Beta version 4.6.8: Fix build with GCC.

Telegram/SourceFiles/media/audio/media_audio_ffmpeg_loader.cpp

@@ -776,9 +776,6 @@ bool FFMpegLoader::open(crl::time positionMs, float64 speed) {
 }
 
 bool FFMpegLoader::openCodecContext() {
-	int res = 0;
-	char err[AV_ERROR_MAX_STRING_SIZE] = { 0 };
-
 	_codecContext = avcodec_alloc_context3(nullptr);
 	if (!_codecContext) {
 		LOG(("Audio Error: "

Telegram/SourceFiles/media/audio/media_audio_loaders.cpp

@@ -396,7 +396,6 @@ Loaders::SetupLoaderResult Loaders::setupLoader(
 	}
 
 	auto SpeedDependentPosition = Mixer::Track::SpeedDependentPosition;
-	auto SpeedIndependentPosition = Mixer::Track::SpeedIndependentPosition;
 	if (!l) {
 		std::unique_ptr<AudioPlayerLoader> *loader = nullptr;
 		switch (audio.type()) {

Telegram/build/docker/centos_env/Dockerfile

@@ -585,6 +585,7 @@ RUN git init ffmpeg \
 		--enable-decoder=wmav2 \
 		--enable-decoder=wmavoice \
 		--enable-encoder=libopus \
+		--enable-filter=atempo \
 		--enable-parser=aac \
 		--enable-parser=aac_latm \
 		--enable-parser=flac \