Super User Asked on January 3, 2022
When converting a WMV file to an MP4 file, it says
[mp4 @ 0x989c160] track 1: could not find tag, codec not currently
supported in container
and
Could not write header for output file #0 (incorrect codec parameters
?): Operation not permitted.
But converting the WMV file to an MKV file is fine. Wonder why?
Following are the outputs of both cases.
Converting from the wmv file to a mp4 file is not working
$ ffmpeg -i "1.wmv" -c:v libx264 -crf 23 -c:a copy "1.mp4"
ffmpeg version git-2012-06-03-169dae8 Copyright (c) 2000-2012 the FFmpeg developers
built on Jun 3 2012 09:14:54 with gcc 4.6.3
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grab
libavutil 51. 56.100 / 51. 56.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, asf, from '1.wmv':
Metadata:
WMFSDKVersion : 9.00.00.3267
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
Duration: 01:40:50.70, start: 0.000000, bitrate: 2100 kb/s
Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, s16, 128 kb/s
Stream #0:1(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 640x480, 1974 kb/s, 29.97 tbr, 1k tbn, 1k tbc
[buffer @ 0x98c28c0] w:640 h:480 pixfmt:yuv420p tb:1/1000 sar:0/1 sws_param:flags=2
[buffersink @ 0x9894320] No opaque field provided
[libx264 @ 0x98b0ec0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
[libx264 @ 0x98b0ec0] profile High, level 3.0
[libx264 @ 0x98b0ec0] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[mp4 @ 0x989c160] track 1: could not find tag, codec not currently supported in container
Output #0, mp4, to '1.mp4':
Metadata:
WMFSDKVersion : 9.00.00.3267
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
encoder : Lavf54.6.101
Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x480, q=-1--1, 30k tbn, 29.97 tbc
Stream #0:1(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0:1 -> #0:0 (wmv3 -> libx264)
Stream #0:0 -> #0:1 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Operation not permitted
Converting from the wmv file to a mkv file is fine:
$ ffmpeg -i "1.wmv" -c:v libx264 -crf 23 -c:a copy "1.mkv"
ffmpeg version git-2012-06-03-169dae8 Copyright (c) 2000-2012 the FFmpeg developers
built on Jun 3 2012 09:14:54 with gcc 4.6.3
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grab
libavutil 51. 56.100 / 51. 56.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, asf, from '1.wmv':
Metadata:
WMFSDKVersion : 9.00.00.3267
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
Duration: 01:40:50.70, start: 0.000000, bitrate: 2100 kb/s
Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, s16, 128 kb/s
Stream #0:1(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 640x480, 1974 kb/s, 29.97 tbr, 1k tbn, 1k tbc
File '1.mkv' already exists. Overwrite ? [y/N] y
w:640 h:480 pixfmt:yuv420p tb:1/1000 sar:0/1 sws_param:flags=2
[buffersink @ 0xa0a2760] No opaque field provided
[libx264 @ 0xa0b6ec0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
[libx264 @ 0xa0b6ec0] profile High, level 3.0
[libx264 @ 0xa0b6ec0] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, matroska, to '1.mkv':
Metadata:
WMFSDKVersion : 9.00.00.3267
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
encoder : Lavf54.6.101
Stream #0:0(eng): Video: h264, yuv420p, 640x480, q=-1--1, 1k tbn, 29.97 tbc
Stream #0:1(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0:1 -> #0:0 (wmv3 -> libx264)
Stream #0:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 325 fps=106 q=29.0 size= 411kB time=00:00:09.20 bitrate= 366.0kbits/s
try just doing:
ffmpeg -y -i 1.wmv -b:v 2000k 1.mp4
ffmpeg should automatically pick the most appropriate audio format and use libx264 for the video, the 2000k is essentially telling it to encode at the same bitrate as the original video file.
Answered by Justin Buser on January 3, 2022
codec not currently supported in container
That's your error.
Try specifying another audio codec like with -c:a aac. MP4 doesn't take Windows Media Audio in its container. You have to choose a matching audio codec, like AAC. Right now all you do is try to copy the bitstream, and that fails – as indicated by the error message.
The same problem of non-matching codecs goes for other containers, although MKV is way more open to other codecs than MP4 is, therefore you can use almost any codecs within an MKV container. This does not work for MP4.
In general though, for maximum compatibility, try to stick to the most common formats for containers, e.g.
Answered by slhck on January 3, 2022
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