diff options
author | Anton Khirnov <anton@khirnov.net> | 2016-02-10 16:13:39 +0300 |
---|---|---|
committer | Anton Khirnov <anton@khirnov.net> | 2016-02-24 12:08:24 +0300 |
commit | 9897d9f4e074cdc6c7f2409885ddefe300f18dc7 (patch) | |
tree | 3160a68d4c859d65a8c9f5037348f321a0afa95e /doc | |
parent | c23152a90371bfe971b063781ef4e7d9d5ef9d70 (diff) |
examples/output: convert to codecpar
Diffstat (limited to 'doc')
-rw-r--r-- | doc/examples/output.c | 60 |
1 files changed, 43 insertions, 17 deletions
diff --git a/doc/examples/output.c b/doc/examples/output.c index c883429cfc..cc2cbb1bae 100644 --- a/doc/examples/output.c +++ b/doc/examples/output.c @@ -52,6 +52,7 @@ // a wrapper around a single output AVStream typedef struct OutputStream { AVStream *st; + AVCodecContext *enc; /* pts of the next frame that will be generated */ int64_t next_pts; @@ -85,13 +86,18 @@ static void add_audio_stream(OutputStream *ost, AVFormatContext *oc, exit(1); } - ost->st = avformat_new_stream(oc, codec); + ost->st = avformat_new_stream(oc, NULL); if (!ost->st) { fprintf(stderr, "Could not alloc stream\n"); exit(1); } - c = ost->st->codec; + c = avcodec_alloc_context3(codec); + if (!c) { + fprintf(stderr, "Could not alloc an encoding context\n"); + exit(1); + } + ost->enc = c; /* put sample parameters */ c->sample_fmt = codec->sample_fmts ? codec->sample_fmts[0] : AV_SAMPLE_FMT_S16; @@ -162,9 +168,9 @@ static AVFrame *alloc_audio_frame(enum AVSampleFormat sample_fmt, static void open_audio(AVFormatContext *oc, OutputStream *ost) { AVCodecContext *c; - int nb_samples; + int nb_samples, ret; - c = ost->st->codec; + c = ost->enc; /* open it */ if (avcodec_open2(c, NULL, NULL) < 0) { @@ -187,6 +193,13 @@ static void open_audio(AVFormatContext *oc, OutputStream *ost) c->sample_rate, nb_samples); ost->tmp_frame = alloc_audio_frame(AV_SAMPLE_FMT_S16, AV_CH_LAYOUT_STEREO, 44100, nb_samples); + + /* copy the stream parameters to the muxer */ + ret = avcodec_parameters_from_context(ost->st->codecpar, c); + if (ret < 0) { + fprintf(stderr, "Could not copy the stream parameters\n"); + exit(1); + } } /* Prepare a 16 bit dummy audio frame of 'frame_size' samples and @@ -198,14 +211,14 @@ static AVFrame *get_audio_frame(OutputStream *ost) int16_t *q = (int16_t*)frame->data[0]; /* check if we want to generate more frames */ - if (av_compare_ts(ost->next_pts, ost->st->codec->time_base, + if (av_compare_ts(ost->next_pts, ost->enc->time_base, STREAM_DURATION, (AVRational){ 1, 1 }) >= 0) return NULL; for (j = 0; j < frame->nb_samples; j++) { v = (int)(sin(ost->t) * 10000); - for (i = 0; i < ost->st->codec->channels; i++) + for (i = 0; i < ost->enc->channels; i++) *q++ = v; ost->t += ost->tincr; ost->tincr += ost->tincr2; @@ -224,12 +237,12 @@ static int encode_audio_frame(AVFormatContext *oc, OutputStream *ost, int got_packet; av_init_packet(&pkt); - avcodec_encode_audio2(ost->st->codec, &pkt, frame, &got_packet); + avcodec_encode_audio2(ost->enc, &pkt, frame, &got_packet); if (got_packet) { pkt.stream_index = ost->st->index; - av_packet_rescale_ts(&pkt, ost->st->codec->time_base, ost->st->time_base); + av_packet_rescale_ts(&pkt, ost->enc->time_base, ost->st->time_base); /* Write the compressed frame to the media file. */ if (av_interleaved_write_frame(oc, &pkt) != 0) { @@ -324,13 +337,18 @@ static void add_video_stream(OutputStream *ost, AVFormatContext *oc, exit(1); } - ost->st = avformat_new_stream(oc, codec); + ost->st = avformat_new_stream(oc, NULL); if (!ost->st) { fprintf(stderr, "Could not alloc stream\n"); exit(1); } - c = ost->st->codec; + c = avcodec_alloc_context3(codec); + if (!c) { + fprintf(stderr, "Could not alloc an encoding context\n"); + exit(1); + } + ost->enc = c; /* Put sample parameters. */ c->bit_rate = 400000; @@ -387,8 +405,9 @@ static AVFrame *alloc_picture(enum AVPixelFormat pix_fmt, int width, int height) static void open_video(AVFormatContext *oc, OutputStream *ost) { AVCodecContext *c; + int ret; - c = ost->st->codec; + c = ost->enc; /* open the codec */ if (avcodec_open2(c, NULL, NULL) < 0) { @@ -414,6 +433,13 @@ static void open_video(AVFormatContext *oc, OutputStream *ost) exit(1); } } + + /* copy the stream parameters to the muxer */ + ret = avcodec_parameters_from_context(ost->st->codecpar, c); + if (ret < 0) { + fprintf(stderr, "Could not copy the stream parameters\n"); + exit(1); + } } /* Prepare a dummy image. */ @@ -448,10 +474,10 @@ static void fill_yuv_image(AVFrame *pict, int frame_index, static AVFrame *get_video_frame(OutputStream *ost) { - AVCodecContext *c = ost->st->codec; + AVCodecContext *c = ost->enc; /* check if we want to generate more frames */ - if (av_compare_ts(ost->next_pts, ost->st->codec->time_base, + if (av_compare_ts(ost->next_pts, c->time_base, STREAM_DURATION, (AVRational){ 1, 1 }) >= 0) return NULL; @@ -494,7 +520,7 @@ static int write_video_frame(AVFormatContext *oc, OutputStream *ost) AVPacket pkt = { 0 }; int got_packet = 0; - c = ost->st->codec; + c = ost->enc; frame = get_video_frame(ost); @@ -525,7 +551,7 @@ static int write_video_frame(AVFormatContext *oc, OutputStream *ost) static void close_stream(AVFormatContext *oc, OutputStream *ost) { - avcodec_close(ost->st->codec); + avcodec_free_context(&ost->enc); av_frame_free(&ost->frame); av_frame_free(&ost->tmp_frame); sws_freeContext(ost->sws_ctx); @@ -614,8 +640,8 @@ int main(int argc, char **argv) while (encode_video || encode_audio) { /* select the stream to encode */ if (encode_video && - (!encode_audio || av_compare_ts(video_st.next_pts, video_st.st->codec->time_base, - audio_st.next_pts, audio_st.st->codec->time_base) <= 0)) { + (!encode_audio || av_compare_ts(video_st.next_pts, video_st.enc->time_base, + audio_st.next_pts, audio_st.enc->time_base) <= 0)) { encode_video = !write_video_frame(oc, &video_st); } else { encode_audio = !process_audio_stream(oc, &audio_st); 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