From 3a70c0c95feacb3844d05eebd579fc8189a77eee Mon Sep 17 00:00:00 2001 From: Andreas Unterweger Date: Tue, 27 Jan 2015 09:03:08 +0100 Subject: examples/transcode_aac: generate proper PTS and set the muxer timebase Signed-off-by: Anton Khirnov --- doc/examples/transcode_aac.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'doc/examples') diff --git a/doc/examples/transcode_aac.c b/doc/examples/transcode_aac.c index e0efe2d7b1..60698f719f 100644 --- a/doc/examples/transcode_aac.c +++ b/doc/examples/transcode_aac.c @@ -182,6 +182,10 @@ static int open_output_file(const char *filename, /** Allow the use of the experimental AAC encoder */ (*output_codec_context)->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL; + /** Set the sample rate for the container. */ + stream->time_base.den = input_codec_context->sample_rate; + stream->time_base.num = 1; + /** * Some container formats (like MP4) require global headers to be present * Mark the encoder so that it behaves accordingly. @@ -553,6 +557,9 @@ static int init_output_frame(AVFrame **frame, return 0; } +/** Global timestamp for the audio frames */ +static int64_t pts = 0; + /** Encode one frame worth of audio to the output file. */ static int encode_audio_frame(AVFrame *frame, AVFormatContext *output_format_context, @@ -564,6 +571,12 @@ static int encode_audio_frame(AVFrame *frame, int error; init_packet(&output_packet); + /** Set a timestamp based on the sample rate for the container. */ + if (frame) { + frame->pts = pts; + pts += frame->nb_samples; + } + /** * Encode the audio frame and store it in the temporary packet. * The output audio stream encoder is used to do this. -- cgit v1.2.3