使用FFMpeg iOS解码相机流视频帧时出错

Question

我有一个应用程序，其中我正在解码来自ip camera的视频帧，但avcodec_decode_video2(m_pCodecCtx, m_pFrame, &consumed_bytes, &avpkt);中出现的方法avcodec.h生成bad_access，我无法弄清楚出了什么问题。

此应用程序与旧库FFMpeg一起正常运行，但是根据苹果政策，为了发布app支持arm64，所以我更新了我的库以支持arm64，之后发生了这个问题。

以下是截图

虽然bad_access应用程序正在生成以下日志：

[h264 @ 0x1071400] sps_id 12 out of range
[h264 @ 0x1071400] pps_id 417 out of range
[h264 @ 0x1071400] sps_id 3 out of range
[h264 @ 0x1071400] sps_id 32 out of range
[h264 @ 0x1071400] sps_id 6 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 32 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 3 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 32 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 32 out of range
[h264 @ 0x1071400] sps_id 3 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] pps_id 418 out of range
[h264 @ 0x1071400] Partitioned H.264 support is incomplete
[h264 @ 0x1071400] sps_id 6 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 1 out of range
[h264 @ 0x1071400] non-existing PPS 3 referenced
[h264 @ 0x1071400] decode_slice_header error
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] slice type 10 too large at 0 0
[h264 @ 0x1071400] decode_slice_header error
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] non-existing PPS 2 referenced
[h264 @ 0x1071400] decode_slice_header error
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] slice type 29 too large at 0 0
[h264 @ 0x1071400] decode_slice_header error
[h264 @ 0x1071400] sps_id 2 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] sps_id 0 out of range
[h264 @ 0x1071400] slice type 32 too large at 0 0
[h264 @ 0x1071400] decode_slice_header error
[h264 @ 0x1071400] slice type 32 too large at 0 0
[h264 @ 0x1071400] decode_slice_header error
[h264 @ 0x1071400] slice type 32 too large at 0 0
[h264 @ 0x1071400] decode_slice_header error
[h264 @ 0x1071400] slice type 32 too large at 0 0

完整的错误日志： https://drive.google.com/file/d/0B-Nh7ci6wLX0OVlxaXV4aGpJems/view?usp=sharing

崩溃日志： http://crashes.to/s/6765d63b540

注意：如果您还需要其他任何内容，请发表评论。

Answer 1

我解决了我的问题，问题在于折旧方法avcodec_alloc_frame()。

我在构造函数

中使用了以下代码

    m_pCodecCtx = avcodec_alloc_context3(m_pCodec);
    if(m_pCodecCtx == NULL)
    {
        NSLog(@"if(pCodecCtx == NULL)\n");
        return ;
    }  
   [g_Lock lock];
    //¥Úø™codec°£»Áπ˚¥Úø™≥…𶵃ª∞£¨∑÷≈‰AVFrame£     
    if(avcodec_open2(m_pCodecCtx, m_pCodec, NULL) >= 0)     
    {     
        m_pFrame = avcodec_alloc_frame();   /* Allocate video frame   */

    }
    [g_Lock unlock];

然后我最终更新了我的头文件，之后我收到关于方法avcodec_alloc_frame()折旧的警告，所以，我将其更新为av_frame_alloc()并且它完美无缺！