From: sharpbai <sharp...@gmail.com> Bug example:
ffmpeg -i a.mp3 -c:a mp3 -ab 32k -ar 44100 -ac 1 b.mp3 The duration of the generated file b.mp3 is wrong on ios safari browser from ios7 to ios10. --- libavformat/mp3enc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c index 3cbf7bd..a55dbf4 100644 --- a/libavformat/mp3enc.c +++ b/libavformat/mp3enc.c @@ -395,8 +395,13 @@ static void mp3_update_xing(AVFormatContext *s) int i, rg_size; /* replace "Xing" identification string with "Info" for CBR files. */ - if (!mp3->has_variable_bitrate) + if (!mp3->has_variable_bitrate) { AV_WL32(mp3->xing_frame + mp3->xing_offset, MKTAG('I', 'n', 'f', 'o')); + av_log(s, AV_LOG_WARNING, + "This is a CBR mp3 file. But its first frame header might be wrong, " + "which result in file duration incorrect on ios browser. " + "Please add \"-write_xing false\" to avoid this problem.\n"); + } AV_WB32(mp3->xing_frame + mp3->xing_offset + 8, mp3->frames); AV_WB32(mp3->xing_frame + mp3->xing_offset + 12, mp3->size); -- 2.2.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel