July 2019 - ffmpeg-user - lists.ffmpeg.org

ffmpeg convert mp3 to opus codec (contained in ogg format)?
by Robert Keir 18 Jul '19

18 Jul '19

Hi There, I need to convert an MP3 to OGG (opus codec). I need to execute this (below) in PHP. ffmpeg -i filename.mp3 c:a libopus newfilename.ogg Is this correct? Can you please let me know. Thanks, Rob

5 12

Problem with signbit()
by Ulf Zibis 18 Jul '19

18 Jul '19

Von meinem Seibert gesendet Hi, $ gcc --version gcc (Ubuntu 7.4.0-1ubuntu1~18.04.1) 7.4.0 Given this code snippet: float a = 0.0F; float b = -0.0F; printf("a: %f, signbit(a): %d\n", a, signbit(a)); printf("b: %f, signbit(b): %d\n", b, signbit(b)); Result: a: 0.000000, signbit(a): 0 b: -0.000000, signbit(b): 0 I would expect: a: 0.000000, signbit(a): 0 b: -0.000000, signbit(b): <something not 0> ... according to: http://man7.org/linux/man-pages/man3/signbit.3.html Are there some flags in the your build script which cause this problem? If I compile the code without FFmpeg build script, but with standard configuration, I get the expected result. -Ulf

3 3

ffmpeg build failure on Mac
by Steve Saunders 18 Jul '19

18 Jul '19

" steve$ ./configure --extra-ldflags=-L"$(pwd)/../libvpx/build" --extra-cflags=-I"$(pwd)/../libvpx/build" --enable-libvpx nasm/yasm not found or too old. Use --disable-x86asm for a crippled build. If you think configure made a mistake, make sure you are using the latest version from Git. If the latest version fails, report the problem to the ffmpeg-user(a)ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net. Include the log file "ffbuild/config.log" produced by configure as this will help solve the problem. “ As part of the following recipe to get a ffmpeg/libvpx install that supports VP9 HDR Profile 2: git clone https://chromium.googlesource.com/webm/libvpx <https://chromium.googlesource.com/webm/libvpx> cd libvpx mkdir -p build cd build ../configure --enable-vp9-highbitdepth make -j16 cd ../.. git clone https://git.ffmpeg.org/ffmpeg.git <https://git.ffmpeg.org/ffmpeg.git> cd ffmpeg ./configure --extra-ldflags=-L"$(pwd)/../libvpx/build" --extra-cflags=-I"$(pwd)/../libvpx/build" --enable-libvpx make -j16 Here is the requested ffbuild log:

2 1

cutting mts(h264+ac3) with least possible transcoding
by Henning Thielemann 17 Jul '19

17 Jul '19

I want to cut a video with optimally no recoding, or only a bit of recoding at the beginning and the end, or if recoding is necessary, only for the audio track. I tried this: $ ffmpeg -ss 00:02 -i 00078.MTS -vcodec copy -acodec ac3 -b:a 256k cut.mts However, cut.mts contains only audio, no video anymore: $ ffmpeg -i cut.mts ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609 configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --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-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --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-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv libavutil 54. 31.100 / 54. 31.100 libavcodec 56. 60.100 / 56. 60.100 libavformat 56. 40.101 / 56. 40.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 40.101 / 5. 40.101 libavresample 2. 1. 0 / 2. 1. 0 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 2.101 / 1. 2.101 libpostproc 53. 3.100 / 53. 3.100 [h264 @ 0x1087c40] start time for stream 0 is not set in estimate_timings_from_pts [mpegts @ 0x10837a0] Could not find codec parameters for stream 0 (Video: h264 ([27][0][0][0] / 0x001B), none): unspecified size Consider increasing the value for the 'analyzeduration' and 'probesize' options Input #0, mpegts, from '/tmp/cut.mts': Duration: 00:00:04.26, start: 1.400000, bitrate: 297 kb/s Program 1 Metadata: service_name : Service01 service_provider: FFmpeg Stream #0:0[0x100]: Video: h264 ([27][0][0][0] / 0x001B), none, 90k tbr, 90k tbn, 180k tbc Stream #0:1[0x101]: Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 256 kb/s At least one output file must be specified Is this a bug or am I doing something wrong? You can find my small test video here: http://sim.mathematik.uni-halle.de/~henning/video/00078.MTS

