Transcoder: Preserve source track's bitrate by default.
When no bitrate is passed in the transcoder now preserves the
source track's bitrate. If the bitrate is not available as metadata
the transcoder will sample the source track and estimate the bitrate.
Fixes: 160648740
Test: Unit tests.
Change-Id: I4e0284128aaa1116f5b61d908b52582b2ed3d7e4
diff --git a/media/libmediatranscoding/transcoder/VideoTrackTranscoder.cpp b/media/libmediatranscoding/transcoder/VideoTrackTranscoder.cpp
index 65dcad3..e192d2a 100644
--- a/media/libmediatranscoding/transcoder/VideoTrackTranscoder.cpp
+++ b/media/libmediatranscoding/transcoder/VideoTrackTranscoder.cpp
@@ -162,6 +162,8 @@
// Creates and configures the codecs.
media_status_t VideoTrackTranscoder::configureDestinationFormat(
const std::shared_ptr<AMediaFormat>& destinationFormat) {
+ static constexpr int32_t kDefaultBitrateMbps = 10 * 1000 * 1000;
+
media_status_t status = AMEDIA_OK;
if (destinationFormat == nullptr) {
@@ -175,6 +177,18 @@
return AMEDIA_ERROR_INVALID_PARAMETER;
}
+ int32_t bitrate;
+ if (!AMediaFormat_getInt32(encoderFormat, AMEDIAFORMAT_KEY_BIT_RATE, &bitrate)) {
+ status = mMediaSampleReader->getEstimatedBitrateForTrack(mTrackIndex, &bitrate);
+ if (status != AMEDIA_OK) {
+ LOG(ERROR) << "Unable to estimate bitrate. Using default " << kDefaultBitrateMbps;
+ bitrate = kDefaultBitrateMbps;
+ }
+
+ LOG(INFO) << "Configuring bitrate " << bitrate;
+ AMediaFormat_setInt32(encoderFormat, AMEDIAFORMAT_KEY_BIT_RATE, bitrate);
+ }
+
float tmp;
if (!AMediaFormat_getFloat(encoderFormat, AMEDIAFORMAT_KEY_I_FRAME_INTERVAL, &tmp)) {
AMediaFormat_setFloat(encoderFormat, AMEDIAFORMAT_KEY_I_FRAME_INTERVAL,