[Interest] "Internal data stream error" when trying to play video file

[Nikos Chantziaras]

I now tried examples/multimedia/video/qmlvideo.

When I click the first time, "Internal data stream error." It doesn't play.

If I click again, it plays fine, and continues to play fine on all 
subsequent attempts. But the first try on program start, it always fails :-/

Enabling full gstreamer debug output (setting GST_DEBUG="*:2") gives 
this on the first attempt where it fails:


$ GST_DEBUG="*:2" ./qmlvideo /tmp/video.mpg
Failed to start video surface
0:00:00.830868311  1368      0x2c00280 WARN                  ffmpeg 
/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r3/work/gst-ffmpeg-0.10.13_p201211/ext/ffmpeg/gstffmpegdec.c:2275:gst_ffmpegdec_frame:<ffdec_cinepak0> 
ffdec_cinepak: decoding error (len: -1, have_data: 0)
0:00:00.830939490  1368      0x2bffca0 WARN                avidemux 
/var/tmp/portage/media-libs/gst-plugins-good-0.10.31-r1/work/gst-plugins-good-0.10.31/gst/avi/gstavidemux.c:5212:gst_avi_demux_loop:<avidemux0> 
error: Internal data stream error.
0:00:00.830958617  1368      0x2bffca0 WARN                avidemux 
/var/tmp/portage/media-libs/gst-plugins-good-0.10.31-r1/work/gst-plugins-good-0.10.31/gst/avi/gstavidemux.c:5212:gst_avi_demux_loop:<avidemux0> 
error: streaming stopped, reason not-linked
0:00:00.831172531  1368      0x2c00280 WARN                  ffmpeg 
/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r3/work/gst-ffmpeg-0.10.13_p201211/ext/ffmpeg/gstffmpegdec.c:2275:gst_ffmpegdec_frame:<ffdec_cinepak0> 
ffdec_cinepak: decoding error (len: -1, have_data: 0)
0:00:00.838421437  1368 0x7f170c00b190 WARN           basetransform 
/var/tmp/portage/media-libs/gstreamer-0.10.36-r2/work/gstreamer-0.10.36/libs/gst/base/gstbasetransform.c:1739:gst_base_transform_prepare_output_buffer:<ffmpegcolorspace-vo> 
pad-alloc failed: wrong-state
0:00:00.838439087  1368 0x7f170c00b190 WARN           basetransform 
/var/tmp/portage/media-libs/gstreamer-0.10.36-r2/work/gstreamer-0.10.36/libs/gst/base/gstbasetransform.c:2548:gst_base_transform_handle_buffer:<ffmpegcolorspace-vo> 
could not get buffer from pool: wrong-state
qml: [qmlvideo] VideoItem.onError error 1 errorString Internal data 
stream error.
qml: [qmlvideo] Content.onFatalError
Error: "Internal data stream error."


The output on the subsequent attempts (they all succeed):


0:00:04.737457749  1396 0x7f8b2000acf0 WARN                  ffmpeg 
/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r3/work/gst-ffmpeg-0.10.13_p201211/ext/ffmpeg/gstffmpegdec.c:2275:gst_ffmpegdec_frame:<ffdec_cinepak2> 
ffdec_cinepak: decoding error (len: -1, have_data: 0)
0:00:04.738491738  1396 0x7f8b2000ade0 WARN                     bin 
/var/tmp/portage/media-libs/gstreamer-0.10.36-r2/work/gstreamer-0.10.36/gst/gstbin.c:2395:gst_bin_do_latency_func:<playbin20> 
did not really configure latency of 0:00:00.000000000


Playing it manually with gst-launch-0.10 on the CLI does not give any 
decoding warnings. Just:


$ GST_DEBUG="*:2" gst-launch-0.10 playbin uri=file:///tmp/video.mpg
0:00:00.049918625  1427       0x87fb00 WARN                     bin 
/var/tmp/portage/media-libs/gstreamer-0.10.36-r2/work/gstreamer-0.10.36/gst/gstbin.c:2395:gst_bin_do_latency_func:<playbin0> 
did not really configure latency of 0:00:00.000000000


On 12/02/15 21:09, Harri Pasanen wrote:
> Cool video :)
>
> It plays just fine on my Qt 5.4.x linux installation using QML MediaPlayer.
>
> Just my 2 cents,
>
> Harri
>
> On 12/02/2015 19:00, Nikos Chantziaras wrote:
>> On 12/02/15 19:57, Nikos Chantziaras wrote:
>>> [...]
>>> When trying to play a video file, QMediaPlayer raises an error:
>>>
>>>       Error: "Internal data stream error."
>>>
>>> [,,,]
>>> If I play the file manually with gstreamer:
>>>
>>>       $ gst-launch-0.10 playbin uri=file:///tmp/video.mpg
>>>
>>> it plays just fine.
>> This is the video file:
>>
>>      http://wikisend.com/download/489786/video.mpg
>>
>> (I hope that site works.)
>>
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>