On Thu, Apr 14, 2011 at 01:32:40PM +0200, Luca Barbato wrote:
> ---
> libavformat/output-example.c | 43
> +++++++++++++++++++++++++++++++++++++++++-
> 1 files changed, 42 insertions(+), 1 deletions(-)
>
> diff --git a/libavformat/output-example.c b/libavformat/output-example.c
> index 27db78c..1a0a6db 100644
> --- a/libavformat/output-example.c
> +++ b/libavformat/output-example.c
> @@ -416,6 +416,44 @@ static void close_video(AVFormatContext *oc, AVStream
> *st)
> av_free(video_outbuf);
> }
>
> +static AVStream *add_data_stream(AVFormatContext *oc, enum CodecID codec_id)
> +{
> + AVCodecContext *c;
> + AVStream *st;
> +
> + st = av_new_stream(oc, 0);
> + if (!st) {
> + fprintf(stderr, "Could not alloc stream\n");
> + exit(1);
> + }
> +
> + c = st->codec;
> + c->codec_id = codec_id;
> + c->codec_type = AVMEDIA_TYPE_DATA;
> +
> + c->time_base.den = STREAM_FRAME_RATE;
> + c->time_base.num = 1;
> +
> + // some formats want stream headers to be separate
> + if(oc->oformat->flags & AVFMT_GLOBALHEADER)
> + c->flags |= CODEC_FLAG_GLOBAL_HEADER;
> +
> + return st;
> +}
> +
> +static void write_data_frame(AVFormatContext *oc, AVStream *st, char *text)
> +{
> + AVPacket pkt;
> + av_init_packet(&pkt);
> + pkt.flags |= AV_PKT_FLAG_KEY;
> + pkt.stream_index= st->index;
> + pkt.data = text;
> + pkt.size= strlen(text);
align vertically here please
> + av_interleaved_write_frame(oc, &pkt);
> +}
> +
> +
> /**************************************************************/
> /* media file output */
>
> @@ -424,7 +462,7 @@ int main(int argc, char **argv)
> const char *filename;
> AVOutputFormat *fmt;
> AVFormatContext *oc;
> - AVStream *audio_st, *video_st;
> + AVStream *audio_st, *video_st, *data_st;
> double audio_pts, video_pts;
> int i;
>
> @@ -474,6 +512,8 @@ int main(int argc, char **argv)
> audio_st = add_audio_stream(oc, fmt->audio_codec);
> }
>
> + data_st = add_data_stream(oc, CODEC_ID_TEXT);
> +
> /* set the output parameters (must be done even if no
> parameters). */
> if (av_set_parameters(oc, NULL) < 0) {
> @@ -522,6 +562,7 @@ int main(int argc, char **argv)
> write_audio_frame(oc, audio_st);
> } else {
> write_video_frame(oc, video_st);
> + write_data_frame(oc, data_st, "Test");
> }
> }
>
> --
And what happens if it's impossible to add data stream here?
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