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  • Corrupt frames error while evaluating vmaf

    30 octobre 2020, par Tarun

    I am using ffmpeg with libvmaf support. Attached is the uncut ffmpeg output which will help you with ffmpeg versions and other information. I am facing following error intermittently, also in my case source and encoded videos are stored in s3 bucket and I am inputting them to ffmpeg using s3 presigned HTTP URL.

    


    Reason for URL is, I am running ffmpeg on AWS Batch containers which has storage limits, hence I cant download file on server, and thats why I am using URL

    


    Corrupt input packet in stream 0\n[h264 @ 0x4745e00] Invalid NAL unit size (21976 > 13373).\n[h264 @ 0x4745e00] Error splitting the input into NAL units.


    {"level":"debug","time":"2020-10-29T18:50:05Z","message":"Command err: ffmpeg version N-98384-g3b8d5bcc31 Copyright (c) 2000-2020 the FFmpeg developers\n  built with gcc 8 (Debian 8.3.0-6)\n  configuration: --pkg-config-flags=--static --extra-cflags='-I/usr/local/include -static' --extra-ldflags='-L/usr/local/lib -static' --extra-libs='-lpthread -lm' --disable-shared --enable-static --disable-debug --disable-doc --disable-ffplay --enable-ffprobe --enable-gpl --enable-libfreetype --enable-libvmaf --enable-version3 --enable-libzimg --enable-libopus --enable-libsvthevc --enable-libx264 --enable-libx265\n  libavutil      56. 55.100 / 56. 55.100\n  libavcodec     58. 93.104 / 58. 93.104\n  libavformat    58. 47.100 / 58. 47.100\n  libavdevice    58. 11.100 / 58. 11.100\n  libavfilter     7. 86.100 /  7. 86.100\n  libswscale      5.  8.100 /  5.  8.100\n  libswresample   3.  8.100 /  3.  8.100\n  libpostproc    55.  8.100 / 55.  8.100\nInput #0, mov,mp4,m4a,3gp,3g2,mj2, from 'http://packaged-vod-assets.s3.amazonaws.com/vmaf-compare/155418_1/Bitmovin/mp4/video_1.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=70cee7ad192c375364be2da79c689c6230dba92ff27ca87cbaf250660eaf679a':\n  Metadata:\n    major_brand     : isom\n    minor_version   : 512\n    compatible_brands: isomiso2avc1mp41\n    encoder         : Lavf58.45.100\n  Duration: 00:45:41.00, start: 0.000000, bitrate: 268 kb/s\n    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x360, 266 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)\n    Metadata:\n      handler_name    : VideoHandler\nInput #1, mxf, from 'http://packaged-vod-assets.s3.amazonaws.com/b856b6ff-5f57-4f7a-b62b-2a851cb86eaf/MasterMezzanine.mxf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=1a3314912af2a2eb1558362d346b2498f9e8b00933308eddeb4a31fc8701bee7':\n  Metadata:\n    operational_pattern_ul: 060e2b34.04010101.0d010201.01010900\n    uid             : e54552c8-1ffc-4378-accb-f5c5f12843c7\n    generation_uid  : 0377fe71-cf93-4248-9f55-e6a7d042ff21\n    modification_date: 2020-07-17T19:05:44.524000Z\n    company_name    : Elemental Technologies, Inc\n    product_name    : Server\n    product_version : 2.17.0.602675\n    product_uid     : 060e2b34-0101-0101-0f45-544953657276\n    application_platform: libMXF (Linux 64-bit)\n    material_package_umid: 0x060A2B340101010501010D2013000000E4B5112668944A2EB48B1CA686F0EFDC\n    timecode        : 00:00:00:00\n  Duration: 00:45:41.00, start: 0.000000, bitrate: 35163 kb/s\n    Stream #1:0: Video: mpeg2video (4:2:2), yuv422p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 35000 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc\n    Metadata:\n      file_package_umid: 

