Android, use Mediacodec with libstreaming -

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i've problem library

https://github.com/fyhertz/libstreaming

it allows send via wireless streaming of photocamera, use 3 methods: 2 mediacodec , 1 mediarecorder. modify it, , have use mediacodec;however first of tried code of example 2 of library, i've found same error: log tell me device can use mediacodec, set encoder , when test decoder fall , buffer filled -1.

this method in encoderdebugger class exception occurs, kind soul can me please?

private long decode(boolean withprefix) {     int n =3, = 0, j = 0;     long elapsed = 0, = timestamp();     int decinputindex = 0, decoutputindex = 0;     bytebuffer[] decinputbuffers = mdecoder.getinputbuffers();     bytebuffer[] decoutputbuffers = mdecoder.getoutputbuffers();     bufferinfo info = new bufferinfo();      while (elapsed<3000000) {          // feeds decoder nal unit         if (i<nb_encoded) {              decinputindex = mdecoder.dequeueinputbuffer(1000000/framerate);             if (decinputindex>=0) {                 int l1 = decinputbuffers[decinputindex].capacity();                 int l2 = mvideo[i].length;                 decinputbuffers[decinputindex].clear();                  if ((withprefix && hasprefix(mvideo[i])) || (!withprefix && !hasprefix(mvideo[i]))) {                      check(l1>=l2, "the decoder input buffer not big enough (nal="+l2+", capacity="+l1+").");                     decinputbuffers[decinputindex].put(mvideo[i],0,mvideo[i].length);                 } else if (withprefix && !hasprefix(mvideo[i])) {                      check(l1>=l2+4, "the decoder input buffer not big enough (nal="+(l2+4)+", capacity="+l1+").");                     decinputbuffers[decinputindex].put(new byte[] {0,0,0,1});                     decinputbuffers[decinputindex].put(mvideo[i],0,mvideo[i].length);                 } else if (!withprefix && hasprefix(mvideo[i])) {                      check(l1>=l2-4, "the decoder input buffer not big enough (nal="+(l2-4)+", capacity="+l1+").");                     decinputbuffers[decinputindex].put(mvideo[i],4,mvideo[i].length-4);                 }                  mdecoder.queueinputbuffer(decinputindex, 0, l2, timestamp(), 0);                 i++;             } else {                 if (verbose) log.d(tag,"no buffer available !7");             }         }          // tries decoded image          decoutputindex = mdecoder.dequeueoutputbuffer(info, 1000000/framerate);         if (decoutputindex == mediacodec.info_output_buffers_changed) {             decoutputbuffers = mdecoder.getoutputbuffers();         } else if (decoutputindex == mediacodec.info_output_format_changed) {             mdecoutputformat = mdecoder.getoutputformat();         } else if (decoutputindex>=0) {             if (n>2) {                 // have encoded , decoded image !                 int length = info.size;                 mdecodedvideo[j] = new byte[length];                 decoutputbuffers[decoutputindex].clear();                 decoutputbuffers[decoutputindex].get(mdecodedvideo[j], 0, length);                 // converts decoded frame nv21                 converttonv21(j);                 if (j>=nb_decoded-1) {                      flushmediacodec(mdecoder);                     if (verbose) log.v(tag, "decoding "+n+" frames took "+elapsed/1000+" ms");                     return elapsed;                 }                 j++;             }             mdecoder.releaseoutputbuffer(decoutputindex, false);             n++;         }            elapsed = timestamp() - now;     }      throw new runtimeexception("the decoder did not decode anything.");  }

here's suggestions:

(1) check settings of encoder , decoder, , make sure match. example, revolution , color format same.

(2) make sure first packet generated encoder has been sent , pushed decoder. packet defines basic settings of video stream.

(3) decoder buffers 5-10 frames. data in buffer invalid few hundred ms.

(4) while initiating decoder, set surface null. otherwise output buffer read surface , released automatically.


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