[Libav-user] avcodec_open2 returns -22

[Kevin J. Brooks]

I changed the Audio codec to WMAV2, and left the rest of the AudioCodec 
settings the same Now the program crashes at this line in the QtMel code:

int outSize = avcodec_encode_audio(m_audioStream->codec, 
m_audioOutputBuffer, m_audioOutputBufferSize, (short *)samples.data());

In debug the error staates "Stopped in thread 2 by:Exception at 
0x66364c62, cod:0xc0000005: write access violation at:0x1, flags=0x0 
(first chance).

I suspect I don't have the audio settings set write, but I am not sure 
how to set them for WMAV2.



On 6/17/2015 4:30 PM, Kevin J. Brooks wrote:
> I am setting the AudioCodec to MP3,  I am using the pre-built 
> libraries the code I have the causes the issue is from the code for 
> the QtMEL library.  What I am posting here is the Audio Codec setup 
> for the QtMel object.  I hope it helps.
>
> BTW I am using H264 for the Video Codec.  If I record video only, it 
> does work, it is only if I try to add sound that it fails.
>
> CR2CAudioFormat format;
>      format.setChannelCount(2);
>      format.setSampleRate(44100);
>      format.setFormat(CR2CAudioFormat::SignedInt16);
>
> I really don't have a preference for the codec, I just need to know 
> how to set it up properly. I am totally new at recording video and audio.
>
> On 6/17/2015 1:08 AM, Taha Ansari wrote:
>> On Wed, Jun 17, 2015 at 2:17 AM, Gonzalo Garramuno 
>> <ggarra13 at gmail.com <mailto:ggarra13 at gmail.com>> wrote:
>>
>>     On 16/06/15 09:06, Kevin J. Brooks wrote:
>>
>>         Yes I am.  For more information, I am developing on Windoze 7.
>>
>>     avcodec_open2 can fail if you lack the library for the codec you
>>     want to decode or encode.  For example, libx264.  The libraries
>>     in ffmpeg.zeranoe.com <http://ffmpeg.zeranoe.com> contain all
>>     codecs, but they are GPL only.  You should try them first and see
>>     if the problem goes away.  If it does, you know you have to
>>     compile ffmpeg with different flags.
>>
>>
>> Since he mentions Windows 7, I assume he is using pre-built packages 
>> from zeranoe site (as you mention). These builds contain proprietary 
>> codec(s) like x264 (non GPL).
>>
>> @Kevin: maybe you have some bare minimum code with you that can 
>> produce this error, which people can have a look?
>>
>>
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://ffmpeg.org/pipermail/libav-user/attachments/20150617/d7657031/attachment.html>