rframe=44294 fps= 10 q=-0.0 size=N/A time=00:29:31.76 bitrate=N/A speed=0.42x    \rframe=44302 fps= 10 q=-0.0 size=N/A time=00:29:32.08 bitrate=N/A speed=0.42x    \rframe=44306 fps= 10 q=-0.0 size=N/A time=00:29:32.24 bitrate=N/A speed=0.42x    \rframe=44311 fps= 10 q=-0.0 size=N/A time=00:29:32.44 bitrate=N/A speed=0.42x    \rframe=44315 fps= 10 q=-0.0 size=N/A time=00:29:32.60 bitrate=N/A speed=0.42x    \rframe=44320 fps= 10 q=-0.0 size=N/A time=00:29:32.80 bitrate=N/A speed=0.42x    \rframe=44328 fps= 10 q=-0.0 size=N/A time=00:29:33.12 bitrate=N/A speed=0.42x    \rframe=44336 fps= 10 q=-0.0 size=N/A time=00:29:33.44 bitrate=N/A speed=0.42x    \rframe=44341 fps= 10 q=-0.0 size=N/A time=00:29:33.64 bitrate=N/A speed=0.42x    \rframe=44345 fps= 10 q=-0.0 size=N/A time=00:29:33.80 bitrate=N/A speed=0.42x    \rframe=44350 fps= 10 q=-0.0 size=N/A time=00:29:34.00 bitrate=N/A speed=0.42x    \rframe=44356 fps= 10 q=-0.0 size=N/A time=00:29:34.24 bitrate=N/A speed=0.42x    \rframe=44364 fps= 10 q=-0.0 size=N/A time=00:29:34.56 bitrate=N/A speed=0.42x    \rframe=44369 fps= 10 q=-0.0 size=N/A time=00:29:34.76 bitrate=N/A speed=0.42x    \rframe=44376 fps= 10 q=-0.0 size=N/A time=00:29:35.04 bitrate=N/A speed=0.42x    \rframe=44383 fps= 10 q=-0.0 size=N/A time=00:29:35.32 bitrate=N/A speed=0.42x    \rframe=44386 fps= 10 q=-0.0 size=N/A time=00:29:35.44 bitrate=N/A speed=0.42x    \rframe=44392 fps= 10 q=-0.0 size=N/A time=00:29:35.68 bitrate=N/A speed=0.42x    \rframe=44399 fps= 10 q=-0.0 size=N/A time=00:29:35.96 bitrate=N/A speed=0.42x    \rframe=44404 fps= 10 q=-0.0 size=N/A time=00:29:36.16 bitrate=N/A speed=0.42x    \rframe=44413 fps= 10 q=-0.0 size=N/A time=00:29:36.52 bitrate=N/A speed=0.42x    \rframe=44416 fps= 10 q=-0.0 size=N/A time=00:29:36.64 bitrate=N/A speed=0.42x    \rframe=44420 fps= 10 q=-0.0 size=N/A time=00:29:36.80 bitrate=N/A speed=0.42x    \rframe=44426 fps= 10 q=-0.0 size=N/A time=00:29:37.04 bitrate=N/A speed=0.42x    \r[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3e2af80] Packet corrupt (stream = 0, dts = 160023600).\n[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3e2af80] stream 0, offset 0x36e308b: partial file\nframe=44433 fps= 10 q=-0.0 size=N/A time=00:29:37.32 bitrate=N/A speed=0.42x    \rhttp://packaged-vod-assets.s3.amazonaws.com/vmaf-compare/155418_1/Bitmovin/mp4/video_1.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=70cee7ad192c375364be2da79c689c6230dba92ff27ca87cbaf250660eaf679a: corrupt input packet in stream 0\n[h264 @ 0x4745e00] Invalid NAL unit size (21976 > 13373).\n[h264 @ 0x4745e00] Error splitting the input into NAL units.\nhttp://packaged-vod-assets.s3.amazonaws.com/vmaf-compare/155418_1/Bitmovin/mp4/video_1.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=70cee7ad192c375364be2da79c689c6230dba92ff27ca87cbaf250660eaf679a: Invalid data found when processing input\nframe=44437 fps= 10 q=-0.0 size=N/A time=00:29:37.48 bitrate=N/A speed=0.42x    \rhttp://packaged-vod-assets.s3.amazonaws.com/vmaf-compare/155418_1/Bitmovin/mp4/video_1.