Impala Documentation

bool Impala::Core::Stream::Lavc::VideoAccessObject::InitStreams ( ) [inline, private]

Definition at line 685 of file VideoAccessObject.h.

References ILOG_ERROR, ILOG_WARN, mFormatCtx, mSrcAddress, mVideoStream, mVideoStreamIndex, and StreamCount().

00686     {
00687         mVideoStreamIndex = -1;
00688         mVideoStream = 0;
00689         int videoStreamCount = 0;
00690 
00691         // find the first video stream 
00692         for (int i = 0; i < StreamCount(); i++)
00693         {
00694             if (mFormatCtx->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO)
00695             {
00696                 if (++videoStreamCount > 1)
00697                     continue;
00698                     // Note that this obfuscates the fact that more video data 
00699                     // is present which is inappropriate in forensic settings.
00700 
00701                 mVideoStreamIndex = i;
00702                 mVideoStream = mFormatCtx->streams[i];
00703             }
00704         }
00705 
00706         if (videoStreamCount == 0) 
00707         {
00708             ILOG_ERROR("Did not find video stream in: " << mSrcAddress);
00709             return false;
00710         }
00711 
00712         if (videoStreamCount > 1)
00713             ILOG_WARN("Found " << videoStreamCount << " video streams; using " <<
00714                 "just one from: " << mSrcAddress);
00715 
00716         return true;
00717     }

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