編輯：
我有點想通了，問題需要處理 apache mpm 事件......當我在第一個客戶端上發送我的請求時，我的腳本正在線性執行。當我從第二個客戶端發送我的請求時，他實際上是從當前最后一個請求所在的代碼點開始。所以這可能是這些執行緒之間共享記憶體的問題，但我不是 apache 專業人員，也許有人有想法？
我之前使用過 apache mpm prefork，所以每個請求都有自己的行程和自己的記憶體等，但是使用那個讀取 jpg 檔案時出現問題，并且在我將 apache 更改為 mpm 事件后它起作用了，請參閱以下內容：https：/ /github.com/python-pillow/Pillow/issues/5834#issue-comment-box
在我的 VM 中（使用 mpm 事件運行相同的 apache 版本）一切正常。
我有一個 python 腳本，在 apache2 網路服務器上通過 wsgi 運行燒瓶。在該腳本中，我得到了以下幾行 (458-461)：
video_stream = ffmpeg.input(pathToVideo)
audio_file = ffmpeg.input(pathToAudio)
ffmpeg.concat(video_stream, audio_file, v=1, a=1).output(
pathToOutVid).run()
因此，該代碼段通過單擊按鈕成功地將我的視頻和音頻檔案組合到一個新的視頻檔案中。當我從2 個客戶端訪問網頁并啟動該腳本時，我的問題就開始了。兩者都有不同的輸入音視頻檔案和不同的輸出檔案，但是當它們同時運行時，其中一個通過成功，另一個客戶端出現以下錯誤：
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
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
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/path/to/movie.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.83.100
Duration: 00:00:11.50, start: 0.000000, bitrate: 1053 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 1050 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Input #1, mp3, from '/path/to/audio.mp3':
Metadata:
encoder : Lavf57.83.100
Duration: 00:00:11.55, start: 0.025057, bitrate: 128 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc57.10
Stream mapping:
Stream #0:0 (h264) -> concat:in0:v0
Stream #1:0 (mp3) -> concat:in0:a0
concat:out:a0 -> Stream #0:0 (aac)
concat:out:v0 -> Stream #0:1 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x56011ee5cbc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
Error initializing output stream 0:1 -- Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height
[aac @ 0x56011ee5b260] Qavg: -nan
Conversion failed!
但是在沒有另一個并行的情況下在同一客戶端上執行該部分也可以使用以下輸出正常作業：
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
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
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/path/to/movie.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.83.100
Duration: 00:00:11.50, start: 0.000000, bitrate: 1053 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 1050 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Input #1, mp3, from '/path/to/audio.mp3':
Metadata:
encoder : Lavf57.83.100
Duration: 00:00:11.55, start: 0.025057, bitrate: 128 kb/s
Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Metadata:
encoder : Lavc57.10
Stream mapping:
Stream #0:0 (h264) -> concat:in0:v0
Stream #1:0 (mp3) -> concat:in0:a0
concat:out:a0 -> Stream #0:0 (aac)
concat:out:v0 -> Stream #0:1 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x55ae2ada7bc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x55ae2ada7bc0] profile High, level 4.0
[libx264 @ 0x55ae2ada7bc0] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=9 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=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/path/to/movie-WITH-AUDIO.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.83.100
Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
encoder : Lavc57.107.100 aac
Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
encoder : Lavc57.107.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame= 42 fps=0.0 q=0.0 size= 0kB time=00:00:01.34 bitrate= 0.0kbits/s speed=2.68x
frame= 46 fps= 39 q=0.0 size= 0kB time=00:00:01.48 bitrate= 0.0kbits/s speed=1.25x
frame= 57 fps= 34 q=29.0 size= 0kB time=00:00:01.85 bitrate= 0.2kbits/s speed= 1.1x
frame= 70 fps= 30 q=29.0 size= 0kB time=00:00:02.25 bitrate= 0.2kbits/s speed=0.966x
frame= 82 fps= 28 q=29.0 size= 256kB time=00:00:02.69 bitrate= 778.7kbits/s speed=0.927x
frame= 92 fps= 26 q=29.0 size= 256kB time=00:00:03.01 bitrate= 694.9kbits/s speed=0.868x
frame= 102 fps= 25 q=29.0 size= 256kB time=00:00:03.34 bitrate= 627.3kbits/s speed=0.831x
frame= 114 fps= 25 q=29.0 size= 512kB time=00:00:03.71 bitrate=1129.1kbits/s speed=0.81x
frame= 134 fps= 26 q=29.0 size= 512kB time=00:00:04.41 bitrate= 950.8kbits/s speed=0.864x