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=70cee7ad192c375364be2da79c689c6230dba92ff27ca87cbaf250660eaf679a: Invalid data found when processing input\n    Last message repeated 5 times\nframe=44443 fps= 10 q=-0.0 size=N/A time=00:29:37.72 bitrate=N/A speed=0.42x    \rhttp://packaged-vod-assets.s3.amazonaws.com/vmaf-compare/155418_1/Bitmovin/mp4/video_1.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=70cee7ad192c375364be2da79c689c6230dba92ff27ca87cbaf250660eaf679a: Invalid data found when processing input\n    Last message repeated 7 times\nError while decoding stream #0:0: Invalid data found when processing input\nhttp://packaged-vod-assets.s3.amazonaws.com/vmaf-compare/155418_1/Bitmovin/mp4/video_1.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=70cee7ad192c375364be2da79c689c6230dba92ff27ca87cbaf250660eaf679a: Invalid data found when processing input\n    Last message repeated 1 times\nframe=44452 fps= 10 q=-0.0 size=N/A time=00:29:38.08 bitrate=N/A speed=0.42x    \rhttp://packaged-vod-assets.s3.amazonaws.com/vmaf-compare/155418_1/Bitmovin/mp4/video_1.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAYOHIUN2NFPHIZTO7%2F20201029%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20201029T165637Z&X-Amz-Expires=18000&X-Amz-Security-Token=FwoGZXIvYXdzEAIaDM44L40R8xFOdOiOsSKMBOsKsGIulSEJb56GhTQWhF63T%2F1rRNvb%2Fjxl%2BgKBdWJVctbY18T1FcddIP7GkSO0atB%2FwVUZibLhul3Hvz55ofqmx7gfx6ezW9rYWsdHIvwe1TTP3LME2IzaHULs9ag%2FVTnNxXEYR%2BDkhA8wc2Q936axVDRXgoz5h%2FeusuWF6aRctns%2Bj7BLltZz86Flu%2FdqLp%2F1D3Kq1HdiBvT1eBZ%2B7ibAFLTGAbqAtKT79djwj62aiCYUeqHXtUhz7aM81n09fXBPi0bkc5hlCon%2BdqWE2rkuXfEV47Xc7u6ZuCtBB%2F2SjVpRZMiif4%2Fuz2OaLdEah1SrsWnqWDF75p96WtO7ObbtayoaGcEgWOQ4OxNaQyoDV8B8OveUs%2BNRmSa7vJYFOg0JGfMeBJx8B%2FDe8ED970utUbtp7r4vp1FCwhcDZ0RiSPfvR52dOPMQ6gZ4UaZ9CYcQ1um0vZwqvh2Ij8eveooFEEQoeL5VPwSkrZtFKK5k%2BOqhmce5oFlhHnKxhqeBA5jPxnPyVTQrKlfy7%2BFaqSNUEdNnUodRw8jrnJHUEJ3oB9xxgiWKdtQSQXldnEZxKM%2FbIcCLbZYZlj4t94oDeNiLjhe7sFAtVQ4A93OgQZqBARYp70jfIVmZIszW%2B0ko7PgrrAGqloN4Jf8rdR2abZ9APG2U5QEV0BQt1SkJxuS7YYWpExIFhoe2xpzRKMDo6%2FwFMjefaPrCZ1hL0lfn0UfzdrpdetJCwrF1f4NJ4KKQqS3SR0Vv9pFYH8qRKx1csl6XbUbi41TFxbhz&X-Amz-SignedHeaders=host&X-Amz-Signature=70cee7ad192c375364be2da79c689c6230dba92ff27ca87cbaf250660eaf679a: Invalid data found when processing input\nframe=44457 fps= 10 q=-0.0 size=N/A time=00:29:38.28 bitrate=N/A speed=0.42x    \rframe=44464 fps= 10 q=-0.0 size=N/A time=00:29:38.56 bitrate=N/A speed=0.42x    \rframe=44467 fps= 10 q=-0.0 size=N/A time=00:29:38.68 bitrate=N/A speed=0.42x    \rframe=44478 fps= 10 q=-0.0 size=N/A time=00:29:39.12 bitrate=N/A speed=0.42x    \rframe=44482 fps= 10 q=-0.0 size=N/A time=00:29:39.28 bitrate=N/A speed=0.42x    \rframe=44489 fps= 10 q=-0.0 size=N/A time=00:29:39.56 bitrate=N/A speed=0.42x    \rframe=44495 fps= 10 q=-0.0 size=N/A time=00:29:39.80 bitrate=N/A speed=0.42x    \rframe=44500 fps= 10 q=-0.0 size=N/A time=00:29:40.00 bitrate=N/A speed=0.42x    \rframe=44508 fps= 10 q=-0.0 size=N/A time=00:29:40.32 bitrate=N/A speed=0.42x    \rframe=44513 fps= 10 q=-0.0 size=N/A time=00:29:40.52 bitrate=N/A speed=0.42x    \rframe=44520 fps= 10 q=-0.0 size=N/A time=


