ECLAIR-DSP: dragging the playback progress bar causes a/v out of sync

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Steps to reproduce:
1. Download Big Buck Bunny clip
http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v
2. Convert the clip using the following command:
ffmpeg -i BigBuckBunny_640x360.m4v -vcodec mpeg4 -vb 1500000 -acodec libfaac -ac 2 -ar 16000 -ab 32000 bbb-vga.mp4
3. Put the clip to sdcard.
4. Launch android.
5. Open gallery application.
6. Play the video.
7. Drag the progress bar.

Expected output:
Audio and video streams should be synchronized.

Real output:
Audio and video streams are out of sync: video is behind audio; If dragged the
progress bar, a/v sync gets better, but still noticeable.

```

Original issue reported on code.google.com by `yegor.ye...@gmail.com` on 20 Oct 2010 at 2:19

Reproduce the issue with the Big Buck Bunny conversion command, an SD card, and the Android Gallery application, then compare audio and video timing before and after dragging the progress bar. Done means seeking no longer leaves video behind audio and playback remains synchronized.

Written by the indexing model from the issue text.