/usr/lib/arm-linux-gnueabihf/thumbnailer/vs-thumb:5:g_malloc0_n:gst_amc_codec_get_input_buffers:gst_amc_video_dec_configure_self:gst_amc_video_dec_set_format:gst_video_decoder_setcaps

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding thumbnailer. This problem was most recently seen with version 1.1+14.10.20140811-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/43215b871296dec498de63922819ba2129dcde46 contains more details.

TEST CASE:
1. Launch the camera-app
1. Switch to video mode and record a video
2. Open the gallery app
3. Wait until all thumbnails are generated

ACTUAL RESULT
Thumbnails are generated but the thumbnailer crashes

[Jussi Pakkanen (jpakkane)]

The backtrace shows that the crash happens in GStreamer's video decoding pipeline. This is a bug in GStreamer, not thumbnailer.

Furthermore this bug is not really fixable unless someone provides a test file that invokes the crash.

[Jussi Pakkanen (jpakkane)]

On a closer look the crash happens when trying to allocate 8 bytes with glib, which makes this most likely a duplicate of bug 1346821.

[Jean-Baptiste Lallement (jibel)]

I tried with the version of vs-thumb in attachment and there are 2 cases:
When executed from the gallery, vs-thumb generates the following messages in gallery-app.log
===
(vs-thumb:9491): GLib-ERROR **: /build/buildd/glib2.0-2.41.1/./glib/gmem.c:359: overflow allocating 4294967274*8 bytes
Thumbnail generator failed: Unknown error when trying to extract video screenshot, return value was �.
===

When executed directly on the videos in ~/Videos/camera it doesn't fail excepted for the shortest video (~1s) where it says:
===
$ /usr/lib/arm-linux-gnueabihf/thumbnailer/vs-thumb video20140814_0002.mp4 temp.jpg
video20140814_0002.mp4
[Info] Flush buffer h264_dec_decode !
[Info] Flush buffer h264_dec_decode !
[Info] Flush buffer h264_dec_decode !
Error creating thumbnail: Could not create sample. Unsupported or invalid file type?
===

[Jean-Baptiste Lallement (jibel)]

These videos plays correctly on a PC but not when copied to another device (mako)

On a PC if I run vs-thumb it hangs with:
Problem prerolling, trying to continue anyway.
Media backend does not implement query_duration, using fallback time.

On a mako vs-thumb doesn't crash but the thumbnail is not generated.

[Jean-Baptiste Lallement (jibel)]

Fixed and verified on krillin 14.09-proposed #44

[Jim Hodapp (jhodapp)]

You are sure that this is fixed as to my knowledge, nobody submitted any bug fix for this specifically.

[Jean-Baptiste Lallement (jibel)]

I'm surprised too and didn't find any related fix but yes, I'm sure. I tried to reproduce this issue several times and it's working fine now. It might have been fixed by an update of apparmor rules?