I have a valid mp4 file which I can open and work with using
"av_open_input_file",
I would like to be able to use the "av_open_input_stream" on the same
file. I have the following code which produces an error code of -1 from
the "av_open_input_stream(...) function.
I would really really like to get this working as it has been
frustrating me for a long time! If someone could at least point me in
the right direction that would be amazing.
Sorry if code posts are not allowed but I could see no other way of
describing the problem.
Thanks,
Mark.
int read_data(void *opaque, uint8_t *buf, int buf_size)
{
// first read from file, until ffmpeg works
// (later try to receive data from network)
FILE * fp = (FILE *) opaque;
if (!fp)
{
return -1;
}
int cnt = fread(buf, sizeof(uint8_t), buf_size, fp);
return cnt;
}
int Reader()
{
char* fileName = "mpeg4test.mp4";
AVFormatContext *pFormatCtx;
int i, videoStream;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame;
AVPacket packet;
int frameFinished;
int buffer_current_pos;
FILE * fp = fopen(fileName, "r");
// Register all formats and codecs
av_register_all();
uint8_t pDataBuffer[32768];
long lSize = 32768;
read_data(fp, pDataBuffer, lSize);
AVProbeData pd;
pd.buf = pDataBuffer;
pd.buf_size = lSize;
pd.filename = "";
AVInputFormat* pAVInputFormat = av_probe_input_format(&pd, 1);
if(!pAVInputFormat)
{
return false;
}
pAVInputFormat->flags |= AVFMT_NOFILE;
ByteIOContext ByteIOCtx;
if(init_put_byte(&ByteIOCtx, pDataBuffer, lSize, 0, fp, read_data,
NULL, NULL) < 0)
{
return false;
}
int err = av_open_input_stream(&pFormatCtx, &ByteIOCtx, "",
pAVInputFormat, NULL);
if(err < 0)
{
etc...etc...
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