https://www.bravotouring.com/~yano/archives/2017/01/18/ Recent content in 2017/01/18 on Yano's digital garage Hugo en-us Wed, 18 Jan 2017 23:46:45 +0900 https://www.bravotouring.com/~yano/diary/it/20170118_gstreamer.htm Wed, 18 Jan 2017 23:46:45 +0900 https://www.bravotouring.com/~yano/diary/it/20170118_gstreamer.htm <p><a href="https://www.bravotouring.com/~yano/diary/it/20170112_vaapi.htm">宿題</a>を残したQSVハードウェアエンコード環境。</p> <p><a href="http://www.gearsongallium.com/?p=3135">Intel VAAPI h264 encoding: gstreamer vs ffmpeg\avconv</a>などによるとVAAPI対応の選択肢としてGStreamerもあるようなので、試してみた。 <blockquote class="Log"> yano@haswell:~/gst-test$ sudo apt-get install gstreamer1.0-vaapi*<br/> yano@haswell:~/gst-test$ gst-inspect-1.0 vaapi<br/> Plugin Details:<br/> Name vaapi<br/> Description VA-API based elements<br/> Filename /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so<br/> Version 0.5.7<br/> License LGPL<br/> Source module gstreamer-vaapi<br/> Binary package gstreamer-vaapi<br/> Origin URL gwenole.beauchesne@intel.com<br/> <br/> vaapidecode: VA-API decoder<br/> vaapipostproc: VA-API video postprocessing<br/> vaapisink: VA-API sink<br/> <br/> 3 features:<br/> +-- 3 elements<br/><br/> yano@haswell:~/gst-test$ </blockquote> との事。<a href="https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-vaapi-plugins/html/">GStreamer VA-API Plugins 1.0 Plugins Reference Manual</a>を見る限り「VA-API based H.264 video encoder」がありそうなのだが、どうやらubuntu 14.04の公式パッケージはデコーダ未対応の旧版な雰囲気だ。</p> <p>というわけで、必然的に最新版をソースコードからbuildする方向にハンドルを切るわけだが、その前にGstreamerの独特な作法に馴染むべく、取り敢えずx264で試行錯誤してmp4のファイル出力にトライ。 <blockquote class="Log"> yano@haswell:~/gst-test$ ffmpeg -i ~/20161210_2313_28_GRhd.ts -map 0:0 -map 0:1 \<br/> -vcodec copy -acodec copy ./input.ts<br/> yano@haswell:~/gst-test$ gst-launch-1.0 \<br/> filesrc location=./input.ts ! progressreport ! tsdemux name=demuxer demuxer. ! queue ! \<br/> aacparse ! avdec_aac ! audioresample ! audioconvert dithering=0 ! voaacenc bitrate=25800 ! mux. \<br/> mp4mux name=mux ! filesink location=./gst-x264-`date +%Y%m%d_%H%M`.mp4 demuxer. ! queue ! mpegvideoparse ! mpeg2dec ! \<br/> videoconvert ! x264enc pass=quant ! video/x-h264,stream-format=byte-stream,profile=high ! h264parse ! mux.<br/> Got EOS from element "pipeline0".<br/> Setting pipeline to PAUSED ...<br/> Pipeline is PREROLLING ...<br/> Redistribute latency...<br/> Redistribute latency...<br/> Pipeline is PREROLLED ...<br/> Setting pipeline to PLAYING ...<br/> New clock: GstSystemClock<br/> progressreport0 (00:00:05): 4869200 / 250449088 bytes ( 1.9 %)<br/> progressreport0 (00:00:10): 8648000 / 250449088 bytes ( 3.5 %)<br/> ～中略～<br/> progressreport0 (00:04:15): 241937200 / 250449088 bytes (96.6 %)<br/> progressreport0 (00:04:20): 246054400 / 250449088 bytes (98.2 %)<br/> Execution ended after 0:04:27.257661620<br/> Setting pipeline to PAUSED ...<br/> Setting pipeline to READY ...<br/> Setting pipeline to NULL ...<br/> Freeing pipeline ...<br/> yano@haswell:~/gst-test$ <br/> </blockquote> ちなみに生のTSをそのまま喰わせると<blockquote class="Log">ERROR: from element /GstPipeline:pipeline0/GstTSDemux:demuxer: Internal data stream error.</blockquote>と言われるので、ffmpegでVideo/Audio Streamをそれぞれ1つずつ分離しているのだが、変換元が「20161215_0012_28_GRhd.ts」だと2段目の"Redistribute latency..."が出ずにダンマリになってしまうので、まだちょっと怪しい。</p>