) {
fprintf(stderr, "Error sending a frame to the encoder: %s\n",
av_err2str(ret));
exit(1);
}
while (ret >= 0) {
AVPacket pkt = { 0 };
ret = avcodec_receive_packet(c, &pkt);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
break;
else if (ret < 0) {
fprintf(stderr, "Error encoding a frame: %s\n", av_err2str(ret));
exit(1);
}
/* rescale output packet timestamp values from codec to stream timebase */
av_packet_rescale_ts(&pkt, c->time_base, st->time_base);
pkt.stream_index = st->index;
/* Write the compressed frame to the media file. */
log_packet(fmt_ctx, &pkt);
ret = av_interleaved_write_frame(fmt_ctx, &pkt);
av_packet_unref(&pkt);
if (ret < 0) {
fprintf(stderr, "Error while writing output packet: %s\n", av_err2str(ret));
exit(1);
}
}
return ret == AVERROR_EOF ? 1 : 0;
} }
/* Add an output stream. */ /* Add an output stream. */
@@ -309,13 +339,10 @@ static AVFrame *get_audio_frame(OutputStream *ost)
static int write_audio_frame(AVFormatContext *oc, OutputStream *ost) static int write_audio_frame(AVFormatContext *oc, OutputStream *ost)
{ {
AVCodecContext *c; AVCodecContext *c;
AVPacket pkt = { 0 }; // data and size must be 0;
AVFrame *frame; AVFrame *frame;
int ret; int ret;
int got_packet;
int dst_nb_samples; int dst_nb_samples;
av_init_packet(&pkt);
c = ost->enc; c = ost->enc;
frame = get_audio_frame(ost); frame = get_audio_frame(ost);
@@ -349,22 +376,7 @@ static int write_audio_frame(AVFormatContext *oc, OutputStream *ost)
ost->samples_count += dst_nb_samples; ost->samples_count += dst_nb_samples;
} }
ret = avcodec_encode_audio2(c, &pkt, frame, &got_packet); return write_frame(oc, c, ost->st, frame);
if (ret < 0) {
fprintf(stderr, "Error encoding audio frame: %s\n", av_err2str(ret));
exit(1);
}
if (got_packet) {
ret = write_frame(oc, &c->time_base, ost->st, &pkt);
if (ret < 0) {
fprintf(stderr, "Error while writing audio frame: %s\n",
av_err2str(ret));
exit(1);
}
}
return (frame || got_packet) ? 0 : 1;
} }
/**************************************************************/ /**************************************************************/
@@ -506,37 +518,8 @@ static AVFrame *get_video_frame(OutputStream *ost)
*/ */
static int write_video_frame(AVFormatContext *oc, OutputStream *ost) static int write_video_frame(AVFormatContext *oc, OutputStream *ost)
{ {
int ret; return write_frame(oc, ost->enc, ost->st, get_video_frame(ost));
AVCodecContext *c;
AVFrame *frame;
int got_packet = 0;
AVPacket pkt = { 0 };
c = ost->enc;
frame = get_video_frame(ost);
av_init_packet(&pkt);
/* encode the image */
ret = avcodec_encode_video2(c, &pkt, frame, &got_packet);
if (ret < 0) {
fprintf(stderr, "Error encoding video frame: %s\n", av_err2str(ret));
exit(1);
}
if (got_packet) {
ret = write_frame(oc, &c->time_base, ost->st, &pkt);
} else {
ret = 0;
}
if (ret < 0) {
fprintf(stderr, "Error while writing video frame: %s\n", av_err2str(ret));
exit(1);
}
return (frame || got_packet) ? 0 : 1;
} }
static void close_stream(AVFormatContext *oc, OutputStream *ost) static void close_stream(AVFormatContext *oc, OutputStream *ost)