diff --git a/pkg/formats/fmp4/init_track.go b/pkg/formats/fmp4/init_track.go
index e5f1cc4..5083d6a 100644
--- a/pkg/formats/fmp4/init_track.go
+++ b/pkg/formats/fmp4/init_track.go
@@ -96,6 +96,10 @@ func (track *InitTrack) marshal(w *mp4Writer) error {
 		height = av1SequenceHeader.Height()
 
 	case *CodecVP9:
+		if codec.Width == 0 {
+			return fmt.Errorf("VP9 parameters not provided")
+		}
+
 		width = codec.Width
 		height = codec.Height
 
@@ -120,16 +124,28 @@ func (track *InitTrack) marshal(w *mp4Writer) error {
 		height = h264SPS.Height()
 
 	case *CodecMPEG4Video:
+		if len(codec.Config) == 0 {
+			return fmt.Errof("MPEG-4 Video config not provided")
+		}
+
 		// TODO: parse config and use real values
 		width = 800
 		height = 600
 
 	case *CodecMPEG1Video:
+		if len(codec.Config) == 0 {
+			return fmt.Errof("MPEG-1/2 Video config not provided")
+		}
+
 		// TODO: parse config and use real values
 		width = 800
 		height = 600
 
 	case *CodecMJPEG:
+		if codec.Width == 0 {
+			return fmt.Errorf("M-JPEG parameters not provided")
+		}
+
 		width = codec.Width
 		height = codec.Height
 	}