Audio 录制音频：gstreamer中的libav编码器/解码器

我想重新编码音频文件的音频流。以下gstreamer管道工作正常：

gst-launch-1.0 filesrc location=input.flac ! decodebin ! audioconvert ! \
               sbcenc ! sbcdec ! autoaudiosink

但是，当我将编码器/解码器切换到libav aptx时，出现以下错误：

gst-launch-1.0 filesrc location=input.flac ! decodebin ! audioconvert ! \
               avenc_aptx ! avdec_aptx ! autoaudiosink

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Redistribute latency...
WARNING: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0: Delayed linking failed.
Additional debug info:
../gstreamer/gst/parse/grammar.y(506): gst_parse_no_more_pads (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0:
failed delayed linking some pad of GstDecodeBin named decodebin0 to some pad of GstAudioConvert named audioconvert0
ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstFlacParse:flacparse0: Internal data stream error.
Additional debug info:
../gstreamer/libs/gst/base/gstbaseparse.c(3634): gst_base_parse_loop (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstFlacParse:flacparse0:
streaming stopped, reason not-linked (-1)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

我得到以下错误：

gst-launch-1.0 filesrc location=input.flac ! decodebin ! audioconvert ! \
               avenc_aptx ! avdec_aptx ! autoaudiosink

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Redistribute latency...
WARNING: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0: Delayed linking failed.
Additional debug info:
../gstreamer/gst/parse/grammar.y(506): gst_parse_no_more_pads (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0:
failed delayed linking some pad of GstDecodeBin named decodebin0 to some pad of GstAudioConvert named audioconvert0
ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstFlacParse:flacparse0: Internal data stream error.
Additional debug info:
../gstreamer/libs/gst/base/gstbaseparse.c(3634): gst_base_parse_loop (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstFlacParse:flacparse0:
streaming stopped, reason not-linked (-1)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

我在管道中遗漏了什么？如何使用FFMPEG/libav编解码器

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我是gstreamer新手，希望使用cli工具将音频流重新编码到一组不同的编解码器中。libav似乎拥有所需的所有编解码器

你的管道一切正常，但是

执行

gst-launch-1.0--version

检查您的Gstreamer的版本

使用Gstreamer版本1.15.90，我检查了

avenc_aptx

和

gst-inspect-1.0 avenc_aptx

，发现该编码器的SRC（源）功能“未知”。Gstreamer元素需要共享功能才能相互连接

另一方面，的文档明确指出存在SRC功能（音频/aptx…）

同样的情况也适用于解码器avdec_aptx，其中接收器功能“未知”，但文档中明确提到了接收器功能

因此，您的问题很可能是由于您的Gstreamer版本部分（不完全）实现了aptx编码器和解码器

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尝试将Gstreamer升级到最新版本，再次检查aptx编码器/解码器，如果可以看到SRC/SINK功能，则重新运行管道。

aptx肯定不是AAC。你完全正确。这是个打字错误，我马上就把它修好了。感谢您指出这一点。我使用Gstreamer版本1.16.2运行Arch Linux。遗憾的是，编解码器还没有完全实现。同时，我发现了一个使用ffmpeg的解决方案。然而，从长远来看，使用gstreamer来实现这一点是很好的。。。