2 3

Video jumps after segmenting, transcoding, and rejoining video
by Paul Cruickshank 17 Jul '19

17 Jul '19

Hi, We're working on a project to have a highly parallelized video rescaling pipeline but we're finding that small audio and video jumps are being introduced into the video when we put the video back together. Can anyone point out anything we're doing wrong? The pipeline has 3 stages. First we split the video using the segment muxer $ ./ffmpeg -i samples/2160p-h264-aac-20mbs-2m.mp4 -muxdelay 0 -muxpreload 0 -g 96 -keyint_min 96 -sc_threshold 0 -c copy -copyts -f segment -fflags +genpts -segment_time 4 -segment_format mpegts out/segments/%04d.ts Then we change the scale for each of the segments using: $ ./ffmpeg -i out/segments/0000.ts -muxdelay 0 -vf scale=1920:1080 -c:v libx264 -profile:v main -c:a aac -copyts out/segments/out00.ts And then we rejoin $ ./ffmpeg -i "concat:out/segments/out00.ts|out/segments/out01.ts|out/segments/out02.ts" -c copy -copyts out/transcoded.mp4 The jumps seem to correlate to the segment boundaries. The jumps are even worse if we have to change audio codec from ac3 to aac in the middle transcode stage. It we skip the middle rescaling stage then we don't get any jumps in the output video so it's something that's going wrong in that command. For reference the commands are using ffmpeg 4.1.3 and the video I tested the commands with http://downloads.4ksamples.com/videos/PUPPIES%20BATH%20IN%204K%20(ULTRA%20H… Thanks, Paul

3 2

FFMpeg User preset
by Weng Kien Chan 17 Jul '19

17 Jul '19

Hi, Is there a way for my to input my mxf file and grab the meeting to create a user preset? Currently, the wizard can only allow video passthru but not audio. I would like to have a preset base on my approve mxd file. Thank you Chan

