> On Jun 29, 2015, at 6:12 AM, Guofeng Zhang <guofen...@gmail.com> wrote: > > Hi, > > The book "FFmpeg Basic" described that FFmpeg recognizes 5 stream types: > audio (a), attachment (t), data (d), subtitle (s) and video (v). > > I do not understand what the data and attachment type specified and what > they are used for. > > Is there any introduction about data and attachment stream type on the > internet?
Attachments could be liner notes, related images, metadata files, fonts, etc. Here are some samples: http://samples.ffmpeg.org/Matroska/size_change/azumi.mkv http://samples.ffmpeg.org/Matroska/120fps-mkv/[KTKJ][stratos4_advance][01][big5][E72C0C1D].mkv <http://samples.ffmpeg.org/Matroska/120fps-mkv/%5BKTKJ%5D%5Bstratos4_advance%5D%5B01%5D%5Bbig5%5D%5BE72C0C1D%5D.mkv> http://samples.ffmpeg.org/Matroska/aac-sbr-ffaac-slow.mkv <http://samples.ffmpeg.org/Matroska/aac-sbr-ffaac-slow.mkv> http://samples.ffmpeg.org/Matroska/haruhi.mkv <http://samples.ffmpeg.org/Matroska/haruhi.mkv> http://samples.ffmpeg.org/Matroska/subtitles/embedded_ass/embedded_ass_problems.mkv <http://samples.ffmpeg.org/Matroska/subtitles/embedded_ass/embedded_ass_problems.mkv> Data tracks would be for things like timecode, navigation items, cmml, streaming tracks. See samples: http://samples.ffmpeg.org/A-codecs/AAC/Bandit.mp4 <http://samples.ffmpeg.org/A-codecs/AAC/Bandit.mp4> http://samples.ffmpeg.org/A-codecs/AAC/ct_nero-heaac.mp4 <http://samples.ffmpeg.org/A-codecs/AAC/ct_nero-heaac.mp4> http://samples.ffmpeg.org/A-codecs/AC3/a52dec-streams/zorro <http://samples.ffmpeg.org/A-codecs/AC3/a52dec-streams/zorro> Best Regards, Dave Rice _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
