※ 引述《Dickon (Deacon)》之銘言：
: 版大你好，因為我沒有用ffmpeg直接操作過裝置，我上網查一下資料如下
: 先查查看裝置有支援哪種輸出格式，指令如下
: ffmpeg -f video4linux2 -list_formats all -i /dev/video0
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a
future release. Please use avconv instead.
[video4linux2 @ 0x2dba0] R : yuyv422 : YUV 4:2:2 (YUYV) : 640x480
320x240 160x120 352x288 176x144 1280x1024 1600x1200
/dev/video0: Immediate exit requested
沒看到有甚麼支援的格式...
: 如果有支援已壓縮過的格式例如 mjpeg，可以試試看
: ffmpeg -f video4linux2 -input_format mjpeg -i /dev/video0 -c:v <IP>
: 如果只有raw的話，可以試試看
: ffmpeg -f video4linux2 -i /dev/video0 <IP>
ffmpeg version 0.8.12-4:0.8.12-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
built on Jun 10 2014 15:48:32 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a
future release. Please use avconv instead.
[video4linux2 @ 0x2daa0] Estimating duration from bitrate, this may be
inaccurate
Input #0, video4linux2, from '/dev/video0':
Duration: N/A, start: 55158.784487, bitrate: 48660 kb/s
Stream #0.0: Video: rawvideo, yuyv422, 352x288, 48660 kb/s, 30 tbr,
1000k tbn, 30 tbc
Sat Jan 1 15:34:32 2000 127.0.0.1 - - [GET] "/cam1.ffm HTTP/1.1" 200 4149
[buffer @ 0x2ee00] w:352 h:288 pixfmt:yuyv422
[scale @ 0x2e8c0] w:352 h:288 fmt:yuyv422 -> w:320 h:240 fmt:yuv420p flags:0x4
Sat Jan 1 15:34:32 2000 127.0.0.1 - - [POST] "/cam1.ffm HTTP/1.1" 200 0
Segmentation fault
: 會segmentation fault應該是bitrate設置錯誤
: 另外建議可以先用ffmpeg編譯完成後附的ffserver.conf，先確定能跑起來，
: 再進行
另外有板友建議我看 muxer 是否有安裝，我用 ffmpeg -formats查詢
DE asf ASF format
E asf_stream ASF format
D video4linux2 Video4Linux2 device grab
====================================================================
muxer似乎是將多個串流、例如字幕、音源、影像和成某整支援的格式例如avi
encoder 似乎就是一種壓縮編碼技術例如 h.264，不知我認知對不對^^"
====================================================================
ffmpeg -codec
Codecs:
D..... = Decoding supported
.E.... = Encoding supported
..V... = Video codec
..A... = Audio codec
..S... = Subtitle codec
...S.. = Supports draw_horiz_band
....D. = Supports direct rendering method 1
.....T = Supports weird frame truncation