Hi, I have been searching all over for a program that "converts" (not in the recoding sense) an mkv file to an avi file. Many users here and elsewhere recommended Avidemux, so I gave it a go. To see if the end-product is up to scratch I tried it (version 2.6.1) on a file. While the output avi file's video quality was exactly the same as the original mkv (half the battle won), the audio was too fast, which points to an a/v sync issue I think. Below is the info for the file:
General
Unique ID : 235679772993651231585771229640867026856 (0xB14E45F10E8EEF4A80B6C182690597A8)
Complete name : C:\Users\Arnold\Downloads\Dr. Strangelove.mkv
Format : Matroska
Format version : Version 2
File size : 600 MiB
Duration : 1h 34mn
Overall bit rate : 886 Kbps
Movie name : Dr. Strangelove - YIFY
Encoded date : UTC 2011-06-01 11:56:23
Writing application : mkvmerge v4.8.0 ('I Got The...') built on May 24 2011 03:12:58
Writing library : libebml v1.2.0 + libmatroska v1.1.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Muxing mode : Header stripping
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 34mn
Nominal bit rate : 852 Kbps
Width : 1 200 pixels
Height : 720 pixels
Display aspect ratio : 1.667
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.041
Title : Dr. Strangelove - YIFY
Writing library : x264 core 114 r1924 08d04a4
Encoding settings : cabac=1 / ref=5 / deblock=1:-2:-1 / analyse=0x3:0x113 / me=umh / subme=5 / psy=1 / psy_rd=0.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=16 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc=2pass / mbtree=0 / bitrate=852 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=2:1.00
Default : Yes
Forced : No
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AAC / LC
Codec ID : A_AAC
Duration : 1h 34mn
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz / 24.0 KHz
Compression mode : Lossy
Title : Dr. Strangelove - YIFY
Default : Yes
Forced : No
Text
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : Dr. Strangelove - YIFY
Language : English
Default : No
Forced : No
In the last 24 hours I have tried using every codec in the Video Output (HuffYUV, FLV1, etc) and Audio Output (Faac, lav, etc) to see if that'll change things, to no avail. That was after I checked the "Shift" tickbox in Audio. Essentially the end-product avi file is always the same, audio-delayed mess. When I played all of them on VLC, and used Track Synchronization to "correct" the delay, it seems the audio was delayed by 600ms from start to finish. But interestingly, before my final 4 tries with Avidemux conversions, I clicked on Information and saw the duration for audio was 01:34:46.468 and video was shorter, at 01:34:46:139. The instinct would be to check "Shift" for a 329ms delay, right? Well, as I said,no matter how many times I checked "Shift", there was no change.
Please can someone help me? I've scoured these forums and have found intermittently that users have faced similar audio sync problems with Avidemux, which have never been solved. Unfortunately, Avidemux seems the most capable software for what I want: MKV to AVI conversion without necessarily recoding, to preserve quality. The bloody thing is almost there, save for the syncing issue, it'll be a shame to have to settle with re-encoding my mkv files!! Apologies for the very long post, it's my first :)
General
Unique ID : 235679772993651231585771229640867026856 (0xB14E45F10E8EEF4A80B6C182690597A8)
Complete name : C:\Users\Arnold\Downloads\Dr. Strangelove.mkv
Format : Matroska
Format version : Version 2
File size : 600 MiB
Duration : 1h 34mn
Overall bit rate : 886 Kbps
Movie name : Dr. Strangelove - YIFY
Encoded date : UTC 2011-06-01 11:56:23
Writing application : mkvmerge v4.8.0 ('I Got The...') built on May 24 2011 03:12:58
Writing library : libebml v1.2.0 + libmatroska v1.1.0
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Muxing mode : Header stripping
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 34mn
Nominal bit rate : 852 Kbps
Width : 1 200 pixels
Height : 720 pixels
Display aspect ratio : 1.667
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.041
Title : Dr. Strangelove - YIFY
Writing library : x264 core 114 r1924 08d04a4
Encoding settings : cabac=1 / ref=5 / deblock=1:-2:-1 / analyse=0x3:0x113 / me=umh / subme=5 / psy=1 / psy_rd=0.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=16 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc=2pass / mbtree=0 / bitrate=852 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=2:1.00
Default : Yes
Forced : No
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AAC / LC
Codec ID : A_AAC
Duration : 1h 34mn
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz / 24.0 KHz
Compression mode : Lossy
Title : Dr. Strangelove - YIFY
Default : Yes
Forced : No
Text
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : Dr. Strangelove - YIFY
Language : English
Default : No
Forced : No
In the last 24 hours I have tried using every codec in the Video Output (HuffYUV, FLV1, etc) and Audio Output (Faac, lav, etc) to see if that'll change things, to no avail. That was after I checked the "Shift" tickbox in Audio. Essentially the end-product avi file is always the same, audio-delayed mess. When I played all of them on VLC, and used Track Synchronization to "correct" the delay, it seems the audio was delayed by 600ms from start to finish. But interestingly, before my final 4 tries with Avidemux conversions, I clicked on Information and saw the duration for audio was 01:34:46.468 and video was shorter, at 01:34:46:139. The instinct would be to check "Shift" for a 329ms delay, right? Well, as I said,no matter how many times I checked "Shift", there was no change.
Please can someone help me? I've scoured these forums and have found intermittently that users have faced similar audio sync problems with Avidemux, which have never been solved. Unfortunately, Avidemux seems the most capable software for what I want: MKV to AVI conversion without necessarily recoding, to preserve quality. The bloody thing is almost there, save for the syncing issue, it'll be a shame to have to settle with re-encoding my mkv files!! Apologies for the very long post, it's my first :)