我用Java编写了一个简单的MJPEG流媒体。
由于它具有非常具体的应用，我不得不使用Wireshark嗅探器对GStreamer发送的rtp数据包进行逆向工程。反过来，GStreamer只是重新播放从特定相机拍摄的mjpeg avi文件。
第一种也是最直接的方法是将数据包准备为数据数组并将其发送给使用live555库的消费者，特别是VLC播放器。我很好地填充了rtp标题，因此内部有效负载是硬编码的;在我的实验中，VLC成功地显示了编码屏幕，即它很好地解码了硬编码的rtp有效载荷。
因此，这是十六进制视图中前两个数据包有效负载（总共25个）的值：
String[] hexArray =
{
"0000000000ffa05a00000080100b0c0e0c0a100e0d0e1211101318281a181616183123251d283a333d3c3933383740485c4e404457453738506d51575f626768673e4d71797064785c6567631112121815182f1a1a2f634238426363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363636363ad8a5a00296801692800a5ed40052d001450014b40052f5a004dbce694e68000c7d29435002e452e68017a8a2800c51400518c500141a004c5348a0031498a005a2800a2800a2800a28014514001a2800a51400b450014500251400941a004a2800a5a004c668a004a5a00292800a5a0029734006697340052d0019a5cd004d15c4917dd6e3d0d5d8751523f7831ee2802d32c3728090187622aacba79eb1367d8d00547478db0ea54fbd20a0008a4e94005140052e6801411de9719a00694c8e29bb4d001d29680145385002629306800e476a379e38a00a9711bc97d0b80762839fd2926b677ba128e9b81340178e49a4a0028a004a2800a2801ebcd0450018a422801299707103ffba6802b45129d1d1d87ce4819a6c56ed2c45d0f4ed4010c91329c329151b479a008da32298548a004a334012a4acbdea64ba1d186280275955ba1a75002e714e0fc608cd002ec46e876d4b1d94afca1523d734012fd825c7381504700695e3923f987dd6cf7a009134fee5003f5a71b50a083b4714019de63472ba30fba719f5a956e79a0099270dc77a833feb1cf6a0087c3d8315c49d8c86b54d001d39a963b9963e8d91e86802c2df82312c60fd283159ce3e5f9188fa50042fa5b6331386fad5592d668cfcc87ea28021a280108a4c500262931400845215a00694cd31d38a00a8edf3800f5ab7167cb258f4a004a4ed4007bd283400b450014b40051400b4500140a005cd1400b45002d2e2801368349b481807a50028c8a5dd8eb400bb8529a000506800a2800a280034dc50018a4a0028a0028a0028a00296800a2800a05002d1400b4500145002628c5001494009de96800a280128a00292800a2800a5a0028068017345002e696800a5cd00392578db2848abb0ea2540120dc3d6802ec734370080437b1a8a5b147c98ced3e9da8029c904917df5e3d474a8e801297140094b400519a007034bd6801a541a69522800cfad2e680141a703400b46280136d2e280168c0228010ad26d34006293140062931400e14fc50021146df949c8a006e3bd57bdff8f57f718a0046f9747b65f5c1a92c86db66f76a0091803503db46dd06d3ed4015ded9d738f9876aaee9ce08c1a0089a3a8ca500260d1400a1b078a952775ef9a009d2e54f0dc54c1c1e86801c0d3d6464395623e940121bb988ff00586985d8924b1c9a008e57900cef6fceab34ae5c61cf1d6802c8903f2c050608dcf1c6680226b778db767a75fa5131db67330e323028022d29bc8d3e3ec5f923deafa5c83de80255954f7a76e1400b45003d26923395722ac25fb8e1d430a007f99693ff00ac4009f6a6369b138cc52fe7401564b09d3f8770f6aaecaca70ca41f7a0069146280022931400dc5262802bc96b193bb6f23de95b88cfd2800a3b5001411400500e68014519a00052d002f4a2800a2800a05002d2d0019a5cd002e68a005a050018e68c500041ed4738a003340606801720d2d001450036908c50025140051400514001a5a0028a002945002d250014b4005140052d002518a004c5140084514005140098a08a0028a00292800a280168a005a33400b9a5a00296801c188390715662be963c03f30f7a00bd15e4528c13b4fa1a596d62979c6d6f51401525b2953ee8de3d4557f62306800a4c50014a680014b400669d9a000804629bb3d2801304500f3400b9a706a00506945001462800a28016930280108a4c50018a70340013450004554d40edb5ff810fe74005e7cb6b6d1f60b9a9edc62", //1
