[FFmpeg-trac] #2367(undetermined:new): input_format / -pixel_format => libv4l2: error dequeuing buf: Resource temporarily unavailable
FFmpeg
trac at avcodec.org
Fri Apr 12 19:59:26 CEST 2013
#2367: input_format / -pixel_format => libv4l2: error dequeuing buf: Resource
temporarily unavailable
--------------------------------+----------------------------------------
Reporter: MrNice | Owner:
Type: defect | Status: new
Priority: normal | Component: undetermined
Version: 1.1.3 | Resolution:
Keywords: v4l2 | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
--------------------------------+----------------------------------------
Comment (by holden):
Hi, thanks for the test and sorry for the late reply. I was not able to
reproduce the problem:
{{{
$ ffmpeg -y -loglevel debug -f alsa -ac 2 -channel_layout stereo -i hw:0,0
-f v4l2 -channel 1 -input_format yuyv422 -i /dev/video0 -map 0:a -map 1:v
-c:a pcm_s16le -c:v ffv1 FF.avi
ffmpeg version N-51696-gb4eb06d Copyright (c) 2000-2013 the FFmpeg
developers
built on Apr 9 2013 20:59:53 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
configuration: --enable-gpl --enable-x11grab --enable-libxvid --enable-
libmp3lame --enable-libtheora --enable-libvorbis --enable-libopus
--enable-libvpx --enable-libx264
libavutil 52. 25.100 / 52. 25.100
libavcodec 55. 2.100 / 55. 2.100
libavformat 55. 1.100 / 55. 1.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 49.101 / 3. 49.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Splitting the commandline.
Reading option '-y' ... matched as option 'y' (overwrite output files)
with argument '1'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument 'debug'.
Reading option '-f' ... matched as option 'f' (force format) with argument
'alsa'.
Reading option '-ac' ... matched as option 'ac' (set number of audio
channels) with argument '2'.
Reading option '-channel_layout' ... matched as option 'channel_layout'
(set channel layout) with argument 'stereo'.
Reading option '-i' ... matched as input file with argument 'hw:0,0'.
Reading option '-f' ... matched as option 'f' (force format) with argument
'v4l2'.
Reading option '-channel' ... matched as AVOption 'channel' with argument
'1'.
Reading option '-input_format' ... matched as AVOption 'input_format' with
argument 'yuyv422'.
Reading option '-i' ... matched as input file with argument '/dev/video0'.
Reading option '-map' ... matched as option 'map' (set input stream
mapping) with argument '0:a'.
Reading option '-map' ... matched as option 'map' (set input stream
mapping) with argument '1:v'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument
'pcm_s16le'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument
'ffv1'.
Reading option 'FF.avi' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input file hw:0,0.
Applying option f (force format) with argument alsa.
Applying option ac (set number of audio channels) with argument 2.
Applying option channel_layout (set channel layout) with argument stereo.
Successfully parsed a group of options.
Opening an input file: hw:0,0.
[alsa @ 0x28a9a40] All info found
Input #0, alsa, from 'hw:0,0':
Duration: N/A, start: 1365788762.263006, bitrate: 1536 kb/s
Stream #0:0, 1, 1/1000000: Audio: pcm_s16le, 48000 Hz, stereo, s16,
1536 kb/s
Successfully opened the file.
Parsing a group of options: input file /dev/video0.
Applying option f (force format) with argument v4l2.
Successfully parsed a group of options.
Opening an input file: /dev/video0.
[video4linux2,v4l2 @ 0x28bea80] fd:3 capabilities:5010015
[video4linux2,v4l2 @ 0x28bea80] Selecting input_channel: 1
[video4linux2,v4l2 @ 0x28bea80] Current input_channel: 1, input_name:
Composite1
[video4linux2,v4l2 @ 0x28bea80] Querying the device for the current frame
size
[video4linux2,v4l2 @ 0x28bea80] Setting frame size to 720x576
[video4linux2,v4l2 @ 0x28bea80] The V4L2 driver is using the interlaced
mode
[video4linux2,v4l2 @ 0x28bea80] Current standard: PAL, id: 255,
frameperiod: 1/25
[video4linux2,v4l2 @ 0x28bea80] All info found
Input #1, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 1365788762.329118, bitrate: 165888 kb/s
Stream #1:0, 1, 1/1000000: Video: rawvideo (YUY2 / 0x32595559),
yuyv422, 720x576, 1/1000000, 165888 kb/s, 25 fps, 25 tbr, 1000k tbn, 1000k
tbc
Successfully opened the file.
