मैं मैक OSX 10.12.2 पर स्क्रीन और ऑडियो कैप्चर करने की कोशिश कर रहा हूं। मैं वेबम प्रारूप पसंद करता हूं क्योंकि इसे आसानी से खंडित और प्रवाहित किया जा सकता है। साथ ही cpu का उपयोग अच्छा है। लेकिन इस स्तर पर जहां मेरे लिए कुछ भी काम नहीं करता है। मैं mp4 / h265 / aac में रिकॉर्डिंग स्वीकार करूँगा।
10 लंबे समय तक प्रयास करने और कई बार मेरे सिर को दीवार से टकराने के बाद, ये परिणाम मुझे मिल रहे हैं:
vp8 / vorbis: कोई ध्वनि और वीडियो बहुत तेज नहीं चलता है
ffmpeg -y -f avfoundation -capture_cursor 1 -framerate 25 -r 25 -i 1:0 -vsync 2 -c:v libvpx -c:a libvorbis -b:v 1M -b:a 128K capture.webm
उत्पादन:
ffmpeg version 3.2.2 Copyright (c) 2000-2016 the FFmpeg developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-opencl --disable-lzma --enable-nonfree --enable-vda
libavutil 55. 34.100 / 55. 34.100
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.100 / 57. 56.100
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
[avfoundation @ 0x7fc5c2000000] Selected pixel format (yuv420p) is not supported by the input device.
[avfoundation @ 0x7fc5c2000000] Supported pixel formats:
[avfoundation @ 0x7fc5c2000000] uyvy422
[avfoundation @ 0x7fc5c2000000] yuyv422
[avfoundation @ 0x7fc5c2000000] nv12
[avfoundation @ 0x7fc5c2000000] 0rgb
[avfoundation @ 0x7fc5c2000000] bgr0
[avfoundation @ 0x7fc5c2000000] Overriding selected pixel format to use uyvy422 instead.
[avfoundation @ 0x7fc5c2000000] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, avfoundation, from '1:0':
Duration: N/A, start: 25068.515833, bitrate: 2822 kb/s
Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 2560x1600, 1000k tbr, 1000k tbn, 1000k tbc
Stream #0:1: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s
[libvpx @ 0x7fc5c2842e00] v1.6.0
Output #0, webm, to 'capture.webm':
Metadata:
encoder : Lavf57.56.100
Stream #0:0: Video: vp8 (libvpx), yuv420p, 2560x1600, q=-1--1, 1000 kb/s, 25 fps, 1k tbn, 25 tbc
Metadata:
encoder : Lavc57.64.101 libvpx
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: vorbis (libvorbis), 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.64.101 libvorbis
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> vp8 (libvpx))
Stream #0:1 -> #0:1 (pcm_f32le (native) -> vorbis (libvorbis))
Press [q] to stop, [?] for help
frame= 10 fps=0.8 q=0.0 Lsize= 240kB time=00:00:00.36 bitrate=5456.9kbits/s speed=0.0284x
video:236kB audio:0kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 2.017218%
vp9 / opus: कोई ध्वनि और वीडियो बहुत तेज़ नहीं चलता है, कभी-कभी ffmpeg हैंग हो जाता है, छोड़ नहीं सकता
ffmpeg -y -f avfoundation -capture_cursor 1 -framerate 30 -r 30 -i 1:0 -c:v libvpx-vp9 -c:a libopus -crf 10 -b:v 1M -b:a 128K capture.webm
कोई आउटपुट नहीं, हार्ड निकास ctrl+ का उपयोग करके c।
mp4: खराब ऑडियो क्वालिटी, यह बहुत ज्यादा सीपीयू को डगमगाता है
ffmpeg -y -f avfoundation -capture_cursor 1 -video_size 720x480 -framerate 25 -i 1:0 -vsync 2 -preset slow -crf 22 -c:v libx264 -c:a aac -b:v 1M -b:a 128K capture.mp4
उत्पादन:
ffmpeg version N-82977-g8fd3e02-tessus Copyright (c) 2000-2016 the FFmpeg developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzmq --enable-version3 --disable-ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
libavutil 55. 43.100 / 55. 43.100
libavcodec 57. 70.100 / 57. 70.100
libavformat 57. 61.100 / 57. 61.100
libavdevice 57. 2.100 / 57. 2.100
libavfilter 6. 68.100 / 6. 68.100
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
[avfoundation @ 0x7ff6c9800000] Selected pixel format (yuv420p) is not supported by the input device.
[avfoundation @ 0x7ff6c9800000] Supported pixel formats:
[avfoundation @ 0x7ff6c9800000] uyvy422
[avfoundation @ 0x7ff6c9800000] yuyv422
[avfoundation @ 0x7ff6c9800000] nv12
[avfoundation @ 0x7ff6c9800000] 0rgb
[avfoundation @ 0x7ff6c9800000] bgr0
[avfoundation @ 0x7ff6c9800000] Overriding selected pixel format to use uyvy422 instead.
