Re: [FFmpeg-user] Webcam capture
Rodolfo Medina writes: > Leonardo via ffmpeg-user writes: > >> Since you have an AMD cpu/apu, one last resort that I can think of is to >> capture webcam with hardware acceleration. >> >> > > > Nothing, the problem remains... it gets stuck for some seconds... The problem also occurs with another computer of mine, Intel, old: $ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping: 2 microcode : 0x212 cpu MHz : 1210.046 cache size : 512 KB physical id : 0 siblings: 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug: no f00f_bug: no coma_bug: no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts cpuid aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm bugs: bogomips: 3192.03 clflush size: 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping: 2 microcode : 0x212 cpu MHz : 1159.421 cache size : 512 KB physical id : 0 siblings: 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug: no f00f_bug: no coma_bug: no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts cpuid aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm bugs: bogomips: 3192.03 clflush size: 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: $ ffmpeg -f alsa -i hw:0,0 -f video4linux2 -s 640x480 -i /dev/video0 out.mpg ffmpeg version 4.1.4-1~deb10u1 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --prefix=/usr --extra-version='1~deb10u1' --toolchain=hardened --libdir=/usr/lib/i386-linux-gnu --incdir=/usr/include/i386-linux-gnu --arch=i386 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --ignore-tests='hapenc-hap-none,hapenc-hapa-none,hapenc-hapq-none' --enable-shared libavutil 56. 22.100 / 56. 22.100 libavcodec 58. 35.100 / 58. 35.100 libavformat58. 20.100 / 58. 20.100 libavdevice58. 5.100 / 58. 5.100 libavfilter 7. 40.101 / 7. 40.101 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 3.100 / 5. 3.100 libswresample 3. 3.100 / 3. 3.100 libpostproc55. 3.100 / 55. 3.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, alsa, from 'hw:0,0': Duration: N/A, start: 1595450904.939058, bitrate: 1536 kb/s Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Input #1, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 556.262393, bitrate: 147456 kb/s Stream #1:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc File 'out.mpg' already exists. Overwrite ? [y/N] y Stream mapping: Stream #1:0 -> #0:0 (rawvideo (native) -> mpeg1video (native)) Stream #0:0 -> #0:1 (pcm_s16le (native) -> mp2 (native)) Press [q] to stop, [?] for help [alsa @ 0x1464ac0] ALSA buffer xrun. [mpeg @ 0x147a040] VBV buffer size not set, using default size of 230KB If you want the mpeg file to be compliant to some specification Like DVD, VCD or others, make sure you set the correct buffer size Output #0, mpeg, to
Re: [FFmpeg-user] Webcam capture
Leonardo via ffmpeg-user writes: > Since you have an AMD cpu/apu, one last resort that I can think of is to > capture webcam with hardware acceleration. > > > Extracted from https://trac.ffmpeg.org/wiki/Hardware/VAAPI > > Also, you need to verify what "-vaapi_device" is the correct one for your > machine. > The wiki has much more information. > > > "Camera Capture > > > Capture a raw stream from a V4L2 camera device and encode it as H.264: > > > $ ffmpeg -vaapi_device /dev/dri/renderD128 -f v4l2 -video_size 1920x1080 -i > /dev/video0 -vf 'format=nv12,hwupload' -c:v h264_vaapi output.mp4 > > > ... " Nothing, the problem remains... it gets stuck for some seconds... rodolfo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Webcam capture
Since you have an AMD cpu/apu, one last resort that I can think of is to capture webcam with hardware acceleration. Extracted from https://trac.ffmpeg.org/wiki/Hardware/VAAPI Also, you need to verify what "-vaapi_device" is the correct one for your machine. The wiki has much more information. "Camera Capture Capture a raw stream from a V4L2 camera device and encode it as H.264: $ ffmpeg -vaapi_device /dev/dri/renderD128 -f v4l2 -video_size 1920x1080 -i /dev/video0 -vf 'format=nv12,hwupload' -c:v h264_vaapi output.mp4 ... " Kind regards, Leonardo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Webcam capture
