[FFmpeg-devel] [Ffmpeg-devel] new grab interface breaks bktr grabing

Nikns Siankin nikns
Thu May 3 21:14:07 CEST 2007

On Sun, Apr 29, 2007 at 05:56:30PM +0300, Nikns Siankin wrote:
>>>>Thanks for this. I have been using ffmpeg for a while
>>>>on Slackware Linux, but just set it up today on
>>>>FreeBSD 6.2. I referred back to your info to get
>>>>grabbing to work. (The command line is different from
>>>>Linux. I might have fucked around for hours trying to
>>>>get it to work without this info.)
>>>>The kernel was rebuilt to remove all unnecessary
>>>>drivers, and bktr built in statically. (The box was an
>>>>old  450MHz PIII with 128M RAM, so it was pared down
>>>>to minimum, just to be sure. The bktr driver
>>>>complained about unable to allocate memory when loaded
>>>>with kldload, but seemed to load ok when loaded at
>>>>boot with  loader.conf. The card was a LW-104 --aka
>>>>Pico2000 ebay special).
>>>>I used SVN-r8618, downloaded today.
>>>>This command worked:
>>>>./ffmpeg -y -s cif -f bktr -i /dev/bktr0 -an  -tvstd
>>>>ntsc test.mpg
>Installed FreeBSD 6.2 box to test bktr ffmpeg grabing under FreeBSD.
>The same effect as in OpenBSD.
>FFmpeg install with old grabbing interface grabs fine.
>Perhaps issue specified by my card:
>  bktr_mem: memory holder loaded
>  bktr0: <BrookTree 878> mem 0xf3002000-0xf3002fff irq 11 at device 10.0 on pci0
>  bktr0: [GIANT-LOCKED]
>  bktr0: Card has no configuration EEPROM. Cannot determine card make.
>  bktr0: IMS TV Turbo, Philips FR1236 NTSC FM tuner.
>Maybe in old interface there where some workaround for this card...

Got bktr capturing to work!
In command line 'tvstd' MUST be specified
before '-f bktr' or else it gets ignored.

Dumps VHS stream into raw data for later processing:
BKTR_DEV=0 ffmpeg -y -tvstd pal -r 25 -s 768x576 -deinterlace -isync \
-f bktr -i /dev/bktr0 -f audio_device -i /dev/audio \
-acodec pcm_s16le -s 768x576 -vcodec rawvideo /data/raw.avi

>>Ramiro Polla
>>[1] http://article.gmane.org/gmane.comp.video.ffmpeg.devel/47852
>>ffmpeg-devel mailing list
>>ffmpeg-devel at mplayerhq.hu
>ffmpeg-devel mailing list
>ffmpeg-devel at mplayerhq.hu

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