Simplify get_frame_played_at

Author: NicolasHug

src/torchcodec/decoders/_core/VideoDecoder.cpp

@@ -698,24 +698,9 @@ VideoDecoder::FrameOutput VideoDecoder::getFramePlayedAt(double seconds) {
   }
 
   setCursorPtsInSeconds(seconds);
-  AVFrameStream avFrameStream =
-      decodeAVFrame([seconds, this](AVFrame* avFrame) {
-        StreamInfo& streamInfo = streamInfos_[activeStreamIndex_];
-        double frameStartTime = ptsToSeconds(avFrame->pts, streamInfo.timeBase);
-        double frameEndTime = ptsToSeconds(
-            avFrame->pts + getDuration(avFrame), streamInfo.timeBase);
-        if (frameStartTime > seconds) {
-          // FFMPEG seeked past the frame we are looking for even though we
-          // set max_ts to be our needed timestamp in avformat_seek_file()
-          // in maybeSeekToBeforeDesiredPts().
-          // This could be a bug in FFMPEG: https://trac.ffmpeg.org/ticket/11137
-          // In this case we return the very next frame instead of throwing an
-          // exception.
-          // TODO: Maybe log to stderr for Debug builds?
-          return true;
-        }
-        return seconds >= frameStartTime && seconds < frameEndTime;
-      });
+  AVFrameStream avFrameStream = decodeAVFrame([this](AVFrame* avFrame) {
+    return cursor_ < avFrame->pts + getDuration(avFrame);
+  });
 
   // Convert the frame to tensor.
   FrameOutput frameOutput = convertAVFrameToFrameOutput(avFrameStream);