Using the latest version on the same example I get 4 frames. The video is 02.83 seconds long, so even if the first frame is generated on the 0 second, I would expect 3 frames.
benblack$ ffmpeg -i example.mov -f image2 -r 1 preview-%d.jpeg ffmpeg version git-2015-02-11-194165a Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-4) configuration: --prefix=/home/benblack/ffmpeg_build --extra-cflags=-I/home/benblack/ffmpeg_build/include --extra-ldflags=-L/home/benblack/ffmpeg_build/lib --bindir=/home/benblack/bin --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 libavutil 54. 18.100 / 54. 18.100 libavcodec 56. 21.102 / 56. 21.102 libavformat 56. 19.101 / 56. 19.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 10.100 / 5. 10.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'example.mov': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2015-02-11 16:52:01 Duration: 00:00:02.83, start: 0.000000, bitrate: 736 kb/s Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 638x468 [SAR 1:1 DAR 319:234], 726 kb/s, 59.29 fps, 60 tbr, 6k tbn, 12k tbc (default) Metadata: creation_time : 2015-02-11 16:52:01 handler_name : Core Media Data Handler encoder : H.264 [swscaler @ 0x23f10c0] deprecated pixel format used, make sure you did set range correctly Output #0, image2, to 'preview-%d.jpeg': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt encoder : Lavf56.19.101 Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 638x468 [SAR 1:1 DAR 319:234], q=2-31, 200 kb/s, 1 fps, 1 tbn, 1 tbc (default) Metadata: creation_time : 2015-02-11 16:52:01 handler_name : Core Media Data Handler encoder : Lavc56.21.102 mjpeg Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native)) Press [q] to stop, [?] for help frame= 4 fps=0.0 q=1.7 Lsize=N/A time=00:00:04.00 bitrate=N/A dup=0 drop=164 video:244kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
