flv demux failures on YouTube 240p FLV audio tracks

[Dave Milici]

Hi all--

I've been using gstreamer 0.10 stack with QT 4.8.4 on ARM embedded device, and encounter a problem with demuxer on YouTube 240p FLV audio tracks.

Attached is log session with GST_DEBUG set for flvdemux element. (Snippey below.)

We have to use the smallest size videos YouTube serves up with "low" quality tag (itag = 5). These videos are 426x240 FLV with 22KHz MP3 audio track.

When playing downloaded copies of these FLVs, the audio track is decoded OK with other libav playback methods, or with audio-only gstreamer pipeline.

gstreamer 0.10.36
gst-plugins-base 0.10.36
gst-plugins-good 0.10.31
gst-ffmpeg-0.10.13

Is the flv demuxer component good to go with YouTube FLVs?
Is there an ffmpeg component which needs to be added to pipeline for MP3 decoding?

--DaveM


0:00:01.177995133 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:1129:gst_flv_demux_video_negotiate:<'':video> fps to be used on caps 23.976087 (as a fraction = 3417000/142517)
0:00:01.179577619 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:1156:gst_flv_demux_video_negotiate:<'':video> successfully negotiated caps video/x-flash-video, pixel-aspect-ratio=(fraction)1/1, width=(int)426, height=(int)240, framerate=(fraction)3417000/142517
0:00:01.180605005 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:1257:gst_flv_demux_parse_tag_video:<flvdemux0> created video pad with caps video/x-flash-video, pixel-aspect-ratio=(fraction)1/1, width=(int)426, height=(int)240, framerate=(fraction)3417000/142517
0:00:01.670504592 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:752:gst_flv_demux_push_tags:<flvdemux0> Waiting for audio stream pad to come up before we can push tags
0:00:01.671758356 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:1385:gst_flv_demux_parse_tag_video:<flvdemux0> pushing newsegment from 0:00:00.000000000 to 99:99:99.999999999
0:00:01.674638162 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:735:gst_flv_demux_audio_negotiate:<'':audio> successfully negotiated caps audio/mpeg, mpegversion=(int)1, layer=(int)3, parsed=(boolean)true, rate=(int)22050, channels=(int)2
0:00:01.675454406 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:887:gst_flv_demux_parse_tag_audio:<flvdemux0> created audio pad with caps audio/mpeg, mpegversion=(int)1, layer=(int)3, parsed=(boolean)true, rate=(int)22050, channels=(int)2
shm_open() failed: No such file or directory
0:00:01.903369789 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:910:gst_flv_demux_parse_tag_audio:<flvdemux0> emitting no more pads
0:00:01.904342878 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:762:gst_flv_demux_push_tags:<flvdemux0> pushing tags out taglist, duration=(guint64)142517000000, video-codec=(string)"Sorenson\ Spark\ Video", audio-codec=(string)"MPEG-1\ Layer\ 3\ \(MP3\)";
0:00:01.905969118 20935   0x157888 DEBUG               flvdemux gstflvdemux.c:1018:gst_flv_demux_parse_tag_audio:<flvdemux0> pushing pre-generated newsegment event
0:00:01.909721426 20935   0x1898a0 DEBUG               flvdemux gstflvdemux.c:2994:gst_flv_demux_query:<flvdemux0:audio> duration query, replying 0:02:22.681000000
shm_open() failed: No such file or directory
0:00:01.942318882 20935   0x1898a0 DEBUG               flvdemux gstflvdemux.c:2988:gst_flv_demux_query:<flvdemux0> duration query only supported for time format
0:00:02.118523899 20935   0x157888 WARN                flvdemux gstflvdemux.c:1063:gst_flv_demux_parse_tag_audio:<flvdemux0> failed pushing a 210 bytes audio buffer: not-linked
0:00:02.271207434 20935   0x157888 WARN                flvdemux gstflvdemux.c:1063:gst_flv_demux_parse_tag_audio:<flvdemux0> failed pushing a 210 bytes audio buffer: not-linked
0:00:02.272537957 20935   0x157888 WARN                flvdemux gstflvdemux.c:1063:gst_flv_demux_parse_tag_audio:<flvdemux0> failed pushing a 210 bytes audio buffer: not-linked
0:00:02.406257604 20935   0x157888 WARN                flvdemux gstflvdemux.c:1063:gst_flv_demux_parse_tag_audio:<flvdemux0> failed pushing a 210 bytes audio buffer: not-linked
0:00:02.407601019 20935   0x157888 WARN                flvdemux gstflvdemux.c:1063:gst_flv_demux_parse_tag_audio:<flvdemux0> failed pushing a 210 bytes audio buffer: not-linked
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