void FormatContext::openCustomIOOutput(CustomIO *io, size_t internalBufferSize, OptionalErrorCode ec)
{
if (isOpened())
{
throws_if(ec, Errors::FormatAlreadyOpened);
return;
}
if (m_raw)
{
OutputFormat format = outputFormat();
if (format.isNull())
{
fflog(AV_LOG_ERROR, "You must set output format for use with custom IO\n");
throws_if(ec, Errors::FormatNullOutputFormat);
return;
}
}
openCustomIO(io, internalBufferSize, true, ec);
}
void FormatContext::openOutput(const string &uri, OutputFormat format, AVDictionary **options, OptionalErrorCode ec)
{
clear_if(ec);
if (!m_raw)
{
throws_if(ec, Errors::Unallocated);
return;
}
if (isOpened())
{
throws_if(ec, Errors::FormatAlreadyOpened);
return;
}
if (format.isNull())
format = outputFormat();
else
setFormat(format);
if (format.isNull())
{
// Guess format
format = guessOutputFormat(string(), uri);
if (format.isNull())
{
fflog(AV_LOG_ERROR, "Can't guess output format");
throws_if(ec, Errors::FormatNullOutputFormat);
return;
}
setFormat(format);
}
// Fix stream flags
#if !USE_CODECPAR
FF_DISABLE_DEPRECATION_WARNINGS
for (size_t i = 0; i < streamsCount(); ++i) {
auto st = stream(i);
if (st.raw()->codec) {
if (outputFormat().isFlags(AVFMT_GLOBALHEADER)) {
st.raw()->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
}
}
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
resetSocketAccess();
if (!(format.flags() & AVFMT_NOFILE))
{
int sts = avio_open2(&m_raw->pb, uri.c_str(), AVIO_FLAG_WRITE, nullptr, options);
if (sts < 0)
{
throws_if(ec, sts, ffmpeg_category());
return;
}
}
m_uri = uri;
m_isOpened = true;
}