How to play wmv video files?
@halucigenia Seems I need to compile ffmpeg in order to add libfdk_aac. That's going to drag me right out of my comfort zone. I became suspicious when you provided me with a link on how to compile ffmpeg. Enough for tonight, maybe I'll feel braver tomorrow.
dtarrant it looks like you are trying to use ffmpeg native AAC vbr so the parameters should be -c:a aac -q:a 2
ffmpeg -i [input path/filename.WMV] -c:v libx264 -preset slow -tune film -crf 23 -c:a aac -q:a 2 [output path/filename.mp4]
That should work, it works for me but native AAC vbr is experimental in ffmpeg so may not give good quality audio.
Try cbr instead if the audio is not good enough:-
ffmpeg -i [input path/filename.WMV] -c:v libx264 -preset slow -tune film -crf 23 -c:a aac -b:a 160k [output path/filename.mp4]
You should not need to go to the extent of compiling ffmpeg yourself to get an acceptable result. I just meant that if you wanted to get the best out of ffmpeg you should compile.
Sorry for originally giving you parameters that would require ffmpeg to be compiled with libfdk_aac, that's just what I regularly use and I didn't think about the fact that you would not be able to use it without compiling it, my bad!
@halucigenia Many thanks for your latest input. I will certainly give it a try. In the meantime I found another recommendation with a Google search. I tried it and it appears to have worked fine (no audio/video sync problem). The command line I used was as follows:
ffmpeg -i input.wmf -c:v libx264 -crf 23 -c:a -strict -2 -q:a 100 output.mp4
This was from Jeremy Tammik. I've little understanding of what it all means, but I can play the resulting mp4 on my laptop with both videos and VLC. Now I need to try it on my tablet.
@halucigenia Good news, the mp4 file mentioned in my previous post plays nicely on my tablet. I'll try your command line tonight and let you know how I get on. Once again, many thanks for all your support.
@halucigenia I just tried your command line and got a message to warn aac is experimental. It advised adding "-strict -2". After adding that tweak, the conversion is ticking away nicely. I'll keep you posted.
Another tip, while testing you might want to only transcode a portion of the source file to stop it ticking away nicely for too long before you can test it out.
You can use
-ss starttime in HH:MM:SS.xxx
-t endtime in HH:MM:SS.xxx
@dtarrant Just seen your remark about using handbrake for transcoding in the other thread.
Did you know that hanbrake has a command line too - you could use that instead of ffmpeg.
I am sure that if you prefer the handbrake GUI you could batch up a number of transcodes using the same parameters quite easily too.
@halucigenia Well I'm pleased to report that your command line produced an mp4 file that plays fine on my laptop. Many thanks for all your help.
@dtarrant I am pleased for you. Do you need help with a script to process all the files one after the other?
@halucigenia Great tip. That could save a lot of time.
@halucigenia Thanks for the offer. Could well be. Not ready yet though. I've only downloaded 3 of the 39 wmv files so far.
@dtarrant Just let me know, I am still working on a script that could come in handy for me if I ever need to batch convert several files after figuring out why I can't play my mkv files in UT video player.