I can't say for certain as its been some time since I used ffmpeg, but there are only a fixed number of resolutions to pass to ffmpeg using the -s size parameter and the behavior isn't what you're probably looking for. What you probably need to look at is the scaling filter:
https://ffmpeg.org/ffmpeg-filters.html#scale https://trac.ffmpeg.org/wiki/Scaling On Mon, Feb 26, 2018 at 8:06 AM DiegoUG <diego.uribe.ga...@gmail.com> wrote: > Hello, can someone guide me a little towards the solution? > > I really do not understand what it is, and with another camera the same > thing is happening to me. > > 2018-02-23 0:34 GMT-05:00 DiegoUG <diego.uribe.ga...@gmail.com>: > > > Hello, > > > > I'm doing a capture of an image from the docker using my web cam, but the > > docker is doing it at a resolution of 176x144 and outside of the docker > in > > my localhost it takes it to 640x360, in both it's the same installation, > I > > do not know it's happening: > > > > Docker ------------------------------------------------------------ > > ----------------------- > > # ffmpeg -r 1 -f v4l2 -s 720x480 -i /dev/video0 -vframes 1 menu%d.jpg > > > > ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers > > built with gcc 7 (Debian 7.3.0-3) > > configuration: --disable-debug --disable-doc --disable-ffplay > > --enable-shared --enable-avresample --enable-libopencore-amrnb > > --enable-libopencore-amrwb --enable-gpl --enable-libass > > --enable-libfreetype --enable-libvidstab --enable-libmp3lame > > --enable-libopenjpeg --enable-libopus --enable-libtheora > --enable-libvorbis > > --enable-libvpx --enable-libx265 --enable-libxvid --enable-libx264 > > --enable-nonfree --enable-openssl --enable-libfdk_aac --enable-libkvazaar > > --enable-postproc --enable-small --enable-version3 > > --extra-cflags=-I/opt/ffmpeg/include --extra-ldflags=-L/opt/ffmpeg/lib > > --extra-libs=-ldl --prefix=/opt/ffmpeg > > libavutil 55. 78.100 / 55. 78.100 > > libavcodec 57.107.100 / 57.107.100 > > libavformat 57. 83.100 / 57. 83.100 > > libavdevice 57. 10.100 / 57. 10.100 > > libavfilter 6.107.100 / 6.107.100 > > libavresample 3. 7. 0 / 3. 7. 0 > > libswscale 4. 8.100 / 4. 8.100 > > libswresample 2. 9.100 / 2. 9.100 > > libpostproc 54. 7.100 / 54. 7.100 > > [video4linux2,v4l2 @ 0x55cbd71f70a0] The V4L2 driver changed the video > > from 720x480 to 176x144 > > [video4linux2,v4l2 @ 0x55cbd71f70a0] The driver changed the time per > frame > > from 1/1 to 1/5 > > Input #0, video4linux2,v4l2, from '/dev/video0': > > Duration: N/A, start: 59614.860847, bitrate: 2027 kb/s > > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 176x144, > > 2027 kb/s, 5 fps, 5 tbr, 1000k tbn, 1000k tbc > > Stream mapping: > > Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native)) > > Press [q] to stop, [?] for help > > [swscaler @ 0x55cbd7209280] deprecated pixel format used, make sure you > > did set range correctly > > Output #0, image2, to 'menu%d.jpg': > > Metadata: > > encoder : Lavf57.83.100 > > Stream #0:0: Video: mjpeg, yuvj422p(pc), 176x144, q=2-31, 200 kb/s, 1 > > fps, 1 tbn, 1 tbc > > Metadata: > > encoder : Lavc57.107.100 mjpeg > > Side data: > > cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1 > > frame= 1 fps=0.0 q=2.7 Lsize=N/A time=00:00:01.00 bitrate=N/A speed= > > 424x > > video:3kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB > > muxing overhead: unknown > > ------------------------------------------------------------ > > --------------------------------- > > > > > > local ------------------------------------------------------ > > -------------------------------- > > # ffmpeg -r 1 -f v4l2 -s 720x480 -i /dev/video0 -vframes 1 menu%d.jpg > > > > ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers > > built with gcc 7.3.0 (GCC) > > configuration: --prefix=/usr --disable-debug --disable-static > > --disable-stripping --enable-avisynth --enable-avresample > > --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl > > --enable-ladspa --enable-libass --enable-libbluray --enable-libfreetype > > --enable-libfribidi --enable-libgsm --enable-libiec61883 > > --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb > > --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus > > --enable-libpulse --enable-libsoxr --enable-libspeex --enable-libssh > > --enable-libtheora --enable-libv4l2 --enable-libvidstab > --enable-libvorbis > > --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 > > --enable-libxcb --enable-libxml2 --enable-libxvid --enable-shared > > --enable-version3 --enable-omx > > libavutil 55. 78.100 / 55. 78.100 > > libavcodec 57.107.100 / 57.107.100 > > libavformat 57. 83.100 / 57. 83.100 > > libavdevice 57. 10.100 / 57. 10.100 > > libavfilter 6.107.100 / 6.107.100 > > libavresample 3. 7. 0 / 3. 7. 0 > > libswscale 4. 8.100 / 4. 8.100 > > libswresample 2. 9.100 / 2. 9.100 > > libpostproc 54. 7.100 / 54. 7.100 > > [video4linux2,v4l2 @ 0x55c87b781a40] The V4L2 driver changed the video > > from 720x480 to 640x480 > > [video4linux2,v4l2 @ 0x55c87b781a40] The driver changed the time per > frame > > from 1/1 to 1/15 > > Input #0, video4linux2,v4l2, from '/dev/video0': > > Duration: N/A, start: 59593.137905, bitrate: 73728 kb/s > > Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, > > 73728 kb/s, 15 fps, 15 tbr, 1000k tbn, 1000k tbc > > Stream mapping: > > Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native)) > > Press [q] to stop, [?] for help > > [swscaler @ 0x55c87b7935e0] deprecated pixel format used, make sure you > > did set range correctly > > Output #0, image2, to 'menu%d.jpg': > > Metadata: > > encoder : Lavf57.83.100 > > Stream #0:0: Video: mjpeg, yuvj422p(pc), 640x480, q=2-31, 200 kb/s, 1 > > fps, 1 tbn, 1 tbc > > Metadata: > > encoder : Lavc57.107.100 mjpeg > > Side data: > > cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1 > > frame= 1 fps=0.0 q=4.9 Lsize=N/A time=00:00:01.00 bitrate=N/A speed= > > 178x > > video:21kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB > > muxing overhead: unknown > > ------------------------------------------------------------ > > --------------------------------- > > > > I checked how the camera was detected and I saw a difference, but I do > not > > know why > > > > Docker ------------------------------------------------------------ > > ----------------------- > > # ffmpeg -f v4l2 -list_formats all -i /dev/video0 > > > > ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers > > built with gcc 7 (Debian 7.3.0-3) > > configuration: --disable-debug --disable-doc --disable-ffplay > > --enable-shared --enable-avresample --enable-libopencore-amrnb > > --enable-libopencore-amrwb --enable-gpl --enable-libass > > --enable-libfreetype --enable-libvidstab --enable-libmp3lame > > --enable-libopenjpeg --enable-libopus --enable-libtheora > --enable-libvorbis > > --enable-libvpx --enable-libx265 --enable-libxvid --enable-libx264 > > --enable-nonfree --enable-openssl --enable-libfdk_aac --enable-libkvazaar > > --enable-postproc --enable-small --enable-version3 > > --extra-cflags=-I/opt/ffmpeg/include --extra-ldflags=-L/opt/ffmpeg/lib > > --extra-libs=-ldl --prefix=/opt/ffmpeg > > libavutil 55. 