[Libav-user] decoding video frames

[Bob Self]

On Thu, May 10, 2012 at 1:08 PM, Alex Cohn <alexcohn at netvision.net.il> wrote:

> This code implies that the actual compressed packets are of the size
> that fits precisely into INBUF_SIZE. Otherwise, when you reach the end
> of first buffer you got from fread(), you will have a non-complete
> packet. The decoder cannot handle such case. You should put this
> remaining chunk aside and append the data you read from the file so
> that the compressed packets that go to decoder are always complete.
>
> The trick is, you don't know the actual size of the next packet,
> therefore you cannot decide whether to read another piece of data from
> the file, or not. This is why it is preferred to use avformat
> functions to read the file.
>

> BR,
> Alex Cohn
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> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user


That makes sense. I am using the example in the doc/examples
directory. It uses fread(). Can you point me to an example that uses
the avformat functions? I've been trying to find examples, but haven't
had any luck.