[FFmpeg-user] trouble confirming ffv1 lossless encode
Nathan Lewis
nlewis at mail.crawford.com
Wed Jan 30 21:20:31 CET 2013
Hi,
I'm attempting to verify that a transcode to ffv1 from 8 bit uncompressed
is truly lossless. Below you will find the complete output from my 8bit
uncompressed to ffv1 transcode as well as my framemd5 passes of my original
input and output file. I have separated the ffmpeg outputs with "#####"
for clarity.
Please let me know if you have any suggestions or questions.
Regards,
Nathan
$ ffmpeg -i 8bit_uncomp.mov -c:v ffv1 -coder 1 -context 1 -g 1 -c:a copy
ffv1_lossless.mov
ffmpeg version 1.0.3 Copyright (c) 2000-2012 the FFmpeg developers
built on Jan 27 2013 20:29:40 with llvm-gcc 4.2.1 (LLVM build 2335.15.00)
configuration: --enable-nonfree --enable-gpl --enable-libfaac
--enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx
--enable-pthreads --enable-libx264 --enable-version3
libavutil 51. 73.101 / 51. 73.101
libavcodec 54. 59.100 / 54. 59.100
libavformat 54. 29.104 / 54. 29.104
libavdevice 54. 2.101 / 54. 2.101
libavfilter 3. 17.100 / 3. 17.100
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '8bit_uncomp.mov':
Metadata:
creation_time : 2012-12-12 17:43:27
Duration: 00:15:34.53, start: 0.000000, bitrate: 171792 kb/s
Stream #0:0(eng): Video: rawvideo (yuvs / 0x73767579), yuyv422,
720x486, 167793 kb/s, 29.97 fps, 29.97 tbr, 29970 tbn, 29970 tbc
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
timecode : 00:00:00:05
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
timecode : 00:00:00:05
[mov @ 0x7f8be2874e00] Using MS style video codec tag, the file may be
unplayable!
Output #0, mov, to 'ffv1_lossless.mov':
Metadata:
encoder : Lavf54.29.104
Stream #0:0(eng): Video: ffv1, yuv422p, 720x486, q=2-31, 200 kb/s, 2997
tbn, 29.97 tbc
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
timecode : 00:00:00:05
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, 1536 kb/s
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> ffv1)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=28008 fps= 15 q=0.0 Lsize= 6641236kB time=00:15:34.56
bitrate=58214.1kbits/s
video:6465435kB audio:175231kB subtitle:0 global headers:0kB muxing
overhead 0.008581%
###################################################################################
$ ffmpeg -i 8bit_uncomp.mov -an -f framemd5 8bit_uncomp.framemd5
ffmpeg version 1.0.3 Copyright (c) 2000-2012 the FFmpeg developers
built on Jan 27 2013 20:29:40 with llvm-gcc 4.2.1 (LLVM build 2335.15.00)
configuration: --enable-nonfree --enable-gpl --enable-libfaac
--enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx
--enable-pthreads --enable-libx264 --enable-version3
libavutil 51. 73.101 / 51. 73.101
libavcodec 54. 59.100 / 54. 59.100
libavformat 54. 29.104 / 54. 29.104
libavdevice 54. 2.101 / 54. 2.101
libavfilter 3. 17.100 / 3. 17.100
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '8bit_uncomp.mov':
Metadata:
creation_time : 2012-12-12 17:43:27
Duration: 00:15:34.53, start: 0.000000, bitrate: 171792 kb/s
Stream #0:0(eng): Video: rawvideo (yuvs / 0x73767579), yuyv422,
720x486, 167793 kb/s, 29.97 fps, 29.97 tbr, 29970 tbn, 29970 tbc
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
timecode : 00:00:00:05
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
timecode : 00:00:00:05
Output #0, framemd5, to '8bit_uncomp.framemd5':
Metadata:
encoder : Lavf54.29.104
Stream #0:0(eng): Video: rawvideo (YUY2 / 0x32595559), yuyv422,
720x486, q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc
Metadata:
creation_time : 2012-12-12 17:43:27
handler_name : Apple Alias Data Handler
timecode : 00:00:00:05
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> rawvideo)
Press [q] to stop, [?] for help
frame=28008 fps= 49 q=0.0 Lsize= 2188kB time=00:15:34.53 bitrate=
19.2kbits/s
video:19141718kB audio:0kB subtitle:0 global headers:0kB muxing overhead
-99.988569%
#################################################################################
$ ffmpeg -i ffv1_lossless.mov -an -f framemd5 ffv1_lossless.framemd5
ffmpeg version 1.0.3 Copyright (c) 2000-2012 the FFmpeg developers
built on Jan 27 2013 20:29:40 with llvm-gcc 4.2.1 (LLVM build 2335.15.00)
configuration: --enable-nonfree --enable-gpl --enable-libfaac
--enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx
--enable-pthreads --enable-libx264 --enable-version3
libavutil 51. 73.101 / 51. 73.101
libavcodec 54. 59.100 / 54. 59.100
libavformat 54. 29.104 / 54. 29.104
libavdevice 54. 2.101 / 54. 2.101
libavfilter 3. 17.100 / 3. 17.100
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'ffv1_lossless.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf54.29.104
Duration: 00:15:34.56, start: 0.000000, bitrate: 58214 kb/s
Stream #0:0(eng): Video: ffv1 (FFV1 / 0x31564646), yuv422p, 720x486,
56675 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 2997 tbc
Metadata:
handler_name : DataHandler
timecode : 00:00:00:05
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s
Metadata:
handler_name : DataHandler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
handler_name : DataHandler
timecode : 00:00:00:05
Output #0, framemd5, to 'ffv1_lossless.framemd5':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf54.29.104
Stream #0:0(eng): Video: rawvideo (Y42B / 0x42323459), yuv422p,
720x486, q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc
Metadata:
handler_name : DataHandler
timecode : 00:00:00:05
Stream mapping:
Stream #0:0 -> #0:0 (ffv1 -> rawvideo)
Press [q] to stop, [?] for help
frame=28008 fps= 22 q=0.0 Lsize= 2188kB time=00:15:34.53 bitrate=
19.2kbits/s
video:19141718kB audio:0kB subtitle:0 global headers:0kB muxing overhead
-99.988569%
More information about the ffmpeg-user
mailing list