#292 closed defect (fixed)
ffplay -f video4linux2 regression
Reported by: | Carl Eugen Hoyos | Owned by: | |
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Priority: | normal | Component: | avdevice |
Version: | git-master | Keywords: | ffplay regression v4l2 |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | yes | |
Analyzed by developer: | yes |
Description
ffplay -f video4linux2 /dev/video0 does not work any more since r25159, 70f77361d8c339d516e3c4d1c4ab2bf9096d7cc6:
Author: José Miguel Gonçalves <jose.goncalves@inov.pt>
Date: Thu Sep 23 09:16:05 2010 +0000
Allow to set the frame rate in v4l2 devices
Patch by José Miguel Gonçalves (jose DOT goncalves AT inov DOT pt)
$ ffplay -f video4linux2 /dev/video0 FFplay version git-6ac6e3d, Copyright (c) 2003-2010 the FFmpeg developers built on Jun 21 2011 01:05:14 with gcc 4.5.3 configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc --disable-encoders --disable-muxers libavutil 50.27. 0 / 50.27. 0 libavcore 0. 9. 0 / 0. 9. 0 libavcodec 52.89. 0 / 52.89. 0 libavformat 52.78. 5 / 52.78. 5 libavdevice 52. 2. 2 / 52. 2. 2 libavfilter 1.39. 0 / 1.39. 0 libswscale 0.11. 0 / 0.11. 0 [video4linux2 @ 0x103e6d0] Estimating duration from bitrate, this may be inaccurate Input #0, video4linux2, from '/dev/video0': Duration: N/A, start: 1308611201.235607, bitrate: 132710 kb/s Stream #0.0: Video: rawvideo, yuv420p, 768x576, 132710 kb/s, 25 tbr, 1000k tbn, 25 tbc 1308611201.62 A-V: 0.000 s:0.2 aq= 0KB vq= 0KB sq= 0B f=0/9$ ffplay -f video4linux2 /dev/video0 FFplay version git-70f7736, Copyright (c) 2003-2010 the FFmpeg developers built on Jun 21 2011 01:07:25 with gcc 4.5.3 configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc --disable-encoders --disable-muxers libavutil 50.27. 0 / 50.27. 0 libavcore 0. 9. 0 / 0. 9. 0 libavcodec 52.89. 0 / 52.89. 0 libavformat 52.78. 5 / 52.78. 5 libavdevice 52. 2. 2 / 52. 2. 2 libavfilter 1.39. 0 / 1.39. 0 libswscale 0.11. 0 / 0.11. 0 [video4linux2 @ 0x103e6d0] ioctl set time per frame(1/25) failed /dev/video0: Input/output error
Change History (4)
comment:1 by , 14 years ago
comment:2 by , 14 years ago
Analyzed by developer: | set |
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Resolution: | → fixed |
Status: | new → closed |
Fixed in:
commit b6bde8c7702f6e6a485594fb5831e5bc04b2e763 Author: Anton Khirnov <anton@khirnov.net> Date: Thu Jun 9 10:58:23 2011 +0200 ffplay: use new avformat_open_* API.
It's also possible to change the framerate using the private option -framerate.
comment:3 by , 13 years ago
Keywords: | v4l added |
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comment:4 by , 12 years ago
Keywords: | v4l2 added; v4l removed |
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AFAIK the patch was fine and I used v4l2 so many times with no problem since then so I cannot reproduce it here. Please debug it, it should be pretty easy to spot why you get that error.