    


  • FFMPEG Conversion from GIF to video with audio, take too long

    5 novembre 2020, par Mouaad Abdelghafour AITALI

    I'm trying to convert a GIF file into 720p video and merge it with audio, the code below works fine, but it takes a long time to finish the process (depends on the audio length) :

    


    //Converting from GIF to video is fast!

public static String makeVideo(String inputGifPath, String outputPath, int width, int height) {
        return "-y -i " + inputGifPath + " -movflags faststart -pix_fmt yuv420p -vf crop=" + width + ":" + height + ":0:40,scale=1280:720,setsar=1 " + outputPath;
    }



//Merging video with audio takes a lot of time!

public static String addAudio(String audioNoSpace, String inputVideoPath, String outputVideoPath) {
    return "-stream_loop -1 -i " + inputVideoPath + " -i " + audioNoSpace + " -shortest -map 0:v:0 -map 1:a:0 -y " + outputVideoPath;
}


    


    FFMPEG commands :

    


    -y -i file.gif  -movflags faststart -pix_fmt yuv420p -vf crop=540:250:0:40,scale=1280:720,setsar=1 video.mp4

-stream_loop -1 -i video.mp4 -i  audio.wav -shortest -map 0:v:0 -map 1:a:0 -y final_video.mp4


    


    Part of log :

    


