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jcivit

25 Jan, 2012 11:26 AM via web

Good morning.
I am actually working with your templates and I have several questions.. I need to transcode avi, mp4, mpeg,.. and also different audio codecs ( mp3, aac, wav.. )

The question would be: Can I transcode any input video with a single ffmpeg command? Or do I have to make a kind of swtich considering every input format?

Do you have standard commands for avis, mp4, etc so you can help me?

Thank you very much!

  1. Support Staff 2 Posted by tim on 25 Jan, 2012 12:38 PM

    tim's Avatar

    Hey jcivit,

    for all the different formats you want to encode into, you'd have to add one encoding step to your template. You may be able to use some of our presets for some of your steps. Please check out the video encode docs here: http://transloadit.com/docs/video-encode and the video encoding demos here: http://transloadit.com/demos

    Presets can be partially overwritten by adding the "ffmpeg" parameter to your encoding step. Again plz check the video encode robot docs.

    Let me know if this helps. :)

    Kind regards
    Tim

  2. 3 Posted by Josep on 25 Jan, 2012 03:26 PM

    Josep's Avatar

    Hi Tim!

    First of all, thank you for your answer. I am checking best encoding 'rules' for each format.

    "video_preview": {

    "use": ":original",
"robot": "/video/encode",
"width": 620,
"height": 360,
"ffmpeg": {
  "f": "mp4",
   "vcodec": "libx264",
   "b": "2000K",
   "aspect": "16:9",
   "acodec": "libmp3lame",
    "t": 5
}

    },

    I am trying this one, but I get an error at the end of the procces, but no info about it.

    Maybe the error is when I try to keep the aspect ratio?

    Thanks

  3. Support Staff 4 Posted by tim on 25 Jan, 2012 03:54 PM

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    Hey Josep,

    well the aspect ratio should be kept by default. You should only add the parameter if you want to change it.

    Can you provide the assembly's id? Then I can take a look at what the problem was.

    Kind regards
    Tim

  4. 5 Posted by Josep on 25 Jan, 2012 04:10 PM

    Josep's Avatar

    b611c60cc041ca3971d6af85572e44f1

    This Id is the last 'compiled' assembly, and I get an error.

  5. 6 Posted by Josep on 25 Jan, 2012 04:11 PM

    Josep's Avatar

    File for preset 'max' not found... Now I see I can check assemblies...

    SORRy... I dont want to waste other people time...

  6. Support Staff 7 Posted by tim on 25 Jan, 2012 05:25 PM

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    Hey Josep,

    unfortunately we do not support vpre: max yet. : /

  7. 8 Posted by Josep on 26 Jan, 2012 03:21 PM

    Josep's Avatar

    Hi again, I always get this error: Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height

    ID_ assembly: aabe6d034ba707e78d4c62e065702fb2

    ffmpeg -i 720p.mov -vcodec libx264 -s 1366x768 -b 2000k -acodec libfaac -ab 128k output.mp4

    This works perfect under my linux but not here...

    Thanks...

  8. Support Staff 9 Posted by tim on 26 Jan, 2012 04:11 PM

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    Hey Josep,

    can you remove the "aspect" parameter from your ffmpeg settings in your template and then try again please? Since you have specified a width and height, this should not be necessary.

    Kind regards
    Tim

  9. 10 Posted by Josep on 03 Feb, 2012 11:45 AM

    Josep's Avatar

    Hi again Tim,

    Yesterday I made a test against the video_ALL_IN_ONE template. The assemblie ID for this template is 38bffb0b6c1cf27ddb5163516ab2d3c8

    The question is that it took 17 min to upload convert and save a 8 seg file ( 10MB ) which I think its not too big. The upload took 1 minute, so the rest is for transcoding, and the template did not require "too much effort".

    I wonder why i took that time for the transcoding.. The same transcoding in a virtual ubuntu took less than 1 second for a 442MB file..

    Thank you.

  10. Support Staff 11 Posted by tim on 03 Feb, 2012 12:27 PM

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    Hey Josep,

    thanks for getting in touch. The problem is that one of our high-profile clients ran a large import yesterday which caused elevated queue times.

    Sorry about that. We constantly investigate different ways to keep queue times low.

    Kind regards
    Tim

  11. 12 Posted by Josep Civit on 03 Feb, 2012 01:29 PM

    Josep Civit's Avatar

    Hi Tim,

    We are a company, ACV Global. We are setting up a new project and we are
    evaluating Transload IT. We offer to our customers a 24x7 service. We can
    NOT support these long delays. Which is your level of commitment? Can you
    provide us a written SLA?

    Thank you,

    Josep.

    -----Mensaje original-----
    De: tim
    [mailto:***@tenderapp.com]
    Enviado el: viernes, 03 de febrero de 2012 13:28
    Para: ***@acvglobal.com
    Asunto: Re: Multiple transcod.. [Questions]

  12. Support Staff 13 Posted by tim on 03 Feb, 2012 01:57 PM

    tim's Avatar

    Hey Josep,

    I'd love to, but since we offer our customers and potential customers (like you) the ability to run large imports any time without prior written notice, we cannot offer an SLA that concerns queue times.

    We have very low queue times most of the time. But our load is pretty unpredictable.
    If you demand a dedicated encoding solution I'd recommend pandastream.com. They offer you the ability to have a dedicated encoding machine that you can use. It's $99 per month (our pricing starts at $19).

    If your users use up the machine themselves you'd have to add another machine manually - for another $99 per month. So you are more or less in charge of the scaling yourself, which is not good and that's not what cloud services are for.

    We provide scaling on demand without you having to worry about it. If we are hit by an unexpected high load, which happens very rarely, there is little we can do, other than starting many machines automatically to catch up on the queue.

    Having said this, If you'd like to reconsider your opinion, please let me know. We can also schedule a skype call where I can further explain this and the benefits of using Transloadit over our competition.

    Kind regards,
    Tim

    PS: If you'd like an SLA about the service itself without the queue times, we can def. work something out.

  13. 14 Posted by Josep on 13 Feb, 2012 11:41 AM

    Josep's Avatar

    Hi again Tim!

    Good morning, at least here in Barcelona!

    I am traying a template and when i test it i got an error result, assembly # a9327cf6a95eb180c719065a415c7460. It says, "Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height"

    I checked these parameters and seems that they are ok! Any idea?

    Thank you!

  14. Support Staff 15 Posted by tim on 13 Feb, 2012 01:21 PM

    tim's Avatar

    Hey Josep,

    can you try adding

    vpre: "medium"

    to your ffmpeg settings please?

  15. 16 Posted by Josep on 13 Feb, 2012 03:37 PM

    Josep's Avatar

    The system is stuck... At 4:09pm I started uploading, at 4:11 ended uploading and started transcoding. Still waiting for results...

  16. Support Staff 17 Posted by Felix Geisendörfer on 05 Mar, 2012 08:24 AM

    Felix Geisendörfer's Avatar

    The system is stuck... At 4:09pm I started uploading, at 4:11 ended uploading and started transcoding. Still waiting for results...

    Do you have an assembly id for this?

  17. Support Staff 18 Posted by tim on 31 Mar, 2012 09:02 AM

    tim's Avatar

    Hey Josep,

    did you see Felix' reply?

  18. Support Staff 19 Posted by tim on 18 Apr, 2012 09:24 AM

    tim's Avatar

    Closing this for now. Please feel free to reopen the ticket as you see fit.

  19. tim closed this discussion on 18 Apr, 2012 09:24 AM.

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