[FFmpeg-user] bad snapshot-quality from avchd-videofile

[René Calles]

Hi,

as Carl already mentioned you should set the -qscale argument with e.g. -qscale 2.

Cheers,
René
Am 4. April 2014 bei 05:35:20, scenator (info at scenator.de) schrieb:

Hello,I need your help again...The Quality of /all/ extracted snapshot (from  
a HD-videofile) isn't acceptable, please watch the result:  
<http://ffmpeg-users.933282.n4.nabble.com/file/n4664636/Snapshot_1.jpg>  
C:\ProgramData\ffmpeg.exe -i "d:\Temp\STOP!1~1.M2T" -y -s 1920x1080 -ss  
00:00:01.20 -vframes 1 C:\Users\Frank\AppData\Roaming\Snapshot_1.jpgThere is  
no difference in quality by calling ...\Snapshot_1.bmp (6MB) or  
...\Snapshot_1.jpg (157 kb)ffmpeg version N-54499-g63d7684 Copyright (c)  
2000-2013 the FFmpeg developers built on Jul 6 2013 10:30:06 with gcc  
4.7.3 (GCC) configuration: --enable-gpl --enable-version3  
--disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig  
--enable-frei0r --enable-gnutls --enable-iconv --enable-libass  
--enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm  
--enable-libilbc --enable-libmodplug --enable-libmp3lame  
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg  
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr  
--enable-libspeex --enable-libtheora --enable-libtwolame  
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis  
--enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid  
--enable-zlib libavutil 52. 38.100 / 52. 38.100 libavcodec 55.  
18.102 / 55. 18.102 libavformat 55. 11.101 / 55. 11.101 libavdevice  
55. 2.100 / 55. 2.100 libavfilter 3. 78.102 / 3. 78.102 libswscale  
2. 3.100 / 2. 3.100 libswresample 0. 17.102 / 0. 17.102 libpostproc  
52. 3.100 / 52. 3.100Input #0, mpegts, from  
'd:\Temp\Stop!1.HZ!00.32.49.80!bigfile!bigfile!.m2ts': Duration:  
00:16:22.28, start: 1.000033, bitrate: 17304 kb/s Program 1 Stream  
#0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1920x1080  
[SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc Stream #0:1[0x1100]:  
Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 448 kb/s  
Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] /  
0x0090)Best regards in advantage, Frank  



--  
View this message in context: http://ffmpeg-users.933282.n4.nabble.com/bad-snapshot-quality-from-avchd-videofile-tp4664636.html  
Sent from the FFmpeg-users mailing list archive at Nabble.com.  
_______________________________________________  
ffmpeg-user mailing list  
ffmpeg-user at ffmpeg.org  
http://ffmpeg.org/mailman/listinfo/ffmpeg-user