    2020-11-05 19:50:33.092 5721-6212/maa.slowed_reverb W/mobile-ffmpeg: [graph 0 input from stream 0:0 @ 0x70b2dedb00] sws_param option is deprecated and ignored
2020-11-05 19:50:33.112 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: Output #0, mp4, to '/storage/emulated/0/Movies/folder/folder_1604602231893.mp4':
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:   Metadata:
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     major_brand     : 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: isom
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     minor_version   : 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: 512
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     compatible_brands: 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: isomiso2mp41
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     comment         : 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: Optimized with ezgif.com
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     encoder         : 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: Lavf58.48.100
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     Stream #0:0
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: (und)
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: : Video: mpeg4 (mp4v / 0x7634706D), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: , 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: 12.50 fps, 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: 12800 tbn, 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: 12.50 tbc
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:  (default)
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     Metadata:
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:       handler_name    : 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: VideoHandler
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:       encoder         : 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: Lavc58.96.100 mpeg4
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     Side data:
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:       
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: cpb: 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: bitrate max/min/avg: 0/0/200000 buffer size: 0 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: vbv_delay: N/A
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     Stream #0:1
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: : Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:     Metadata:
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg:       encoder         : 
2020-11-05 19:50:33.113 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: Lavc58.96.100 aac
2020-11-05 19:50:33.462 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=   17 fps=0.0 q=4.8 size=       0kB time=00:00:01.28 bitrate=   0.3kbits/s speed=3.27x    
2020-11-05 19:50:33.965 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=   54 fps=0.0 q=28.4 size=     256kB time=00:00:04.24 bitrate= 494.7kbits/s speed=4.74x    
2020-11-05 19:50:34.468 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=   85 fps= 61 q=24.8 size=     512kB time=00:00:06.72 bitrate= 624.2kbits/s speed=4.81x    
2020-11-05 19:50:34.973 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  117 fps= 61 q=31.0 size=     512kB time=00:00:09.28 bitrate= 452.0kbits/s speed=4.88x    
2020-11-05 19:50:35.478 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  150 fps= 62 q=31.0 size=     768kB time=00:00:11.92 bitrate= 527.8kbits/s speed=4.96x    
2020-11-05 19:50:35.976 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  184 fps= 63 q=31.0 size=    1024kB time=00:00:14.64 bitrate= 573.0kbits/s speed=5.04x    
2020-11-05 19:50:36.478 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  217 fps= 64 q=24.8 size=    1024kB time=00:00:17.28 bitrate= 485.5kbits/s speed=5.07x    
2020-11-05 19:50:36.994 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  249 fps= 63 q=31.0 size=    1280kB time=00:00:19.84 bitrate= 528.5kbits/s speed=5.06x    
2020-11-05 19:50:37.511 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  283 fps= 64 q=31.0 size=    1536kB time=00:00:22.56 bitrate= 557.8kbits/s speed=5.08x    
2020-11-05 19:50:38.012 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  313 fps= 63 q=24.8 size=    1536kB time=00:00:24.96 bitrate= 504.1kbits/s speed=5.05x    
2020-11-05 19:50:38.521 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  345 fps= 63 q=31.0 size=    1792kB time=00:00:27.52 bitrate= 533.4kbits/s speed=5.05x    
2020-11-05 19:50:39.026 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  377 fps= 63 q=31.0 size=    1792kB time=00:00:30.08 bitrate= 488.0kbits/s speed=5.05x    
2020-11-05 19:50:39.534 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  411 fps= 64 q=31.0 size=    2048kB time=00:00:32.80 bitrate= 511.5kbits/s speed=5.07x    
2020-11-05 19:50:40.055 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  443 fps= 63 q=31.0 size=    2304kB time=00:00:35.36 bitrate= 533.8kbits/s speed=5.06x    
2020-11-05 19:50:40.565 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  476 fps= 64 q=31.0 size=    2304kB time=00:00:38.00 bitrate= 496.7kbits/s speed=5.08x    
2020-11-05 19:50:41.056 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  506 fps= 63 q=31.0 size=    2560kB time=00:00:40.40 bitrate= 519.1kbits/s speed=5.06x    
2020-11-05 19:50:41.560 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  538 fps= 63 q=31.0 size=    2560kB time=00:00:42.96 bitrate= 488.2kbits/s speed=5.06x    
2020-11-05 19:50:42.068 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  571 fps= 63 q=31.0 size=    2816kB time=00:00:45.60 bitrate= 505.9kbits/s speed=5.07x    
2020-11-05 19:50:42.574 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  602 fps= 63 q=31.0 size=    3072kB time=00:00:48.08 bitrate= 523.4kbits/s speed=5.06x    
2020-11-05 19:50:43.087 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  636 fps= 64 q=31.0 size=    3072kB time=00:00:50.80 bitrate= 495.4kbits/s speed=5.08x    
2020-11-05 19:50:43.586 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  663 fps= 63 q=31.0 size=    3328kB time=00:00:52.96 bitrate= 514.8kbits/s speed=5.04x    
2020-11-05 19:50:44.086 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  696 fps= 63 q=31.0 size=    3328kB time=00:00:55.63 bitrate= 490.0kbits/s speed=5.05x    
2020-11-05 19:50:44.595 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  728 fps= 63 q=31.0 size=    3584kB time=00:00:58.16 bitrate= 504.8kbits/s speed=5.05x    
2020-11-05 19:50:45.101 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  761 fps= 63 q=31.0 size=    3840kB time=00:01:00.80 bitrate= 517.4kbits/s speed=5.05x    
2020-11-05 19:50:45.602 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  794 fps= 63 q=31.0 size=    3840kB time=00:01:03.44 bitrate= 495.9kbits/s speed=5.06x    
2020-11-05 19:50:46.103 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  827 fps= 63 q=31.0 size=    4096kB time=00:01:06.08 bitrate= 507.8kbits/s speed=5.07x    
2020-11-05 19:50:46.604 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  859 fps= 63 q=31.0 size=    4096kB time=00:01:08.64 bitrate= 488.9kbits/s speed=5.07x    
2020-11-05 19:50:47.116 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  890 fps= 63 q=31.0 size=    4352kB time=00:01:11.12 bitrate= 501.3kbits/s speed=5.06x    
2020-11-05 19:50:47.619 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  924 fps= 64 q=31.0 size=    4608kB time=00:01:13.84 bitrate= 511.2kbits/s speed=5.08x    
2020-11-05 19:50:48.120 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  954 fps= 63 q=31.0 size=    4608kB time=00:01:16.24 bitrate= 495.1kbits/s speed=5.07x    
2020-11-05 19:50:48.631 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame=  986 fps= 63 q=31.0 size=    4864kB time=00:01:18.80 bitrate= 505.7kbits/s speed=5.06x    
2020-11-05 19:50:49.143 5721-6212/maa.slowed_reverb I/mobile-ffmpeg: frame= 1017 fps= 63 q=31.0 size=    4864kB time=00:01:21.28 bitrate= 490.2kbits/s speed=5.06x


    


  • File (mp3) concatenation issues using FFmpeg

    17 novembre 2020, par Giorgio Robino

    I want to concatenate some MP3 files using the FFmpeg concatenation protocol.

