Fix FLV AVCVIDEOPACKET -> compositionTimeMs Type from UI 24 to SI 24

library/core/src/main/java/com/google/android/exoplayer2/extractor/flv/VideoTagPayloadReader.java

@@ -80,6 +80,9 @@ import com.google.android.exoplayer2.video.AvcConfig;
   protected void parsePayload(ParsableByteArray data, long timeUs) throws ParserException {
   protected void parsePayload(ParsableByteArray data, long timeUs) throws ParserException {
     int packetType = data.readUnsignedByte();
     int packetType = data.readUnsignedByte();
     int compositionTimeMs = data.readUnsignedInt24();
     int compositionTimeMs = data.readUnsignedInt24();
+    // compositionTimeMs is signed int 24, change unsigned int 24 to signed int 24
+    compositionTimeMs = (compositionTimeMs & 0x800000) >> 23 == 1 ? (compositionTimeMs & 0xff000000) : compositionTimeMs;
+
     timeUs += compositionTimeMs * 1000L;
     timeUs += compositionTimeMs * 1000L;
     // Parse avc sequence header in case this was not done before.
     // Parse avc sequence header in case this was not done before.
     if (packetType == AVC_PACKET_TYPE_SEQUENCE_HEADER && !hasOutputFormat) {
     if (packetType == AVC_PACKET_TYPE_SEQUENCE_HEADER && !hasOutputFormat) {