Leonardo via ffmpeg-user writes: > What is the output of > > $ cat /proc/cpuinfo > > ? Here it is: processor : 0 vendor_id : AuthenticAMD cpu family : 22 model : 48 model name : AMD A6-7310 APU with AMD Radeon R4 Graphics stepping: 1 microcode : 0x7030105 cpu MHz : 998.353 cache size : 2048 KB physical id : 0 siblings: 4 core id : 0 cpu cores : 4 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good acc_power nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt topoext perfctr_nb bpext ptsc perfctr_llc cpb hw_pstate ssbd vmmcall bmi1 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists pausefilter pfthreshold overflow_recov bugs: fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass bogomips: 3992.78 TLB size: 1024 4K pages clflush size: 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts ttp tm 100mhzsteps hwpstate cpb acc_power [13] processor : 1 vendor_id : AuthenticAMD cpu family : 22 model : 48 model name : AMD A6-7310 APU with AMD Radeon R4 Graphics stepping: 1 microcode : 0x7030105 cpu MHz : 1003.070 cache size : 2048 KB physical id : 0 siblings: 4 core id : 1 cpu cores : 4 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good acc_power nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt topoext perfctr_nb bpext ptsc perfctr_llc cpb hw_pstate ssbd vmmcall bmi1 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists pausefilter pfthreshold overflow_recov bugs: fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass bogomips: 3992.78 TLB size: 1024 4K pages clflush size: 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts ttp tm 100mhzsteps hwpstate cpb acc_power [13] processor : 2 vendor_id : AuthenticAMD cpu family : 22 model : 48 model name : AMD A6-7310 APU with AMD Radeon R4 Graphics stepping: 1 microcode : 0x7030105 cpu MHz : 998.310 cache size : 2048 KB physical id : 0 siblings: 4 core id : 2 cpu cores : 4 apicid : 2 initial apicid : 2 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good acc_power nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt topoext perfctr_nb bpext ptsc perfctr_llc cpb hw_pstate ssbd vmmcall bmi1 xsaveopt arat npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists pausefilter pfthreshold overflow_recov bugs: fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass bogomips: 3992.78 TLB size: 1024 4K pages clflush size: 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts ttp tm 100mhzsteps hwpstate cpb acc_power [13] processor : 3 vendor_id : AuthenticAMD cpu family : 22 model : 48 model name : AMD A6-7310 APU with AMD Radeon R4 Graphics stepping: 1 microcode : 0x7030105 cpu MHz : 998.258 cache size : 2048 KB physical id : 0 siblings: 4 core id : 3 cpu cores : 4 apicid : 3 initial apicid : 3 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good acc_power nopl nonstop_tsc
Re: [FFmpeg-user] Webcam capture
What is the output of $ cat /proc/cpuinfo ? ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Webcam capture
Leonardo via ffmpeg-user writes: > Hello, > > as an alternative, you can display your webcam at screen with mplayer > > $ mplayer tv:// -tv > driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:outfmt=yuy2 > -noborder -geometry 640x480+0+0 > > and record your screen+audio with ffmpeg (here I'm using pulseaudio because of > the "noise-reduction") > > > $ ffmpeg -thread_queue_size 1024 -f pulse -sample_rate 44100 -i default > -video_size 640x480 -probesize 10M -framerate 30 -thread_queue_size 512 -f > x11grab -i :0.0 -c:a aac -b:a 128k -c:v libx264 -vf "format=yuv420p" -crf 0 > -preset ultrafast output.mp4 > > You can use > > $ uvcdynctrl -f > > to identify which resolution/fps your webcam supports and edit commands above > to your needs. Thank you, Leonardo... but the problem remains: when I watch the resulting video, it freezes for many seconds at start... $ uvcdynctrl -f Listing available frame formats for device video0: Pixel format: YUYV (YUYV 4:2:2; MIME type: video/x-raw-yuv) Frame size: 640x480 Frame rates: 30, 30 Frame size: 320x240 Frame rates: 30 Frame size: 160x120 Frame rates: 30 Frame size: 640x480 Frame rates: 30, 30 $ mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:outfmt=yuy2 -noborder -geometry 640x480+0+0 MPlayer 1.3.0 (Debian), built with gcc-8 (C) 2000-2016 MPlayer Team do_connect: could not connect to socket connect: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. Playing tv://. TV file format detected. Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski comment: first try, more to come ;-) v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. Selected device: BZ IR: BZ IR Capabilities: video capture streaming supported norms: inputs: 0 = Camera 1; Current input: 0 Current format: YUYV tv.c: norm_from_string(pal): Bogus norm parameter, setting default. v4l2: ioctl enum norm failed: Inappropriate ioctl for device Error: Cannot set norm! Selected input hasn't got a tuner! v4l2: ioctl set mute failed: Invalid argument == Opening video decoder: [raw] RAW Uncompressed Video Movie-Aspect is undefined - no prescaling applied. VO: [vdpau] 640x480 => 640x480 Packed YUY2 Selected video codec: [rawyuy2] vfm: raw (RAW YUY2) == Audio: no sound Starting playback... V: 0.0 154/154 ??% ??% ??,?% 0 0 $ ffmpeg -thread_queue_size 1024 -f pulse -sample_rate 44100 -i default -video_size 640x480 -probesize 10M -framerate 30 -thread_queue_size 512 -f x11grab -i :0.0 -c:a aac -b:a 128k -c:v libx264 -vf "format=yuv420p" -crf 0 -preset ultrafast output.mp4 ffmpeg version 4.1.4-1+b2 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9 (Debian 9.2.1-1) configuration: --prefix=/usr --extra-version=1+b2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 22.100 / 56. 22.100 libavcodec 58. 35.100 / 58. 35.100 libavformat58. 20.100 / 58. 20.100 libavdevice58. 5.100 / 58. 5.100 libavfilter 7. 40.101 / 7. 40.101 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 3.100 / 5. 3.100 libswresample 3. 3.100 / 3. 3.100 libpostproc55. 3.100 / 55. 3.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, pulse, from 'default': Duration: N/A, start: 1595442907.483712, bitrate: 1411 kb/s Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s Input #1, x11grab, from ':0.0': Duration: N/A, start: 1595442908.796004, bitrate: N/A Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 640x480, 30 fps, 30 tbr, 1000k tbn, 1000k tbc File 'output.mp4' already exists. Overwrite
Re: [FFmpeg-user] Webcam capture
Hello, as an alternative, you can display your webcam at screen with mplayer $ mplayer tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:fps=30:outfmt=yuy2 -noborder -geometry 640x480+0+0 and record your screen+audio with ffmpeg (here I'm using pulseaudio because of the "noise-reduction") $ ffmpeg -thread_queue_size 1024 -f pulse -sample_rate 44100 -i default -video_size 640x480 -probesize 10M -framerate 30 -thread_queue_size 512 -f x11grab -i :0.0 -c:a aac -b:a 128k -c:v libx264 -vf "format=yuv420p" -crf 0 -preset ultrafast output.mp4 You can use $ uvcdynctrl -f to identify which resolution/fps your webcam supports and edit commands above to your needs. Kind regards, Leonardo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Webcam capture
Carl Zwanzig writes: > On 7/22/2020 6:22 AM, Rodolfo Medina wrote: >> Same problem also with simply: >> >> $ ffmpeg -f alsa -i hw:1,0 -f video4linux2 -i /dev/video0 out.mpg >> >> , and audio completely out of sync... > > And complete command output is still missing (it's always helpful) > > Since this works-- > mencoder tv:// -tv driver=v4l2:width=640:height=480 [...] > > The computer you're using may not have enough resources to process those large > frames. If the native resolution of the devices is 3200x2400, that's > 23MB/frame, and encoding often needs to keep a few in memory at once. As you > tried in mencover, dial down the capture size in ffmpeg and see if that work. Same problem also with: -s 640x480 $ ffmpeg -f alsa -i hw:1,0 -f video4linux2 -s 640x480 -i /dev/video0 out.mpg > log ffmpeg version 4.1.4-1+b2 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9 (Debian 9.2.1-1) configuration: --prefix=/usr --extra-version=1+b2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 22.100 / 56. 22.100 libavcodec 58. 35.100 / 58. 35.100 libavformat58. 20.100 / 58. 20.100 libavdevice58. 5.100 / 58. 5.100 libavfilter 7. 40.101 / 7. 40.101 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 3.100 / 5. 3.100 libswresample 3. 