プレイ中にシークするために私がこれまでに思いついたものは次のとおりです。
case GDK_Up:
{
gint64 pos_ns, dur_ns, seek_ns;
GstFormat format;
format = GST_FORMAT_TIME;
gst_element_query_duration(pipeline,&format,&dur_ns);
gst_element_query_position(pipeline,&format,&pos_ns);
g_print ("Time: %" GST_TIME_FORMAT " / %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (pos_ns), GST_TIME_ARGS (dur_ns));
seek_ns = pos_ns + 60*GST_SECOND;
if (!gst_element_seek (pipeline, 1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT,
GST_SEEK_TYPE_SET, seek_ns,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
{
g_print ("Seek failed!\n");
}
}
break;
ここに私のパイプラインがあります:
pipeline = gst_parse_launch("filesrc location=filename.mpg ! decodebin name=decoder decoder. ! queue ! audioconvert ! alsasink decoder. ! deinterlace ! ffmpegcolorspace ! glimagesink",&error);
最初のシークの実行には約 3 秒かかり、5 回目または 6 回目のシークでは、新しい位置から再生を開始するのに 15 ～ 20 秒かかります。私は何か間違ったことをしているに違いないことを知っていますが、ドキュメントからそれが何であるかを理解できません。
それは私がパイプラインを構築した方法ですか？ここでいくつかの近道をとったことに気づきました。
メディアファイルの種類ですか？(mpeg2ts) メディアファイルの長さですか? （4時間）
ドキュメントには次のように記載されています。
アプリケーションはパイプラインでシークを発行し、シーク呼び出しが返された直後に新しいメディアが再生されます。
では、シーク呼び出しが戻るまでに時間がかかるのはなぜでしょうか?
どんな助けでも大歓迎です。
アップデート：
デバッグ レベル 2 のデバッグ ログは次のとおりです。
(fullscreen02:4554): GLib-GObject-WARNING **: g_object_set_property: property `device-name' of object class `GstAlsaSink' is not writable
0:00:01.137170699 4554 0x9d9500 WARN mpegtsdemux gstmpegtsdemux.c:754:gst_mpegts_demux_fill_stream: AC3 stream type found but no corresponding descriptor to differentiate between AC3 and EAC3. Assuming plain AC3.
0:00:01.179042694 4554 0x9d9500 WARN mpegtsdemux gstmpegtsdemux.c:754:gst_mpegts_demux_fill_stream: AC3 stream type found but no corresponding descriptor to differentiate between AC3 and EAC3. Assuming plain AC3.
0:00:01.188213891 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:01.188464979 4554 0x7ff9d80270e0 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
No accelerated IMDCT transform found
0:00:01.211118745 4554 0x7ff9d8023c40 WARN alsa gstalsa.c:124:gst_alsa_detect_formats:<alsasink0> skipping non-int format
No accelerated IMDCT transform found
0:00:01.237512648 4554 0x7ff9d8023c40 WARN audioconvert gstaudioconvert.c:832:gst_audio_convert_fixate_channels:<audioconvert0> downstream caps contain no channel layout
0:00:01.239176189 4554 0x9dabd0 WARN audioconvert gstaudioconvert.c:832:gst_audio_convert_fixate_channels:<audioconvert0> downstream caps contain no channel layout
0:00:01.273765960 4554 0x7ff9d8023c40 WARN audioconvert gstaudioconvert.c:832:gst_audio_convert_fixate_channels:<audioconvert0> downstream caps contain no channel layout
Got prepare-xwindow-id msg
0:00:01.326878070 4554 0x6068b0 WARN default xoverlay.c:354:gst_x_overlay_set_xwindow_id:<glimagesink0> Using deprecated gst_x_overlay_set_xwindow_id()
0:00:01.326931302 4554 0x6068b0 WARN default xoverlay.c:390:gst_x_overlay_set_window_handle:<glimagesink0> Calling deprecated set_xwindow_id() method
0:00:01.337897164 4554 0x7ff9cc002cd0 WARN bin gstbin.c:2380:gst_bin_do_latency_func:<pipeline0> did not really configure latency of 0:00:00.000000000
0:00:02.042181425 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:03.016673305 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:04.489319920 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:05.961069736 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
Counter: 0:00:05.930250000 / 3:37:14.178723991 (this is when a 60 sec seek forward was initiated)
0:00:07.300999850 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:07.317269896 4554 0x7ff9cc005cd0 WARN bin gstbin.c:2380:gst_bin_do_latency_func:<pipeline0> did not really configure latency of 0:00:00.000000000
0:00:07.641986233 4554 0x9d9500 WARN decodebin gstdecodebin.c:1485:queue_filled_cb:<decoder> Queue is bigger than 20Mbytes, something else is going wrong
0:00:11.059481122 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:11.474393831 4554 0x9d9500 WARN decodebin gstdecodebin.c:1485:queue_filled_cb:<decoder> Queue is bigger than 20Mbytes, something else is going wrong
previous line repeated 55 times
0:00:12.532097973 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:12.538414925 4554 0x9d9500 WARN decodebin gstdecodebin.c:1485:queue_filled_cb:<decoder> Queue is bigger than 20Mbytes, something else is going wrong
previous line repeated 26 times
Counter: 0:02:05.745916667 / 3:37:14.178723991 (this is when a 60 sec seek forward was initiated)
0:00:13.113363951 4554 0x7ff9cc002c80 WARN bin gstbin.c:2380:gst_bin_do_latency_func:<pipeline0> did not really configure latency of 0:00:00.000000000
0:00:13.116343604 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:13.472504323 4554 0x9d9500 WARN decodebin gstdecodebin.c:1485:queue_filled_cb:<decoder> Queue is bigger than 20Mbytes, something else is going wrong
previous line repeated 9 times
0:00:25.545042104 4554 0x7ff9d8023c40 WARN mpegtsdemux gstmpegtsdemux.c:2865:gst_mpegts_demux_src_pad_query:<mpegtsdemux0> unsupported query format or no bitrate yet to approximate duration from bytes
0:00:25.580215323 4554 0x9d9500 WARN decodebin gstdecodebin.c:1485:queue_filled_cb:<decoder> Queue is bigger than 20Mbytes, something else is going wrong
previous line repeated 43 times
現在、これらの警告のいくつかを調査中です。