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Code Issues Releases Wiki Activity

Workaround for ffmpeg 2.6 artifacts.

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This commit is contained in:
Johns
2015-04-22 12:14:15 +02:00
parent a1939eb6cb
commit e0f4a99b99
4 changed files with 47 additions and 3 deletions
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35
codec.c
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@@ -1,7 +1,7 @@
///
/// @file codec.c @brief Codec functions
///
/// Copyright (c) 2009 - 2014 by Johns. All Rights Reserved.
/// Copyright (c) 2009 - 2015 by Johns. All Rights Reserved.
///
/// Contributor(s):
///
@@ -93,6 +93,16 @@
#include "audio.h"
#include "codec.h"
//----------------------------------------------------------------------------
// correct is AV_VERSION_INT(56,35,101) but some gentoo i* think
// they must change it.
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(56,26,100)
/// ffmpeg 2.6 started to show artifacts after channel switch
/// to SDTV channels
#define FFMPEG_WORKAROUND_ARTIFACTS 1
#endif
//----------------------------------------------------------------------------
// Global
//----------------------------------------------------------------------------
@@ -105,6 +115,9 @@
///
static pthread_mutex_t CodecLockMutex;
/// Flag prefer fast xhannel switch
char CodecUsePossibleDefectFrames;
//----------------------------------------------------------------------------
// Video
//----------------------------------------------------------------------------
@@ -126,6 +139,9 @@ struct _video_decoder_
int GetFormatDone; ///< flag get format called!
AVCodec *VideoCodec; ///< video codec
AVCodecContext *VideoCtx; ///< video codec context
#ifdef FFMPEG_WORKAROUND_ARTIFACTS
int FirstKeyFrame; ///< flag first frame
#endif
AVFrame *Frame; ///< decoded video frame
};
@@ -525,6 +541,9 @@ void CodecVideoOpen(VideoDecoder * decoder, const char *name, int codec_id)
}
// reset buggy ffmpeg/libav flag
decoder->GetFormatDone = 0;
#ifdef FFMPEG_WORKAROUND_ARTIFACTS
decoder->FirstKeyFrame = 1;
#endif
}
/**
@@ -611,8 +630,22 @@ void CodecVideoDecode(VideoDecoder * decoder, const AVPacket * avpkt)
}
if (got_frame) { // frame completed
#ifdef FFMPEG_WORKAROUND_ARTIFACTS
if (!CodecUsePossibleDefectFrames && decoder->FirstKeyFrame) {
decoder->FirstKeyFrame++;
if (frame->key_frame) {
Debug((3, "codec: key frame after %d frames\n",
decoder->FirstKeyFrame);
decoder->FirstKeyFrame = 0;
}
} else {
//DisplayPts(video_ctx, frame);
VideoRenderFrame(decoder->HwDecoder, video_ctx, frame);
}
#else
//DisplayPts(video_ctx, frame);
VideoRenderFrame(decoder->HwDecoder, video_ctx, frame);
#endif
} else {
// some frames are needed for references, interlaced frames ...
// could happen with h264 dvb streams, just drop data.