[Libav-user] Mp3 play using ffmpeg

Yamusani Vinay yamusanivinay at gmail.com
Thu Oct 31 14:24:56 CET 2013

I tried playing another mp3 file then at the below line.

int res = av_find_stream_info(pFormatCtx);

I got res as -1 so this is unable to find stream info..so please help in
solving this issue..

On Thu, Oct 31, 2013 at 6:21 PM, Robert Schmidt
<rob.f.schmidt86 at gmail.com>wrote:

> On Thu, Oct 31, 2013 at 9:46 AM, Yamusani Vinay <yamusanivinay at gmail.com>
> wrote:
> >
> > the error is while decoding the length obtained  is negative.
> >
> One possibility is that you might be trying to decode a non-audio
> packet.  On line 110, after you've read a packet from the file, you
> check if your decoding context is for audio, which will always be
> true.  What I think you want to do is instead check that the packet
> you retrieved is associated with your audio stream and not some other
> stream in the file.
> Something like
>     if (packet.stream_index == audioStream)
> It's possible this code worked for a .wav file if the file only had a
> single stream containing audio data.
> Hope this helps.
> Rob
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> Libav-user at ffmpeg.org
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