The bundled ffmpeg in Chromium is newer than the one in Guix.  Patch so
we can build with the new and old ffmpeg versions.

Taken from Gentoo:
https://gitweb.gentoo.org/repo/gentoo.git/tree/www-client/chromium/files/chromium-93-fix-build-with-system-ffmpeg.patch

diff --git a/media/filters/audio_decoder_unittest.cc b/media/filters/audio_decoder_unittest.cc
--- a/media/filters/audio_decoder_unittest.cc
+++ b/media/filters/audio_decoder_unittest.cc
@@ -109,7 +109,11 @@ void SetDiscardPadding(AVPacket* packet,
   }
 
   // If the timestamp is positive, try to use FFmpeg's discard data.
+#if LIBAVUTIL_VERSION_MAJOR < 57
+  int skip_samples_size = 0;
+#else
   size_t skip_samples_size = 0;
+#endif
   const uint32_t* skip_samples_ptr =
       reinterpret_cast<const uint32_t*>(av_packet_get_side_data(
           packet, AV_PKT_DATA_SKIP_SAMPLES, &skip_samples_size));
diff --git a/media/filters/ffmpeg_demuxer.cc b/media/filters/ffmpeg_demuxer.cc
--- a/media/filters/ffmpeg_demuxer.cc
+++ b/media/filters/ffmpeg_demuxer.cc
@@ -427,11 +427,19 @@ void FFmpegDemuxerStream::EnqueuePacket(
   scoped_refptr<DecoderBuffer> buffer;
 
   if (type() == DemuxerStream::TEXT) {
+#if LIBAVUTIL_VERSION_MAJOR < 57
+    int id_size = 0;
+#else
     size_t id_size = 0;
+#endif
     uint8_t* id_data = av_packet_get_side_data(
         packet.get(), AV_PKT_DATA_WEBVTT_IDENTIFIER, &id_size);
 
+#if LIBAVUTIL_VERSION_MAJOR < 57
+    int settings_size = 0;
+#else
     size_t settings_size = 0;
+#endif
     uint8_t* settings_data = av_packet_get_side_data(
         packet.get(), AV_PKT_DATA_WEBVTT_SETTINGS, &settings_size);
 
@@ -443,7 +451,11 @@ void FFmpegDemuxerStream::EnqueuePacket(
     buffer = DecoderBuffer::CopyFrom(packet->data, packet->size,
                                      side_data.data(), side_data.size());
   } else {
+#if LIBAVUTIL_VERSION_MAJOR < 57
+    int side_data_size = 0;
+#else
     size_t side_data_size = 0;
+#endif
     uint8_t* side_data = av_packet_get_side_data(
         packet.get(), AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, &side_data_size);
 
@@ -504,7 +516,11 @@ void FFmpegDemuxerStream::EnqueuePacket(
                                        packet->size - data_offset);
     }
 
+#if LIBAVUTIL_VERSION_MAJOR < 57
+    int skip_samples_size = 0;
+#else
     size_t skip_samples_size = 0;
+#endif
     const uint32_t* skip_samples_ptr =
         reinterpret_cast<const uint32_t*>(av_packet_get_side_data(
             packet.get(), AV_PKT_DATA_SKIP_SAMPLES, &skip_samples_size));
tr>
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<tr><td><span title='2021-12-22 10:53:19 +0100'>2021-12-22</span></td><td><a href='/guix/commit/tests/channels.scm?id=9ebc9ca070a21ba0aeb3f61202a8071bb250ccc8'>tests: Move keys into ./tests/keys/ and add a third ed25519 key.</a><span class='msg-avail'>...</span></td><td>Attila Lendvai</td></tr>
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