I have already tried the "mp3_audio_48khz" flv live stream and rtmp live stream
in the adobe flash player.
It supports the format and works well.
________________________________
发件人: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> 代表 Yusuke Nakamura
<muken.the.vfrman...@gmail.com>
发送时间: 2016年9月27日 21:15
收件人: FFmpeg development discussions and patches
主题: Re: [FFmpeg-devel] [PATCH] flv format support mp3 audio with 48khz
2016-09-28 0:01 GMT+09:00 <fu.qiup...@hotmail.com>:
> From: frankos2 <frankqpfu@localhost.localdomain>
>
> ---
> libavformat/flvenc.c | 8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
> index 99903f5..296426a 100644
> --- a/libavformat/flvenc.c
> +++ b/libavformat/flvenc.c
> @@ -107,6 +107,13 @@ static int get_audio_flags(AVFormatContext *s,
> AVCodecParameters *par)
> return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ |
> FLV_SAMPLESSIZE_16BIT;
> } else {
> switch (par->sample_rate) {
> + case 48000:
> + if (par->codec_id == AV_CODEC_ID_MP3) {
> + flags |= FLV_SAMPLERATE_44100HZ;
> + break;
> + } else {
> + goto error;
> + }
> case 44100:
> flags |= FLV_SAMPLERATE_44100HZ;
> break;
> @@ -124,6 +131,7 @@ static int get_audio_flags(AVFormatContext *s,
> AVCodecParameters *par)
> break;
> }
> default:
> +error:
> av_log(s, AV_LOG_ERROR,
> "FLV does not support sample rate %d, "
> "choose from (44100, 22050, 11025)\n",
> par->sample_rate);
> --
> 1.7.1
>
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
ffmpeg-devel Info Page<http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>
ffmpeg.org
This list is about FFmpeg development discussions and patches; but not for
bug-reports. Please read the Code-of-conduct. To see the collection of prior
postings to ...
>
Out of the spec I think. Did you confirm that Adobe (Flash Player) allows
48kHz mp3? About AAC, the spec (Adobe Flash Video File Format
Specification) says the Flash Player ignores sample rate in AudioTagHeader,
which is a dummy, and extracts the actual sample rate from AAC bitstream.
But the spec does not say about MP3 in the same way.
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
