[FFmpeg-user] Issue in video compression
Chakraborty, Rakesh
Rakesh.Chakraborty at mheducation.com
Thu Jun 11 19:58:39 EEST 2020
Hi Team,
I am extremely sorry that I forgot to attach the command output. Here's the output for the command that I previously used and my video file is not getting compressed. I used the following command:-
ffmpeg -i Input0.mov -y -fpre ./preset/mp4_Projector.ffpreset -astrict -2 -vsync vfr -acodec copy -vcodec copy -s 1280x720 Output0.mp4
The description of preset file that has been used is as follows:-
vcodec=libx264
vprofile=main
level=30
b:v=800000
bufsize=800000
Command Output:-
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.8)
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-appkit --enable-avfoundation --enable-coreimage --enable-audiotoolbox
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Input0.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2020-04-18T00:26:03.000000Z
Duration: 00:30:59.09, start: 0.000000, bitrate: 675 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2020-04-18T00:26:03.000000Z
handler_name : Core Media Audio
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 607 kb/s, 10 fps, 10 tbr, 600 tbn, 1200 tbc (default)
Metadata:
creation_time : 2020-04-18T00:26:03.000000Z
handler_name : Core Media Video
encoder : H.264
Output #0, mp4, to 'Output0.mp4':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
encoder : Lavf58.29.100
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 800 kb/s, 10 fps, 10 tbr, 19200 tbn, 600 tbc (default)
Metadata:
creation_time : 2020-04-18T00:26:03.000000Z
handler_name : Core Media Video
encoder : H.264
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2020-04-18T00:26:03.000000Z
handler_name : Core Media Audio
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=18590 fps=9689 q=-1.0 Lsize= 152908kB time=00:30:59.07 bitrate= 673.8kbits/s speed= 969x
video:137828kB audio:14382kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.458677%
But the above output file was not compressed.
Normally the duration of the .mov file varies. It may sometimes be 15-30 minutes or 1 hour or even more than 2 hours.
As suggested by one of your expertise, I removed the b:v=800000 from the description of preset file and used the following command adding -crf as suggested by you:-
ffmpeg -i ./recent/Input0.mov -y -crf 24 -b:v 512k -fpre ./preset/mp4_Projector1.ffpreset -astrict -2 -vsync vfr -s 640x480 ./recent/Output0.mp4
One of the .mov files whose size was 405 MB, it got successfully transcoded to .mp4 file and compressed to 83.9 MB
Command Output:-
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.8)
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-appkit --enable-avfoundation --enable-coreimage --enable-audiotoolbox
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './recent/Input0.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2020-06-02T06:49:22.000000Z
com.apple.quicktime.make: Apple
com.apple.quicktime.model: MacBookAir8,1
com.apple.quicktime.software: Mac OS X 10.15.4 (19E287)
com.apple.quicktime.creationdate: 2020-06-01T20:49:20-1000
Duration: 00:14:52.17, start: 0.000000, bitrate: 3631 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt709/bt709, progressive), 640x480 [SAR 1:1 DAR 4:3], 3500 kb/s, 29.01 fps, 29.01 tbr, 30k tbn, 60k tbc (default)
Metadata:
creation_time : 2020-06-02T06:49:22.000000Z
handler_name : Core Media Video
encoder : H.264
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : 2020-06-02T06:49:22.000000Z
handler_name : Core Media Audio
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7fc02f03da00] VBV bufsize set but maxrate unspecified, ignored
[libx264 @ 0x7fc02f03da00] using SAR=1/1
[libx264 @ 0x7fc02f03da00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fc02f03da00] profile Main, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x7fc02f03da00] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=15 lookahead_threads=2 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=24.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to './recent/Output0.mp4':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
com.apple.quicktime.creationdate: 2020-06-01T20:49:20-1000
com.apple.quicktime.make: Apple
com.apple.quicktime.model: MacBookAir8,1
com.apple.quicktime.software: Mac OS X 10.15.4 (19E287)
encoder : Lavf58.29.100
Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 512 kb/s, 29.01 fps, 15k tbn, 29.01 tbc (default)
