[Libav-user] avformat_open_input error with custom IO

[Mohamed Moanis]

I am trying to implement a custom IO read, where I have some jpeg frames coming as byte array and I have to decode them for later processing.For now my function just read the first two successive frames, then the call to avformat_open_input return -1094995529

uint8_t* buffer = NULL, * avioCxt_buffer = NULL;		buffer_data bd;		int ret = 0;
		bd.ptr = (uint8_t *) pJPEGFrame;		bd.size = len;
		// allocate the context data structure		if ( (*outputFormatCxt = avformat_alloc_context() ) == NULL)		{			fprintf(stderr, "convert_JPEG_Frame_TO_AVFrame @line(%d) - failed to allocate memory for context", __LINE__);			return -1;		}
		if ( (avioCxt_buffer = (uint8_t *) av_malloc(len)) == NULL)		{			fprintf(stderr, "convert_JPEG_Frame_TO_AVFrame @line(%d) - failed to allocate memory", __LINE__);			avformat_close_input(outputFormatCxt);			return -1;		}
		if ( (*pAvIOCxt = avio_alloc_context(avioCxt_buffer, len, 0, &bd, read_packet, NULL, NULL)) == NULL)		{			fprintf(stderr, "convert_JPEG_Frame_TO_AVFrame @line(%d) - failed to allocate memory", __LINE__);			return -1;		}
		(*outputFormatCxt)->pb = *pAvIOCxt;		if ( (ret = avformat_open_input(outputFormatCxt, NULL, NULL, NULL)) < 0)		{			fprintf(stderr, "convert_JPEG_Frame_TO_AVFrame @line(%d) - failed to allocate memory", __LINE__);			return -1;		}
I am following the avio_read example using the same read callback function for the avio context.
Thanks in advance. 		 	   		  
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