[FFmpeg-trac] #956(FFmpeg:closed): ffmpeg V0.10 cannot convert to a jpg file, but ffmpeg v0.9 can

[FFmpeg]

#956: ffmpeg V0.10 cannot convert to a jpg file, but ffmpeg v0.9 can
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  chenct1976@…                       |                   Status:  closed
                 Type:  defect       |                Component:  FFmpeg
             Priority:  normal       |               Resolution:
              Version:  0.10         |  worksforme
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:  convert jpg file Error =>
 * status:  new => closed
 * resolution:   => worksforme
 * reproduced:  1 => 0


Comment:

 Unrelated to your problem that I cannot reproduce:
 "-f image2" is superfluous, -vframes is an output option, it has no effect
 when used before "-i".
 {{{
 $ md5sum input.mp4
 7ab621d46e9ec4b6d0d2bbd0c697539a  input.mp4
 $ ffmpeg -ss 20 -vframes 1 -t 0.001 -i input.mp4 -y -f image2 -s 350x240
 outfile.jpg
 ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers
   built on Jan 30 2012 09:47:43 with gcc 4.5.3
   configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
   libavutil      51. 34.101 / 51. 34.101
   libavcodec     53. 60.100 / 53. 60.100
   libavformat    53. 31.100 / 53. 31.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 60.100 /  2. 60.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0.  6.100 /  0.  6.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf53.31.100
     comment         : FlixEngineLinux_8.0.16.0 (www.on2.com)
   Duration: 00:00:35.03, start: 0.000000, bitrate: 517 kb/s
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 540x360 [SAR 1:1 DAR 3:2], 383 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95
 tbc
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo,
 s16, 128 kb/s
     Metadata:
       handler_name    :
 Incompatible pixel format 'yuv420p' for codec 'mjpeg', auto-selecting
 format 'yuvj420p'
 [buffer @ 0x13dab40] w:540 h:360 pixfmt:yuv420p tb:1/1000000 sar:1/1
 sws_param:
 [scale @ 0x13db1a0] w:540 h:360 fmt:yuv420p -> w:350 h:240 fmt:yuvj420p
 flags:0x4
 Output #0, image2, to 'outfile.jpg':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     comment         : FlixEngineLinux_8.0.16.0 (www.on2.com)
     encoder         : Lavf53.31.100
     Stream #0:0(und): Video: mjpeg, yuvj420p, 350x240 [SAR 36:35 DAR 3:2],
 q=2-31, 200 kb/s, 90k tbn, 23.98 tbc
     Metadata:
       handler_name    : VideoHandler
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 -> mjpeg)
 Press [q] to stop, [?] for help
 [image2 @ 0x13ee3c0] Could not get frame filename number 2 from pattern
 'outfile.jpg'
 av_interleaved_write_frame(): Invalid argument
 $ file outfile.jpg
 outfile.jpg: JPEG image data, JFIF standard 1.02, comment: "Lavc53.60.100"
 }}}
 The error in my output ("Could not get frame filename number 2") can be
 avoided with "-vframes 1" after "-i input.mp4", the output file
 outfile.jpg is created in any case.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/956#comment:1>
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