Metadata:
creation_time : 2020-06-02T06:49:22.000000Z
handler_name : Core Media Video
encoder : Lavc58.54.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/512000 buffer size: 800000 vbv_delay: -1
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)
Metadata:
creation_time : 2020-06-02T06:49:22.000000Z
handler_name : Core Media Audio
encoder : Lavc58.54.100 aac
frame=25881 fps=291 q=-1.0 Lsize= 81901kB time=00:14:52.18 bitrate= 752.0kbits/s speed= 10x
video:73436kB audio:7562kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.114691%
[libx264 @ 0x7fc02f03da00] frame I:105 Avg QP:23.03 size: 21171
[libx264 @ 0x7fc02f03da00] frame P:6524 Avg QP:25.88 size: 5467
[libx264 @ 0x7fc02f03da00] frame B:19252 Avg QP:27.38 size: 1938
[libx264 @ 0x7fc02f03da00] consecutive B-frames: 0.8% 0.0% 0.0% 99.1%
[libx264 @ 0x7fc02f03da00] mb I I16..4: 27.0% 0.0% 73.0%
[libx264 @ 0x7fc02f03da00] mb P I16..4: 1.8% 0.0% 1.1% P16..4: 65.6% 14.3% 9.2% 0.0% 0.0% skip: 8.1%
[libx264 @ 0x7fc02f03da00] mb B I16..4: 0.3% 0.0% 0.1% B16..8: 46.2% 3.3% 0.2% direct: 5.1% skip:44.8% L0:49.2% L1:49.2% BI: 1.6%
[libx264 @ 0x7fc02f03da00] coded y,uvDC,uvAC intra: 70.3% 75.9% 10.7% inter: 13.7% 37.6% 0.0%
[libx264 @ 0x7fc02f03da00] i16 v,h,dc,p: 11% 15% 22% 53%
[libx264 @ 0x7fc02f03da00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 16% 27% 7% 7% 6% 6% 6% 5%
[libx264 @ 0x7fc02f03da00] i8c dc,h,v,p: 63% 20% 11% 6%
[libx264 @ 0x7fc02f03da00] Weighted P-Frames: Y:3.6% UV:1.9%
[libx264 @ 0x7fc02f03da00] ref P L0: 40.1% 10.7% 36.1% 13.0% 0.2%
[libx264 @ 0x7fc02f03da00] ref B L0: 63.6% 22.0% 14.5%
[libx264 @ 0x7fc02f03da00] ref B L1: 83.9% 16.1%
[libx264 @ 0x7fc02f03da00] kb/s:674.29
[aac @ 0x7fc02f03f200] Qavg: 119.931
But, while trying the same command on another .mov file whose size was 562.2 MB and duration was 2h 10m 32s, it is giving error. I used the following command:-
ffmpeg -i ./recent/Input01.mov -y -crf 24 -b:v 512k -fpre ./preset/mp4_Projector1.ffpreset -astrict -2 -vsync vfr -s 1280x720 ./recent/Output01.mp4
Command output:-
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.8)
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-appkit --enable-avfoundation --enable-coreimage --enable-audiotoolbox
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './recent/Input01.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2020-05-18T22:11:48.000000Z
Duration: 02:10:32.15, start: 0.000000, bitrate: 574 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 102 kb/s (default)
Metadata:
creation_time : 2020-05-18T22:11:48.000000Z
handler_name : Core Media Audio
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 466 kb/s, 10 fps, 10 tbr, 600 tbn, 50 tbc (default)
Metadata:
creation_time : 2020-05-18T22:11:49.000000Z
handler_name : Core Media Video
encoder : H.264
Stream mapping:
Stream #0:1 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
Too many packets buffered for output stream 0:1.
[aac @ 0x7fdcc4032600] Qavg: 33517.414
[aac @ 0x7fdcc4032600] 2 frames left in the queue on closing
Conversion failed!
Kindly help me in solving this with a proper command because I am confused with this weird behaviour for two different files using the same command.
Thanks & Regards
Rakesh Chakraborty
Mail to: rakesh.chakraborty at mheducation.com
________________________________
From: ffmpeg-user <ffmpeg-user-bounces at ffmpeg.org> on behalf of Ted Park <kumowoon1025 at gmail.com>
Sent: 11 June 2020 21:04
To: FFmpeg user questions <ffmpeg-user at ffmpeg.org>
Subject: Re: [FFmpeg-user] Issue in video compression
*** EXTERNAL EMAIL: If sender is unknown, use caution when opening. ***
Hi,
> The description of preset file that has been used is as follows:-
>
> vcodec=libx264
> vprofile=main
> level=30
> b:v=800000
> bufsize=800000
>
> But the output .mp4 file is not getting compressed.
My first thought is that the b:v=800000 in the preset file is leading to a constant bit-rate encode. Is the file in question about an hour and 2 minutes long? If it’s close, then I would say that is what’s happening. If there is a file size constraint, you should encode using multiple passes, or if it is just the case that you would like a somewhat smaller file to work with, you can use constant quality (vs. constant bitrate) encoding settings, using -crf to control the output filesize by trial and error, instead of explicitly specifying the video bitrate
Regards,
Ted Park
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