[avfoundation @ 0x7ff6c9800000] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, avfoundation, from '1:0':
Duration: N/A, start: 27439.487000, bitrate: 2822 kb/s
Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 2560x1600, 1000k tbr, 1000k tbn, 1000k tbc
Stream #0:1: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s
No pixel format specified, yuv422p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x7ff6c9839600] MB rate (16000000000) > level limit (2073600)
[libx264 @ 0x7ff6c9839600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7ff6c9839600] profile High 4:2:2, level 5.2, 4:2:2 8-bit
[libx264 @ 0x7ff6c9839600] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=22.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'capture.mp4':
Metadata:
encoder : Lavf57.61.100
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv422p, 2560x1600, q=-1--1, 1000 kb/s, 1000k fps, 1000k tbn, 1000k tbc
Metadata:
encoder : Lavc57.70.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/1000000 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc57.70.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (pcm_f32le (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 158 fps= 13 q=-1.0 Lsize= 1244kB time=00:00:09.66 bitrate=1054.7kbits/s speed=0.796x
video:1200kB audio:39kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.466263%
[libx264 @ 0x7ff6c9839600] frame I:1 Avg QP:18.97 size:338028
[libx264 @ 0x7ff6c9839600] frame P:49 Avg QP:20.98 size: 15709
[libx264 @ 0x7ff6c9839600] frame B:108 Avg QP:25.01 size: 1112
[libx264 @ 0x7ff6c9839600] consecutive B-frames: 5.1% 8.9% 7.6% 78.5%
[libx264 @ 0x7ff6c9839600] mb I I16..4: 21.7% 41.3% 37.0%
[libx264 @ 0x7ff6c9839600] mb P I16..4: 0.4% 0.3% 0.6% P16..4: 4.8% 0.6% 0.7% 0.0% 0.0% skip:92.6%
[libx264 @ 0x7ff6c9839600] mb B I16..4: 0.1% 0.1% 0.0% B16..8: 2.9% 0.2% 0.1% direct: 0.0% skip:96.7% L0:49.7% L1:49.5% BI: 0.8%
[libx264 @ 0x7ff6c9839600] 8x8 transform intra:35.8% inter:23.9%
[libx264 @ 0x7ff6c9839600] direct mvs spatial:96.3% temporal:3.7%
[libx264 @ 0x7ff6c9839600] coded y,uvDC,uvAC intra: 30.5% 38.8% 34.6% inter: 0.3% 1.3% 0.4%
[libx264 @ 0x7ff6c9839600] i16 v,h,dc,p: 53% 43% 3% 1%
[libx264 @ 0x7ff6c9839600] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 57% 5% 33% 1% 1% 1% 1% 1% 2%
[libx264 @ 0x7ff6c9839600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 19% 14% 4% 5% 5% 4% 6% 7%
[libx264 @ 0x7ff6c9839600] i8c dc,h,v,p: 65% 14% 17% 3%
[libx264 @ 0x7ff6c9839600] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7ff6c9839600] ref P L0: 70.4% 2.2% 17.0% 6.3% 3.5% 0.7%
[libx264 @ 0x7ff6c9839600] ref B L0: 65.0% 22.6% 7.2% 5.1%
[libx264 @ 0x7ff6c9839600] ref B L1: 90.2% 9.8%
[libx264 @ 0x7ff6c9839600] kb/s:1014.78
[aac @ 0x7ff6ca809e00] Qavg: 581.188
Exiting normally, received signal 15.
मैं जानना चाहूंगा कि क्या मुझे कोई महत्वपूर्ण विकल्प याद आ रहा है जो वीडियो को खेलने योग्य बना देगा या यदि यह ffmpeg में बग है।
इन विकल्पों के साथ कोशिश की, वीडियो बहुत अच्छा लग रहा है, लेकिन कोई ऑडियो नहीं:
—
demian85
ffmpeg -y -f avfoundation -capture_cursor 1 -i 1:0 -r 30000/1001 -s 1280x800 -vsync 2 -c:v libvpx-vp9 -c:a libopus -b:v 1M -b:a 128K capture.webm ffmpeg -y -f avfoundation -capture_cursor 1 -i 1:0 -r 30000/1001 -s 1280x800 -vsync 2 -c:v libvpx -c:a libvorbis -b:v 1M -b:a 128K capture.webm ऑडियो अभी भी इस आदेश के साथ stutters: ffmpeg -y -f avfoundation -capture_cursor 1 -i 1:0 -r 30000/1001 -s 1280x800 -movflags faststart -vsync 2 -preset fast -crf 22 -c:v libx264 -c:a aac -b:a 128K capture.mp4
केवल ऑडियो को vorbis, opus या aac / mp4 के साथ रिकॉर्ड करना ठीक काम करता है, समस्या वीडियो और ऑडियो एक साथ है।
—
demian85
ऑडियो को एक अलग इनपुट के रूप में खिलाने की कोशिश करें
—
ज्ञान
ffmpeg -y -f avfoundation -capture_cursor 1 -i 1:none -f avfoundation -i none:0
अभी भी वही समस्या है :(
—
demian85
-rआउटपुट विकल्प के रूप में उपयोग करें । उपयोग-vsync 1ऑडियो भाग अजीब है। वीपी 8 और एमपी 3 के साथ एमकेवी को सहेजें और जांचें।