FFmpegImageProxy::avio_read (uint8_t* buffer, int const amount)
{
int const to_do = min(int64_t(amount), _data.size() - _pos);
FFmpegImageProxy::avio_read (uint8_t* buffer, int const amount)
{
int const to_do = min(int64_t(amount), _data.size() - _pos);