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<DIV><FONT color=#000080 size=2 face=Verdana>I guess the data may be
audio frame, not video frame. The data should be filtered before sending
at the server end.</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Verdana></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Verdana></FONT> </DIV>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana>2012-03-23 </FONT></DIV><FONT
color=#000080 size=2 face=Verdana>
<HR style="WIDTH: 100px" align=left color=#b5c4df SIZE=1>
</FONT>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana><SPAN>huanggh0108</SPAN>
</FONT></DIV>
<HR color=#b5c4df SIZE=1>
<DIV><FONT size=2 face=Verdana><STRONG>发件人：</STRONG> Yinxia </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>发送时间：</STRONG> 2012-03-23 00:52:01
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>收件人：</STRONG> libav-user </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>抄送：</STRONG> </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>主题：</STRONG> [Libav-user] Decoding
Problem (got_picture always return 0) </FONT></DIV>
<DIV><FONT size=2 face=Verdana></FONT> </DIV>
<DIV><FONT size=2 face=Verdana>
<DIV>Hi dear all,</DIV>
<DIV></DIV>
<DIV>I am a newbie to ffmpeg and I would like to decode the bitstream, which is</DIV>
<DIV>encoded using libx264 at the server end and sent to client frame by frame.</DIV>
<DIV></DIV>
<DIV>I wrote a function decodeFrame to decode this bitstream frame by frame,</DIV>
<DIV>this function is called in a loop, each time recieves a new frame:</DIV>
<DIV></DIV>
<DIV>void decodeFrame( int size, unsigned char *data)</DIV>
<DIV>{</DIV>
<DIV> avpkt.size = size;</DIV>
<DIV>avpkt.data = (uint8_t *)(data);</DIV>
<DIV></DIV>
<DIV>/*decode each frame*/</DIV>
<DIV> len = avcodec_decode_video2(c, picture, &got_picture, avpkt.size);</DIV>
<DIV>if (len < 0) {</DIV>
<DIV> fprintf(stderr, "[avcodec][Err] Error while decoding frame %d\n",frame);</DIV>
<DIV> exit(1);</DIV>
<DIV>}</DIV>
<DIV> if (got_picture) {</DIV>
<DIV>printf("[avcodec] Saving frame %3d\n",frame);</DIV>
<DIV> fflush(stdout);</DIV>
<DIV>_snprintf(buf, sizeof(buf), "/temp/video%d.pgm", frame); // not found</DIV>
<DIV> pgmSave(picture->data[0], picture->linesize[0], c->width, c->height, buf);</DIV>
<DIV> frame++;</DIV>
<DIV>}</DIV>
<DIV>}</DIV>
<DIV></DIV>
<DIV>I can successfully get the value of len, which is exactly the size of</DIV>
<DIV>frame, however, *the value of *got_picture *is always 0. *Can anyone help</DIV>
<DIV>me with this?</DIV>
<DIV>*</DIV>
<DIV>*</DIV>
<DIV>PS. this is the init function of decoder.</DIV>
<DIV></DIV>
<DIV>void initDecoder()</DIV>
<DIV>{</DIV>
<DIV>avcodec_register_all();</DIV>
<DIV></DIV>
<DIV>av_init_packet(&avpkt);</DIV>
<DIV>memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);</DIV>
<DIV> printf("[avcodec] Frame decoding initializing\n");</DIV>
<DIV></DIV>
<DIV>/*choose correct video decoder*/</DIV>
<DIV> codec = avcodec_find_decoder(CODEC_ID_MPEG4);</DIV>
<DIV>if ( !codec ) {</DIV>
<DIV>fprintf(stderr, "[avcodec][Err] codec not found!\n");</DIV>
<DIV> exit(1);</DIV>
<DIV>}</DIV>
<DIV></DIV>
<DIV>c = avcodec_alloc_context3(codec);</DIV>
<DIV> picture = avcodec_alloc_frame();</DIV>
<DIV></DIV>
<DIV>if(codec->capabilities&CODEC_CAP_TRUNCATED)</DIV>
<DIV> c->flags|= CODEC_FLAG_TRUNCATED; /* we do not send complete</DIV>
<DIV>frames */</DIV>
<DIV></DIV>
<DIV> /* open it */</DIV>
<DIV> if (avcodec_open2(c, codec, NULL) < 0) {</DIV>
<DIV> fprintf(stderr, "[avcodec][Err] could not open codec\n");</DIV>
<DIV> exit(1);</DIV>
<DIV> }</DIV>
<DIV></DIV>
<DIV></DIV>
<DIV>frame = 0;</DIV>
<DIV></DIV>
<DIV>}</DIV>
<DIV></DIV>
<DIV></DIV>
<DIV>Thank you very much!</DIV>
<DIV>Yinxia</DIV>
<DIV></DIV>
<DIV></DIV>
<DIV>--</DIV>
<DIV>View this message in context: http://libav-users.943685.n4.nabble.com/Decoding-Problem-got-picture-always-return-0-tp4496039p4496039.html</DIV>
<DIV>Sent from the libav-users mailing list archive at Nabble.com.</DIV>
<DIV>_______________________________________________</DIV>
<DIV>Libav-user mailing list</DIV>
<DIV>Libav-user@ffmpeg.org</DIV>
<DIV>http://ffmpeg.org/mailman/listinfo/libav-user</DIV>
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