    


    Here is a successful try :

    


    $ ffmpeg -loglevel panic -i "concat:audio/it/ci.mp3|audio/it/èsse.mp3|audio/it/cu.mp3|audio/it/u.mp3|audio/it/tre.mp3|audio/it/zero.mp3|audio/it/cinque.mp3|audio/it/quattro.mp3|audio/it/tre.mp3|audio/it/otto.mp3|audio/it/tre.mp3" -c copy audio/it/CSQU3054383.mp3 -y

$ ll audio/it/CSQU3054383.mp3
-rw-rw-r-- 1 giorgio 26K Nov  9 16:16 audio/it/CSQU3054383.mp3


    


    So far, all is OK !

    


    BTW, all (Mp3) files have the same codecs, so MP3 FFmpeg concatenation protocol runs as expected !

    


    


    Now, I want to insert a pause file audio/it/PAUSE_2.mp3, between each previous files :

    


    $ ffmpeg -loglevel panic -i "concat:audio/it/ci.mp3|audio/it/PAUSE_2.mp3|audio/it/èsse.mp3|audio/it/PAUSE_2.mp3|audio/it/cu.mp3|audio/it/PAUSE_2.mp3|audio/it/u.mp3|audio/it/PAUSE_2.mp3|audio/it/tre.mp3|audio/it/PAUSE_2.mp3|audio/it/zero.mp3|audio/it/PAUSE_2.mp3|audio/it/cinque.mp3|audio/it/PAUSE_2.mp3|audio/it/quattro.mp3|audio/it/PAUSE_2.mp3|audio/it/tre.mp3|audio/it/PAUSE_2.mp3|audio/it/otto.mp3|audio/it/PAUSE_2.mp3|audio/it/tre.mp3" -c copy audio/it/CSQU3054383.mp3 -y
$


    


    This command run apparently without any error, but the output file (audio/it/CSQU3054383.mp3) is not generated at all.

    


    **Question 1 (minor) :

    


    Why doesn't FFmpeg report any error and doesn't generate the expected output ?**

    


    In fact, I already experienced that FFmpeg, in some circumstances, fails without saying why :(

    


    


    I suspect the problem happens because the file audio/it/PAUSE_2.mp3 doesn't have a constant bit rate (CBR), as other files, e.g. :

    


    $ mediainfo  audio/it/ci.mp3
General
Complete name                            : audio/it/ci.mp3
Format                                   : MPEG Audio
File size                                : 2.06 KiB
Duration                                 : 528 ms
Overall bit rate mode                    : Constant
Overall bit rate                         : 32.0 kb/s

Audio
Format                                   : MPEG Audio
Format version                           : Version 2
Format profile                           : Layer 3
Duration                                 : 528 ms
Bit rate mode                            : Constant
Bit rate                                 : 32.0 kb/s
Channel(s)                               : 1 channel
Sampling rate                            : 24.0 kHz
Frame rate                               : 41.667 FPS (576 SPF)
Compression mode                         : Lossy
Stream size                              : 2.06 KiB (100%)

$ ffprobe audio/it/ci.mp3
ffprobe version 3.4.8-0ubuntu0.2 Copyright (c) 2007-2020 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
[mp3 @ 0x564491288080] Estimating duration from bitrate, this may be inaccurate
Input #0, mp3, from 'audio/it/ci.mp3':
  Duration: 00:00:00.53, start: 0.000000, bitrate: 32 kb/s
    Stream #0:0: Audio: mp3, 24000 Hz, mono, s16p, 32 kb/s



    


    Instead, the inserted pause file has a variable bit rate, as mediainfo states :

    


    $ mediainfo audio/it/PAUSE_2.mp3
General
Complete name                            : audio/it/PAUSE_2.mp3
Format                                   : MPEG Audio
File size                                : 8.29 KiB
Overall bit rate mode                    : Variable
Writing library                          : LAME3.100