"000004ec00ffa05ad23f53c9a0075260500211cd35a35718619a00aef66adf74e2abc96cebd5723da802131d4663a00615c52722800cd2ab9071934013a5cb0ebcd4cb72a7af140130604706968003cd44f0ab1c8e0d0048221b786e7de8daebd680012718a64f189ad9a20719e45003e2b74fb3c48c7e64183ef4c7b47ce55b1400d2658f191d0734b1dd6680275ba1532cc08eb400f0c294e2800a504af20e0d004e97b3271907eb538bc8a5189a3feb40086d6d67e51b6fb0a824d324519460d40151e0963fbc845474005262801920e2abce76c4dec2801d4940051d4d0021eb4a38a00297140074a5068003d68cd0014a38140051400b466800a5a0029680168cd0028a075a005ef4668014e29314009b79cd1839ce6800e7346ef6a000114b40084669b834008296800068a005a4a00296800a5a0028a0031450014a0d002d25002d140098a280131477a004a2800a280131462800a2800a2800a2800a2800a5cd002d2d0014b9a00506a68aea48beeb71e86802f43a8231c48369f5ed561922b850480c3b11401525b060731b6e1e86aaba321c3020fbd00251400519a005a41400a0d381a005e0d26d1400d2b8a43c50000d3b3400a1a9c0d0014500145001d697140098a5071400871da9a3ad002e6a9ea4730aafabaff3a005d48fef2251d92acc38fb3463da801d8a154b1c0ea68002b8241ea28c500376d211400c7851faad5692cffb87f034015e48193ef2d4263a00618e98460d001466801eb2329e0d4eb72470c280265995bbd48083400b9a5dc68011f0c3a60fad33045003be6039a72c8477a0078914f0c3229ad04321ce3140113da1504a1a882cabfc3400e5b82ad86e2a64ba05b19e940132ce0f7a915c3500381a5a004a952e254fbae7f1a00b09a81e049183f4a5c594e390149fc280227d3323314991ef55a4b39e3ce53207714015241818354af8e2dcfb9a009e92800029318a004ef4b400519cd002d038a005cd140052d00140a0028a00052e79a005a280169450014b40051400b4b400521a000d2e280108a4d9ce6800c11df349c8eb40099e69280168a005a4a005a3b500252d0014b4005140051400b40a005a28016931400946280128c500149400514001a4a0028a0028a004a280168a005a2801734b9a00296800cd491c8f19ca311401761d408e2519f7156d648a71c10d9ed4010cb60a7988edf6354e58258befaf1ea3a50047450019a5cd0019a280141a50d400b9a0806801a57d29bcd00283466801c1a9dba801783498a0028068017349400628228012a95f73244bfed668013516cdd7d302ae8e2341ed40052e6800dc73934a2800146280108cd3769a0031eb51496d1b83c60fb500577b361f77e6aaaf110704608a008da3a618e801b82282680141c53d6565e8680274b9fef0a996556e86801f9a5a0050d8a3e461c8e7d6800f2f8e0e693e65eb400a1cf4cd49bc746140018e293d326a07b21bb2a714010b452a1c0e68499875c8a009d6e7d4d4cb7008e680241203de9fb85002f1498e6801caee872ac454e97d2a8c361beb4014f559567f28c636b03f37b8ac7d41c2f94a7a33806802d5140094b400d22968010d274a005cd2d0014a0d0014500145002d1400b45001d296800ef477a005a51400a0f34b40051400b40e7ad0018e694f4a004a05002d21140098a42b91400d2b4878a00514b4001a4a005a280168a0028a0028a00296800cd19a005a33400b450025262801283400521a0028a0028a004a2800a280128a002945002d19a005a01a005a5a0001a72b10410706802e417ee9c3fcc3f5abb0dd4530c6707d0d0012da452f206d3ea2a9cb672c63206f1ea2802be292800a2800a5a0039a5cd0019a5a00695f4a6f22800cd2eea0050d4e0d400bba8cd0019a5cd002e68a004c550ba39d42dd3d89fa7228021ba7dd76deed5a8dc1c7b500369680128cd002834b", //2
根据规范，第一个数据包的第一个字节是：
0000000000ffa05a
这是特定类型，片段偏移，类型，Q，宽度，高度，MBZ，精度，长度
以0000008010开始并以636363结尾的下一个数据是128字节长的量化表。
所以，问题是它之后的数据是什么？
ad8a5a0029
根据规格，没有任何一个可以被识别为可能的JPEG标记，所以问题是所使用的编码是什么以及如何使用这种特定编码对我喜欢的图像进行编码？
尝试以http://www.media.mit.edu/pia/Research/deepview/src/JpegEncoder.java的方式编码适用于jpeg文件，但不会使用VLC的live555解码。