1 0

PSNR for lossless JPEG2000 doesn't match
by Elliott Balsley 16 Jul '19

16 Jul '19

Hello. I’m trying to encode a v210 AVI to lossless JPEG2000. I believe libopenjpeg defaults to the lossless profile. When I use -psnr while encoding, it shows inf, that’s good. But when I run -filter_complex psnr on the encoded file it shows different values. From the documentation, I know the output of the psnr filter averages the MSE of all frames. I don’t know how the -psnr flag works, is that also an average, or is just showing the PSNR of one frame? Full command-line output below, first from the encode, then from the comparison. D:\temp>ffmpeg -i 1920x1080p23.97_YUV422_Legal_60s.avi -c:v libopenjpeg -psnr -an openjpeg.mxf ffmpeg version N-94303-g7cb4f8c962 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.1.1 (GCC) 20190716 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 30.100 / 56. 30.100 libavcodec 58. 53.101 / 58. 53.101 libavformat 58. 28.102 / 58. 28.102 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 56.101 / 7. 56.101 libswscale 5. 4.101 / 5. 4.101 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 [avi @ 0000018978058c80] non-interleaved AVI [avi @ 0000018978058c80] Stream #0: not enough frames to estimate rate; consider increasing probesize Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, avi, from '1920x1080p23.97_YUV422_Legal_60s.avi': Duration: 00:01:00.06, start: 0.000000, bitrate: 1063058 kb/s Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le, 1920x1080, 1061360 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc Stream #0:1: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s Stream mapping: Stream #0:0 -> #0:0 (v210 (native) -> jpeg2000 (libopenjpeg)) Press [q] to stop, [?] for help [mxf @ 000001897805a1c0] 417083/10000000 input time base matched 1001/24000 container time base Output #0, mxf, to 'openjpeg.mxf': Metadata: encoder : Lavf58.28.102 Stream #0:0: Video: jpeg2000 (libopenjpeg), yuv422p10le, 1920x1080, q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc Metadata: encoder : Lavc58.53.101 libopenjpeg frame= 1440 fps=6.8 q=-0.0 LPSNR=Y:inf U:inf V:inf *:inf size= 2861957kB time=00:01:00.06 bitrate=390362.1kbits/s speed=0.285x video:2860792kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.040706% D:\temp>ffmpeg -i 1920x1080p23.97_YUV422_Legal_60s.avi -i openjpeg.mxf -an -filter_complex "psnr" -f null - ffmpeg version N-94303-g7cb4f8c962 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.1.1 (GCC) 20190716 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 30.100 / 56. 30.100 libavcodec 58. 53.101 / 58. 53.101 libavformat 58. 28.102 / 58. 28.102 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 56.101 / 7. 56.101 libswscale 5. 4.101 / 5. 4.101 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 [avi @ 0000022c13af98c0] non-interleaved AVI [avi @ 0000022c13af98c0] Stream #0: not enough frames to estimate rate; consider increasing probesize Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, avi, from '1920x1080p23.97_YUV422_Legal_60s.avi': Duration: 00:01:00.06, start: 0.000000, bitrate: 1063058 kb/s Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le, 1920x1080, 1061360 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc Stream #0:1: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s Input #1, mxf, from 'openjpeg.mxf': Metadata: operational_pattern_ul: 060e2b34.04010101.0d010201.01010900 uid : adab4424-2f25-4dc7-92ff-29bd000c0000 generation_uid : adab4424-2f25-4dc7-92ff-29bd000c0001 company_name : FFmpeg product_name : OP1a Muxer product_version : 58.28.102 product_uid : adab4424-2f25-4dc7-92ff-29bd000c0002 material_package_umid: 0x060A2B340101010501010D001309998F529471341F09998F00529471341F0900 timecode : 00:00:00:00 Duration: 00:01:00.06, start: 0.000000, bitrate: 390362 kb/s Stream #1:0: Video: jpeg2000, yuv422p10le(progressive), 1920x1080, lossless, 23.98 tbr, 23.98 tbn, 23.98 tbc Metadata: file_package_umid: 0x060A2B340101010501010D001309998F529471341F09998F00529471341F0901 Stream mapping: Stream #0:0 (v210) -> psnr:main Stream #1:0 (jpeg2000) -> psnr:reference psnr -> Stream #0:0 (wrapped_avframe) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: encoder : Lavf58.28.102 Stream #0:0: Video: wrapped_avframe, yuv422p10le, 1920x1080, q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default) Metadata: encoder : Lavc58.53.101 wrapped_avframe [null @ 0000022c17ceec40] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 1439 >= 1439 frame= 1441 fps= 19 q=-0.0 Lsize=N/A time=00:01:00.05 bitrate=N/A speed=0.776x video:754kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown [Parsed_psnr_0 @ 0000022c29ab7680] PSNR y:30.477769 u:37.424566 v:37.127359 average:32.663307 min:26.866594 max:inf

