[Libav-user] avcodec_open2 returns -22
Kevin J. Brooks
kbrooks at r2c-ss.com
Thu Jun 18 16:04:46 CEST 2015
Can someone point me to a reference where I can learn how to set up the
codec parameters? Even if it is only setting up for WMAV2, but I do
need to record both audio and video.
On 6/17/2015 5:53 PM, Kevin J. Brooks wrote:
> 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;
>> 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
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
> Libav-user mailing list
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