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Transcode, limit output birate to the media bitrate (no need to upscale)

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This commit is contained in:
emeric
2014-09-01 14:59:07 +02:00
parent 07624995e7
commit c8837d6d68
10 changed files with 84 additions and 30 deletions
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transcode/Parameters.cpp
+50 -16
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@@ -1,3 +1,6 @@
#include "logger/Logger.hpp"
#include "av/InputFormatContext.hpp"
#include "Parameters.hpp"
@@ -13,30 +16,61 @@ getMimeType(Format format)
}
Parameters::Parameters(const InputMediaFile& inputMediaFile,
const Format& outputFormat,
std::size_t audioBitrate)
const Format& outputFormat)
:
_mediaFile(inputMediaFile),
_outputFormat(outputFormat),
_outputAudioBitrate(audioBitrate),
_outputVideoBitrate(0)
_outputFormat(outputFormat)
{
// By default, select the best stream indexes
_inputStreams = _mediaFile.getBestStreams();
// setBitrate(Stream::Audio, 0);
// setBitrate(Stream::Video, 0);
}
Parameters::Parameters(const InputMediaFile& inputMediaFile,
const Format& outputFormat,
std::size_t audioBitrate,
std::size_t videoBitrate)
:
_mediaFile(inputMediaFile),
_outputFormat(outputFormat),
_outputAudioBitrate(audioBitrate),
_outputVideoBitrate(videoBitrate)
std::size_t
Parameters::setBitrate(Stream::Type type, std::size_t bitrate)
{
// By default, select the best stream indexes
_inputStreams = _mediaFile.getBestStreams();
// Limit the output bitrate to the input bitrate
if (_inputStreams.find(type) != _inputStreams.end())
{
const Transcode::Stream& stream = _mediaFile.getStream( _inputStreams[type] );
LMS_LOG(MOD_TRANSCODE, SEV_DEBUG) << "Stream bitrate = " << stream.getBitrate();
if (!bitrate || bitrate > stream.getBitrate())
{
LMS_LOG(MOD_TRANSCODE, SEV_INFO) << "Setting bitrate for stream idx " << _inputStreams[type] << " to input bitrate (" << stream.getBitrate() << ")";
_outputBitrate[type] = stream.getBitrate();
}
else
{
LMS_LOG(MOD_TRANSCODE, SEV_DEBUG) << "Setting bitrate for stream idx " << _inputStreams[type] << " to " << bitrate;
_outputBitrate[type] = bitrate;
}
return _outputBitrate[type];
}
else
{
LMS_LOG(MOD_TRANSCODE, SEV_DEBUG) << "Cannot find stream type " << type;
return 0;
}
}
std::size_t
Parameters::getOutputBitrate(Stream::Type type) const
{
std::map<Stream::Type, std::size_t>::const_iterator it = _outputBitrate.find(type);
if (it != _inputStreams.end())
{
return it->second;
}
else
{
LMS_LOG(MOD_TRANSCODE, SEV_DEBUG) << "output bitrate not set for type " << type;
return 0;
}
}
} // namespace Transcode