ffmpeg | branch: master | James Almer <jamr...@gmail.com> | Wed Dec 11 13:30:23 2024 -0300| [76049d1c4564a6a03c467b1f9b0bc853bc971769] | committer: James Almer
avformat/iamf_writer: fix setting num_samples_per_frame for OPUS As per section 3.11.1 of the IAMF spec, the sample rate used in Codec Config for Opus shall be 48kHz, regardless of the original sample rate used during encoding. Signed-off-by: James Almer <jamr...@gmail.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=76049d1c4564a6a03c467b1f9b0bc853bc971769 --- libavformat/iamf_writer.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/libavformat/iamf_writer.c b/libavformat/iamf_writer.c index f15dabcb3e..467f839baf 100644 --- a/libavformat/iamf_writer.c +++ b/libavformat/iamf_writer.c @@ -112,9 +112,17 @@ static int fill_codec_config(IAMFContext *iamf, const AVStreamGroup *stg, int j, ret = 0; codec_config->codec_id = st->codecpar->codec_id; - codec_config->sample_rate = st->codecpar->sample_rate; codec_config->codec_tag = st->codecpar->codec_tag; - codec_config->nb_samples = st->codecpar->frame_size; + switch (codec_config->codec_id) { + case AV_CODEC_ID_OPUS: + codec_config->sample_rate = 48000; + codec_config->nb_samples = av_rescale(st->codecpar->frame_size, 48000, st->codecpar->sample_rate); + break; + default: + codec_config->sample_rate = st->codecpar->sample_rate; + codec_config->nb_samples = st->codecpar->frame_size; + break; + } populate_audio_roll_distance(codec_config); if (st->codecpar->extradata_size) { codec_config->extradata = av_memdup(st->codecpar->extradata, st->codecpar->extradata_size); @@ -183,9 +191,9 @@ static int add_param_definition(IAMFContext *iamf, AVIAMFParamDefinition *param, } if (codec_config) { if (!param->duration) - param->duration = codec_config->nb_samples; + param->duration = av_rescale(codec_config->nb_samples, param->parameter_rate, codec_config->sample_rate); if (!param->constant_subblock_duration) - param->constant_subblock_duration = codec_config->nb_samples; + param->constant_subblock_duration = av_rescale(codec_config->nb_samples, param->parameter_rate, codec_config->sample_rate); } param_definition = av_mallocz(sizeof(*param_definition)); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