3.100 / 3. 3.100 libpostproc55. 3.100 / 55. 3.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, alsa, from 'hw:1,0': Duration: N/A, start: 1595439555.172771, bitrate: 1536 kb/s Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Input #1, video4linux2,v4l2, from '/dev/video0': Duration: N/A, start: 23292.147778, bitrate: 147456 kb/s Stream #1:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc File 'out.mpg' already exists. Overwrite ? [y/N] y Stream mapping: Stream #1:0 -> #0:0 (rawvideo (native) -> mpeg1video (native)) Stream #0:0 -> #0:1 (pcm_s16le (native) -> mp2 (native)) Press [q] to stop, [?] for help [alsa @ 0x55b787639980] ALSA buffer xrun. [mpeg @ 0x55b787656ec0] VBV buffer size not set, using default size of 230KB If you want the mpeg file to be compliant to some specification Like DVD, VCD or others, make sure you set the correct buffer size Output #0, mpeg, to 'out.mpg': Metadata: encoder : Lavf58.20.100 Stream #0:0: Video: mpeg1video, yuv420p(progressive), 640x480, q=2-31, 200 kb/s, 30 fps, 90k tbn, 30 tbc Metadata: encoder : Lavc58.35.100 mpeg1video Side data: cpb: bitrate max/min/avg: 0/0/20 buffer size: 0 vbv_delay: -1 Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s Metadata: encoder : Lavc58.35.100 mp2 [video4linux2,v4l2 @ 0x55b787653d00] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8) [alsa @ 0x55b787639980] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8) frame= 991 fps= 32 q=7.5 size=2382kB time=00:00:32.96 bitrate= 592.0kbits/s dup=200 drop=0 speed=1.07x thank you.., rodolfo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Webcam capture
On 7/22/2020 6:22 AM, Rodolfo Medina wrote: Same problem also with simply: $ ffmpeg -f alsa -i hw:1,0 -f video4linux2 -i /dev/video0 out.mpg , and audio completely out of sync... And complete command output is still missing (it's always helpful) Since this works-- mencoder tv:// -tv driver=v4l2:width=640:height=480 [...] The computer you're using may not have enough resources to process those large frames. If the native resolution of the devices is 3200x2400, that's 23MB/frame, and encoding often needs to keep a few in memory at once. As you tried in mencover, dial down the capture size in ffmpeg and see if that work. z! ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Webcam capture
Paul B Mahol writes: > On 7/20/20, Rodolfo Medina wrote: >> Hi all. >> >> When capturing video from webcam, with: >> >> $ ffmpeg -f video4linux2 -s 3200x2400 -i /dev/video0 -vb 20M out.mpg > > 3200x2400 is very big resolution Same problem also with simply: $ ffmpeg -f alsa -i hw:1,0 -f video4linux2 -i /dev/video0 out.mpg , and audio completely out of sync... Thanks, Rodolfo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Webcam capture
On 7/20/20, Rodolfo Medina wrote: > Hi all. > > When capturing video from webcam, with: > > $ ffmpeg -f video4linux2 -s 3200x2400 -i /dev/video0 -vb 20M out.mpg 3200x2400 is very big resolution > > , out.mpg stops, freezes, gets stuck at the beginning for a few seconds. > Only > at the beginning and only for a few seconds. I thought the problem was > related > to the cheap low-quality webcam but it completely disappears when I do > instead: > > $ mencoder tv:// -tv > driver=v4l2:width=640:height=480:device=/dev/video0:forceaudio:alsa:adevice=hw.1,0 > -ovc lavc -oac mp3lame -lameopts cbr:br=64:mode=3 -o webcam.avi > > So what could the cause be of the problem with ffmpeg? > > Thanks for any help. > > Rodolfo > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Webcam capture
Hi all. When capturing video from webcam, with: $ ffmpeg -f video4linux2 -s 3200x2400 -i /dev/video0 -vb 20M out.mpg , out.mpg stops, freezes, gets stuck at the beginning for a few seconds. Only at the beginning and only for a few seconds. I thought the problem was related to the cheap low-quality webcam but it completely disappears when I do instead: $ mencoder tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0:forceaudio:alsa:adevice=hw.1,0 -ovc lavc -oac mp3lame -lameopts cbr:br=64:mode=3 -o webcam.avi So what could the cause be of the problem with ffmpeg? Thanks for any help. Rodolfo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