Parsing a group of options: output file FF.avi.
Applying option map (set input stream mapping) with argument 0:a.
Applying option map (set input stream mapping) with argument 1:v.
Applying option c:a (codec name) with argument pcm_s16le.
Applying option c:v (codec name) with argument ffv1.
Successfully parsed a group of options.
Opening an output file: FF.avi.
Successfully opened the file.
[abuffer @ 0x289aaa0] Setting entry with key 'time_base' to value
'1/48000'
[abuffer @ 0x289aaa0] Setting entry with key 'sample_rate' to value
'48000'
[abuffer @ 0x289aaa0] Setting entry with key 'sample_fmt' to value 's16'
[abuffer @ 0x289aaa0] Setting entry with key 'channel_layout' to value
'0x3'
[graph 0 input from stream 0:0 @ 0x28bb500] tb:1/48000 samplefmt:s16
samplerate:48000 chlayout:0x3
[aformat @ 0x289a9c0] Setting entry with key 'sample_fmts' to value 's16'
[AVFilterGraph @ 0x28bb480] query_formats: 4 queried, 9 merged, 0 already
done, 0 delayed
[buffer @ 0x28c8a60] Setting entry with key 'video_size' to value
'720x576'
[buffer @ 0x28c8a60] Setting entry with key 'pix_fmt' to value '1'
[buffer @ 0x28c8a60] Setting entry with key 'time_base' to value
'1/1000000'
[buffer @ 0x28c8a60] Setting entry with key 'pixel_aspect' to value '0/1'
[buffer @ 0x28c8a60] Setting entry with key 'sws_param' to value 'flags=2'
[buffer @ 0x28c8a60] Setting entry with key 'frame_rate' to value '25/1'
[graph 1 input from stream 1:0 @ 0x28be480] w:720 h:576 pixfmt:yuyv422
tb:1/1000000 fr:25/1 sar:0/1 sws_param:flags=2
[scale @ 0x28c92e0] Setting 'w' to value '0'
[scale @ 0x28c92e0] Setting 'h' to value '0'
[scale @ 0x28c92e0] Setting 'flags' to value '0x4'
[auto-inserted scaler 0 @ 0x28c91c0] w:0 h:0 flags:'0x4' interl:0
[format @ 0x28bdc00] auto-inserting filter 'auto-inserted scaler 0'
between the filter 'Parsed_null_0' and the filter 'format'
[AVFilterGraph @ 0x28be2e0] query_formats: 4 queried, 3 merged, 1 already
done, 0 delayed
[auto-inserted scaler 0 @ 0x28c91c0] picking yuv422p out of 26 ref:yuyv422
alpha:0
[auto-inserted scaler 0 @ 0x28c91c0] w:720 h:576 fmt:yuyv422 sar:0/1 ->
w:720 h:576 fmt:yuv422p sar:0/1 flags:0x4
[ffv1 @ 0x28bd280] detected 1 logical cores
Output #0, avi, to 'FF.avi':
Metadata:
ISFT : Lavf55.1.100
Stream #0:0, 0, 1/48000: Audio: pcm_s16le ([1][0][0][0] / 0x0001),
48000 Hz, stereo, s16, 1536 kb/s
Stream #0:1, 0, 1/25: Video: ffv1 (FFV1 / 0x31564646), yuv422p,
720x576, 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le)
Stream #1:0 -> #0:1 (rawvideo -> ffv1)
Press [q] to stop, [?] for help
frame= 1009 fps= 25 q=0.0 Lsize= 97450kB time=00:00:40.38
bitrate=19768.6kbits/s
video:86997kB audio:7572kB subtitle:0 global headers:0kB muxing overhead
3.047274%
Statistics: 10 seeks, 124607 writeouts
}}}
The bug in the title has already been solved, and this new issue is
probably something not related to v4l2, but it has to do with the avi
muxer... so I think a new ticket should be opened. Thanks.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2367#comment:6>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list