void loadAsset(AVAsset asset, string[] assetKeysToLoad, DispatchGroup dispatchGroup)
{
dispatchGroup.Enter();
asset.LoadValuesAsynchronously(assetKeysToLoad, () => {
foreach (var key in assetKeysToLoad)
{
NSError error;
if (asset.StatusOfValue(key, out error) == AVKeyValueStatus.Failed)
{
Console.Error.WriteLine("Key value loading failed for key" + key + " with error: " + error.ToString());
dispatchGroup.Leave();
}
}
if (!asset.Composable)
{
Console.Error.WriteLine("Asset is not composable");
dispatchGroup.Leave();
}
Clips.Add(asset);
ClipTimeRanges.Add(NSValue.FromCMTimeRange(new CMTimeRange()
{
Start = CMTime.FromSeconds(0, 1),
Duration = CMTime.FromSeconds(5, 1)
}));
dispatchGroup.Leave();
});
}
private void LoadAsset(AVAsset asset, string[] assetKeysToLoad, DispatchGroup dispatchGroup)
{
dispatchGroup.Enter();
asset.LoadValuesAsynchronously(assetKeysToLoad, () =>
{
// First test whether the values of each of the keys we need have been successfully loaded.
foreach (var key in assetKeysToLoad)
{
if (asset.StatusOfValue(key, out NSError error) == AVKeyValueStatus.Failed)
{
Console.WriteLine($"Key value loading failed for key:{key} with error: {error?.LocalizedDescription ?? ""}");
goto bail;
}
}
if (!asset.Composable)
{
Console.WriteLine("Asset is not composable");
goto bail;
}
this.clips.Add(asset);
// This code assumes that both assets are atleast 5 seconds long.
var value = NSValue.FromCMTimeRange(new CMTimeRange {
Start = CMTime.FromSeconds(0, 1), Duration = CMTime.FromSeconds(5, 1)
});
this.clipTimeRanges.Add(value);
bail:
dispatchGroup.Leave();
});
}