2 1

amix: Hard limit for number of inputs?
by Reino Wijnsma 16 Jul '19

16 Jul '19

Hello ffmpeg-user, About 7 years ago I've used Audacity to assemble the soundtrack of the videogame No One Lives Forever 2. See https://www.youtube.com/watch?v=4Y3aKcQ0HK4 for example. The soundtrack comprised of lots of small segments that can all dynamically be loaded by the videogame. A year later I've assembled the soundtrack once more, but this time with Avisynth. See the attached 'SIBERIA.avs' for example. Now I wanted to see if ffmpeg is up for the task. Just for fun. FFmpeg used: ffmpeg version N-94137-g89b9690-Reino Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8.3.0 (GCC) configuration: --arch=x86 --target-os=mingw32 --cross-prefix=/cygdrive/m/ffmpeg-windows-build-helpers-master/ffmpeg_local_builds/sandbox/cross_compilers/mingw-w64-i686/bin/i686-w64-mingw32- --pkg-config=pkg-config --pkg-config-flags=--static --extra-version=Reino --enable-gray --enable-version3 --disable-debug --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-w32threads --enable-avisynth --enable-frei0r --enable-filter=frei0r --enable-gmp --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --extra-cflags=-DCACA_STATIC --enable-libfdk-aac --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenmpt --enable-libopus --enable-librubberband --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --extra-cflags=-DLIBTWOLAME_STATIC --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzvbi --enable-mbedtls --extra-cflags='-march=pentium3' --extra-cflags='-mtune=athlon-xp' --extra-cflags=-O2 --extra-cflags='-mfpmath=sse' --extra-cflags=-msse --enable-static --disable-shared --prefix=/cygdrive/m/ffmpeg-windows-build-helpers-master/ffmpeg_local_builds/sandbox/cross_compilers/mingw-w64-i686/i686-w64-mingw32 libavutil 56. 30.100 / 56. 30.100 libavcodec 58. 53.100 / 58. 53.100 libavformat 58. 28.101 / 58. 28.101 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 55.100 / 7. 55.100 libswscale 5. 4.101 / 5. 4.101 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 The soundtrack contains an "explore", "warning" and "combat" section. I'll do the "explore" section first, which is 'SIBERIAE{1-29}.WAV'. ffmpeg.exe -i SIBERIAE1.WAV -i SIBERIAE2.WAV -i SIBERIAE3.WAV -i SIBERIAE4.WAV -i SIBERIAE5.WAV -i SIBERIAE6.WAV -i SIBERIAE7.WAV -i SIBERIAE8.WAV -i SIBERIAE9.WAV -i SIBERIAE10.WAV -i SIBERIAE11.WAV -i SIBERIAE12.WAV -i SIBERIAE13.WAV -i SIBERIAE14.WAV -i SIBERIAE15.WAV -i SIBERIAE16.WAV -i SIBERIAE17.WAV -i SIBERIAE18.WAV -i SIBERIAE19.WAV -i SIBERIAE20.WAV -i SIBERIAE21.WAV -i SIBERIAE22.WAV -i SIBERIAE23.WAV -i SIBERIAE24.WAV -i SIBERIAE25.WAV -i SIBERIAE26.WAV -i SIBERIAE27.WAV -i SIBERIAE28.WAV -i SIBERIAE29.WAV -filter_complex "[1]adelay=158792S|158792S[E2];[2]adelay=291139S|291139S[E3];[3]adelay=423476S|423476S[E4];[4]adelay=555820S|555820S[E5];[5]adelay=714633S|714633S[E6];[6]adelay=873439S|873439S[E7];[7]adelay=1058736S|1058736S[E8];[8]adelay=1244019S|1244019S[E9];[9]adelay=1376339S|1376339S[E10];[10]adelay=1508682S|1508682S[E11];[11]adelay=1667496S|1667496S[E12];[12]adelay=1826306S|1826306S[E13];[13]adelay=1932181S|1932181S[E14];[14]adelay=2118076S|2118076S[E15];[15]adelay=2255399S|2255399S[E16];[16]adelay=2364348S|2364348S[E17];[17]adelay=2499655S|2499655S[E18];[18]adelay=2587883S|2587883S[E19];[19]adelay=2720226S|2720226S[E20];[20]adelay=2852568S|2852568S[E21];[21]adelay=2984913S|2984913S[E22];[22]adelay=3073138S|3073138S[E23];[23]adelay=3161367S|3161367S[E24];[24]adelay=3249594S|3249594S[E25];[25]adelay=3336742S|3336742S[E26];[26]adelay=3421112S|3421112S[E27];[27]adelay=3576621S|3576621S[E28];[28]adelay=3788369S|3788369S[E29];[0][E2][E3][E4][E5][E6][E7][E8][E9][E10][E11][E12][E13][E14][E15][E16][E17][E18][E19][E20][E21][E22][E23][E24][E25][E26][E27][E28][E29]amix=inputs=29" -f null NUL Input #0, wav, from 'SIBERIAE1.WAV': Duration: 00:00:09.64, bitrate: 