Audio
Format                                   : MPEG Audio
Format version                           : Version 2
Format profile                           : Layer 3
Bit rate mode                            : Variable
Channel(s)                               : 1 channel
Sampling rate                            : 24.0 kHz
Compression mode                         : Lossy
Stream size                              : 8.06 KiB (97%)
Writing library                          : LAME3.100


    


    Here my Bash script I used to generate the pause :

    


    $ cat com/pause&#xA;#!/bin/bash&#xA;&#xA;# https://ffmpeg.org/ffmpeg-filters.html#toc-anullsrc&#xA;# https://ffmpeg.org/ffmpeg-utils.html#toc-Examples-1&#xA;&#xA;if [ $# -eq 0 ]&#xA;  then&#xA;    echo&#xA;    echo "create a pause, a silence audio file (MP3) of specified number of milliseconds"&#xA;    echo&#xA;    echo "usage: $0 <time duration="duration"> <directory path="path">"&#xA;    echo&#xA;    echo "example: $0 2"&#xA;    echo "example: $0 0.5 tmp/"&#xA;    echo&#xA;    exit&#xA;fi&#xA;&#xA;timeDuration=$1&#xA;directoryPath=$2&#xA;&#xA;suffix=mp3&#xA;&#xA;# https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate&#xA;#https://trac.ffmpeg.org/wiki/Encode/MP3&#xA;bitrate=32k&#xA;samplingRate=24000&#xA;outputFile="${directoryPath}PAUSE_${timeDuration}.${suffix}"&#xA;&#xA;  #-b:a $bitrate -minrate $bitrate -maxrate $bitrate -bufsize $bitrate \&#xA;ffmpeg \&#xA;  -f lavfi \&#xA;  -i anullsrc=r=$samplingRate:cl=mono \&#xA;  -t $timeDuration \&#xA;  -b:a $bitrate -minrate $bitrate -maxrate $bitrate \&#xA;  -codec:a libmp3lame \&#xA;  $outputFile -y&#xA;&#xA;echo&#xA;echo "created file: $outputFile"&#xA;echo&#xA;&#xA;</directory></time>

    &#xA;

    Unfortunately, the created file seems with a variable bit rate and not with a constant bit rate (CBR), as expected ( -b:a ... ) :

    &#xA;

    $ com/pause 2&#xA;ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers&#xA;  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)&#xA;  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&#xA;  libavutil      55. 78.100 / 55. 78.100&#xA;  libavcodec     57.107.100 / 57.107.100&#xA;  libavformat    57. 83.100 / 57. 83.100&#xA;  libavdevice    57. 10.100 / 57. 10.100&#xA;  libavfilter     6.107.100 /  6.107.100&#xA;  libavresample   3.  7.  0 /  3.  7.  0&#xA;  libswscale      4.  8.100 /  4.  8.100&#xA;  libswresample   2.  9.100 /  2.  9.100&#xA;  libpostproc    54.  7.100 / 54.  7.100&#xA;Input #0, lavfi, from &#x27;anullsrc=r=24000:cl=mono&#x27;:&#xA;  Duration: N/A, start: 0.000000, bitrate: 192 kb/s&#xA;    Stream #0:0: Audio: pcm_u8, 24000 Hz, mono, u8, 192 kb/s&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (pcm_u8 (native) -> mp3 (libmp3lame))&#xA;Press [q] to stop, [?] for help&#xA;Output #0, mp3, to &#x27;PAUSE_2.mp3&#x27;:&#xA;  Metadata:&#xA;    TSSE            : Lavf57.83.100&#xA;    Stream #0:0: Audio: mp3 (libmp3lame), 24000 Hz, mono, s16p, 32 kb/s&#xA;    Metadata:&#xA;      encoder         : Lavc57.107.100 libmp3lame&#xA;size=       8kB time=00:00:02.01 bitrate=  33.7kbits/s speed= 192x&#xA;video:0kB audio:8kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.870640%&#xA;&#xA;created file: PAUSE_2.mp3&#xA;

    &#xA;

    Question 2 :

    &#xA;

    What's wrong in my Bash script (why doesn't it generate a CBR file ?&#xA;How can I generate an silence pause file (silence of N milliseconds) with the exact settings of previous files ?

    &#xA;

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