Hello Everyone,
I have tried to convert some videos to mp4 format what has surprised me
was the size of the videos, After the conversion some videos were 2,3,4
times bigger then the original wmv files. Here is the command i used to
convert : /usr/local/bin/ffmpeg -i video500.wmv -c:a libfdk_aac -c:v
nvenc_h264 video500.mp4 ; After this command the mp4 file is 630MB and
the wmv file is 150MB (you can find attached the ffprobe to bothe
files). If you can suggest any way on how to keep the quality and make
the mp4 files smaller please let me know .
ps: On some mp4 videos the bitrate has doubled have no idea why ?
BR
ffprobe video500.mp4
*********************************
ffprobe version 3.3.3 Copyright (c) 2007-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
configuration: --enable-gpl --enable-libass --enable-libfdk-aac
--enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora
--enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
--enable-nonfree --enable-cuda --enable-cuvid --enable-nvenc --bindir=/usr/bin
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video500.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.71.100
Duration: 00:41:26.32, start: 0.000000, bitrate: 2122 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 480x360
[SAR 1:1 DAR 4:3], 1987 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo,
fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
ffprobe video500.wmv
*******************************
ffprobe version 3.3.3 Copyright (c) 2007-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
configuration: --enable-gpl --enable-libass --enable-libfdk-aac
--enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora
--enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
--enable-nonfree --enable-cuda --enable-cuvid --enable-nvenc --bindir=/usr/bin
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
Input #0, asf, from 'video500.wmv':
Metadata:
VBR Peak : 1389000
DeviceConformanceTemplate: MP@ML
WM/WMADRCPeakReference: 32767
WM/WMADRCAverageReference: 4467
WMFSDKVersion : 9.00.00.3267
WMFSDKNeeded : 0.0.0.0000
IsVBR : 1
Buffer Average : 112323
Duration: 00:41:20.17, start: 0.000000, bitrate: 504 kb/s
Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels,
fltp, 48 kb/s
Stream #0:1(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 480x360,
443 kb/s, 29.97 tbr, 1k tbn, 1k tbc
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