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

[scenator]

Unfortunately, the topic was bad formated:

call:
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.jpg

There is no difference in quality by calling ...\Snapshot_1.bmp (6MB) or
...\Snapshot_1.jpg (157 kb)

video-details:
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. 3.100 Input #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 



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