78.100 / 55. 78.100 > > libavcodec 57.107.100 / 57.107.100 > > libavformat 57. 83.100 / 57. 83.100 > > libavdevice 57. 10.100 / 57. 10.100 > > libavfilter 6.107.100 / 6.107.100 > > libavresample 3. 7. 0 / 3. 7. 0 > > libswscale 4. 8.100 / 4. 8.100 > > libswresample 2. 9.100 / 2. 9.100 > > libpostproc 54. 7.100 / 54. 7.100 > > [video4linux2,v4l2 @ 0x55e122701f60] Raw : yuyv422 : > > YUYV 4:2:2 : 160x90 160x120 176x144 > > [video4linux2,v4l2 @ 0x55e122701f60] Compressed: h264 : > > H.264 : 640x480 160x90 160x120 176x144 320x180 320x240 352x288 > 432x240 > > 640x360 800x448 800x600 864x480 960x720 1024x576 1280x720 > > [video4linux2,v4l2 @ 0x55e122701f60] Compressed: mjpeg : > > Motion-JPEG : 640x480 160x90 160x120 176x144 320x180 320x240 352x288 > > 432x240 640x360 > > ------------------------------------------------------------ > > --------------------------------- > > > > local ------------------------------------------------------ > > -------------------------------- > > # ffmpeg -f v4l2 -list_formats all -i /dev/video0 > > > > ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers > > built with gcc 7.3.0 (GCC) > > configuration: --prefix=/usr --disable-debug --disable-static > > --disable-stripping --enable-avisynth --enable-avresample > > --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl > > --enable-ladspa --enable-libass --enable-libbluray --enable-libfreetype > > --enable-libfribidi --enable-libgsm --enable-libiec61883 > > --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb > > --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus > > --enable-libpulse --enable-libsoxr --enable-libspeex --enable-libssh > > --enable-libtheora --enable-libv4l2 --enable-libvidstab > --enable-libvorbis > > --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 > > --enable-libxcb --enable-libxml2 --enable-libxvid --enable-shared > > --enable-version3 --enable-omx > > libavutil 55. 78.100 / 55. 78.100 > > libavcodec 57.107.100 / 57.107.100 > > libavformat 57. 83.100 / 57. 83.100 > > libavdevice 57. 10.100 / 57. 10.100 > > libavfilter 6.107.100 / 6.107.100 > > libavresample 3. 7. 0 / 3. 7. 0 > > libswscale 4. 8.100 / 4. 8.100 > > libswresample 2. 9.100 / 2. 9.100 > > libpostproc 54. 7.100 / 54. 7.100 > > [video4linux2,v4l2 @ 0x55b84fec19c0] Raw : yuyv422 : > > YUYV 4:2:2 : 640x480 320x180 320x240 352x288 424x240 640x360 848x480 > > 960x540 1280x720 > > [video4linux2,v4l2 @ 0x55b84fec19c0] Compressed: mjpeg : > > Motion-JPEG : 640x480 320x180 320x240 352x288 424x240 640x360 848x480 > > 960x540 1280x720 > > > > ------------------------------------------------------------ > > --------------------------------- > > > > -- > > *Diego Alonso Uribe Gamez* > > ------------------------------ > > > > *Desarrollador web* > > > > Twitter: @DiegoUG <http://www.twitter.com/DiegoUG> > > > > Google+: +DiegoAlonsoUribeGamez > > <https://plus.google.com/+DiegoAlonsoUribeGamez> > > ------------------------------ > > > > > > > -- > *Diego Alonso Uribe Gamez* > ------------------------------ > > *Desarrollador web* > > Twitter: @DiegoUG <http://www.twitter.com/DiegoUG> > > Google+: +DiegoAlonsoUribeGamez > <https://plus.google.com/+DiegoAlonsoUribeGamez> > ------------------------------ > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". -- There be monsters out there... consider using PGP/GPG encryption for confidential communications. My public key can be found here <https://drive.google.com/file/d/0B9VvIkxWz5nhWkd5SFVUaWZqVWc/view?usp=sharing> . _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