127 kb/s Stream #0:0: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, fltp, 128 kb/s [...] Input #28, wav, from 'SIBERIAE29.WAV': Duration: 00:00:04.83, bitrate: 127 kb/s Stream #28:0: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, fltp, 128 kb/s Stream mapping: Stream #0:0 (mp3float) -> amix:input0 Stream #1:0 (mp3float) -> adelay [...] Stream #28:0 (mp3float) -> adelay amix -> Stream #0:0 (pcm_s16le) Press [q] to stop, [?] for help Output #0, null, to 'NUL': Metadata: encoder : Lavf58.28.101 Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s (default) Metadata: encoder : Lavc58.53.100 pcm_s16le size=N/A time=00:01:30.74 bitrate=N/A speed=26.3x video:0kB audio:15632kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown (as you can see the segments are actually mp3 disguised as wav) With this command I'd first like to know the duration; 00:01:30.74. Next I'll use this for the "dropout_transition" parameter and do a "volumedetect": ffmpeg.exe [...]amix=inputs=29:dropout_transition=90.74,volumedetect" -f null NUL [...] [Parsed_volumedetect_29 @ 055e98c0] n_samples: 8003418 [Parsed_volumedetect_29 @ 055e98c0] mean_volume: -62.2 dB [Parsed_volumedetect_29 @ 055e98c0] max_volume: -39.8 dB [Parsed_volumedetect_29 @ 055e98c0] histogram_39db: 3 [Parsed_volumedetect_29 @ 055e98c0] histogram_40db: 14 [Parsed_volumedetect_29 @ 055e98c0] histogram_41db: 33 [Parsed_volumedetect_29 @ 055e98c0] histogram_42db: 75 [Parsed_volumedetect_29 @ 055e98c0] histogram_43db: 163 [Parsed_volumedetect_29 @ 055e98c0] histogram_44db: 331 [Parsed_volumedetect_29 @ 055e98c0] histogram_45db: 985 [Parsed_volumedetect_29 @ 055e98c0] histogram_46db: 2395 [Parsed_volumedetect_29 @ 055e98c0] histogram_47db: 4637 Finally I crank up the volume with the "max_volume" result and pipe or write/encode the endresult: ffmpeg.exe [...]amix=inputs=29:dropout_transition=90.74,volume=39.8" -f wav - So far so good. Now for the entire Siberia soundtrack. The "explore" section was 29 inputs. The entire Siberia soundtrack is 79 inputs. ffmpeg.exe -i SIBERIAE1.WAV -i SIBERIAE2.WAV -i SIBERIAE3.WAV -i SIBERIAE4.WAV -i SIBERIAE5.WAV -i SIBERIAE6.WAV -i SIBERIAE7.WAV -i SIBERIAE8.WAV -i SIBERIAE9.WAV -i SIBERIAE10.WAV -i SIBERIAE11.WAV -i SIBERIAE12.WAV -i SIBERIAE13.WAV -i SIBERIAE14.WAV -i SIBERIAE15.WAV -i SIBERIAE16.WAV -i SIBERIAE17.WAV -i SIBERIAE18.WAV -i SIBERIAE19.WAV -i SIBERIAE20.WAV -i SIBERIAE21.WAV -i SIBERIAE22.WAV -i SIBERIAE23.WAV -i SIBERIAE24.WAV -i SIBERIAE25.WAV -i SIBERIAE26.WAV -i SIBERIAE27.WAV -i SIBERIAE28.WAV -i SIBERIAE29.WAV -i TRANSEWSTR100.WAV -i SIBERIAW1.WAV -i SIBERIAW2.WAV -i SIBERIAW3.WAV -i SIBERIAW4.WAV -i SIBERIAW5.WAV -i SIBERIAW6.WAV -i SIBERIAW7.WAV -i SIBERIAW8.WAV -i SIBERIAW9.WAV -i SIBERIAW10.WAV -i SIBERIAW11.WAV -i SIBERIAW12.WAV -i SIBERIAW13.WAV -i SIBERIAW14.WAV -i SIBERIAW15.WAV -i SIBERIAW16.WAV -i SIBERIAW17.WAV -i SIBERIAW18.WAV -i SIBERIAW19.WAV -i SIBERIAW20.WAV -i SIBERIAW21.WAV -i SIBERIAW22.WAV -i TRANSWE19.WAV -i SIBERIAC1.WAV -i SIBERIAC2.WAV -i SIBERIAC3.WAV -i SIBERIAC4.WAV -i SIBERIAC5.WAV -i SIBERIAC6.WAV -i SIBERIAC7.WAV -i SIBERIAC8.WAV -i SIBERIAC9.WAV -i SIBERIAC10.WAV -i SIBERIAC11.WAV -i SIBERIAC12.WAV -i SIBERIAC13.WAV -i SIBERIAC14.WAV -i SIBERIAC15.WAV -i SIBERIAC16.WAV -i SIBERIAC17.WAV -i SIBERIAC18.WAV -i SIBERIAC19.WAV -i SIBERIAC20.WAV -i SIBERIAC21.WAV -i SIBERIAC22.WAV -i SIBERIAC23.WAV -i SIBERIAC24.WAV -i SIBERIAC25.WAV -i TRANSCS21.WAV -filter_complex "[1]adelay=158792S|158792S[E2];[2]adelay=291139S|291139S[E3];[3]adelay=423476S|423476S[E4];[4]adelay=555820S|555820S[E5];[5]adelay=714633S|714633S[E6];[6]adelay=873439S|873439S[E7];[7]adelay=1058736S|1058736S[E8];[8]adelay=1244019S|1244019S[E9];[9]adelay=1376339S|1376339S[E10];[10]adelay=1508682S|1508682S[E11];[11]adelay=1667496S|1667496S[E12];[12]adelay=1826306S|1826306S[E13];[13]adelay=1932181S|1932181S[E14];[14]adelay=2118076S|2118076S[E15];[15]adelay=2255399S|2255399S[E16];[16]adelay=2364348S|2364348S[E17];[17]adelay=2499655S|2499655S[E18];[18]adelay=2587883S|2587883S[E19];[19]adelay=2720226S|2720226S[E20];[20]adelay=2852568S|2852568S[E21];[21]adelay=2984913S|2984913S[E22];[22]adelay=3073138S|3073138S[E23];[23]adelay=3161367S|3161367S[E24];[24]adelay=3249594S|3249594S[E25];[25]adelay=3336742S|3336742S[E26];[26]adelay=3421112S|3421112S[E27];[27]adelay=3576621S|3576621S[E28];[28]adelay=3788369S|3788369S[E29];[29]adelay=3787479|3787479S[EW100];[30]adelay=3841308S|3841308S[W1];[31]adelay=4089467S|4089467S[W2];[32]adelay=4337597S|4337597S[W3];[33]adelay=4585740S|4585740S[W4];[34]adelay=4751180S|4751180S[W5];[35]adelay=4916595S|4916595S[W6];[36]adelay=5040665S|5040665S[W7];[37]adelay=5206096S|5206096S[W8];[38]adelay=5309485S|5309485S[W9];[39]adelay=5412881S|5412881S[W10];[40]adelay=5516287S|5516287S[W11];[41]adelay=5619668S|5619668S[W12];[42]adelay=5785089S|5785089S[W13];[43]adelay=5950523S|5950523S[W14];[44]adelay=6033235S|6033235S[W15];[45]adelay=6198660S|6198660S[W16];[46]adelay=6364091S|6364091S[W17];[47]adelay=6446814S|6446814S[W18];[48]adelay=6598676S|6598676S[W19];[49]adelay=6722118S|6722118S[W20];[50]adelay=6872561S|6872561S[W21];[51]adelay=7038663S|7038663S[W22];[52]adelay=7204260S|7204260S[WE19];[53]adelay=7286129S|7286129S[C1];[54]adelay=7534279S|7534279S[C2];[55]adelay=7783363S|7783363S[C3];[56]adelay=8030562S|8030562S[C4];[57]adelay=8195988S|8195988S[C5];[58]adelay=8361416S|8361416S[C6];[59]adelay=8485486S|8485486S[C7];[60]adelay=8650917S|8650917S[C8];[61]adelay=8754307S|8754307S[C9];[62]adelay=8857700S|8857700S[C10];[63]adelay=8961094S|8961094S[C11];[64]adelay=9064486S|9064486S[C12];[65]adelay=9271272S|9271272S[C13];[66]adelay=9436697S|9436697S[C14];[67]adelay=9519413S|9519413S[C15];[68]adelay=9726192S|9726192S[C16];[69]adelay=9850266S|9850266S[C17];[70]adelay=9932983S|9932983S[C18];[71]adelay=10181124S|10181124S[C19];[72]adelay=10429267S|10429267S[C20];[73]adelay=10677408S|10677408S[C21];[74]adelay=10842834S|10842834S[C22];[75]adelay=10946226S|10946226S[C23];[76]adelay=11049615S|11049615S[C24];[77]adelay=11153012S|11153012S[C25];[78]adelay=11401044S|11401044S[CS21];[0][E2][E3][E4][E5][E6][E7][E8][E9][E10][E11][E12][E13][E14][E15][E16][E17][E18][E19][E20][E21][E22][E23][E24][E25][E26][E27][E28][E29][EW100][W1][W2][W3][W4][W5][W6][W7][W8][W9][W10][W11][W12][W13][W14][W15][W16][W17][W18][W19][W20][W21][W22][WE19][C1][C2][C3][C4][C5][C6][C7][C8][C9][C10][C11][C12][C13][C14][C15][C16][C17][C18][C19][C20][C21][C22][C23][C24][C25][CS21]amix=inputs=79" -f null NUL Input #0, wav, from 'SIBERIAE1.WAV': Duration: 00:00:09.64, bitrate: 127 kb/s Stream #0:0: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, fltp, 128 kb/s [...] Input #78, wav, from 'TRANSCS21.WAV': Duration: 00:00:11.76, bitrate: 127 kb/s Stream #78:0: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, fltp, 128 kb/s Stream mapping: Stream #0:0 (mp3float) -> amix:input0 Stream #1:0 (mp3float) -> adelay [...] Stream #78:0 (mp3float) -> adelay amix -> Stream #0:0 (pcm_s16le) Press [q] to stop, [?] for help Output #0, null, to 'NUL': Metadata: encoder : Lavf58.28.101 Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s (default) Metadata: encoder : Lavc58.53.100 pcm_s16le size=N/A time=01:03:12.31 bitrate=N/A speed= 126x video:0kB audio:653285kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown This is where things go wrong. After having processed time=00:04:00.00 (4 minutes) or so the process speed, as well the alleged time, suddenly go through the roof. It reports a duration of over an hour, while it should've been 00:04:30.67. Is there a limit to the amount of inputs the amix filter can work with, or is there something else going on here? I've uploaded the segments here for testing: https://rwijnsma.home.xs4all.nl/files/temp/SIBERIA.7z Thank you. -- Reino

