--- a/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.cpp
@@ -123,16 +123,22 @@ FFmpegAudioDecoder<LIBAV_VER>::DecodePac
     if (bytesConsumed < 0) {
       NS_WARNING("FFmpeg audio decoder error.");
       mCallback->Error();
       return;
     }
 
     if (decoded) {
       uint32_t numChannels = mCodecContext->channels;
+      AudioConfig::ChannelLayout layout(numChannels);
+      if (!layout.IsValid()) {
+        mCallback->Error();
+        return;
+      }
+
       uint32_t samplingRate = mCodecContext->sample_rate;
 
       AlignedAudioBuffer audio =
         CopyAndPackAudio(mFrame, numChannels, mFrame->nb_samples);
 
       media::TimeUnit duration =
         FramesToTimeUnit(mFrame->nb_samples, samplingRate);
       if (!audio || !duration.IsValid()) {