frame= 152 fps= 27 q=29.0 size= 512kB time=00:00:05.01 bitrate= 836.3kbits/s speed=0.886x
frame= 169 fps= 27 q=29.0 size= 512kB time=00:00:05.59 bitrate= 749.6kbits/s speed=0.902x
frame= 189 fps= 28 q=29.0 size= 512kB time=00:00:06.22 bitrate= 674.1kbits/s speed=0.927x
frame= 203 fps= 28 q=29.0 size= 768kB time=00:00:06.71 bitrate= 937.6kbits/s speed=0.912x
frame= 215 fps= 27 q=29.0 size= 1024kB time=00:00:07.10 bitrate=1180.7kbits/s speed=0.885x
frame= 240 fps= 28 q=29.0 size= 1024kB time=00:00:07.94 bitrate=1056.4kbits/s speed=0.921x
frame= 258 fps= 28 q=29.0 size= 1024kB time=00:00:08.52 bitrate= 984.4kbits/s speed=0.934x
frame= 281 fps= 29 q=29.0 size= 1024kB time=00:00:09.28 bitrate= 903.2kbits/s speed=0.965x
frame= 302 fps= 30 q=29.0 size= 1024kB time=00:00:09.98 bitrate= 840.2kbits/s speed=0.984x
frame= 318 fps= 30 q=29.0 size= 1280kB time=00:00:10.54 bitrate= 994.7kbits/s speed=0.989x
frame= 335 fps= 30 q=29.0 size= 1280kB time=00:00:11.12 bitrate= 942.8kbits/s speed=0.989x
frame= 345 fps= 27 q=-1.0 Lsize= 1765kB time=00:00:11.51 bitrate=1255.3kbits/s speed=0.887x
video:1569kB audio:183kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.768725%
[aac @ 0x55ae2ada6260] Qavg: 1450.385
[libx264 @ 0x55ae2ada7bc0] frame I:2 Avg QP:11.26 size: 96372
[libx264 @ 0x55ae2ada7bc0] frame P:99 Avg QP:18.02 size: 11184
[libx264 @ 0x55ae2ada7bc0] frame B:244 Avg QP:17.15 size: 1253
[libx264 @ 0x55ae2ada7bc0] consecutive B-frames: 2.6% 8.1% 3.5% 85.8%
[libx264 @ 0x55ae2ada7bc0] mb I I16..4: 54.0% 36.8% 9.2%
[libx264 @ 0x55ae2ada7bc0] mb P I16..4: 1.7% 8.2% 0.2% P16..4: 16.8% 2.9% 2.6% 0.0% 0.0% skip:67.7%
[libx264 @ 0x55ae2ada7bc0] mb B I16..4: 0.3% 0.3% 0.0% B16..8: 8.1% 0.2% 0.1% direct: 1.8% skip:89.2% L0:35.2% L1:62.5% BI: 2.3%
[libx264 @ 0x55ae2ada7bc0] 8x8 transform intra:71.5% inter:83.8%
[libx264 @ 0x55ae2ada7bc0] coded y,uvDC,uvAC intra: 18.8% 23.1% 7.1% inter: 2.4% 6.6% 0.1%
[libx264 @ 0x55ae2ada7bc0] i16 v,h,dc,p: 62% 22% 7% 8%
[libx264 @ 0x55ae2ada7bc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 16% 41% 1% 1% 1% 2% 1% 2%
[libx264 @ 0x55ae2ada7bc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 25% 12% 6% 8% 6% 11% 6% 8%
[libx264 @ 0x55ae2ada7bc0] i8c dc,h,v,p: 72% 14% 12% 1%
[libx264 @ 0x55ae2ada7bc0] Weighted P-Frames: Y:53.5% UV:48.5%
[libx264 @ 0x55ae2ada7bc0] ref P L0: 75.9% 11.4% 10.0% 2.4% 0.3%
[libx264 @ 0x55ae2ada7bc0] ref B L0: 89.7% 9.5% 0.8%
[libx264 @ 0x55ae2ada7bc0] ref B L1: 97.9% 2.1%
[libx264 @ 0x55ae2ada7bc0] kb/s:1117.06
I tried to reproduce this error inside my virtual machine running the same Ubuntu 18.04 version, same apache version with mpm event, same python version, same ffmpeg-python version and ffmpeg version, but on my localhost VM everything is working without any problems. Now I need help because I have no idea why this encoder cannot be opened (when another is currently using it? - but no problem on my VM?)
In case it helps, I'm also using opencv and got the following part using the h264 encoder:
video = cv.VideoWriter(output, cv.VideoWriter_fourcc('a', 'v', 'c', '1'), 30, 1920, 1080))
The part of the program where this video is written usually takes very long, if that knowledge helps, but there are no problems with the encoder when multiple clients use it at this point.
I really hope somebody can help me and I appreciate the time you are investing for me, thanks for that!
If I forgot to send something or I need to give more detailed information or anything, just text me :)
Versions
- Ubuntu 18.04 LTS
- Apache/2.4.29
- ffmpeg version 3.4.8-0ubuntu0.2
- Python 3.6.9
- Flask 2.0.2
- opencv 3.4.1
- ffmpeg-python 0.2.0
uj5u.com熱心網友回復：
好吧，為了上帝的愛，我完成了……需要 4 天的時間才能找出答案，我激活了 apache mod（fcgid），它實際上將您的代碼的每一行都分配給了一個執行緒……所以我停用了那個，現在它的作業沒有任何問題......
簡而言之 - 我做了什么：
a2dismod fcgid
systemctl restart apache2
現在它的作業。
THX到@Rotem對他的幫助！對不起那個奇怪的問題和我自己的愚蠢......
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