3 10

Video jumps after segmenting, transcoding, and rejoining video
by Paul Cruickshank 16 Jul '19

16 Jul '19

Hi, We're working on a project to have a highly parallelized video rescaling pipeline but we're finding that small audio and video jumps are being introduced into the video when we put the video back together. Can anyone point out anything we're doing wrong? The pipeline has 3 stages. First we split the video using the segment muxer $ ./ffmpeg -i samples/2160p-h264-aac-20mbs-2m.mp4 -muxdelay 0 -muxpreload 0 -g 96 -keyint_min 96 -sc_threshold 0 -c copy -copyts -f segment -fflags +genpts -segment_time 4 -segment_format mpegts out/segments/%04d.ts Then we change the scale for each of the segments using: $ ./ffmpeg -i out/segments/0000.ts -muxdelay 0 -vf scale=1920:1080 -c:v libx264 -profile:v main -c:a aac -copyts out/segments/out00.ts And then we rejoin $ ./ffmpeg -i "concat:out/segments/out00.ts|out/segments/out01.ts|out/segments/out02.ts" -c copy -copyts out/transcoded.mp4 The jumps seem to correlate to the segment boundaries. The jumps are even worse if we have to change audio codec from ac3 to aac in the middle transcode stage. It we skip the middle rescaling stage then we don't get any jumps in the output video so it's something that's going wrong in that command. For reference the commands are using ffmpeg 4.1.3 and the video I tested the commands with http://downloads.4ksamples.com/videos/PUPPIES%20BATH%20IN%204K%20(ULTRA%20H… Thanks, Paul

1 0

Error psz_cqm_file=8-0-8
by abhishek punjabi 16 Jul '19

16 Jul '19

Dear Sir, I want to use the above parameter for FFmpeg 4.1 Its working fine in FFmpeg 2.6 version but not supported by 4.1 version. Please provide a solution and asap to include parameter in psz_cqm_file=8-0-8. Thanks and Regards *Abhishek Punjabi,* *Contact : +91 8849272165*

3 4